drivers/clk/nxp/clk-lpc32xx.c

   1 /*
   2  * Copyright 2015 Vladimir Zapolskiy <vz@mleia.com>
   3  *
   4  * The code contained herein is licensed under the GNU General Public
   5  * License. You may obtain a copy of the GNU General Public License
   6  * Version 2 or later at the following locations:
   7  *
   8  * http://www.opensource.org/licenses/gpl-license.html
   9  * http://www.gnu.org/copyleft/gpl.html
  10  */
  11
  12 #include <linux/clk.h>
  13 #include <linux/clk-provider.h>
  14 #include <linux/io.h>
  15 #include <linux/of_address.h>
  16 #include <linux/regmap.h>
  17
  18 #include <dt-bindings/clock/lpc32xx-clock.h>
  19
  20 #undef pr_fmt
  21 #define pr_fmt(fmt) "%s: " fmt, __func__
  22
  23 /* Common bitfield definitions for x397 PLL (lock), USB PLL and HCLK PLL */
  24 #define PLL_CTRL_ENABLE                 BIT(16)
  25 #define PLL_CTRL_BYPASS                 BIT(15)
  26 #define PLL_CTRL_DIRECT                 BIT(14)
  27 #define PLL_CTRL_FEEDBACK               BIT(13)
  28 #define PLL_CTRL_POSTDIV                (BIT(12)|BIT(11))
  29 #define PLL_CTRL_PREDIV                 (BIT(10)|BIT(9))
  30 #define PLL_CTRL_FEEDDIV                (0xFF << 1)
  31 #define PLL_CTRL_LOCK                   BIT(0)
  32
  33 /* Clock registers on System Control Block */
  34 #define LPC32XX_CLKPWR_DEBUG_CTRL       0x00
  35 #define LPC32XX_CLKPWR_USB_DIV          0x1C
  36 #define LPC32XX_CLKPWR_HCLKDIV_CTRL     0x40
  37 #define LPC32XX_CLKPWR_PWR_CTRL         0x44
  38 #define LPC32XX_CLKPWR_PLL397_CTRL      0x48
  39 #define LPC32XX_CLKPWR_OSC_CTRL         0x4C
  40 #define LPC32XX_CLKPWR_SYSCLK_CTRL      0x50
  41 #define LPC32XX_CLKPWR_LCDCLK_CTRL      0x54
  42 #define LPC32XX_CLKPWR_HCLKPLL_CTRL     0x58
  43 #define LPC32XX_CLKPWR_ADCCLK_CTRL1     0x60
  44 #define LPC32XX_CLKPWR_USB_CTRL         0x64
  45 #define LPC32XX_CLKPWR_SSP_CTRL         0x78
  46 #define LPC32XX_CLKPWR_I2S_CTRL         0x7C
  47 #define LPC32XX_CLKPWR_MS_CTRL          0x80
  48 #define LPC32XX_CLKPWR_MACCLK_CTRL      0x90
  49 #define LPC32XX_CLKPWR_TEST_CLK_CTRL    0xA4
  50 #define LPC32XX_CLKPWR_I2CCLK_CTRL      0xAC
  51 #define LPC32XX_CLKPWR_KEYCLK_CTRL      0xB0
  52 #define LPC32XX_CLKPWR_ADCCLK_CTRL      0xB4
  53 #define LPC32XX_CLKPWR_PWMCLK_CTRL      0xB8
  54 #define LPC32XX_CLKPWR_TIMCLK_CTRL      0xBC
  55 #define LPC32XX_CLKPWR_TIMCLK_CTRL1     0xC0
  56 #define LPC32XX_CLKPWR_SPI_CTRL         0xC4
  57 #define LPC32XX_CLKPWR_FLASHCLK_CTRL    0xC8
  58 #define LPC32XX_CLKPWR_UART3_CLK_CTRL   0xD0
  59 #define LPC32XX_CLKPWR_UART4_CLK_CTRL   0xD4
  60 #define LPC32XX_CLKPWR_UART5_CLK_CTRL   0xD8
  61 #define LPC32XX_CLKPWR_UART6_CLK_CTRL   0xDC
  62 #define LPC32XX_CLKPWR_IRDA_CLK_CTRL    0xE0
  63 #define LPC32XX_CLKPWR_UART_CLK_CTRL    0xE4
  64 #define LPC32XX_CLKPWR_DMA_CLK_CTRL     0xE8
  65
  66 /* Clock registers on USB controller */
  67 #define LPC32XX_USB_CLK_CTRL            0xF4
  68 #define LPC32XX_USB_CLK_STS             0xF8
  69
  70 static struct regmap_config lpc32xx_scb_regmap_config = {
  71         .name = "scb",
  72         .reg_bits = 32,
  73         .val_bits = 32,
  74         .reg_stride = 4,
  75         .val_format_endian = REGMAP_ENDIAN_LITTLE,
  76         .max_register = 0x114,
  77         .fast_io = true,
  78 };
  79
  80 static struct regmap *clk_regmap;
  81 static void __iomem *usb_clk_vbase;
  82
  83 enum {
  84         LPC32XX_USB_CLK_OTG = LPC32XX_USB_CLK_HOST + 1,
  85         LPC32XX_USB_CLK_AHB,
  86
  87         LPC32XX_USB_CLK_MAX = LPC32XX_USB_CLK_AHB + 1,
  88 };
  89
  90 enum {
  91         /* Start from the last defined clock in dt bindings */
  92         LPC32XX_CLK_ADC_DIV = LPC32XX_CLK_PERIPH + 1,
  93         LPC32XX_CLK_ADC_RTC,
  94         LPC32XX_CLK_TEST1,
  95         LPC32XX_CLK_TEST2,
  96
  97         /* System clocks, PLL 397x and HCLK PLL clocks */
  98         LPC32XX_CLK_OSC,
  99         LPC32XX_CLK_SYS,
 100         LPC32XX_CLK_PLL397X,
 101         LPC32XX_CLK_HCLK_DIV_PERIPH,
 102         LPC32XX_CLK_HCLK_DIV,
 103         LPC32XX_CLK_HCLK,
 104         LPC32XX_CLK_ARM,
 105         LPC32XX_CLK_ARM_VFP,
 106
 107         /* USB clocks */
 108         LPC32XX_CLK_USB_PLL,
 109         LPC32XX_CLK_USB_DIV,
 110         LPC32XX_CLK_USB,
 111
 112         /* Only one control PWR_CTRL[10] for both muxes */
 113         LPC32XX_CLK_PERIPH_HCLK_MUX,
 114         LPC32XX_CLK_PERIPH_ARM_MUX,
 115
 116         /* Only one control PWR_CTRL[2] for all three muxes */
 117         LPC32XX_CLK_SYSCLK_PERIPH_MUX,
 118         LPC32XX_CLK_SYSCLK_HCLK_MUX,
 119         LPC32XX_CLK_SYSCLK_ARM_MUX,
 120
 121         /* Two clock sources external to the driver */
 122         LPC32XX_CLK_XTAL_32K,
 123         LPC32XX_CLK_XTAL,
 124
 125         /* Renumbered USB clocks, may have a parent from SCB table */
 126         LPC32XX_CLK_USB_OFFSET,
 127         LPC32XX_CLK_USB_I2C = LPC32XX_USB_CLK_I2C + LPC32XX_CLK_USB_OFFSET,
 128         LPC32XX_CLK_USB_DEV = LPC32XX_USB_CLK_DEVICE + LPC32XX_CLK_USB_OFFSET,
 129         LPC32XX_CLK_USB_HOST = LPC32XX_USB_CLK_HOST + LPC32XX_CLK_USB_OFFSET,
 130         LPC32XX_CLK_USB_OTG = LPC32XX_USB_CLK_OTG + LPC32XX_CLK_USB_OFFSET,
 131         LPC32XX_CLK_USB_AHB = LPC32XX_USB_CLK_AHB + LPC32XX_CLK_USB_OFFSET,
 132
 133         /* Stub for composite clocks */
 134         LPC32XX_CLK__NULL,
 135
 136         /* Subclocks of composite clocks, clocks above are for CCF */
 137         LPC32XX_CLK_PWM1_MUX,
 138         LPC32XX_CLK_PWM1_DIV,
 139         LPC32XX_CLK_PWM1_GATE,
 140         LPC32XX_CLK_PWM2_MUX,
 141         LPC32XX_CLK_PWM2_DIV,
 142         LPC32XX_CLK_PWM2_GATE,
 143         LPC32XX_CLK_UART3_MUX,
 144         LPC32XX_CLK_UART3_DIV,
 145         LPC32XX_CLK_UART3_GATE,
 146         LPC32XX_CLK_UART4_MUX,
 147         LPC32XX_CLK_UART4_DIV,
 148         LPC32XX_CLK_UART4_GATE,
 149         LPC32XX_CLK_UART5_MUX,
 150         LPC32XX_CLK_UART5_DIV,
 151         LPC32XX_CLK_UART5_GATE,
 152         LPC32XX_CLK_UART6_MUX,
 153         LPC32XX_CLK_UART6_DIV,
 154         LPC32XX_CLK_UART6_GATE,
 155         LPC32XX_CLK_TEST1_MUX,
 156         LPC32XX_CLK_TEST1_GATE,
 157         LPC32XX_CLK_TEST2_MUX,
 158         LPC32XX_CLK_TEST2_GATE,
 159         LPC32XX_CLK_USB_DIV_DIV,
 160         LPC32XX_CLK_USB_DIV_GATE,
 161         LPC32XX_CLK_SD_DIV,
 162         LPC32XX_CLK_SD_GATE,
 163         LPC32XX_CLK_LCD_DIV,
 164         LPC32XX_CLK_LCD_GATE,
 165
 166         LPC32XX_CLK_HW_MAX,
 167         LPC32XX_CLK_MAX = LPC32XX_CLK_SYSCLK_ARM_MUX + 1,
 168         LPC32XX_CLK_CCF_MAX = LPC32XX_CLK_USB_AHB + 1,
 169 };
 170
 171 static struct clk *clk[LPC32XX_CLK_MAX];
 172 static struct clk_onecell_data clk_data = {
 173         .clks = clk,
 174         .clk_num = LPC32XX_CLK_MAX,
 175 };
 176
 177 static struct clk *usb_clk[LPC32XX_USB_CLK_MAX];
 178 static struct clk_onecell_data usb_clk_data = {
 179         .clks = usb_clk,
 180         .clk_num = LPC32XX_USB_CLK_MAX,
 181 };
 182
 183 #define LPC32XX_CLK_PARENTS_MAX                 5
 184
 185 struct clk_proto_t {
 186         const char *name;
 187         const u8 parents[LPC32XX_CLK_PARENTS_MAX];
 188         u8 num_parents;
 189         unsigned long flags;
 190 };
 191
 192 #define CLK_PREFIX(LITERAL)             LPC32XX_CLK_ ## LITERAL
 193 #define NUMARGS(...)    (sizeof((int[]){__VA_ARGS__})/sizeof(int))
 194
 195 #define LPC32XX_CLK_DEFINE(_idx, _name, _flags, ...)            \
 196         [CLK_PREFIX(_idx)] = {                                  \
 197                 .name = _name,                                  \
 198                 .flags = _flags,                                \
 199                 .parents = { __VA_ARGS__ },                     \
 200                 .num_parents = NUMARGS(__VA_ARGS__),            \
 201          }
 202
 203 static const struct clk_proto_t clk_proto[LPC32XX_CLK_CCF_MAX] __initconst = {
 204         LPC32XX_CLK_DEFINE(XTAL, "xtal", 0x0),
 205         LPC32XX_CLK_DEFINE(XTAL_32K, "xtal_32k", 0x0),
 206
 207         LPC32XX_CLK_DEFINE(RTC, "rtc", 0x0, LPC32XX_CLK_XTAL_32K),
 208         LPC32XX_CLK_DEFINE(OSC, "osc", CLK_IGNORE_UNUSED, LPC32XX_CLK_XTAL),
 209         LPC32XX_CLK_DEFINE(SYS, "sys", CLK_IGNORE_UNUSED,
 210                 LPC32XX_CLK_OSC, LPC32XX_CLK_PLL397X),
 211         LPC32XX_CLK_DEFINE(PLL397X, "pll_397x", CLK_IGNORE_UNUSED,
 212                 LPC32XX_CLK_RTC),
 213         LPC32XX_CLK_DEFINE(HCLK_PLL, "hclk_pll", CLK_IGNORE_UNUSED,
 214                 LPC32XX_CLK_SYS),
 215         LPC32XX_CLK_DEFINE(HCLK_DIV_PERIPH, "hclk_div_periph",
 216                 CLK_IGNORE_UNUSED, LPC32XX_CLK_HCLK_PLL),
 217         LPC32XX_CLK_DEFINE(HCLK_DIV, "hclk_div", CLK_IGNORE_UNUSED,
 218                 LPC32XX_CLK_HCLK_PLL),
 219         LPC32XX_CLK_DEFINE(HCLK, "hclk", CLK_IGNORE_UNUSED,
 220                 LPC32XX_CLK_PERIPH_HCLK_MUX),
 221         LPC32XX_CLK_DEFINE(PERIPH, "pclk", CLK_IGNORE_UNUSED,
 222                 LPC32XX_CLK_SYSCLK_PERIPH_MUX),
 223         LPC32XX_CLK_DEFINE(ARM, "arm", CLK_IGNORE_UNUSED,
 224                 LPC32XX_CLK_PERIPH_ARM_MUX),
 225
 226         LPC32XX_CLK_DEFINE(PERIPH_HCLK_MUX, "periph_hclk_mux",
 227                 CLK_IGNORE_UNUSED,
 228                 LPC32XX_CLK_SYSCLK_HCLK_MUX, LPC32XX_CLK_SYSCLK_PERIPH_MUX),
 229         LPC32XX_CLK_DEFINE(PERIPH_ARM_MUX, "periph_arm_mux", CLK_IGNORE_UNUSED,
 230                 LPC32XX_CLK_SYSCLK_ARM_MUX, LPC32XX_CLK_SYSCLK_PERIPH_MUX),
 231         LPC32XX_CLK_DEFINE(SYSCLK_PERIPH_MUX, "sysclk_periph_mux",
 232                 CLK_IGNORE_UNUSED,
 233                 LPC32XX_CLK_SYS, LPC32XX_CLK_HCLK_DIV_PERIPH),
 234         LPC32XX_CLK_DEFINE(SYSCLK_HCLK_MUX, "sysclk_hclk_mux",
 235                 CLK_IGNORE_UNUSED,
 236                 LPC32XX_CLK_SYS, LPC32XX_CLK_HCLK_DIV),
 237         LPC32XX_CLK_DEFINE(SYSCLK_ARM_MUX, "sysclk_arm_mux", CLK_IGNORE_UNUSED,
 238                 LPC32XX_CLK_SYS, LPC32XX_CLK_HCLK_PLL),
 239
 240         LPC32XX_CLK_DEFINE(ARM_VFP, "vfp9", CLK_IGNORE_UNUSED,
 241                 LPC32XX_CLK_ARM),
 242         LPC32XX_CLK_DEFINE(USB_PLL, "usb_pll",
 243                 CLK_SET_RATE_GATE | CLK_SET_RATE_PARENT, LPC32XX_CLK_USB_DIV),
 244         LPC32XX_CLK_DEFINE(USB_DIV, "usb_div", 0x0, LPC32XX_CLK_OSC),
 245         LPC32XX_CLK_DEFINE(USB, "usb", 0x0, LPC32XX_CLK_USB_PLL),
 246         LPC32XX_CLK_DEFINE(DMA, "dma", 0x0, LPC32XX_CLK_HCLK),
 247         LPC32XX_CLK_DEFINE(MLC, "mlc", 0x0, LPC32XX_CLK_HCLK),
 248         LPC32XX_CLK_DEFINE(SLC, "slc", 0x0, LPC32XX_CLK_HCLK),
 249         LPC32XX_CLK_DEFINE(LCD, "lcd", 0x0, LPC32XX_CLK_HCLK),
 250         LPC32XX_CLK_DEFINE(MAC, "mac", 0x0, LPC32XX_CLK_HCLK),
 251         LPC32XX_CLK_DEFINE(SD, "sd", 0x0, LPC32XX_CLK_ARM),
 252         LPC32XX_CLK_DEFINE(DDRAM, "ddram", CLK_GET_RATE_NOCACHE,
 253                 LPC32XX_CLK_SYSCLK_ARM_MUX),
 254         LPC32XX_CLK_DEFINE(SSP0, "ssp0", 0x0, LPC32XX_CLK_HCLK),
 255         LPC32XX_CLK_DEFINE(SSP1, "ssp1", 0x0, LPC32XX_CLK_HCLK),
 256
 257         /*
 258          * CLK_GET_RATE_NOCACHE is needed, if UART clock is disabled, its
 259          * divider register does not contain information about selected rate.
 260          */
 261         LPC32XX_CLK_DEFINE(UART3, "uart3", CLK_GET_RATE_NOCACHE,
 262                 LPC32XX_CLK_PERIPH, LPC32XX_CLK_HCLK),
 263         LPC32XX_CLK_DEFINE(UART4, "uart4", CLK_GET_RATE_NOCACHE,
 264                 LPC32XX_CLK_PERIPH, LPC32XX_CLK_HCLK),
 265         LPC32XX_CLK_DEFINE(UART5, "uart5", CLK_GET_RATE_NOCACHE,
 266                 LPC32XX_CLK_PERIPH, LPC32XX_CLK_HCLK),
 267         LPC32XX_CLK_DEFINE(UART6, "uart6", CLK_GET_RATE_NOCACHE,
 268                 LPC32XX_CLK_PERIPH, LPC32XX_CLK_HCLK),
 269         LPC32XX_CLK_DEFINE(IRDA, "irda", 0x0, LPC32XX_CLK_PERIPH),
 270         LPC32XX_CLK_DEFINE(I2C1, "i2c1", 0x0, LPC32XX_CLK_HCLK),
 271         LPC32XX_CLK_DEFINE(I2C2, "i2c2", 0x0, LPC32XX_CLK_HCLK),
 272         LPC32XX_CLK_DEFINE(TIMER0, "timer0", 0x0, LPC32XX_CLK_PERIPH),
 273         LPC32XX_CLK_DEFINE(TIMER1, "timer1", 0x0, LPC32XX_CLK_PERIPH),
 274         LPC32XX_CLK_DEFINE(TIMER2, "timer2", 0x0, LPC32XX_CLK_PERIPH),
 275         LPC32XX_CLK_DEFINE(TIMER3, "timer3", 0x0, LPC32XX_CLK_PERIPH),
 276         LPC32XX_CLK_DEFINE(TIMER4, "timer4", 0x0, LPC32XX_CLK_PERIPH),
 277         LPC32XX_CLK_DEFINE(TIMER5, "timer5", 0x0, LPC32XX_CLK_PERIPH),
 278         LPC32XX_CLK_DEFINE(WDOG, "watchdog", 0x0, LPC32XX_CLK_PERIPH),
 279         LPC32XX_CLK_DEFINE(I2S0, "i2s0", 0x0, LPC32XX_CLK_HCLK),
 280         LPC32XX_CLK_DEFINE(I2S1, "i2s1", 0x0, LPC32XX_CLK_HCLK),
 281         LPC32XX_CLK_DEFINE(SPI1, "spi1", 0x0, LPC32XX_CLK_HCLK),
 282         LPC32XX_CLK_DEFINE(SPI2, "spi2", 0x0, LPC32XX_CLK_HCLK),
 283         LPC32XX_CLK_DEFINE(MCPWM, "mcpwm", 0x0, LPC32XX_CLK_HCLK),
 284         LPC32XX_CLK_DEFINE(HSTIMER, "hstimer", 0x0, LPC32XX_CLK_PERIPH),
 285         LPC32XX_CLK_DEFINE(KEY, "key", 0x0, LPC32XX_CLK_RTC),
 286         LPC32XX_CLK_DEFINE(PWM1, "pwm1", 0x0,
 287                 LPC32XX_CLK_RTC, LPC32XX_CLK_PERIPH),
 288         LPC32XX_CLK_DEFINE(PWM2, "pwm2", 0x0,
 289                 LPC32XX_CLK_RTC, LPC32XX_CLK_PERIPH),
 290         LPC32XX_CLK_DEFINE(ADC, "adc", 0x0,
 291                 LPC32XX_CLK_ADC_RTC, LPC32XX_CLK_ADC_DIV),
 292         LPC32XX_CLK_DEFINE(ADC_DIV, "adc_div", 0x0, LPC32XX_CLK_PERIPH),
 293         LPC32XX_CLK_DEFINE(ADC_RTC, "adc_rtc", 0x0, LPC32XX_CLK_RTC),
 294         LPC32XX_CLK_DEFINE(TEST1, "test1", 0x0,
 295                 LPC32XX_CLK_PERIPH, LPC32XX_CLK_RTC, LPC32XX_CLK_OSC),
 296         LPC32XX_CLK_DEFINE(TEST2, "test2", 0x0,
 297                 LPC32XX_CLK_HCLK, LPC32XX_CLK_PERIPH, LPC32XX_CLK_USB,
 298                 LPC32XX_CLK_OSC, LPC32XX_CLK_PLL397X),
 299
 300         /* USB controller clocks */
 301         LPC32XX_CLK_DEFINE(USB_AHB, "usb_ahb", 0x0, LPC32XX_CLK_USB),
 302         LPC32XX_CLK_DEFINE(USB_OTG, "usb_otg", 0x0, LPC32XX_CLK_USB_AHB),
 303         LPC32XX_CLK_DEFINE(USB_I2C, "usb_i2c", 0x0, LPC32XX_CLK_USB_AHB),
 304         LPC32XX_CLK_DEFINE(USB_DEV, "usb_dev", 0x0, LPC32XX_CLK_USB_OTG),
 305         LPC32XX_CLK_DEFINE(USB_HOST, "usb_host", 0x0, LPC32XX_CLK_USB_OTG),
 306 };
 307
 308 struct lpc32xx_clk {
 309         struct clk_hw hw;
 310         u32 reg;
 311         u32 enable;
 312         u32 enable_mask;
 313         u32 disable;
 314         u32 disable_mask;
 315         u32 busy;
 316         u32 busy_mask;
 317 };
 318
 319 enum clk_pll_mode {
 320         PLL_UNKNOWN,
 321         PLL_DIRECT,
 322         PLL_BYPASS,
 323         PLL_DIRECT_BYPASS,
 324         PLL_INTEGER,
 325         PLL_NON_INTEGER,
 326 };
 327
 328 struct lpc32xx_pll_clk {
 329         struct clk_hw hw;
 330         u32 reg;
 331         u32 enable;
 332         unsigned long m_div;
 333         unsigned long n_div;
 334         unsigned long p_div;
 335         enum clk_pll_mode mode;
 336 };
 337
 338 struct lpc32xx_usb_clk {
 339         struct clk_hw hw;
 340         u32 ctrl_enable;
 341         u32 ctrl_disable;
 342         u32 ctrl_mask;
 343         u32 enable;
 344         u32 busy;
 345 };
 346
 347 struct lpc32xx_clk_mux {
 348         struct clk_hw   hw;
 349         u32             reg;
 350         u32             mask;
 351         u8              shift;
 352         u32             *table;
 353         u8              flags;
 354 };
 355
 356 struct lpc32xx_clk_div {
 357         struct clk_hw   hw;
 358         u32             reg;
 359         u8              shift;
 360         u8              width;
 361         const struct clk_div_table      *table;
 362         u8              flags;
 363 };
 364
 365 struct lpc32xx_clk_gate {
 366         struct clk_hw   hw;
 367         u32             reg;
 368         u8              bit_idx;
 369         u8              flags;
 370 };
 371
 372 #define to_lpc32xx_clk(_hw)     container_of(_hw, struct lpc32xx_clk, hw)
 373 #define to_lpc32xx_pll_clk(_hw) container_of(_hw, struct lpc32xx_pll_clk, hw)
 374 #define to_lpc32xx_usb_clk(_hw) container_of(_hw, struct lpc32xx_usb_clk, hw)
 375 #define to_lpc32xx_mux(_hw)     container_of(_hw, struct lpc32xx_clk_mux, hw)
 376 #define to_lpc32xx_div(_hw)     container_of(_hw, struct lpc32xx_clk_div, hw)
 377 #define to_lpc32xx_gate(_hw)    container_of(_hw, struct lpc32xx_clk_gate, hw)
 378
 379 static inline bool pll_is_valid(u64 val0, u64 val1, u64 min, u64 max)
 380 {
 381         return (val0 >= (val1 * min) && val0 <= (val1 * max));
 382 }
 383
 384 static inline u32 lpc32xx_usb_clk_read(struct lpc32xx_usb_clk *clk)
 385 {
 386         return readl(usb_clk_vbase + LPC32XX_USB_CLK_STS);
 387 }
 388
 389 static inline void lpc32xx_usb_clk_write(struct lpc32xx_usb_clk *clk, u32 val)
 390 {
 391         writel(val, usb_clk_vbase + LPC32XX_USB_CLK_CTRL);
 392 }
 393
 394 static int clk_mask_enable(struct clk_hw *hw)
 395 {
 396         struct lpc32xx_clk *clk = to_lpc32xx_clk(hw);
 397         u32 val;
 398
 399         regmap_read(clk_regmap, clk->reg, &val);
 400
 401         if (clk->busy_mask && (val & clk->busy_mask) == clk->busy)
 402                 return -EBUSY;
 403
 404         return regmap_update_bits(clk_regmap, clk->reg,
 405                                   clk->enable_mask, clk->enable);
 406 }
 407
 408 static void clk_mask_disable(struct clk_hw *hw)
 409 {
 410         struct lpc32xx_clk *clk = to_lpc32xx_clk(hw);
 411
 412         regmap_update_bits(clk_regmap, clk->reg,
 413                            clk->disable_mask, clk->disable);
 414 }
 415
 416 static int clk_mask_is_enabled(struct clk_hw *hw)
 417 {
 418         struct lpc32xx_clk *clk = to_lpc32xx_clk(hw);
 419         u32 val;
 420
 421         regmap_read(clk_regmap, clk->reg, &val);
 422
 423         return ((val & clk->enable_mask) == clk->enable);
 424 }
 425
 426 static const struct clk_ops clk_mask_ops = {
 427         .enable = clk_mask_enable,
 428         .disable = clk_mask_disable,
 429         .is_enabled = clk_mask_is_enabled,
 430 };
 431
 432 static int clk_pll_enable(struct clk_hw *hw)
 433 {
 434         struct lpc32xx_pll_clk *clk = to_lpc32xx_pll_clk(hw);
 435         u32 val, count;
 436
 437         regmap_update_bits(clk_regmap, clk->reg, clk->enable, clk->enable);
 438
 439         for (count = 0; count < 1000; count++) {
 440                 regmap_read(clk_regmap, clk->reg, &val);
 441                 if (val & PLL_CTRL_LOCK)
 442                         break;
 443         }
 444
 445         if (val & PLL_CTRL_LOCK)
 446                 return 0;
 447
 448         return -ETIMEDOUT;
 449 }
 450
 451 static void clk_pll_disable(struct clk_hw *hw)
 452 {
 453         struct lpc32xx_pll_clk *clk = to_lpc32xx_pll_clk(hw);
 454
 455         regmap_update_bits(clk_regmap, clk->reg, clk->enable, 0x0);
 456 }
 457
 458 static int clk_pll_is_enabled(struct clk_hw *hw)
 459 {
 460         struct lpc32xx_pll_clk *clk = to_lpc32xx_pll_clk(hw);
 461         u32 val;
 462
 463         regmap_read(clk_regmap, clk->reg, &val);
 464
 465         val &= clk->enable | PLL_CTRL_LOCK;
 466         if (val == (clk->enable | PLL_CTRL_LOCK))
 467                 return 1;
 468
 469         return 0;
 470 }
 471
 472 static unsigned long clk_pll_397x_recalc_rate(struct clk_hw *hw,
 473                                               unsigned long parent_rate)
 474 {
 475         return parent_rate * 397;
 476 }
 477
 478 static unsigned long clk_pll_recalc_rate(struct clk_hw *hw,
 479                                          unsigned long parent_rate)
 480 {
 481         struct lpc32xx_pll_clk *clk = to_lpc32xx_pll_clk(hw);
 482         bool is_direct, is_bypass, is_feedback;
 483         unsigned long rate, cco_rate, ref_rate;
 484         u32 val;
 485
 486         regmap_read(clk_regmap, clk->reg, &val);
 487         is_direct = val & PLL_CTRL_DIRECT;
 488         is_bypass = val & PLL_CTRL_BYPASS;
 489         is_feedback = val & PLL_CTRL_FEEDBACK;
 490
 491         clk->m_div = ((val & PLL_CTRL_FEEDDIV) >> 1) + 1;
 492         clk->n_div = ((val & PLL_CTRL_PREDIV) >> 9) + 1;
 493         clk->p_div = ((val & PLL_CTRL_POSTDIV) >> 11) + 1;
 494
 495         if (is_direct && is_bypass) {
 496                 clk->p_div = 0;
 497                 clk->mode = PLL_DIRECT_BYPASS;
 498                 return parent_rate;
 499         }
 500         if (is_bypass) {
 501                 clk->mode = PLL_BYPASS;
 502                 return parent_rate / (1 << clk->p_div);
 503         }
 504         if (is_direct) {
 505                 clk->p_div = 0;
 506                 clk->mode = PLL_DIRECT;
 507         }
 508
 509         ref_rate = parent_rate / clk->n_div;
 510         rate = cco_rate = ref_rate * clk->m_div;
 511
 512         if (!is_direct) {
 513                 if (is_feedback) {
 514                         cco_rate *= (1 << clk->p_div);
 515                         clk->mode = PLL_INTEGER;
 516                 } else {
 517                         rate /= (1 << clk->p_div);
 518                         clk->mode = PLL_NON_INTEGER;
 519                 }
 520         }
 521
 522         pr_debug("%s: %lu: 0x%x: %d/%d/%d, %lu/%lu/%d => %lu\n",
 523                  clk_hw_get_name(hw),
 524                  parent_rate, val, is_direct, is_bypass, is_feedback,
 525                  clk->n_div, clk->m_div, (1 << clk->p_div), rate);
 526
 527         if (clk_pll_is_enabled(hw) &&
 528             !(pll_is_valid(parent_rate, 1, 1000000, 20000000)
 529               && pll_is_valid(cco_rate, 1, 156000000, 320000000)
 530               && pll_is_valid(ref_rate, 1, 1000000, 27000000)))
 531                 pr_err("%s: PLL clocks are not in valid ranges: %lu/%lu/%lu\n",
 532                        clk_hw_get_name(hw),
 533                        parent_rate, cco_rate, ref_rate);
 534
 535         return rate;
 536 }
 537
 538 static int clk_pll_set_rate(struct clk_hw *hw, unsigned long rate,
 539                             unsigned long parent_rate)
 540 {
 541         struct lpc32xx_pll_clk *clk = to_lpc32xx_pll_clk(hw);
 542         u32 val;
 543         unsigned long new_rate;
 544
 545         /* Validate PLL clock parameters computed on round rate stage */
 546         switch (clk->mode) {
 547         case PLL_DIRECT:
 548                 val = PLL_CTRL_DIRECT;
 549                 val |= (clk->m_div - 1) << 1;
 550                 val |= (clk->n_div - 1) << 9;
 551                 new_rate = (parent_rate * clk->m_div) / clk->n_div;
 552                 break;
 553         case PLL_BYPASS:
 554                 val = PLL_CTRL_BYPASS;
 555                 val |= (clk->p_div - 1) << 11;
 556                 new_rate = parent_rate / (1 << (clk->p_div));
 557                 break;
 558         case PLL_DIRECT_BYPASS:
 559                 val = PLL_CTRL_DIRECT | PLL_CTRL_BYPASS;
 560                 new_rate = parent_rate;
 561                 break;
 562         case PLL_INTEGER:
 563                 val = PLL_CTRL_FEEDBACK;
 564                 val |= (clk->m_div - 1) << 1;
 565                 val |= (clk->n_div - 1) << 9;
 566                 val |= (clk->p_div - 1) << 11;
 567                 new_rate = (parent_rate * clk->m_div) / clk->n_div;
 568                 break;
 569         case PLL_NON_INTEGER:
 570                 val = 0x0;
 571                 val |= (clk->m_div - 1) << 1;
 572                 val |= (clk->n_div - 1) << 9;
 573                 val |= (clk->p_div - 1) << 11;
 574                 new_rate = (parent_rate * clk->m_div) /
 575                                 (clk->n_div * (1 << clk->p_div));
 576                 break;
 577         default:
 578                 return -EINVAL;
 579         }
 580
 581         /* Sanity check that round rate is equal to the requested one */
 582         if (new_rate != rate)
 583                 return -EINVAL;
 584
 585         return regmap_update_bits(clk_regmap, clk->reg, 0x1FFFF, val);
 586 }
 587
 588 static long clk_hclk_pll_round_rate(struct clk_hw *hw, unsigned long rate,
 589                                     unsigned long *parent_rate)
 590 {
 591         struct lpc32xx_pll_clk *clk = to_lpc32xx_pll_clk(hw);
 592         u64 m_i, o = rate, i = *parent_rate, d = (u64)rate << 6;
 593         u64 m = 0, n = 0, p = 0;
 594         int p_i, n_i;
 595
 596         pr_debug("%s: %lu/%lu\n", clk_hw_get_name(hw), *parent_rate, rate);
 597
 598         if (rate > 266500000)
 599                 return -EINVAL;
 600
 601         /* Have to check all 20 possibilities to find the minimal M */
 602         for (p_i = 4; p_i >= 0; p_i--) {
 603                 for (n_i = 4; n_i > 0; n_i--) {
 604                         m_i = div64_u64(o * n_i * (1 << p_i), i);
 605
 606                         /* Check for valid PLL parameter constraints */
 607                         if (!(m_i && m_i <= 256
 608                               && pll_is_valid(i, n_i, 1000000, 27000000)
 609                               && pll_is_valid(i * m_i * (1 << p_i), n_i,
 610                                               156000000, 320000000)))
 611                                 continue;
 612
 613                         /* Store some intermediate valid parameters */
 614                         if (o * n_i * (1 << p_i) - i * m_i <= d) {
 615                                 m = m_i;
 616                                 n = n_i;
 617                                 p = p_i;
 618                                 d = o * n_i * (1 << p_i) - i * m_i;
 619                         }
 620                 }
 621         }
 622
 623         if (d == (u64)rate << 6) {
 624                 pr_err("%s: %lu: no valid PLL parameters are found\n",
 625                        clk_hw_get_name(hw), rate);
 626                 return -EINVAL;
 627         }
 628
 629         clk->m_div = m;
 630         clk->n_div = n;
 631         clk->p_div = p;
 632
 633         /* Set only direct or non-integer mode of PLL */
 634         if (!p)
 635                 clk->mode = PLL_DIRECT;
 636         else
 637                 clk->mode = PLL_NON_INTEGER;
 638
 639         o = div64_u64(i * m, n * (1 << p));
 640
 641         if (!d)
 642                 pr_debug("%s: %lu: found exact match: %llu/%llu/%llu\n",
 643                          clk_hw_get_name(hw), rate, m, n, p);
 644         else
 645                 pr_debug("%s: %lu: found closest: %llu/%llu/%llu - %llu\n",
 646                          clk_hw_get_name(hw), rate, m, n, p, o);
 647
 648         return o;
 649 }
 650
 651 static long clk_usb_pll_round_rate(struct clk_hw *hw, unsigned long rate,
 652                                    unsigned long *parent_rate)
 653 {
 654         struct lpc32xx_pll_clk *clk = to_lpc32xx_pll_clk(hw);
 655         struct clk_hw *usb_div_hw, *osc_hw;
 656         u64 d_i, n_i, m, o;
 657
 658         pr_debug("%s: %lu/%lu\n", clk_hw_get_name(hw), *parent_rate, rate);
 659
 660         /*
 661          * The only supported USB clock is 48MHz, with PLL internal constraints
 662          * on Fclkin, Fcco and Fref this implies that Fcco must be 192MHz
 663          * and post-divider must be 4, this slightly simplifies calculation of
 664          * USB divider, USB PLL N and M parameters.
 665          */
 666         if (rate != 48000000)
 667                 return -EINVAL;
 668
 669         /* USB divider clock */
 670         usb_div_hw = clk_hw_get_parent_by_index(hw, 0);
 671         if (!usb_div_hw)
 672                 return -EINVAL;
 673
 674         /* Main oscillator clock */
 675         osc_hw = clk_hw_get_parent_by_index(usb_div_hw, 0);
 676         if (!osc_hw)
 677                 return -EINVAL;
 678         o = clk_hw_get_rate(osc_hw);    /* must be in range 1..20 MHz */
 679
 680         /* Check if valid USB divider and USB PLL parameters exists */
 681         for (d_i = 16; d_i >= 1; d_i--) {
 682                 for (n_i = 1; n_i <= 4; n_i++) {
 683                         m = div64_u64(192000000 * d_i * n_i, o);
 684                         if (!(m && m <= 256
 685                               && m * o == 192000000 * d_i * n_i
 686                               && pll_is_valid(o, d_i, 1000000, 20000000)
 687                               && pll_is_valid(o, d_i * n_i, 1000000, 27000000)))
 688                                 continue;
 689
 690                         clk->n_div = n_i;
 691                         clk->m_div = m;
 692                         clk->p_div = 2;
 693                         clk->mode = PLL_NON_INTEGER;
 694                         *parent_rate = div64_u64(o, d_i);
 695
 696                         return rate;
 697                 }
 698         }
 699
 700         return -EINVAL;
 701 }
 702
 703 #define LPC32XX_DEFINE_PLL_OPS(_name, _rc, _sr, _rr)                    \
 704         static const struct clk_ops clk_ ##_name ## _ops = {            \
 705                 .enable = clk_pll_enable,                               \
 706                 .disable = clk_pll_disable,                             \
 707                 .is_enabled = clk_pll_is_enabled,                       \
 708                 .recalc_rate = _rc,                                     \
 709                 .set_rate = _sr,                                        \
 710                 .round_rate = _rr,                                      \
 711         }
 712
 713 LPC32XX_DEFINE_PLL_OPS(pll_397x, clk_pll_397x_recalc_rate, NULL, NULL);
 714 LPC32XX_DEFINE_PLL_OPS(hclk_pll, clk_pll_recalc_rate,
 715                        clk_pll_set_rate, clk_hclk_pll_round_rate);
 716 LPC32XX_DEFINE_PLL_OPS(usb_pll,  clk_pll_recalc_rate,
 717                        clk_pll_set_rate, clk_usb_pll_round_rate);
 718
 719 static int clk_ddram_is_enabled(struct clk_hw *hw)
 720 {
 721         struct lpc32xx_clk *clk = to_lpc32xx_clk(hw);
 722         u32 val;
 723
 724         regmap_read(clk_regmap, clk->reg, &val);
 725         val &= clk->enable_mask | clk->busy_mask;
 726
 727         return (val == (BIT(7) | BIT(0)) ||
 728                 val == (BIT(8) | BIT(1)));
 729 }
 730
 731 static int clk_ddram_enable(struct clk_hw *hw)
 732 {
 733         struct lpc32xx_clk *clk = to_lpc32xx_clk(hw);
 734         u32 val, hclk_div;
 735
 736         regmap_read(clk_regmap, clk->reg, &val);
 737         hclk_div = val & clk->busy_mask;
 738
 739         /*
 740          * DDRAM clock must be 2 times higher than HCLK,
 741          * this implies DDRAM clock can not be enabled,
 742          * if HCLK clock rate is equal to ARM clock rate
 743          */
 744         if (hclk_div == 0x0 || hclk_div == (BIT(1) | BIT(0)))
 745                 return -EINVAL;
 746
 747         return regmap_update_bits(clk_regmap, clk->reg,
 748                                   clk->enable_mask, hclk_div << 7);
 749 }
 750
 751 static unsigned long clk_ddram_recalc_rate(struct clk_hw *hw,
 752                                            unsigned long parent_rate)
 753 {
 754         struct lpc32xx_clk *clk = to_lpc32xx_clk(hw);
 755         u32 val;
 756
 757         if (!clk_ddram_is_enabled(hw))
 758                 return 0;
 759
 760         regmap_read(clk_regmap, clk->reg, &val);
 761         val &= clk->enable_mask;
 762
 763         return parent_rate / (val >> 7);
 764 }
 765
 766 static const struct clk_ops clk_ddram_ops = {
 767         .enable = clk_ddram_enable,
 768         .disable = clk_mask_disable,
 769         .is_enabled = clk_ddram_is_enabled,
 770         .recalc_rate = clk_ddram_recalc_rate,
 771 };
 772
 773 static unsigned long lpc32xx_clk_uart_recalc_rate(struct clk_hw *hw,
 774                                                   unsigned long parent_rate)
 775 {
 776         struct lpc32xx_clk *clk = to_lpc32xx_clk(hw);
 777         u32 val, x, y;
 778
 779         regmap_read(clk_regmap, clk->reg, &val);
 780         x = (val & 0xFF00) >> 8;
 781         y = val & 0xFF;
 782
 783         if (x && y)
 784                 return (parent_rate * x) / y;
 785         else
 786                 return 0;
 787 }
 788
 789 static const struct clk_ops lpc32xx_uart_div_ops = {
 790         .recalc_rate = lpc32xx_clk_uart_recalc_rate,
 791 };
 792
 793 static const struct clk_div_table clk_hclk_div_table[] = {
 794         { .val = 0, .div = 1 },
 795         { .val = 1, .div = 2 },
 796         { .val = 2, .div = 4 },
 797         { },
 798 };
 799
 800 static u32 test1_mux_table[] = { 0, 1, 2, };
 801 static u32 test2_mux_table[] = { 0, 1, 2, 5, 7, };
 802
 803 static int clk_usb_enable(struct clk_hw *hw)
 804 {
 805         struct lpc32xx_usb_clk *clk = to_lpc32xx_usb_clk(hw);
 806         u32 val, ctrl_val, count;
 807
 808         pr_debug("%s: 0x%x\n", clk_hw_get_name(hw), clk->enable);
 809
 810         if (clk->ctrl_mask) {
 811                 regmap_read(clk_regmap, LPC32XX_CLKPWR_USB_CTRL, &ctrl_val);
 812                 regmap_update_bits(clk_regmap, LPC32XX_CLKPWR_USB_CTRL,
 813                                    clk->ctrl_mask, clk->ctrl_enable);
 814         }
 815
 816         val = lpc32xx_usb_clk_read(clk);
 817         if (clk->busy && (val & clk->busy) == clk->busy) {
 818                 if (clk->ctrl_mask)
 819                         regmap_write(clk_regmap, LPC32XX_CLKPWR_USB_CTRL,
 820                                      ctrl_val);
 821                 return -EBUSY;
 822         }
 823
 824         val |= clk->enable;
 825         lpc32xx_usb_clk_write(clk, val);
 826
 827         for (count = 0; count < 1000; count++) {
 828                 val = lpc32xx_usb_clk_read(clk);
 829                 if ((val & clk->enable) == clk->enable)
 830                         break;
 831         }
 832
 833         if ((val & clk->enable) == clk->enable)
 834                 return 0;
 835
 836         if (clk->ctrl_mask)
 837                 regmap_write(clk_regmap, LPC32XX_CLKPWR_USB_CTRL, ctrl_val);
 838
 839         return -ETIMEDOUT;
 840 }
 841
 842 static void clk_usb_disable(struct clk_hw *hw)
 843 {
 844         struct lpc32xx_usb_clk *clk = to_lpc32xx_usb_clk(hw);
 845         u32 val = lpc32xx_usb_clk_read(clk);
 846
 847         val &= ~clk->enable;
 848         lpc32xx_usb_clk_write(clk, val);
 849
 850         if (clk->ctrl_mask)
 851                 regmap_update_bits(clk_regmap, LPC32XX_CLKPWR_USB_CTRL,
 852                                    clk->ctrl_mask, clk->ctrl_disable);
 853 }
 854
 855 static int clk_usb_is_enabled(struct clk_hw *hw)
 856 {
 857         struct lpc32xx_usb_clk *clk = to_lpc32xx_usb_clk(hw);
 858         u32 ctrl_val, val;
 859
 860         if (clk->ctrl_mask) {
 861                 regmap_read(clk_regmap, LPC32XX_CLKPWR_USB_CTRL, &ctrl_val);
 862                 if ((ctrl_val & clk->ctrl_mask) != clk->ctrl_enable)
 863                         return 0;
 864         }
 865
 866         val = lpc32xx_usb_clk_read(clk);
 867
 868         return ((val & clk->enable) == clk->enable);
 869 }
 870
 871 static unsigned long clk_usb_i2c_recalc_rate(struct clk_hw *hw,
 872                                              unsigned long parent_rate)
 873 {
 874         return clk_get_rate(clk[LPC32XX_CLK_PERIPH]);
 875 }
 876
 877 static const struct clk_ops clk_usb_ops = {
 878         .enable = clk_usb_enable,
 879         .disable = clk_usb_disable,
 880         .is_enabled = clk_usb_is_enabled,
 881 };
 882
 883 static const struct clk_ops clk_usb_i2c_ops = {
 884         .enable = clk_usb_enable,
 885         .disable = clk_usb_disable,
 886         .is_enabled = clk_usb_is_enabled,
 887         .recalc_rate = clk_usb_i2c_recalc_rate,
 888 };
 889
 890 static int lpc32xx_clk_gate_enable(struct clk_hw *hw)
 891 {
 892         struct lpc32xx_clk_gate *clk = to_lpc32xx_gate(hw);
 893         u32 mask = BIT(clk->bit_idx);
 894         u32 val = (clk->flags & CLK_GATE_SET_TO_DISABLE ? 0x0 : mask);
 895
 896         return regmap_update_bits(clk_regmap, clk->reg, mask, val);
 897 }
 898
 899 static void lpc32xx_clk_gate_disable(struct clk_hw *hw)
 900 {
 901         struct lpc32xx_clk_gate *clk = to_lpc32xx_gate(hw);
 902         u32 mask = BIT(clk->bit_idx);
 903         u32 val = (clk->flags & CLK_GATE_SET_TO_DISABLE ? mask : 0x0);
 904
 905         regmap_update_bits(clk_regmap, clk->reg, mask, val);
 906 }
 907
 908 static int lpc32xx_clk_gate_is_enabled(struct clk_hw *hw)
 909 {
 910         struct lpc32xx_clk_gate *clk = to_lpc32xx_gate(hw);
 911         u32 val;
 912         bool is_set;
 913
 914         regmap_read(clk_regmap, clk->reg, &val);
 915         is_set = val & BIT(clk->bit_idx);
 916
 917         return (clk->flags & CLK_GATE_SET_TO_DISABLE ? !is_set : is_set);
 918 }
 919
 920 static const struct clk_ops lpc32xx_clk_gate_ops = {
 921         .enable = lpc32xx_clk_gate_enable,
 922         .disable = lpc32xx_clk_gate_disable,
 923         .is_enabled = lpc32xx_clk_gate_is_enabled,
 924 };
 925
 926 #define div_mask(width) ((1 << (width)) - 1)
 927
 928 static unsigned int _get_table_div(const struct clk_div_table *table,
 929                                                         unsigned int val)
 930 {
 931         const struct clk_div_table *clkt;
 932
 933         for (clkt = table; clkt->div; clkt++)
 934                 if (clkt->val == val)
 935                         return clkt->div;
 936         return 0;
 937 }
 938
 939 static unsigned int _get_div(const struct clk_div_table *table,
 940                              unsigned int val, unsigned long flags, u8 width)
 941 {
 942         if (flags & CLK_DIVIDER_ONE_BASED)
 943                 return val;
 944         if (table)
 945                 return _get_table_div(table, val);
 946         return val + 1;
 947 }
 948
 949 static unsigned long clk_divider_recalc_rate(struct clk_hw *hw,
 950                 unsigned long parent_rate)
 951 {
 952         struct lpc32xx_clk_div *divider = to_lpc32xx_div(hw);
 953         unsigned int val;
 954
 955         regmap_read(clk_regmap, divider->reg, &val);
 956
 957         val >>= divider->shift;
 958         val &= div_mask(divider->width);
 959
 960         return divider_recalc_rate(hw, parent_rate, val, divider->table,
 961                                    divider->flags, divider->width);
 962 }
 963
 964 static long clk_divider_round_rate(struct clk_hw *hw, unsigned long rate,
 965                                 unsigned long *prate)
 966 {
 967         struct lpc32xx_clk_div *divider = to_lpc32xx_div(hw);
 968         unsigned int bestdiv;
 969
 970         /* if read only, just return current value */
 971         if (divider->flags & CLK_DIVIDER_READ_ONLY) {
 972                 regmap_read(clk_regmap, divider->reg, &bestdiv);
 973                 bestdiv >>= divider->shift;
 974                 bestdiv &= div_mask(divider->width);
 975                 bestdiv = _get_div(divider->table, bestdiv, divider->flags,
 976                         divider->width);
 977                 return DIV_ROUND_UP(*prate, bestdiv);
 978         }
 979
 980         return divider_round_rate(hw, rate, prate, divider->table,
 981                                   divider->width, divider->flags);
 982 }
 983
 984 static int clk_divider_set_rate(struct clk_hw *hw, unsigned long rate,
 985                                 unsigned long parent_rate)
 986 {
 987         struct lpc32xx_clk_div *divider = to_lpc32xx_div(hw);
 988         unsigned int value;
 989
 990         value = divider_get_val(rate, parent_rate, divider->table,
 991                                 divider->width, divider->flags);
 992
 993         return regmap_update_bits(clk_regmap, divider->reg,
 994                                   div_mask(divider->width) << divider->shift,
 995                                   value << divider->shift);
 996 }
 997
 998 static const struct clk_ops lpc32xx_clk_divider_ops = {
 999         .recalc_rate = clk_divider_recalc_rate,
1000         .round_rate = clk_divider_round_rate,
1001         .set_rate = clk_divider_set_rate,
1002 };
1003
1004 static u8 clk_mux_get_parent(struct clk_hw *hw)
1005 {
1006         struct lpc32xx_clk_mux *mux = to_lpc32xx_mux(hw);
1007         u32 num_parents = clk_hw_get_num_parents(hw);
1008         u32 val;
1009
1010         regmap_read(clk_regmap, mux->reg, &val);
1011         val >>= mux->shift;
1012         val &= mux->mask;
1013
1014         if (mux->table) {
1015                 u32 i;
1016
1017                 for (i = 0; i < num_parents; i++)
1018                         if (mux->table[i] == val)
1019                                 return i;
1020                 return -EINVAL;
1021         }
1022
1023         if (val >= num_parents)
1024                 return -EINVAL;
1025
1026         return val;
1027 }
1028
1029 static int clk_mux_set_parent(struct clk_hw *hw, u8 index)
1030 {
1031         struct lpc32xx_clk_mux *mux = to_lpc32xx_mux(hw);
1032
1033         if (mux->table)
1034                 index = mux->table[index];
1035
1036         return regmap_update_bits(clk_regmap, mux->reg,
1037                           mux->mask << mux->shift, index << mux->shift);
1038 }
1039
1040 static const struct clk_ops lpc32xx_clk_mux_ro_ops = {
1041         .get_parent = clk_mux_get_parent,
1042 };
1043
1044 static const struct clk_ops lpc32xx_clk_mux_ops = {
1045         .get_parent = clk_mux_get_parent,
1046         .set_parent = clk_mux_set_parent,
1047         .determine_rate = __clk_mux_determine_rate,
1048 };
1049
1050 enum lpc32xx_clk_type {
1051         CLK_FIXED,
1052         CLK_MUX,
1053         CLK_DIV,
1054         CLK_GATE,
1055         CLK_COMPOSITE,
1056         CLK_LPC32XX,
1057         CLK_LPC32XX_PLL,
1058         CLK_LPC32XX_USB,
1059 };
1060
1061 struct clk_hw_proto0 {
1062         const struct clk_ops *ops;
1063         union {
1064                 struct lpc32xx_pll_clk pll;
1065                 struct lpc32xx_clk clk;
1066                 struct lpc32xx_usb_clk usb_clk;
1067                 struct lpc32xx_clk_mux mux;
1068                 struct lpc32xx_clk_div div;
1069                 struct lpc32xx_clk_gate gate;
1070         };
1071 };
1072
1073 struct clk_hw_proto1 {
1074         struct clk_hw_proto0 *mux;
1075         struct clk_hw_proto0 *div;
1076         struct clk_hw_proto0 *gate;
1077 };
1078
1079 struct clk_hw_proto {
1080         enum lpc32xx_clk_type type;
1081
1082         union {
1083                 struct clk_fixed_rate f;
1084                 struct clk_hw_proto0 hw0;
1085                 struct clk_hw_proto1 hw1;
1086         };
1087 };
1088
1089 #define LPC32XX_DEFINE_FIXED(_idx, _rate)                       \
1090 [CLK_PREFIX(_idx)] = {                                                  \
1091         .type = CLK_FIXED,                                              \
1092         {                                                               \
1093                 .f = {                                                  \
1094                         .fixed_rate = (_rate),                          \
1095                 },                                                      \
1096         },                                                              \
1097 }
1098
1099 #define LPC32XX_DEFINE_PLL(_idx, _name, _reg, _enable)                  \
1100 [CLK_PREFIX(_idx)] = {                                                  \
1101         .type = CLK_LPC32XX_PLL,                                        \
1102         {                                                               \
1103                 .hw0 = {                                                \
1104                         .ops = &clk_ ##_name ## _ops,                   \
1105                         {                                               \
1106                                 .pll = {                                \
1107                                         .reg = LPC32XX_CLKPWR_ ## _reg, \
1108                                         .enable = (_enable),            \
1109                                 },                                      \
1110                         },                                              \
1111                 },                                                      \
1112         },                                                              \
1113 }
1114
1115 #define LPC32XX_DEFINE_MUX(_idx, _reg, _shift, _mask, _table, _flags)   \
1116 [CLK_PREFIX(_idx)] = {                                                  \
1117         .type = CLK_MUX,                                                \
1118         {                                                               \
1119                 .hw0 = {                                                \
1120                         .ops = (_flags & CLK_MUX_READ_ONLY ?            \
1121                                 &lpc32xx_clk_mux_ro_ops :               \
1122                                 &lpc32xx_clk_mux_ops),                  \
1123                         {                                               \
1124                                 .mux = {                                \
1125                                         .reg = LPC32XX_CLKPWR_ ## _reg, \
1126                                         .mask = (_mask),                \
1127                                         .shift = (_shift),              \
1128                                         .table = (_table),              \
1129                                         .flags = (_flags),              \
1130                                 },                                      \
1131                         },                                              \
1132                 },                                                      \
1133         },                                                              \
1134 }
1135
1136 #define LPC32XX_DEFINE_DIV(_idx, _reg, _shift, _width, _table, _flags)  \
1137 [CLK_PREFIX(_idx)] = {                                                  \
1138         .type = CLK_DIV,                                                \
1139         {                                                               \
1140                 .hw0 = {                                                \
1141                         .ops = &lpc32xx_clk_divider_ops,                \
1142                         {                                               \
1143                                 .div = {                                \
1144                                         .reg = LPC32XX_CLKPWR_ ## _reg, \
1145                                         .shift = (_shift),              \
1146                                         .width = (_width),              \
1147                                         .table = (_table),              \
1148                                         .flags = (_flags),              \
1149                                  },                                     \
1150                         },                                              \
1151                  },                                                     \
1152         },                                                              \
1153 }
1154
1155 #define LPC32XX_DEFINE_GATE(_idx, _reg, _bit, _flags)                   \
1156 [CLK_PREFIX(_idx)] = {                                                  \
1157         .type = CLK_GATE,                                               \
1158         {                                                               \
1159                 .hw0 = {                                                \
1160                         .ops = &lpc32xx_clk_gate_ops,                   \
1161                         {                                               \
1162                                 .gate = {                               \
1163                                         .reg = LPC32XX_CLKPWR_ ## _reg, \
1164                                         .bit_idx = (_bit),              \
1165                                         .flags = (_flags),              \
1166                                 },                                      \
1167                         },                                              \
1168                 },                                                      \
1169         },                                                              \
1170 }
1171
1172 #define LPC32XX_DEFINE_CLK(_idx, _reg, _e, _em, _d, _dm, _b, _bm, _ops) \
1173 [CLK_PREFIX(_idx)] = {                                                  \
1174         .type = CLK_LPC32XX,                                            \
1175         {                                                               \
1176                 .hw0 = {                                                \
1177                         .ops = &(_ops),                                 \
1178                         {                                               \
1179                                 .clk = {                                \
1180                                         .reg = LPC32XX_CLKPWR_ ## _reg, \
1181                                         .enable = (_e),                 \
1182                                         .enable_mask = (_em),           \
1183                                         .disable = (_d),                \
1184                                         .disable_mask = (_dm),          \
1185                                         .busy = (_b),                   \
1186                                         .busy_mask = (_bm),             \
1187                                 },                                      \
1188                         },                                              \
1189                 },                                                      \
1190         },                                                              \
1191 }
1192
1193 #define LPC32XX_DEFINE_USB(_idx, _ce, _cd, _cm, _e, _b, _ops)           \
1194 [CLK_PREFIX(_idx)] = {                                                  \
1195         .type = CLK_LPC32XX_USB,                                        \
1196         {                                                               \
1197                 .hw0 = {                                                \
1198                         .ops = &(_ops),                                 \
1199                         {                                               \
1200                                 .usb_clk = {                            \
1201                                         .ctrl_enable = (_ce),           \
1202                                         .ctrl_disable = (_cd),          \
1203                                         .ctrl_mask = (_cm),             \
1204                                         .enable = (_e),                 \
1205                                         .busy = (_b),                   \
1206                                 }                                       \
1207                         },                                              \
1208                 }                                                       \
1209         },                                                              \
1210 }
1211
1212 #define LPC32XX_DEFINE_COMPOSITE(_idx, _mux, _div, _gate)               \
1213 [CLK_PREFIX(_idx)] = {                                                  \
1214         .type = CLK_COMPOSITE,                                          \
1215         {                                                               \
1216                 .hw1 = {                                                \
1217                 .mux = (CLK_PREFIX(_mux) == LPC32XX_CLK__NULL ? NULL :  \
1218                         &clk_hw_proto[CLK_PREFIX(_mux)].hw0),           \
1219                 .div = (CLK_PREFIX(_div) == LPC32XX_CLK__NULL ? NULL :  \
1220                         &clk_hw_proto[CLK_PREFIX(_div)].hw0),           \
1221                 .gate = (CLK_PREFIX(_gate) == LPC32XX_CLK__NULL ? NULL :\
1222                          &clk_hw_proto[CLK_PREFIX(_gate)].hw0),         \
1223                 },                                                      \
1224         },                                                              \
1225 }
1226
1227 static struct clk_hw_proto clk_hw_proto[LPC32XX_CLK_HW_MAX] = {
1228         LPC32XX_DEFINE_FIXED(RTC, 32768),
1229         LPC32XX_DEFINE_PLL(PLL397X, pll_397x, HCLKPLL_CTRL, BIT(1)),
1230         LPC32XX_DEFINE_PLL(HCLK_PLL, hclk_pll, HCLKPLL_CTRL, PLL_CTRL_ENABLE),
1231         LPC32XX_DEFINE_PLL(USB_PLL, usb_pll, USB_CTRL, PLL_CTRL_ENABLE),
1232         LPC32XX_DEFINE_GATE(OSC, OSC_CTRL, 0, CLK_GATE_SET_TO_DISABLE),
1233         LPC32XX_DEFINE_GATE(USB, USB_CTRL, 18, 0),
1234
1235         LPC32XX_DEFINE_DIV(HCLK_DIV_PERIPH, HCLKDIV_CTRL, 2, 5, NULL,
1236                            CLK_DIVIDER_READ_ONLY),
1237         LPC32XX_DEFINE_DIV(HCLK_DIV, HCLKDIV_CTRL, 0, 2, clk_hclk_div_table,
1238                            CLK_DIVIDER_READ_ONLY),
1239
1240         /* Register 3 read-only muxes with a single control PWR_CTRL[2] */
1241         LPC32XX_DEFINE_MUX(SYSCLK_PERIPH_MUX, PWR_CTRL, 2, 0x1, NULL,
1242                            CLK_MUX_READ_ONLY),
1243         LPC32XX_DEFINE_MUX(SYSCLK_HCLK_MUX, PWR_CTRL, 2, 0x1, NULL,
1244                            CLK_MUX_READ_ONLY),
1245         LPC32XX_DEFINE_MUX(SYSCLK_ARM_MUX, PWR_CTRL, 2, 0x1, NULL,
1246                            CLK_MUX_READ_ONLY),
1247         /* Register 2 read-only muxes with a single control PWR_CTRL[10] */
1248         LPC32XX_DEFINE_MUX(PERIPH_HCLK_MUX, PWR_CTRL, 10, 0x1, NULL,
1249                            CLK_MUX_READ_ONLY),
1250         LPC32XX_DEFINE_MUX(PERIPH_ARM_MUX, PWR_CTRL, 10, 0x1, NULL,
1251                            CLK_MUX_READ_ONLY),
1252
1253         /* 3 always on gates with a single control PWR_CTRL[0] same as OSC */
1254         LPC32XX_DEFINE_GATE(PERIPH, PWR_CTRL, 0, CLK_GATE_SET_TO_DISABLE),
1255         LPC32XX_DEFINE_GATE(HCLK, PWR_CTRL, 0, CLK_GATE_SET_TO_DISABLE),
1256         LPC32XX_DEFINE_GATE(ARM, PWR_CTRL, 0, CLK_GATE_SET_TO_DISABLE),
1257
1258         LPC32XX_DEFINE_GATE(ARM_VFP, DEBUG_CTRL, 4, 0),
1259         LPC32XX_DEFINE_GATE(DMA, DMA_CLK_CTRL, 0, 0),
1260         LPC32XX_DEFINE_CLK(DDRAM, HCLKDIV_CTRL, 0x0, BIT(8) | BIT(7),
1261                    0x0, BIT(8) | BIT(7), 0x0, BIT(1) | BIT(0), clk_ddram_ops),
1262
1263         LPC32XX_DEFINE_GATE(TIMER0, TIMCLK_CTRL1, 2, 0),
1264         LPC32XX_DEFINE_GATE(TIMER1, TIMCLK_CTRL1, 3, 0),
1265         LPC32XX_DEFINE_GATE(TIMER2, TIMCLK_CTRL1, 4, 0),
1266         LPC32XX_DEFINE_GATE(TIMER3, TIMCLK_CTRL1, 5, 0),
1267         LPC32XX_DEFINE_GATE(TIMER4, TIMCLK_CTRL1, 0, 0),
1268         LPC32XX_DEFINE_GATE(TIMER5, TIMCLK_CTRL1, 1, 0),
1269
1270         LPC32XX_DEFINE_GATE(SSP0, SSP_CTRL, 0, 0),
1271         LPC32XX_DEFINE_GATE(SSP1, SSP_CTRL, 1, 0),
1272         LPC32XX_DEFINE_GATE(SPI1, SPI_CTRL, 0, 0),
1273         LPC32XX_DEFINE_GATE(SPI2, SPI_CTRL, 4, 0),
1274         LPC32XX_DEFINE_GATE(I2S0, I2S_CTRL, 0, 0),
1275         LPC32XX_DEFINE_GATE(I2S1, I2S_CTRL, 1, 0),
1276         LPC32XX_DEFINE_GATE(I2C1, I2CCLK_CTRL, 0, 0),
1277         LPC32XX_DEFINE_GATE(I2C2, I2CCLK_CTRL, 1, 0),
1278         LPC32XX_DEFINE_GATE(WDOG, TIMCLK_CTRL, 0, 0),
1279         LPC32XX_DEFINE_GATE(HSTIMER, TIMCLK_CTRL, 1, 0),
1280
1281         LPC32XX_DEFINE_GATE(KEY, KEYCLK_CTRL, 0, 0),
1282         LPC32XX_DEFINE_GATE(MCPWM, TIMCLK_CTRL1, 6, 0),
1283
1284         LPC32XX_DEFINE_MUX(PWM1_MUX, PWMCLK_CTRL, 1, 0x1, NULL, 0),
1285         LPC32XX_DEFINE_DIV(PWM1_DIV, PWMCLK_CTRL, 4, 4, NULL,
1286                            CLK_DIVIDER_ONE_BASED),
1287         LPC32XX_DEFINE_GATE(PWM1_GATE, PWMCLK_CTRL, 0, 0),
1288         LPC32XX_DEFINE_COMPOSITE(PWM1, PWM1_MUX, PWM1_DIV, PWM1_GATE),
1289
1290         LPC32XX_DEFINE_MUX(PWM2_MUX, PWMCLK_CTRL, 3, 0x1, NULL, 0),
1291         LPC32XX_DEFINE_DIV(PWM2_DIV, PWMCLK_CTRL, 8, 4, NULL,
1292                            CLK_DIVIDER_ONE_BASED),
1293         LPC32XX_DEFINE_GATE(PWM2_GATE, PWMCLK_CTRL, 2, 0),
1294         LPC32XX_DEFINE_COMPOSITE(PWM2, PWM2_MUX, PWM2_DIV, PWM2_GATE),
1295
1296         LPC32XX_DEFINE_MUX(UART3_MUX, UART3_CLK_CTRL, 16, 0x1, NULL, 0),
1297         LPC32XX_DEFINE_CLK(UART3_DIV, UART3_CLK_CTRL,
1298                            0, 0, 0, 0, 0, 0, lpc32xx_uart_div_ops),
1299         LPC32XX_DEFINE_GATE(UART3_GATE, UART_CLK_CTRL, 0, 0),
1300         LPC32XX_DEFINE_COMPOSITE(UART3, UART3_MUX, UART3_DIV, UART3_GATE),
1301
1302         LPC32XX_DEFINE_MUX(UART4_MUX, UART4_CLK_CTRL, 16, 0x1, NULL, 0),
1303         LPC32XX_DEFINE_CLK(UART4_DIV, UART4_CLK_CTRL,
1304                            0, 0, 0, 0, 0, 0, lpc32xx_uart_div_ops),
1305         LPC32XX_DEFINE_GATE(UART4_GATE, UART_CLK_CTRL, 1, 0),
1306         LPC32XX_DEFINE_COMPOSITE(UART4, UART4_MUX, UART4_DIV, UART4_GATE),
1307
1308         LPC32XX_DEFINE_MUX(UART5_MUX, UART5_CLK_CTRL, 16, 0x1, NULL, 0),
1309         LPC32XX_DEFINE_CLK(UART5_DIV, UART5_CLK_CTRL,
1310                            0, 0, 0, 0, 0, 0, lpc32xx_uart_div_ops),
1311         LPC32XX_DEFINE_GATE(UART5_GATE, UART_CLK_CTRL, 2, 0),
1312         LPC32XX_DEFINE_COMPOSITE(UART5, UART5_MUX, UART5_DIV, UART5_GATE),
1313
1314         LPC32XX_DEFINE_MUX(UART6_MUX, UART6_CLK_CTRL, 16, 0x1, NULL, 0),
1315         LPC32XX_DEFINE_CLK(UART6_DIV, UART6_CLK_CTRL,
1316                            0, 0, 0, 0, 0, 0, lpc32xx_uart_div_ops),
1317         LPC32XX_DEFINE_GATE(UART6_GATE, UART_CLK_CTRL, 3, 0),
1318         LPC32XX_DEFINE_COMPOSITE(UART6, UART6_MUX, UART6_DIV, UART6_GATE),
1319
1320         LPC32XX_DEFINE_CLK(IRDA, IRDA_CLK_CTRL,
1321                            0, 0, 0, 0, 0, 0, lpc32xx_uart_div_ops),
1322
1323         LPC32XX_DEFINE_MUX(TEST1_MUX, TEST_CLK_CTRL, 5, 0x3,
1324                            test1_mux_table, 0),
1325         LPC32XX_DEFINE_GATE(TEST1_GATE, TEST_CLK_CTRL, 4, 0),
1326         LPC32XX_DEFINE_COMPOSITE(TEST1, TEST1_MUX, _NULL, TEST1_GATE),
1327
1328         LPC32XX_DEFINE_MUX(TEST2_MUX, TEST_CLK_CTRL, 1, 0x7,
1329                            test2_mux_table, 0),
1330         LPC32XX_DEFINE_GATE(TEST2_GATE, TEST_CLK_CTRL, 0, 0),
1331         LPC32XX_DEFINE_COMPOSITE(TEST2, TEST2_MUX, _NULL, TEST2_GATE),
1332
1333         LPC32XX_DEFINE_MUX(SYS, SYSCLK_CTRL, 0, 0x1, NULL, CLK_MUX_READ_ONLY),
1334
1335         LPC32XX_DEFINE_DIV(USB_DIV_DIV, USB_DIV, 0, 4, NULL, 0),
1336         LPC32XX_DEFINE_GATE(USB_DIV_GATE, USB_CTRL, 17, 0),
1337         LPC32XX_DEFINE_COMPOSITE(USB_DIV, _NULL, USB_DIV_DIV, USB_DIV_GATE),
1338
1339         LPC32XX_DEFINE_DIV(SD_DIV, MS_CTRL, 0, 4, NULL, CLK_DIVIDER_ONE_BASED),
1340         LPC32XX_DEFINE_CLK(SD_GATE, MS_CTRL, BIT(5) | BIT(9), BIT(5) | BIT(9),
1341                            0x0, BIT(5) | BIT(9), 0x0, 0x0, clk_mask_ops),
1342         LPC32XX_DEFINE_COMPOSITE(SD, _NULL, SD_DIV, SD_GATE),
1343
1344         LPC32XX_DEFINE_DIV(LCD_DIV, LCDCLK_CTRL, 0, 5, NULL, 0),
1345         LPC32XX_DEFINE_GATE(LCD_GATE, LCDCLK_CTRL, 5, 0),
1346         LPC32XX_DEFINE_COMPOSITE(LCD, _NULL, LCD_DIV, LCD_GATE),
1347
1348         LPC32XX_DEFINE_CLK(MAC, MACCLK_CTRL,
1349                            BIT(2) | BIT(1) | BIT(0), BIT(2) | BIT(1) | BIT(0),
1350                            BIT(2) | BIT(1) | BIT(0), BIT(2) | BIT(1) | BIT(0),
1351                            0x0, 0x0, clk_mask_ops),
1352         LPC32XX_DEFINE_CLK(SLC, FLASHCLK_CTRL,
1353                            BIT(2) | BIT(0), BIT(2) | BIT(0), 0x0,
1354                            BIT(0), BIT(1), BIT(2) | BIT(1), clk_mask_ops),
1355         LPC32XX_DEFINE_CLK(MLC, FLASHCLK_CTRL,
1356                            BIT(1), BIT(2) | BIT(1), 0x0, BIT(1),
1357                            BIT(2) | BIT(0), BIT(2) | BIT(0), clk_mask_ops),
1358         /*
1359          * ADC/TS clock unfortunately cannot be registered as a composite one
1360          * due to a different connection of gate, div and mux, e.g. gating it
1361          * won't mean that the clock is off, if peripheral clock is its parent:
1362          *
1363          * rtc-->[gate]-->|     |
1364          *                | mux |--> adc/ts
1365          * pclk-->[div]-->|     |
1366          *
1367          * Constraints:
1368          * ADC --- resulting clock must be <= 4.5 MHz
1369          * TS  --- resulting clock must be <= 400 KHz
1370          */
1371         LPC32XX_DEFINE_DIV(ADC_DIV, ADCCLK_CTRL1, 0, 8, NULL, 0),
1372         LPC32XX_DEFINE_GATE(ADC_RTC, ADCCLK_CTRL, 0, 0),
1373         LPC32XX_DEFINE_MUX(ADC, ADCCLK_CTRL1, 8, 0x1, NULL, 0),
1374
1375         /* USB controller clocks */
1376         LPC32XX_DEFINE_USB(USB_AHB,
1377                            BIT(24), 0x0, BIT(24), BIT(4), 0, clk_usb_ops),
1378         LPC32XX_DEFINE_USB(USB_OTG,
1379                            0x0, 0x0, 0x0, BIT(3), 0, clk_usb_ops),
1380         LPC32XX_DEFINE_USB(USB_I2C,
1381                            0x0, BIT(23), BIT(23), BIT(2), 0, clk_usb_i2c_ops),
1382         LPC32XX_DEFINE_USB(USB_DEV,
1383                            BIT(22), 0x0, BIT(22), BIT(1), BIT(0), clk_usb_ops),
1384         LPC32XX_DEFINE_USB(USB_HOST,
1385                            BIT(21), 0x0, BIT(21), BIT(0), BIT(1), clk_usb_ops),
1386 };
1387
1388 static struct clk * __init lpc32xx_clk_register(u32 id)
1389 {
1390         const struct clk_proto_t *lpc32xx_clk = &clk_proto[id];
1391         struct clk_hw_proto *clk_hw = &clk_hw_proto[id];
1392         const char *parents[LPC32XX_CLK_PARENTS_MAX];
1393         struct clk *clk;
1394         unsigned int i;
1395
1396         for (i = 0; i < lpc32xx_clk->num_parents; i++)
1397                 parents[i] = clk_proto[lpc32xx_clk->parents[i]].name;
1398
1399         pr_debug("%s: derived from '%s', clock type %d\n", lpc32xx_clk->name,
1400                  parents[0], clk_hw->type);
1401
1402         switch (clk_hw->type) {
1403         case CLK_LPC32XX:
1404         case CLK_LPC32XX_PLL:
1405         case CLK_LPC32XX_USB:
1406         case CLK_MUX:
1407         case CLK_DIV:
1408         case CLK_GATE:
1409         {
1410                 struct clk_init_data clk_init = {
1411                         .name = lpc32xx_clk->name,
1412                         .parent_names = parents,
1413                         .num_parents = lpc32xx_clk->num_parents,
1414                         .flags = lpc32xx_clk->flags,
1415                         .ops = clk_hw->hw0.ops,
1416                 };
1417                 struct clk_hw *hw;
1418
1419                 if (clk_hw->type == CLK_LPC32XX)
1420                         hw = &clk_hw->hw0.clk.hw;
1421                 else if (clk_hw->type == CLK_LPC32XX_PLL)
1422                         hw = &clk_hw->hw0.pll.hw;
1423                 else if (clk_hw->type == CLK_LPC32XX_USB)
1424                         hw = &clk_hw->hw0.usb_clk.hw;
1425                 else if (clk_hw->type == CLK_MUX)
1426                         hw = &clk_hw->hw0.mux.hw;
1427                 else if (clk_hw->type == CLK_DIV)
1428                         hw = &clk_hw->hw0.div.hw;
1429                 else if (clk_hw->type == CLK_GATE)
1430                         hw = &clk_hw->hw0.gate.hw;
1431                 else
1432                         return ERR_PTR(-EINVAL);
1433
1434                 hw->init = &clk_init;
1435                 clk = clk_register(NULL, hw);
1436                 break;
1437         }
1438         case CLK_COMPOSITE:
1439         {
1440                 struct clk_hw *mux_hw = NULL, *div_hw = NULL, *gate_hw = NULL;
1441                 const struct clk_ops *mops = NULL, *dops = NULL, *gops = NULL;
1442                 struct clk_hw_proto0 *mux0, *div0, *gate0;
1443
1444                 mux0 = clk_hw->hw1.mux;
1445                 div0 = clk_hw->hw1.div;
1446                 gate0 = clk_hw->hw1.gate;
1447                 if (mux0) {
1448                         mops = mux0->ops;
1449                         mux_hw = &mux0->clk.hw;
1450                 }
1451                 if (div0) {
1452                         dops = div0->ops;
1453                         div_hw = &div0->clk.hw;
1454                 }
1455                 if (gate0) {
1456                         gops = gate0->ops;
1457                         gate_hw = &gate0->clk.hw;
1458                 }
1459
1460                 clk = clk_register_composite(NULL, lpc32xx_clk->name,
1461                                 parents, lpc32xx_clk->num_parents,
1462                                 mux_hw, mops, div_hw, dops,
1463                                 gate_hw, gops, lpc32xx_clk->flags);
1464                 break;
1465         }
1466         case CLK_FIXED:
1467         {
1468                 struct clk_fixed_rate *fixed = &clk_hw->f;
1469
1470                 clk = clk_register_fixed_rate(NULL, lpc32xx_clk->name,
1471                         parents[0], 0, fixed->fixed_rate);
1472                 break;
1473         }
1474         default:
1475                 clk = ERR_PTR(-EINVAL);
1476         }
1477
1478         return clk;
1479 }
1480
1481 static void __init lpc32xx_clk_div_quirk(u32 reg, u32 div_mask, u32 gate)
1482 {
1483         u32 val;
1484
1485         regmap_read(clk_regmap, reg, &val);
1486
1487         if (!(val & div_mask)) {
1488                 val &= ~gate;
1489                 val |= BIT(__ffs(div_mask));
1490         }
1491
1492         regmap_update_bits(clk_regmap, reg, gate | div_mask, val);
1493 }
1494
1495 static void __init lpc32xx_clk_init(struct device_node *np)
1496 {
1497         unsigned int i;
1498         struct clk *clk_osc, *clk_32k;
1499         void __iomem *base = NULL;
1500
1501         /* Ensure that parent clocks are available and valid */
1502         clk_32k = of_clk_get_by_name(np, clk_proto[LPC32XX_CLK_XTAL_32K].name);
1503         if (IS_ERR(clk_32k)) {
1504                 pr_err("failed to find external 32KHz clock: %ld\n",
1505                        PTR_ERR(clk_32k));
1506                 return;
1507         }
1508         if (clk_get_rate(clk_32k) != 32768) {
1509                 pr_err("invalid clock rate of external 32KHz oscillator\n");
1510                 return;
1511         }
1512
1513         clk_osc = of_clk_get_by_name(np, clk_proto[LPC32XX_CLK_XTAL].name);
1514         if (IS_ERR(clk_osc)) {
1515                 pr_err("failed to find external main oscillator clock: %ld\n",
1516                        PTR_ERR(clk_osc));
1517                 return;
1518         }
1519
1520         base = of_iomap(np, 0);
1521         if (!base) {
1522                 pr_err("failed to map system control block registers\n");
1523                 return;
1524         }
1525
1526         clk_regmap = regmap_init_mmio(NULL, base, &lpc32xx_scb_regmap_config);
1527         if (IS_ERR(clk_regmap)) {
1528                 pr_err("failed to regmap system control block: %ld\n",
1529                         PTR_ERR(clk_regmap));
1530                 iounmap(base);
1531                 return;
1532         }
1533
1534         /*
1535          * Divider part of PWM and MS clocks requires a quirk to avoid
1536          * a misinterpretation of formally valid zero value in register
1537          * bitfield, which indicates another clock gate. Instead of
1538          * adding complexity to a gate clock ensure that zero value in
1539          * divider clock is never met in runtime.
1540          */
1541         lpc32xx_clk_div_quirk(LPC32XX_CLKPWR_PWMCLK_CTRL, 0xf0, BIT(0));
1542         lpc32xx_clk_div_quirk(LPC32XX_CLKPWR_PWMCLK_CTRL, 0xf00, BIT(2));
1543         lpc32xx_clk_div_quirk(LPC32XX_CLKPWR_MS_CTRL, 0xf, BIT(5) | BIT(9));
1544
1545         for (i = 1; i < LPC32XX_CLK_MAX; i++) {
1546                 clk[i] = lpc32xx_clk_register(i);
1547                 if (IS_ERR(clk[i])) {
1548                         pr_err("failed to register %s clock: %ld\n",
1549                                 clk_proto[i].name, PTR_ERR(clk[i]));
1550                         clk[i] = NULL;
1551                 }
1552         }
1553
1554         of_clk_add_provider(np, of_clk_src_onecell_get, &clk_data);
1555
1556         /* Set 48MHz rate of USB PLL clock */
1557         clk_set_rate(clk[LPC32XX_CLK_USB_PLL], 48000000);
1558
1559         /* These two clocks must be always on independently on consumers */
1560         clk_prepare_enable(clk[LPC32XX_CLK_ARM]);
1561         clk_prepare_enable(clk[LPC32XX_CLK_HCLK]);
1562
1563         /* Enable ARM VFP by default */
1564         clk_prepare_enable(clk[LPC32XX_CLK_ARM_VFP]);
1565
1566         /* Disable enabled by default clocks for NAND MLC and SLC */
1567         clk_mask_disable(&clk_hw_proto[LPC32XX_CLK_SLC].hw0.clk.hw);
1568         clk_mask_disable(&clk_hw_proto[LPC32XX_CLK_MLC].hw0.clk.hw);
1569 }
1570 CLK_OF_DECLARE(lpc32xx_clk, "nxp,lpc3220-clk", lpc32xx_clk_init);
1571
1572 static void __init lpc32xx_usb_clk_init(struct device_node *np)
1573 {
1574         unsigned int i;
1575
1576         usb_clk_vbase = of_iomap(np, 0);
1577         if (!usb_clk_vbase) {
1578                 pr_err("failed to map address range\n");
1579                 return;
1580         }
1581
1582         for (i = 1; i < LPC32XX_USB_CLK_MAX; i++) {
1583                 usb_clk[i] = lpc32xx_clk_register(i + LPC32XX_CLK_USB_OFFSET);
1584                 if (IS_ERR(usb_clk[i])) {
1585                         pr_err("failed to register %s clock: %ld\n",
1586                                 clk_proto[i].name, PTR_ERR(usb_clk[i]));
1587                         usb_clk[i] = NULL;
1588                 }
1589         }
1590
1591         of_clk_add_provider(np, of_clk_src_onecell_get, &usb_clk_data);
1592 }
1593 CLK_OF_DECLARE(lpc32xx_usb_clk, "nxp,lpc3220-usb-clk", lpc32xx_usb_clk_init);