drivers/pinctrl/pinctrl-lpc18xx.c

   1 /*
   2  * Pinctrl driver for NXP LPC18xx/LPC43xx System Control Unit (SCU)
   3  *
   4  * Copyright (C) 2015 Joachim Eastwood <manabian@gmail.com>
   5  *
   6  * This file is licensed under the terms of the GNU General Public
   7  * License version 2. This program is licensed "as is" without any
   8  * warranty of any kind, whether express or implied.
   9  */
  10
  11 #include <linux/bitops.h>
  12 #include <linux/clk.h>
  13 #include <linux/io.h>
  14 #include <linux/init.h>
  15 #include <linux/of.h>
  16 #include <linux/of_device.h>
  17 #include <linux/pinctrl/pinctrl.h>
  18 #include <linux/pinctrl/pinmux.h>
  19 #include <linux/pinctrl/pinconf-generic.h>
  20
  21 #include "core.h"
  22 #include "pinctrl-utils.h"
  23
  24 /* LPC18XX SCU analog function registers */
  25 #define LPC18XX_SCU_REG_ENAIO0          0xc88
  26 #define LPC18XX_SCU_REG_ENAIO1          0xc8c
  27 #define LPC18XX_SCU_REG_ENAIO2          0xc90
  28 #define LPC18XX_SCU_REG_ENAIO2_DAC      BIT(0)
  29
  30 /* LPC18XX SCU pin register definitions */
  31 #define LPC18XX_SCU_PIN_MODE_MASK       0x7
  32 #define LPC18XX_SCU_PIN_EPD             BIT(3)
  33 #define LPC18XX_SCU_PIN_EPUN            BIT(4)
  34 #define LPC18XX_SCU_PIN_EHS             BIT(5)
  35 #define LPC18XX_SCU_PIN_EZI             BIT(6)
  36 #define LPC18XX_SCU_PIN_ZIF             BIT(7)
  37 #define LPC18XX_SCU_PIN_EHD_MASK        0x300
  38 #define LPC18XX_SCU_PIN_EHD_POS         8
  39
  40 #define LPC18XX_SCU_USB1_EPD            BIT(2)
  41 #define LPC18XX_SCU_USB1_EPWR           BIT(4)
  42
  43 #define LPC18XX_SCU_I2C0_EFP            BIT(0)
  44 #define LPC18XX_SCU_I2C0_EHD            BIT(2)
  45 #define LPC18XX_SCU_I2C0_EZI            BIT(3)
  46 #define LPC18XX_SCU_I2C0_ZIF            BIT(7)
  47 #define LPC18XX_SCU_I2C0_SCL_SHIFT      0
  48 #define LPC18XX_SCU_I2C0_SDA_SHIFT      8
  49
  50 #define LPC18XX_SCU_FUNC_PER_PIN        8
  51
  52 /* LPC18XX SCU pin interrupt select registers */
  53 #define LPC18XX_SCU_PINTSEL0            0xe00
  54 #define LPC18XX_SCU_PINTSEL1            0xe04
  55 #define LPC18XX_SCU_PINTSEL_VAL_MASK    0xff
  56 #define LPC18XX_SCU_PINTSEL_PORT_SHIFT  5
  57 #define LPC18XX_SCU_IRQ_PER_PINTSEL     4
  58 #define LPC18XX_GPIO_PINS_PER_PORT      32
  59 #define LPC18XX_GPIO_PIN_INT_MAX        8
  60
  61 #define LPC18XX_SCU_PINTSEL_VAL(val, n) \
  62         ((val) << (((n) % LPC18XX_SCU_IRQ_PER_PINTSEL) * 8))
  63
  64 /* LPC18xx pin types */
  65 enum {
  66         TYPE_ND,        /* Normal-drive */
  67         TYPE_HD,        /* High-drive */
  68         TYPE_HS,        /* High-speed */
  69         TYPE_I2C0,
  70         TYPE_USB1,
  71 };
  72
  73 /* LPC18xx pin functions */
  74 enum {
  75         FUNC_R,         /* Reserved */
  76         FUNC_ADC,
  77         FUNC_ADCTRIG,
  78         FUNC_CAN0,
  79         FUNC_CAN1,
  80         FUNC_CGU_OUT,
  81         FUNC_CLKIN,
  82         FUNC_CLKOUT,
  83         FUNC_CTIN,
  84         FUNC_CTOUT,
  85         FUNC_DAC,
  86         FUNC_EMC,
  87         FUNC_EMC_ALT,
  88         FUNC_ENET,
  89         FUNC_ENET_ALT,
  90         FUNC_GPIO,
  91         FUNC_I2C0,
  92         FUNC_I2C1,
  93         FUNC_I2S0_RX_MCLK,
  94         FUNC_I2S0_RX_SCK,
  95         FUNC_I2S0_RX_SDA,
  96         FUNC_I2S0_RX_WS,
  97         FUNC_I2S0_TX_MCLK,
  98         FUNC_I2S0_TX_SCK,
  99         FUNC_I2S0_TX_SDA,
 100         FUNC_I2S0_TX_WS,
 101         FUNC_I2S1,
 102         FUNC_LCD,
 103         FUNC_LCD_ALT,
 104         FUNC_MCTRL,
 105         FUNC_NMI,
 106         FUNC_QEI,
 107         FUNC_SDMMC,
 108         FUNC_SGPIO,
 109         FUNC_SPI,
 110         FUNC_SPIFI,
 111         FUNC_SSP0,
 112         FUNC_SSP0_ALT,
 113         FUNC_SSP1,
 114         FUNC_TIMER0,
 115         FUNC_TIMER1,
 116         FUNC_TIMER2,
 117         FUNC_TIMER3,
 118         FUNC_TRACE,
 119         FUNC_UART0,
 120         FUNC_UART1,
 121         FUNC_UART2,
 122         FUNC_UART3,
 123         FUNC_USB0,
 124         FUNC_USB1,
 125         FUNC_MAX
 126 };
 127
 128 static const char *const lpc18xx_function_names[] = {
 129         [FUNC_R]                = "reserved",
 130         [FUNC_ADC]              = "adc",
 131         [FUNC_ADCTRIG]          = "adctrig",
 132         [FUNC_CAN0]             = "can0",
 133         [FUNC_CAN1]             = "can1",
 134         [FUNC_CGU_OUT]          = "cgu_out",
 135         [FUNC_CLKIN]            = "clkin",
 136         [FUNC_CLKOUT]           = "clkout",
 137         [FUNC_CTIN]             = "ctin",
 138         [FUNC_CTOUT]            = "ctout",
 139         [FUNC_DAC]              = "dac",
 140         [FUNC_EMC]              = "emc",
 141         [FUNC_EMC_ALT]          = "emc_alt",
 142         [FUNC_ENET]             = "enet",
 143         [FUNC_ENET_ALT]         = "enet_alt",
 144         [FUNC_GPIO]             = "gpio",
 145         [FUNC_I2C0]             = "i2c0",
 146         [FUNC_I2C1]             = "i2c1",
 147         [FUNC_I2S0_RX_MCLK]     = "i2s0_rx_mclk",
 148         [FUNC_I2S0_RX_SCK]      = "i2s0_rx_sck",
 149         [FUNC_I2S0_RX_SDA]      = "i2s0_rx_sda",
 150         [FUNC_I2S0_RX_WS]       = "i2s0_rx_ws",
 151         [FUNC_I2S0_TX_MCLK]     = "i2s0_tx_mclk",
 152         [FUNC_I2S0_TX_SCK]      = "i2s0_tx_sck",
 153         [FUNC_I2S0_TX_SDA]      = "i2s0_tx_sda",
 154         [FUNC_I2S0_TX_WS]       = "i2s0_tx_ws",
 155         [FUNC_I2S1]             = "i2s1",
 156         [FUNC_LCD]              = "lcd",
 157         [FUNC_LCD_ALT]          = "lcd_alt",
 158         [FUNC_MCTRL]            = "mctrl",
 159         [FUNC_NMI]              = "nmi",
 160         [FUNC_QEI]              = "qei",
 161         [FUNC_SDMMC]            = "sdmmc",
 162         [FUNC_SGPIO]            = "sgpio",
 163         [FUNC_SPI]              = "spi",
 164         [FUNC_SPIFI]            = "spifi",
 165         [FUNC_SSP0]             = "ssp0",
 166         [FUNC_SSP0_ALT]         = "ssp0_alt",
 167         [FUNC_SSP1]             = "ssp1",
 168         [FUNC_TIMER0]           = "timer0",
 169         [FUNC_TIMER1]           = "timer1",
 170         [FUNC_TIMER2]           = "timer2",
 171         [FUNC_TIMER3]           = "timer3",
 172         [FUNC_TRACE]            = "trace",
 173         [FUNC_UART0]            = "uart0",
 174         [FUNC_UART1]            = "uart1",
 175         [FUNC_UART2]            = "uart2",
 176         [FUNC_UART3]            = "uart3",
 177         [FUNC_USB0]             = "usb0",
 178         [FUNC_USB1]             = "usb1",
 179 };
 180
 181 struct lpc18xx_pmx_func {
 182         const char **groups;
 183         unsigned ngroups;
 184 };
 185
 186 struct lpc18xx_scu_data {
 187         struct pinctrl_dev *pctl;
 188         void __iomem *base;
 189         struct clk *clk;
 190         struct lpc18xx_pmx_func func[FUNC_MAX];
 191 };
 192
 193 struct lpc18xx_pin_caps {
 194         unsigned int offset;
 195         unsigned char functions[LPC18XX_SCU_FUNC_PER_PIN];
 196         unsigned char analog;
 197         unsigned char type;
 198 };
 199
 200 /* Analog pins are required to have both bias and input disabled */
 201 #define LPC18XX_SCU_ANALOG_PIN_CFG      0x10
 202
 203 /* Macros to maniupluate analog member in lpc18xx_pin_caps */
 204 #define LPC18XX_ANALOG_PIN              BIT(7)
 205 #define LPC18XX_ANALOG_ADC(a)           ((a >> 5) & 0x3)
 206 #define LPC18XX_ANALOG_BIT_MASK         0x1f
 207 #define ADC0                            (LPC18XX_ANALOG_PIN | (0x00 << 5))
 208 #define ADC1                            (LPC18XX_ANALOG_PIN | (0x01 << 5))
 209 #define DAC                             LPC18XX_ANALOG_PIN
 210
 211 #define LPC_P(port, pin, f0, f1, f2, f3, f4, f5, f6, f7, a, t)  \
 212 static struct lpc18xx_pin_caps lpc18xx_pin_p##port##_##pin = {  \
 213         .offset = 0x##port * 32 * 4 + pin * 4,                  \
 214         .functions = {                                          \
 215                         FUNC_##f0, FUNC_##f1, FUNC_##f2,        \
 216                         FUNC_##f3, FUNC_##f4, FUNC_##f5,        \
 217                         FUNC_##f6, FUNC_##f7,                   \
 218         },                                                      \
 219         .analog = a,                                            \
 220         .type = TYPE_##t,                                       \
 221 }
 222
 223 #define LPC_N(pname, off, f0, f1, f2, f3, f4, f5, f6, f7, a, t) \
 224 static struct lpc18xx_pin_caps lpc18xx_pin_##pname = {          \
 225         .offset = off,                                          \
 226         .functions = {                                          \
 227                         FUNC_##f0, FUNC_##f1, FUNC_##f2,        \
 228                         FUNC_##f3, FUNC_##f4, FUNC_##f5,        \
 229                         FUNC_##f6, FUNC_##f7,                   \
 230         },                                                      \
 231         .analog = a,                                            \
 232         .type = TYPE_##t,                                       \
 233 }
 234
 235
 236 /* Pinmuxing table taken from data sheet */
 237 /*    Pin    FUNC0  FUNC1  FUNC2  FUNC3   FUNC4   FUNC5   FUNC6    FUNC7 ANALOG TYPE */
 238 LPC_P(0,0,   GPIO,  SSP1,  ENET,  SGPIO,      R,      R, I2S0_TX_WS,I2S1,     0, ND);
 239 LPC_P(0,1,   GPIO,  SSP1,ENET_ALT,SGPIO,      R,      R,   ENET,    I2S1,     0, ND);
 240 LPC_P(1,0,   GPIO,  CTIN,   EMC,      R,      R,   SSP0,  SGPIO,       R,     0, ND);
 241 LPC_P(1,1,   GPIO, CTOUT,   EMC,  SGPIO,      R,   SSP0,      R,       R,     0, ND);
 242 LPC_P(1,2,   GPIO, CTOUT,   EMC,  SGPIO,      R,   SSP0,      R,       R,     0, ND);
 243 LPC_P(1,3,   GPIO, CTOUT, SGPIO,    EMC,   USB0,   SSP1,      R,   SDMMC,     0, ND);
 244 LPC_P(1,4,   GPIO, CTOUT, SGPIO,    EMC,   USB0,   SSP1,      R,   SDMMC,     0, ND);
 245 LPC_P(1,5,   GPIO, CTOUT,     R,    EMC,   USB0,   SSP1,  SGPIO,   SDMMC,     0, ND);
 246 LPC_P(1,6,   GPIO,  CTIN,     R,    EMC,      R,      R,  SGPIO,   SDMMC,     0, ND);
 247 LPC_P(1,7,   GPIO, UART1, CTOUT,    EMC,   USB0,      R,      R,       R,     0, ND);
 248 LPC_P(1,8,   GPIO, UART1, CTOUT,    EMC,      R,      R,      R,   SDMMC,     0, ND);
 249 LPC_P(1,9,   GPIO, UART1, CTOUT,    EMC,      R,      R,      R,   SDMMC,     0, ND);
 250 LPC_P(1,10,  GPIO, UART1, CTOUT,    EMC,      R,      R,      R,   SDMMC,     0, ND);
 251 LPC_P(1,11,  GPIO, UART1, CTOUT,    EMC,      R,      R,      R,   SDMMC,     0, ND);
 252 LPC_P(1,12,  GPIO, UART1,     R,    EMC, TIMER0,      R,  SGPIO,   SDMMC,     0, ND);
 253 LPC_P(1,13,  GPIO, UART1,     R,    EMC, TIMER0,      R,  SGPIO,   SDMMC,     0, ND);
 254 LPC_P(1,14,  GPIO, UART1,     R,    EMC, TIMER0,      R,  SGPIO,       R,     0, ND);
 255 LPC_P(1,15,  GPIO, UART2, SGPIO,   ENET, TIMER0,      R,      R,       R,     0, ND);
 256 LPC_P(1,16,  GPIO, UART2, SGPIO,ENET_ALT,TIMER0,      R,      R,    ENET,     0, ND);
 257 LPC_P(1,17,  GPIO, UART2,     R,   ENET, TIMER0,   CAN1,  SGPIO,       R,     0, HD);
 258 LPC_P(1,18,  GPIO, UART2,     R,   ENET, TIMER0,   CAN1,  SGPIO,       R,     0, ND);
 259 LPC_P(1,19,  ENET,  SSP1,     R,      R, CLKOUT,      R, I2S0_RX_MCLK,I2S1,   0, ND);
 260 LPC_P(1,20,  GPIO,  SSP1,     R,   ENET, TIMER0,      R,  SGPIO,       R,     0, ND);
 261 LPC_P(2,0,  SGPIO, UART0,   EMC,   USB0,   GPIO,      R, TIMER3,    ENET,     0, ND);
 262 LPC_P(2,1,  SGPIO, UART0,   EMC,   USB0,   GPIO,      R, TIMER3,       R,     0, ND);
 263 LPC_P(2,2,  SGPIO, UART0,   EMC,   USB0,   GPIO,   CTIN, TIMER3,       R,     0, ND);
 264 LPC_P(2,3,  SGPIO,  I2C1, UART3,   CTIN,   GPIO,      R, TIMER3,    USB0,     0, HD);
 265 LPC_P(2,4,  SGPIO,  I2C1, UART3,   CTIN,   GPIO,      R, TIMER3,    USB0,     0, HD);
 266 LPC_P(2,5,  SGPIO,  CTIN,  USB1, ADCTRIG,  GPIO,      R, TIMER3,    USB0,     0, HD);
 267 LPC_P(2,6,  SGPIO, UART0,   EMC,   USB0,   GPIO,   CTIN, TIMER3,       R,     0, ND);
 268 LPC_P(2,7,   GPIO, CTOUT, UART3,    EMC,      R,      R, TIMER3,       R,     0, ND);
 269 LPC_P(2,8,  SGPIO, CTOUT, UART3,    EMC,   GPIO,      R,      R,       R,     0, ND);
 270 LPC_P(2,9,   GPIO, CTOUT, UART3,    EMC,      R,      R,      R,       R,     0, ND);
 271 LPC_P(2,10,  GPIO, CTOUT, UART2,    EMC,      R,      R,      R,       R,     0, ND);
 272 LPC_P(2,11,  GPIO, CTOUT, UART2,    EMC,      R,      R,      R,       R,     0, ND);
 273 LPC_P(2,12,  GPIO, CTOUT,     R,    EMC,      R,      R,      R,   UART2,     0, ND);
 274 LPC_P(2,13,  GPIO,  CTIN,     R,    EMC,      R,      R,      R,   UART2,     0, ND);
 275 LPC_P(3,0,  I2S0_RX_SCK, I2S0_RX_MCLK, I2S0_TX_SCK, I2S0_TX_MCLK,SSP0,R,R,R,  0, ND);
 276 LPC_P(3,1,  I2S0_TX_WS, I2S0_RX_WS,CAN0,USB1,GPIO,    R,    LCD,       R,     0, ND);
 277 LPC_P(3,2,  I2S0_TX_SDA, I2S0_RX_SDA,CAN0,USB1,GPIO,  R,    LCD,      R,      0, ND);
 278 LPC_P(3,3,      R,   SPI,  SSP0,  SPIFI, CGU_OUT,R, I2S0_TX_MCLK,  I2S1,      0, HS);
 279 LPC_P(3,4,   GPIO,     R,     R,  SPIFI,  UART1, I2S0_TX_WS, I2S1,  LCD,      0, ND);
 280 LPC_P(3,5,   GPIO,     R,     R,  SPIFI,  UART1, I2S0_TX_SDA,I2S1,  LCD,      0, ND);
 281 LPC_P(3,6,   GPIO,   SPI,  SSP0,  SPIFI,      R,  SSP0_ALT,   R,      R,      0, ND);
 282 LPC_P(3,7,      R,   SPI,  SSP0,  SPIFI,   GPIO,  SSP0_ALT,   R,      R,      0, ND);
 283 LPC_P(3,8,      R,   SPI,  SSP0,  SPIFI,   GPIO,  SSP0_ALT,   R,      R,      0, ND);
 284 LPC_P(4,0,   GPIO, MCTRL,   NMI,      R,      R,    LCD,  UART3,      R,      0, ND);
 285 LPC_P(4,1,   GPIO, CTOUT,   LCD,      R,      R, LCD_ALT, UART3,   ENET, ADC0|1, ND);
 286 LPC_P(4,2,   GPIO, CTOUT,   LCD,      R,      R, LCD_ALT, UART3,  SGPIO,      0, ND);
 287 LPC_P(4,3,   GPIO, CTOUT,   LCD,      R,      R, LCD_ALT, UART3,  SGPIO, ADC0|0, ND);
 288 LPC_P(4,4,   GPIO, CTOUT,   LCD,      R,      R, LCD_ALT, UART3,  SGPIO,    DAC, ND);
 289 LPC_P(4,5,   GPIO, CTOUT,   LCD,      R,      R,      R,      R,  SGPIO,      0, ND);
 290 LPC_P(4,6,   GPIO, CTOUT,   LCD,      R,      R,      R,      R,  SGPIO,      0, ND);
 291 LPC_P(4,7,    LCD, CLKIN,     R,      R,      R,      R,   I2S1,I2S0_TX_SCK,  0, ND);
 292 LPC_P(4,8,      R,  CTIN,   LCD,      R,   GPIO, LCD_ALT,  CAN1,  SGPIO,      0, ND);
 293 LPC_P(4,9,      R,  CTIN,   LCD,      R,   GPIO, LCD_ALT,  CAN1,  SGPIO,      0, ND);
 294 LPC_P(4,10,     R,  CTIN,   LCD,      R,   GPIO, LCD_ALT,     R,  SGPIO,      0, ND);
 295 LPC_P(5,0,   GPIO, MCTRL,   EMC,      R,  UART1, TIMER1,      R,      R,      0, ND);
 296 LPC_P(5,1,   GPIO, MCTRL,   EMC,      R,  UART1, TIMER1,      R,      R,      0, ND);
 297 LPC_P(5,2,   GPIO, MCTRL,   EMC,      R,  UART1, TIMER1,      R,      R,      0, ND);
 298 LPC_P(5,3,   GPIO, MCTRL,   EMC,      R,  UART1, TIMER1,      R,      R,      0, ND);
 299 LPC_P(5,4,   GPIO, MCTRL,   EMC,      R,  UART1, TIMER1,      R,      R,      0, ND);
 300 LPC_P(5,5,   GPIO, MCTRL,   EMC,      R,  UART1, TIMER1,      R,      R,      0, ND);
 301 LPC_P(5,6,   GPIO, MCTRL,   EMC,      R,  UART1, TIMER1,      R,      R,      0, ND);
 302 LPC_P(5,7,   GPIO, MCTRL,   EMC,      R,  UART1, TIMER1,      R,      R,      0, ND);
 303 LPC_P(6,0,      R, I2S0_RX_MCLK,R,    R, I2S0_RX_SCK, R,      R,      R,      0, ND);
 304 LPC_P(6,1,   GPIO,   EMC, UART0, I2S0_RX_WS,  R, TIMER2,      R,      R,      0, ND);
 305 LPC_P(6,2,   GPIO,   EMC, UART0, I2S0_RX_SDA, R, TIMER2,      R,      R,      0, ND);
 306 LPC_P(6,3,   GPIO,  USB0, SGPIO,    EMC,      R, TIMER2,      R,      R,      0, ND);
 307 LPC_P(6,4,   GPIO,  CTIN, UART0,    EMC,      R,      R,      R,      R,      0, ND);
 308 LPC_P(6,5,   GPIO, CTOUT, UART0,    EMC,      R,      R,      R,      R,      0, ND);
 309 LPC_P(6,6,   GPIO,   EMC, SGPIO,   USB0,      R, TIMER2,      R,      R,      0, ND);
 310 LPC_P(6,7,      R,   EMC, SGPIO,   USB0,   GPIO, TIMER2,      R,      R,      0, ND);
 311 LPC_P(6,8,      R,   EMC, SGPIO,   USB0,   GPIO, TIMER2,      R,      R,      0, ND);
 312 LPC_P(6,9,   GPIO,     R,     R,    EMC,      R, TIMER2,      R,      R,      0, ND);
 313 LPC_P(6,10,  GPIO, MCTRL,     R,    EMC,      R,      R,      R,      R,      0, ND);
 314 LPC_P(6,11,  GPIO,     R,     R,    EMC,      R, TIMER2,      R,      R,      0, ND);
 315 LPC_P(6,12,  GPIO, CTOUT,     R,    EMC,      R,      R,      R,      R,      0, ND);
 316 LPC_P(7,0,   GPIO, CTOUT,     R,    LCD,      R,      R,      R,  SGPIO,      0, ND);
 317 LPC_P(7,1,   GPIO, CTOUT,I2S0_TX_WS,LCD,LCD_ALT,      R,  UART2,  SGPIO,      0, ND);
 318 LPC_P(7,2,   GPIO, CTIN,I2S0_TX_SDA,LCD,LCD_ALT,      R,  UART2,  SGPIO,      0, ND);
 319 LPC_P(7,3,   GPIO, CTIN,      R,    LCD,LCD_ALT,      R,      R,      R,      0, ND);
 320 LPC_P(7,4,   GPIO, CTOUT,     R,    LCD,LCD_ALT,  TRACE,      R,      R, ADC0|4, ND);
 321 LPC_P(7,5,   GPIO, CTOUT,     R,    LCD,LCD_ALT,  TRACE,      R,      R, ADC0|3, ND);
 322 LPC_P(7,6,   GPIO, CTOUT,     R,    LCD,      R,  TRACE,      R,      R,      0, ND);
 323 LPC_P(7,7,   GPIO, CTOUT,     R,    LCD,      R,  TRACE,   ENET,  SGPIO, ADC1|6, ND);
 324 LPC_P(8,0,   GPIO,  USB0,     R,  MCTRL,  SGPIO,      R,      R, TIMER0,      0, HD);
 325 LPC_P(8,1,   GPIO,  USB0,     R,  MCTRL,  SGPIO,      R,      R, TIMER0,      0, HD);
 326 LPC_P(8,2,   GPIO,  USB0,     R,  MCTRL,  SGPIO,      R,      R, TIMER0,      0, HD);
 327 LPC_P(8,3,   GPIO,  USB1,     R,    LCD, LCD_ALT,     R,      R, TIMER0,      0, ND);
 328 LPC_P(8,4,   GPIO,  USB1,     R,    LCD, LCD_ALT,     R,      R, TIMER0,      0, ND);
 329 LPC_P(8,5,   GPIO,  USB1,     R,    LCD, LCD_ALT,     R,      R, TIMER0,      0, ND);
 330 LPC_P(8,6,   GPIO,  USB1,     R,    LCD, LCD_ALT,     R,      R, TIMER0,      0, ND);
 331 LPC_P(8,7,   GPIO,  USB1,     R,    LCD, LCD_ALT,     R,      R, TIMER0,      0, ND);
 332 LPC_P(8,8,      R,  USB1,     R,      R,      R,      R,CGU_OUT,   I2S1,      0, ND);
 333 LPC_P(9,0,   GPIO, MCTRL,     R,      R,      R,   ENET,  SGPIO,   SSP0,      0, ND);
 334 LPC_P(9,1,   GPIO, MCTRL,     R,      R, I2S0_TX_WS,ENET, SGPIO,   SSP0,      0, ND);
 335 LPC_P(9,2,   GPIO, MCTRL,     R,      R, I2S0_TX_SDA,ENET,SGPIO,   SSP0,      0, ND);
 336 LPC_P(9,3,   GPIO, MCTRL,  USB1,      R,      R,   ENET,  SGPIO,  UART3,      0, ND);
 337 LPC_P(9,4,      R, MCTRL,  USB1,      R,   GPIO,   ENET,  SGPIO,  UART3,      0, ND);
 338 LPC_P(9,5,      R, MCTRL,  USB1,      R,   GPIO,   ENET,  SGPIO,  UART0,      0, ND);
 339 LPC_P(9,6,   GPIO, MCTRL,  USB1,      R,      R,   ENET,  SGPIO,  UART0,      0, ND);
 340 LPC_P(a,0,      R,     R,     R,      R,      R,   I2S1, CGU_OUT,     R,      0, ND);
 341 LPC_P(a,1,   GPIO,   QEI,     R,  UART2,      R,      R,      R,      R,      0, HD);
 342 LPC_P(a,2,   GPIO,   QEI,     R,  UART2,      R,      R,      R,      R,      0, HD);
 343 LPC_P(a,3,   GPIO,   QEI,     R,      R,      R,      R,      R,      R,      0, HD);
 344 LPC_P(a,4,      R, CTOUT,     R,    EMC,   GPIO,      R,      R,      R,      0, ND);
 345 LPC_P(b,0,      R, CTOUT,   LCD,      R,   GPIO,      R,      R,      R,      0, ND);
 346 LPC_P(b,1,      R,  USB1,   LCD,      R,   GPIO,  CTOUT,      R,      R,      0, ND);
 347 LPC_P(b,2,      R,  USB1,   LCD,      R,   GPIO,  CTOUT,      R,      R,      0, ND);
 348 LPC_P(b,3,      R,  USB1,   LCD,      R,   GPIO,  CTOUT,      R,      R,      0, ND);
 349 LPC_P(b,4,      R,  USB1,   LCD,      R,   GPIO,   CTIN,      R,      R,      0, ND);
 350 LPC_P(b,5,      R,  USB1,   LCD,      R,   GPIO,   CTIN, LCD_ALT,     R,      0, ND);
 351 LPC_P(b,6,      R,  USB1,   LCD,      R,   GPIO,   CTIN, LCD_ALT,     R, ADC0|6, ND);
 352 LPC_P(c,0,      R,  USB1,     R,   ENET,    LCD,      R,      R,  SDMMC, ADC1|1, ND);
 353 LPC_P(c,1,   USB1,     R, UART1,   ENET,   GPIO,      R, TIMER3,  SDMMC,      0, ND);
 354 LPC_P(c,2,   USB1,     R, UART1,   ENET,   GPIO,      R,      R,  SDMMC,      0, ND);
 355 LPC_P(c,3,   USB1,     R, UART1,   ENET,   GPIO,      R,      R,  SDMMC, ADC1|0, ND);
 356 LPC_P(c,4,      R,  USB1,     R,   ENET,   GPIO,      R, TIMER3,  SDMMC,      0, ND);
 357 LPC_P(c,5,      R,  USB1,     R,   ENET,   GPIO,      R, TIMER3,  SDMMC,      0, ND);
 358 LPC_P(c,6,      R,  USB1,     R,   ENET,   GPIO,      R, TIMER3,  SDMMC,      0, ND);
 359 LPC_P(c,7,      R,  USB1,     R,   ENET,   GPIO,      R, TIMER3,  SDMMC,      0, ND);
 360 LPC_P(c,8,      R,  USB1,     R,   ENET,   GPIO,      R, TIMER3,  SDMMC,      0, ND);
 361 LPC_P(c,9,      R,  USB1,     R,   ENET,   GPIO,      R, TIMER3,  SDMMC,      0, ND);
 362 LPC_P(c,10,     R,  USB1, UART1,      R,   GPIO,      R, TIMER3,  SDMMC,      0, ND);
 363 LPC_P(c,11,     R,  USB1, UART1,      R,   GPIO,      R,      R,  SDMMC,      0, ND);
 364 LPC_P(c,12,     R,     R, UART1,      R,   GPIO,  SGPIO, I2S0_TX_SDA,SDMMC,   0, ND);
 365 LPC_P(c,13,     R,     R, UART1,      R,   GPIO,  SGPIO, I2S0_TX_WS, SDMMC,   0, ND);
 366 LPC_P(c,14,     R,     R, UART1,      R,   GPIO,  SGPIO,   ENET,  SDMMC,      0, ND);
 367 LPC_P(d,0,      R, CTOUT,   EMC,      R,   GPIO,      R,      R,  SGPIO,      0, ND);
 368 LPC_P(d,1,      R,     R,   EMC,      R,   GPIO,  SDMMC,      R,  SGPIO,      0, ND);
 369 LPC_P(d,2,      R, CTOUT,   EMC,      R,   GPIO,      R,      R,  SGPIO,      0, ND);
 370 LPC_P(d,3,      R, CTOUT,   EMC,      R,   GPIO,      R,      R,  SGPIO,      0, ND);
 371 LPC_P(d,4,      R, CTOUT,   EMC,      R,   GPIO,      R,      R,  SGPIO,      0, ND);
 372 LPC_P(d,5,      R, CTOUT,   EMC,      R,   GPIO,      R,      R,  SGPIO,      0, ND);
 373 LPC_P(d,6,      R, CTOUT,   EMC,      R,   GPIO,      R,      R,  SGPIO,      0, ND);
 374 LPC_P(d,7,      R,  CTIN,   EMC,      R,   GPIO,      R,      R,  SGPIO,      0, ND);
 375 LPC_P(d,8,      R,  CTIN,   EMC,      R,   GPIO,      R,      R,  SGPIO,      0, ND);
 376 LPC_P(d,9,      R, CTOUT,   EMC,      R,   GPIO,      R,      R,  SGPIO,      0, ND);
 377 LPC_P(d,10,     R,  CTIN,   EMC,      R,   GPIO,      R,      R,      R,      0, ND);
 378 LPC_P(d,11,     R,     R,   EMC,      R,   GPIO,   USB1,  CTOUT,      R,      0, ND);
 379 LPC_P(d,12,     R,     R,   EMC,      R,   GPIO,      R,  CTOUT,      R,      0, ND);
 380 LPC_P(d,13,     R,  CTIN,   EMC,      R,   GPIO,      R,  CTOUT,      R,      0, ND);
 381 LPC_P(d,14,     R,     R,   EMC,      R,   GPIO,      R,  CTOUT,      R,      0, ND);
 382 LPC_P(d,15,     R,     R,   EMC,      R,   GPIO,  SDMMC,  CTOUT,      R,      0, ND);
 383 LPC_P(d,16,     R,     R,   EMC,      R,   GPIO,  SDMMC,  CTOUT,      R,      0, ND);
 384 LPC_P(e,0,      R,     R,     R,    EMC,   GPIO,   CAN1,      R,      R,      0, ND);
 385 LPC_P(e,1,      R,     R,     R,    EMC,   GPIO,   CAN1,      R,      R,      0, ND);
 386 LPC_P(e,2,ADCTRIG,  CAN0,     R,    EMC,   GPIO,      R,      R,      R,      0, ND);
 387 LPC_P(e,3,      R,  CAN0,ADCTRIG,   EMC,   GPIO,      R,      R,      R,      0, ND);
 388 LPC_P(e,4,      R,   NMI,     R,    EMC,   GPIO,      R,      R,      R,      0, ND);
 389 LPC_P(e,5,      R, CTOUT, UART1,    EMC,   GPIO,      R,      R,      R,      0, ND);
 390 LPC_P(e,6,      R, CTOUT, UART1,    EMC,   GPIO,      R,      R,      R,      0, ND);
 391 LPC_P(e,7,      R, CTOUT, UART1,    EMC,   GPIO,      R,      R,      R,      0, ND);
 392 LPC_P(e,8,      R, CTOUT, UART1,    EMC,   GPIO,      R,      R,      R,      0, ND);
 393 LPC_P(e,9,      R,  CTIN, UART1,    EMC,   GPIO,      R,      R,      R,      0, ND);
 394 LPC_P(e,10,     R,  CTIN, UART1,    EMC,   GPIO,      R,      R,      R,      0, ND);
 395 LPC_P(e,11,     R, CTOUT, UART1,    EMC,   GPIO,      R,      R,      R,      0, ND);
 396 LPC_P(e,12,     R, CTOUT, UART1,    EMC,   GPIO,      R,      R,      R,      0, ND);
 397 LPC_P(e,13,     R, CTOUT,  I2C1,    EMC,   GPIO,      R,      R,      R,      0, ND);
 398 LPC_P(e,14,     R,     R,     R,    EMC,   GPIO,      R,      R,      R,      0, ND);
 399 LPC_P(e,15,     R, CTOUT,  I2C1,    EMC,   GPIO,      R,      R,      R,      0, ND);
 400 LPC_P(f,0,   SSP0, CLKIN,     R,      R,      R,      R,      R,   I2S1,      0, ND);
 401 LPC_P(f,1,      R,     R,  SSP0,      R,   GPIO,      R,  SGPIO,      R,      0, ND);
 402 LPC_P(f,2,      R, UART3,  SSP0,      R,   GPIO,      R,  SGPIO,      R,      0, ND);
 403 LPC_P(f,3,      R, UART3,  SSP0,      R,   GPIO,      R,  SGPIO,      R,      0, ND);
 404 LPC_P(f,4,   SSP1, CLKIN, TRACE,      R,      R, R, I2S0_TX_MCLK,I2S0_RX_SCK, 0, ND);
 405 LPC_P(f,5,      R, UART3,  SSP1,  TRACE,   GPIO,      R,  SGPIO,      R, ADC1|4, ND);
 406 LPC_P(f,6,      R, UART3,  SSP1,  TRACE,   GPIO,      R,  SGPIO,   I2S1, ADC1|3, ND);
 407 LPC_P(f,7,      R, UART3,  SSP1,  TRACE,   GPIO,      R,  SGPIO,   I2S1, ADC1|7, ND);
 408 LPC_P(f,8,      R, UART0,  CTIN,  TRACE,   GPIO,      R,  SGPIO,      R, ADC0|2, ND);
 409 LPC_P(f,9,      R, UART0, CTOUT,      R,   GPIO,      R,  SGPIO,      R, ADC1|2, ND);
 410 LPC_P(f,10,     R, UART0,     R,      R,   GPIO,      R,  SDMMC,      R, ADC0|5, ND);
 411 LPC_P(f,11,     R, UART0,     R,      R,   GPIO,      R,  SDMMC,      R, ADC1|5, ND);
 412
 413 /*    Pin      Offset FUNC0  FUNC1  FUNC2  FUNC3  FUNC4    FUNC5   FUNC6      FUNC7 ANALOG TYPE */
 414 LPC_N(clk0,     0xc00, EMC, CLKOUT,   R,     R,  SDMMC,   EMC_ALT,  SSP1,      ENET,  0, HS);
 415 LPC_N(clk1,     0xc04, EMC, CLKOUT,   R,     R,      R,   CGU_OUT,   R,        I2S1,  0, HS);
 416 LPC_N(clk2,     0xc08, EMC, CLKOUT,   R,     R,  SDMMC,   EMC_ALT,I2S0_TX_MCLK,I2S1,  0, HS);
 417 LPC_N(clk3,     0xc0c, EMC, CLKOUT,   R,     R,      R,   CGU_OUT,   R,        I2S1,  0, HS);
 418 LPC_N(usb1_dm,  0xc80, R,      R,     R,     R,      R,      R,      R,          R,   0, USB1);
 419 LPC_N(usb1_dp,  0xc80, R,      R,     R,     R,      R,      R,      R,          R,   0, USB1);
 420 LPC_N(i2c0_scl, 0xc84, R,      R,     R,     R,      R,      R,      R,          R,   0, I2C0);
 421 LPC_N(i2c0_sda, 0xc84, R,      R,     R,     R,      R,      R,      R,          R,   0, I2C0);
 422
 423 #define LPC18XX_PIN_P(port, pin) {                      \
 424         .number = 0x##port * 32 + pin,                  \
 425         .name = "p"#port"_"#pin,                        \
 426         .drv_data = &lpc18xx_pin_p##port##_##pin        \
 427 }
 428
 429 /* Pin numbers for special pins */
 430 enum {
 431         PIN_CLK0 = 600,
 432         PIN_CLK1,
 433         PIN_CLK2,
 434         PIN_CLK3,
 435         PIN_USB1_DM,
 436         PIN_USB1_DP,
 437         PIN_I2C0_SCL,
 438         PIN_I2C0_SDA,
 439 };
 440
 441 #define LPC18XX_PIN(pname, n) {                         \
 442         .number = n,                                    \
 443         .name = #pname,                                 \
 444         .drv_data = &lpc18xx_pin_##pname                \
 445 }
 446
 447 static const struct pinctrl_pin_desc lpc18xx_pins[] = {
 448         LPC18XX_PIN_P(0,0),
 449         LPC18XX_PIN_P(0,1),
 450         LPC18XX_PIN_P(1,0),
 451         LPC18XX_PIN_P(1,1),
 452         LPC18XX_PIN_P(1,2),
 453         LPC18XX_PIN_P(1,3),
 454         LPC18XX_PIN_P(1,4),
 455         LPC18XX_PIN_P(1,5),
 456         LPC18XX_PIN_P(1,6),
 457         LPC18XX_PIN_P(1,7),
 458         LPC18XX_PIN_P(1,8),
 459         LPC18XX_PIN_P(1,9),
 460         LPC18XX_PIN_P(1,10),
 461         LPC18XX_PIN_P(1,11),
 462         LPC18XX_PIN_P(1,12),
 463         LPC18XX_PIN_P(1,13),
 464         LPC18XX_PIN_P(1,14),
 465         LPC18XX_PIN_P(1,15),
 466         LPC18XX_PIN_P(1,16),
 467         LPC18XX_PIN_P(1,17),
 468         LPC18XX_PIN_P(1,18),
 469         LPC18XX_PIN_P(1,19),
 470         LPC18XX_PIN_P(1,20),
 471         LPC18XX_PIN_P(2,0),
 472         LPC18XX_PIN_P(2,1),
 473         LPC18XX_PIN_P(2,2),
 474         LPC18XX_PIN_P(2,3),
 475         LPC18XX_PIN_P(2,4),
 476         LPC18XX_PIN_P(2,5),
 477         LPC18XX_PIN_P(2,6),
 478         LPC18XX_PIN_P(2,7),
 479         LPC18XX_PIN_P(2,8),
 480         LPC18XX_PIN_P(2,9),
 481         LPC18XX_PIN_P(2,10),
 482         LPC18XX_PIN_P(2,11),
 483         LPC18XX_PIN_P(2,12),
 484         LPC18XX_PIN_P(2,13),
 485         LPC18XX_PIN_P(3,0),
 486         LPC18XX_PIN_P(3,1),
 487         LPC18XX_PIN_P(3,2),
 488         LPC18XX_PIN_P(3,3),
 489         LPC18XX_PIN_P(3,4),
 490         LPC18XX_PIN_P(3,5),
 491         LPC18XX_PIN_P(3,6),
 492         LPC18XX_PIN_P(3,7),
 493         LPC18XX_PIN_P(3,8),
 494         LPC18XX_PIN_P(4,0),
 495         LPC18XX_PIN_P(4,1),
 496         LPC18XX_PIN_P(4,2),
 497         LPC18XX_PIN_P(4,3),
 498         LPC18XX_PIN_P(4,4),
 499         LPC18XX_PIN_P(4,5),
 500         LPC18XX_PIN_P(4,6),
 501         LPC18XX_PIN_P(4,7),
 502         LPC18XX_PIN_P(4,8),
 503         LPC18XX_PIN_P(4,9),
 504         LPC18XX_PIN_P(4,10),
 505         LPC18XX_PIN_P(5,0),
 506         LPC18XX_PIN_P(5,1),
 507         LPC18XX_PIN_P(5,2),
 508         LPC18XX_PIN_P(5,3),
 509         LPC18XX_PIN_P(5,4),
 510         LPC18XX_PIN_P(5,5),
 511         LPC18XX_PIN_P(5,6),
 512         LPC18XX_PIN_P(5,7),
 513         LPC18XX_PIN_P(6,0),
 514         LPC18XX_PIN_P(6,1),
 515         LPC18XX_PIN_P(6,2),
 516         LPC18XX_PIN_P(6,3),
 517         LPC18XX_PIN_P(6,4),
 518         LPC18XX_PIN_P(6,5),
 519         LPC18XX_PIN_P(6,6),
 520         LPC18XX_PIN_P(6,7),
 521         LPC18XX_PIN_P(6,8),
 522         LPC18XX_PIN_P(6,9),
 523         LPC18XX_PIN_P(6,10),
 524         LPC18XX_PIN_P(6,11),
 525         LPC18XX_PIN_P(6,12),
 526         LPC18XX_PIN_P(7,0),
 527         LPC18XX_PIN_P(7,1),
 528         LPC18XX_PIN_P(7,2),
 529         LPC18XX_PIN_P(7,3),
 530         LPC18XX_PIN_P(7,4),
 531         LPC18XX_PIN_P(7,5),
 532         LPC18XX_PIN_P(7,6),
 533         LPC18XX_PIN_P(7,7),
 534         LPC18XX_PIN_P(8,0),
 535         LPC18XX_PIN_P(8,1),
 536         LPC18XX_PIN_P(8,2),
 537         LPC18XX_PIN_P(8,3),
 538         LPC18XX_PIN_P(8,4),
 539         LPC18XX_PIN_P(8,5),
 540         LPC18XX_PIN_P(8,6),
 541         LPC18XX_PIN_P(8,7),
 542         LPC18XX_PIN_P(8,8),
 543         LPC18XX_PIN_P(9,0),
 544         LPC18XX_PIN_P(9,1),
 545         LPC18XX_PIN_P(9,2),
 546         LPC18XX_PIN_P(9,3),
 547         LPC18XX_PIN_P(9,4),
 548         LPC18XX_PIN_P(9,5),
 549         LPC18XX_PIN_P(9,6),
 550         LPC18XX_PIN_P(a,0),
 551         LPC18XX_PIN_P(a,1),
 552         LPC18XX_PIN_P(a,2),
 553         LPC18XX_PIN_P(a,3),
 554         LPC18XX_PIN_P(a,4),
 555         LPC18XX_PIN_P(b,0),
 556         LPC18XX_PIN_P(b,1),
 557         LPC18XX_PIN_P(b,2),
 558         LPC18XX_PIN_P(b,3),
 559         LPC18XX_PIN_P(b,4),
 560         LPC18XX_PIN_P(b,5),
 561         LPC18XX_PIN_P(b,6),
 562         LPC18XX_PIN_P(c,0),
 563         LPC18XX_PIN_P(c,1),
 564         LPC18XX_PIN_P(c,2),
 565         LPC18XX_PIN_P(c,3),
 566         LPC18XX_PIN_P(c,4),
 567         LPC18XX_PIN_P(c,5),
 568         LPC18XX_PIN_P(c,6),
 569         LPC18XX_PIN_P(c,7),
 570         LPC18XX_PIN_P(c,8),
 571         LPC18XX_PIN_P(c,9),
 572         LPC18XX_PIN_P(c,10),
 573         LPC18XX_PIN_P(c,11),
 574         LPC18XX_PIN_P(c,12),
 575         LPC18XX_PIN_P(c,13),
 576         LPC18XX_PIN_P(c,14),
 577         LPC18XX_PIN_P(d,0),
 578         LPC18XX_PIN_P(d,1),
 579         LPC18XX_PIN_P(d,2),
 580         LPC18XX_PIN_P(d,3),
 581         LPC18XX_PIN_P(d,4),
 582         LPC18XX_PIN_P(d,5),
 583         LPC18XX_PIN_P(d,6),
 584         LPC18XX_PIN_P(d,7),
 585         LPC18XX_PIN_P(d,8),
 586         LPC18XX_PIN_P(d,9),
 587         LPC18XX_PIN_P(d,10),
 588         LPC18XX_PIN_P(d,11),
 589         LPC18XX_PIN_P(d,12),
 590         LPC18XX_PIN_P(d,13),
 591         LPC18XX_PIN_P(d,14),
 592         LPC18XX_PIN_P(d,15),
 593         LPC18XX_PIN_P(d,16),
 594         LPC18XX_PIN_P(e,0),
 595         LPC18XX_PIN_P(e,1),
 596         LPC18XX_PIN_P(e,2),
 597         LPC18XX_PIN_P(e,3),
 598         LPC18XX_PIN_P(e,4),
 599         LPC18XX_PIN_P(e,5),
 600         LPC18XX_PIN_P(e,6),
 601         LPC18XX_PIN_P(e,7),
 602         LPC18XX_PIN_P(e,8),
 603         LPC18XX_PIN_P(e,9),
 604         LPC18XX_PIN_P(e,10),
 605         LPC18XX_PIN_P(e,11),
 606         LPC18XX_PIN_P(e,12),
 607         LPC18XX_PIN_P(e,13),
 608         LPC18XX_PIN_P(e,14),
 609         LPC18XX_PIN_P(e,15),
 610         LPC18XX_PIN_P(f,0),
 611         LPC18XX_PIN_P(f,1),
 612         LPC18XX_PIN_P(f,2),
 613         LPC18XX_PIN_P(f,3),
 614         LPC18XX_PIN_P(f,4),
 615         LPC18XX_PIN_P(f,5),
 616         LPC18XX_PIN_P(f,6),
 617         LPC18XX_PIN_P(f,7),
 618         LPC18XX_PIN_P(f,8),
 619         LPC18XX_PIN_P(f,9),
 620         LPC18XX_PIN_P(f,10),
 621         LPC18XX_PIN_P(f,11),
 622
 623         LPC18XX_PIN(clk0, PIN_CLK0),
 624         LPC18XX_PIN(clk1, PIN_CLK1),
 625         LPC18XX_PIN(clk2, PIN_CLK2),
 626         LPC18XX_PIN(clk3, PIN_CLK3),
 627         LPC18XX_PIN(usb1_dm,  PIN_USB1_DM),
 628         LPC18XX_PIN(usb1_dp,  PIN_USB1_DP),
 629         LPC18XX_PIN(i2c0_scl, PIN_I2C0_SCL),
 630         LPC18XX_PIN(i2c0_sda, PIN_I2C0_SDA),
 631 };
 632
 633 /* PIN_CONFIG_GPIO_PIN_INT: route gpio to the gpio pin interrupt controller */
 634 #define PIN_CONFIG_GPIO_PIN_INT         (PIN_CONFIG_END + 1)
 635
 636 static const struct pinconf_generic_params lpc18xx_params[] = {
 637         {"nxp,gpio-pin-interrupt", PIN_CONFIG_GPIO_PIN_INT, 0},
 638 };
 639
 640 #ifdef CONFIG_DEBUG_FS
 641 static const struct pin_config_item lpc18xx_conf_items[ARRAY_SIZE(lpc18xx_params)] = {
 642         PCONFDUMP(PIN_CONFIG_GPIO_PIN_INT, "gpio pin int", NULL, true),
 643 };
 644 #endif
 645
 646 static int lpc18xx_pconf_get_usb1(enum pin_config_param param, int *arg, u32 reg)
 647 {
 648         switch (param) {
 649         case PIN_CONFIG_LOW_POWER_MODE:
 650                 if (reg & LPC18XX_SCU_USB1_EPWR)
 651                         *arg = 0;
 652                 else
 653                         *arg = 1;
 654                 break;
 655
 656         case PIN_CONFIG_BIAS_DISABLE:
 657                 if (reg & LPC18XX_SCU_USB1_EPD)
 658                         return -EINVAL;
 659                 break;
 660
 661         case PIN_CONFIG_BIAS_PULL_DOWN:
 662                 if (reg & LPC18XX_SCU_USB1_EPD)
 663                         *arg = 1;
 664                 else
 665                         return -EINVAL;
 666                 break;
 667
 668         default:
 669                 return -ENOTSUPP;
 670         }
 671
 672         return 0;
 673 }
 674
 675 static int lpc18xx_pconf_get_i2c0(enum pin_config_param param, int *arg, u32 reg,
 676                                   unsigned pin)
 677 {
 678         u8 shift;
 679
 680         if (pin == PIN_I2C0_SCL)
 681                 shift = LPC18XX_SCU_I2C0_SCL_SHIFT;
 682         else
 683                 shift = LPC18XX_SCU_I2C0_SDA_SHIFT;
 684
 685         switch (param) {
 686         case PIN_CONFIG_INPUT_ENABLE:
 687                 if (reg & (LPC18XX_SCU_I2C0_EZI << shift))
 688                         *arg = 1;
 689                 else
 690                         return -EINVAL;
 691                 break;
 692
 693         case PIN_CONFIG_SLEW_RATE:
 694                 if (reg & (LPC18XX_SCU_I2C0_EHD << shift))
 695                         *arg = 1;
 696                 else
 697                         *arg = 0;
 698                 break;
 699
 700         case PIN_CONFIG_INPUT_SCHMITT:
 701                 if (reg & (LPC18XX_SCU_I2C0_EFP << shift))
 702                         *arg = 3;
 703                 else
 704                         *arg = 50;
 705                 break;
 706
 707         case PIN_CONFIG_INPUT_SCHMITT_ENABLE:
 708                 if (reg & (LPC18XX_SCU_I2C0_ZIF << shift))
 709                         return -EINVAL;
 710                 else
 711                         *arg = 1;
 712                 break;
 713
 714         default:
 715                 return -ENOTSUPP;
 716         }
 717
 718         return 0;
 719 }
 720
 721 static int lpc18xx_pin_to_gpio(struct pinctrl_dev *pctldev, unsigned pin)
 722 {
 723         struct pinctrl_gpio_range *range;
 724
 725         range = pinctrl_find_gpio_range_from_pin_nolock(pctldev, pin);
 726         if (!range)
 727                 return -EINVAL;
 728
 729         return pin - range->pin_base + range->base;
 730 }
 731
 732 static int lpc18xx_get_pintsel(void __iomem *addr, u32 val, int *arg)
 733 {
 734         u32 reg_val;
 735         int i;
 736
 737         reg_val = readl(addr);
 738         for (i = 0; i < LPC18XX_SCU_IRQ_PER_PINTSEL; i++) {
 739                 if ((reg_val & LPC18XX_SCU_PINTSEL_VAL_MASK) == val)
 740                         return 0;
 741
 742                 reg_val >>= BITS_PER_BYTE;
 743                 *arg += 1;
 744         }
 745
 746         return -EINVAL;
 747 }
 748
 749 static u32 lpc18xx_gpio_to_pintsel_val(int gpio)
 750 {
 751         unsigned int gpio_port, gpio_pin;
 752
 753         gpio_port = gpio / LPC18XX_GPIO_PINS_PER_PORT;
 754         gpio_pin  = gpio % LPC18XX_GPIO_PINS_PER_PORT;
 755
 756         return gpio_pin | (gpio_port << LPC18XX_SCU_PINTSEL_PORT_SHIFT);
 757 }
 758
 759 static int lpc18xx_pconf_get_gpio_pin_int(struct pinctrl_dev *pctldev,
 760                                           int *arg, unsigned pin)
 761 {
 762         struct lpc18xx_scu_data *scu = pinctrl_dev_get_drvdata(pctldev);
 763         int gpio, ret;
 764         u32 val;
 765
 766         gpio = lpc18xx_pin_to_gpio(pctldev, pin);
 767         if (gpio < 0)
 768                 return -ENOTSUPP;
 769
 770         val = lpc18xx_gpio_to_pintsel_val(gpio);
 771
 772         /*
 773          * Check if this pin has been enabled as a interrupt in any of the two
 774          * PINTSEL registers. *arg indicates which interrupt number (0-7).
 775          */
 776         *arg = 0;
 777         ret = lpc18xx_get_pintsel(scu->base + LPC18XX_SCU_PINTSEL0, val, arg);
 778         if (ret == 0)
 779                 return ret;
 780
 781         return lpc18xx_get_pintsel(scu->base + LPC18XX_SCU_PINTSEL1, val, arg);
 782 }
 783
 784 static int lpc18xx_pconf_get_pin(struct pinctrl_dev *pctldev, unsigned param,
 785                                  int *arg, u32 reg, unsigned pin,
 786                                  struct lpc18xx_pin_caps *pin_cap)
 787 {
 788         switch (param) {
 789         case PIN_CONFIG_BIAS_DISABLE:
 790                 if ((!(reg & LPC18XX_SCU_PIN_EPD)) && (reg & LPC18XX_SCU_PIN_EPUN))
 791                         ;
 792                 else
 793                         return -EINVAL;
 794                 break;
 795
 796         case PIN_CONFIG_BIAS_PULL_UP:
 797                 if (reg & LPC18XX_SCU_PIN_EPUN)
 798                         return -EINVAL;
 799                 else
 800                         *arg = 1;
 801                 break;
 802
 803         case PIN_CONFIG_BIAS_PULL_DOWN:
 804                 if (reg & LPC18XX_SCU_PIN_EPD)
 805                         *arg = 1;
 806                 else
 807                         return -EINVAL;
 808                 break;
 809
 810         case PIN_CONFIG_INPUT_ENABLE:
 811                 if (reg & LPC18XX_SCU_PIN_EZI)
 812                         *arg = 1;
 813                 else
 814                         return -EINVAL;
 815                 break;
 816
 817         case PIN_CONFIG_SLEW_RATE:
 818                 if (pin_cap->type == TYPE_HD)
 819                         return -ENOTSUPP;
 820
 821                 if (reg & LPC18XX_SCU_PIN_EHS)
 822                         *arg = 1;
 823                 else
 824                         *arg = 0;
 825                 break;
 826
 827         case PIN_CONFIG_INPUT_SCHMITT_ENABLE:
 828                 if (reg & LPC18XX_SCU_PIN_ZIF)
 829                         return -EINVAL;
 830                 else
 831                         *arg = 1;
 832                 break;
 833
 834         case PIN_CONFIG_DRIVE_STRENGTH:
 835                 if (pin_cap->type != TYPE_HD)
 836                         return -ENOTSUPP;
 837
 838                 *arg = (reg & LPC18XX_SCU_PIN_EHD_MASK) >> LPC18XX_SCU_PIN_EHD_POS;
 839                 switch (*arg) {
 840                 case 3: *arg += 5;
 841                         fallthrough;
 842                 case 2: *arg += 5;
 843                         fallthrough;
 844                 case 1: *arg += 3;
 845                         fallthrough;
 846                 case 0: *arg += 4;
 847                 }
 848                 break;
 849
 850         case PIN_CONFIG_GPIO_PIN_INT:
 851                 return lpc18xx_pconf_get_gpio_pin_int(pctldev, arg, pin);
 852
 853         default:
 854                 return -ENOTSUPP;
 855         }
 856
 857         return 0;
 858 }
 859
 860 static struct lpc18xx_pin_caps *lpc18xx_get_pin_caps(unsigned pin)
 861 {
 862         int i;
 863
 864         for (i = 0; i < ARRAY_SIZE(lpc18xx_pins); i++) {
 865                 if (lpc18xx_pins[i].number == pin)
 866                         return lpc18xx_pins[i].drv_data;
 867         }
 868
 869         return NULL;
 870 }
 871
 872 static int lpc18xx_pconf_get(struct pinctrl_dev *pctldev, unsigned pin,
 873                              unsigned long *config)
 874 {
 875         struct lpc18xx_scu_data *scu = pinctrl_dev_get_drvdata(pctldev);
 876         enum pin_config_param param = pinconf_to_config_param(*config);
 877         struct lpc18xx_pin_caps *pin_cap;
 878         int ret, arg = 0;
 879         u32 reg;
 880
 881         pin_cap = lpc18xx_get_pin_caps(pin);
 882         if (!pin_cap)
 883                 return -EINVAL;
 884
 885         reg = readl(scu->base + pin_cap->offset);
 886
 887         if (pin_cap->type == TYPE_I2C0)
 888                 ret = lpc18xx_pconf_get_i2c0(param, &arg, reg, pin);
 889         else if (pin_cap->type == TYPE_USB1)
 890                 ret = lpc18xx_pconf_get_usb1(param, &arg, reg);
 891         else
 892                 ret = lpc18xx_pconf_get_pin(pctldev, param, &arg, reg, pin, pin_cap);
 893
 894         if (ret < 0)
 895                 return ret;
 896
 897         *config = pinconf_to_config_packed(param, (u16)arg);
 898
 899         return 0;
 900 }
 901
 902 static int lpc18xx_pconf_set_usb1(struct pinctrl_dev *pctldev,
 903                                   enum pin_config_param param,
 904                                   u32 param_val, u32 *reg)
 905 {
 906         switch (param) {
 907         case PIN_CONFIG_LOW_POWER_MODE:
 908                 if (param_val)
 909                         *reg &= ~LPC18XX_SCU_USB1_EPWR;
 910                 else
 911                         *reg |= LPC18XX_SCU_USB1_EPWR;
 912                 break;
 913
 914         case PIN_CONFIG_BIAS_DISABLE:
 915                 *reg &= ~LPC18XX_SCU_USB1_EPD;
 916                 break;
 917
 918         case PIN_CONFIG_BIAS_PULL_DOWN:
 919                 *reg |= LPC18XX_SCU_USB1_EPD;
 920                 break;
 921
 922         default:
 923                 dev_err(pctldev->dev, "Property not supported\n");
 924                 return -ENOTSUPP;
 925         }
 926
 927         return 0;
 928 }
 929
 930 static int lpc18xx_pconf_set_i2c0(struct pinctrl_dev *pctldev,
 931                                   enum pin_config_param param,
 932                                   u32 param_val, u32 *reg,
 933                                   unsigned pin)
 934 {
 935         u8 shift;
 936
 937         if (pin == PIN_I2C0_SCL)
 938                 shift = LPC18XX_SCU_I2C0_SCL_SHIFT;
 939         else
 940                 shift = LPC18XX_SCU_I2C0_SDA_SHIFT;
 941
 942         switch (param) {
 943         case PIN_CONFIG_INPUT_ENABLE:
 944                 if (param_val)
 945                         *reg |= (LPC18XX_SCU_I2C0_EZI << shift);
 946                 else
 947                         *reg &= ~(LPC18XX_SCU_I2C0_EZI << shift);
 948                 break;
 949
 950         case PIN_CONFIG_SLEW_RATE:
 951                 if (param_val)
 952                         *reg |= (LPC18XX_SCU_I2C0_EHD << shift);
 953                 else
 954                         *reg &= ~(LPC18XX_SCU_I2C0_EHD << shift);
 955                 break;
 956
 957         case PIN_CONFIG_INPUT_SCHMITT:
 958                 if (param_val == 3)
 959                         *reg |= (LPC18XX_SCU_I2C0_EFP << shift);
 960                 else if (param_val == 50)
 961                         *reg &= ~(LPC18XX_SCU_I2C0_EFP << shift);
 962                 else
 963                         return -ENOTSUPP;
 964                 break;
 965
 966         case PIN_CONFIG_INPUT_SCHMITT_ENABLE:
 967                 if (param_val)
 968                         *reg &= ~(LPC18XX_SCU_I2C0_ZIF << shift);
 969                 else
 970                         *reg |= (LPC18XX_SCU_I2C0_ZIF << shift);
 971                 break;
 972
 973         default:
 974                 dev_err(pctldev->dev, "Property not supported\n");
 975                 return -ENOTSUPP;
 976         }
 977
 978         return 0;
 979 }
 980
 981 static int lpc18xx_pconf_set_gpio_pin_int(struct pinctrl_dev *pctldev,
 982                                           u32 param_val, unsigned pin)
 983 {
 984         struct lpc18xx_scu_data *scu = pinctrl_dev_get_drvdata(pctldev);
 985         u32 val, reg_val, reg_offset = LPC18XX_SCU_PINTSEL0;
 986         int gpio;
 987
 988         if (param_val >= LPC18XX_GPIO_PIN_INT_MAX)
 989                 return -EINVAL;
 990
 991         gpio = lpc18xx_pin_to_gpio(pctldev, pin);
 992         if (gpio < 0)
 993                 return -ENOTSUPP;
 994
 995         val = lpc18xx_gpio_to_pintsel_val(gpio);
 996
 997         reg_offset += (param_val / LPC18XX_SCU_IRQ_PER_PINTSEL) * sizeof(u32);
 998
 999         reg_val = readl(scu->base + reg_offset);
1000         reg_val &= ~LPC18XX_SCU_PINTSEL_VAL(LPC18XX_SCU_PINTSEL_VAL_MASK, param_val);
1001         reg_val |= LPC18XX_SCU_PINTSEL_VAL(val, param_val);
1002         writel(reg_val, scu->base + reg_offset);
1003
1004         return 0;
1005 }
1006
1007 static int lpc18xx_pconf_set_pin(struct pinctrl_dev *pctldev, unsigned param,
1008                                  u32 param_val, u32 *reg, unsigned pin,
1009                                  struct lpc18xx_pin_caps *pin_cap)
1010 {
1011         switch (param) {
1012         case PIN_CONFIG_BIAS_DISABLE:
1013                 *reg &= ~LPC18XX_SCU_PIN_EPD;
1014                 *reg |= LPC18XX_SCU_PIN_EPUN;
1015                 break;
1016
1017         case PIN_CONFIG_BIAS_PULL_UP:
1018                 *reg &= ~LPC18XX_SCU_PIN_EPUN;
1019                 break;
1020
1021         case PIN_CONFIG_BIAS_PULL_DOWN:
1022                 *reg |= LPC18XX_SCU_PIN_EPD;
1023                 break;
1024
1025         case PIN_CONFIG_INPUT_ENABLE:
1026                 if (param_val)
1027                         *reg |= LPC18XX_SCU_PIN_EZI;
1028                 else
1029                         *reg &= ~LPC18XX_SCU_PIN_EZI;
1030                 break;
1031
1032         case PIN_CONFIG_SLEW_RATE:
1033                 if (pin_cap->type == TYPE_HD) {
1034                         dev_err(pctldev->dev, "Slew rate unsupported on high-drive pins\n");
1035                         return -ENOTSUPP;
1036                 }
1037
1038                 if (param_val == 0)
1039                         *reg &= ~LPC18XX_SCU_PIN_EHS;
1040                 else
1041                         *reg |= LPC18XX_SCU_PIN_EHS;
1042                 break;
1043
1044         case PIN_CONFIG_INPUT_SCHMITT_ENABLE:
1045                 if (param_val)
1046                         *reg &= ~LPC18XX_SCU_PIN_ZIF;
1047                 else
1048                         *reg |= LPC18XX_SCU_PIN_ZIF;
1049                 break;
1050
1051         case PIN_CONFIG_DRIVE_STRENGTH:
1052                 if (pin_cap->type != TYPE_HD) {
1053                         dev_err(pctldev->dev, "Drive strength available only on high-drive pins\n");
1054                         return -ENOTSUPP;
1055                 }
1056                 *reg &= ~LPC18XX_SCU_PIN_EHD_MASK;
1057
1058                 switch (param_val) {
1059                 case 20: param_val -= 5;
1060                         fallthrough;
1061                 case 14: param_val -= 5;
1062                         fallthrough;
1063                 case  8: param_val -= 3;
1064                         fallthrough;
1065                 case  4: param_val -= 4;
1066                          break;
1067                 default:
1068                         dev_err(pctldev->dev, "Drive strength %u unsupported\n", param_val);
1069                         return -ENOTSUPP;
1070                 }
1071                 *reg |= param_val << LPC18XX_SCU_PIN_EHD_POS;
1072                 break;
1073
1074         case PIN_CONFIG_GPIO_PIN_INT:
1075                 return lpc18xx_pconf_set_gpio_pin_int(pctldev, param_val, pin);
1076
1077         default:
1078                 dev_err(pctldev->dev, "Property not supported\n");
1079                 return -ENOTSUPP;
1080         }
1081
1082         return 0;
1083 }
1084
1085 static int lpc18xx_pconf_set(struct pinctrl_dev *pctldev, unsigned pin,
1086                              unsigned long *configs, unsigned num_configs)
1087 {
1088         struct lpc18xx_scu_data *scu = pinctrl_dev_get_drvdata(pctldev);
1089         struct lpc18xx_pin_caps *pin_cap;
1090         enum pin_config_param param;
1091         u32 param_val;
1092         u32 reg;
1093         int ret;
1094         int i;
1095
1096         pin_cap = lpc18xx_get_pin_caps(pin);
1097         if (!pin_cap)
1098                 return -EINVAL;
1099
1100         reg = readl(scu->base + pin_cap->offset);
1101
1102         for (i = 0; i < num_configs; i++) {
1103                 param = pinconf_to_config_param(configs[i]);
1104                 param_val = pinconf_to_config_argument(configs[i]);
1105
1106                 if (pin_cap->type == TYPE_I2C0)
1107                         ret = lpc18xx_pconf_set_i2c0(pctldev, param, param_val, &reg, pin);
1108                 else if (pin_cap->type == TYPE_USB1)
1109                         ret = lpc18xx_pconf_set_usb1(pctldev, param, param_val, &reg);
1110                 else
1111                         ret = lpc18xx_pconf_set_pin(pctldev, param, param_val, &reg, pin, pin_cap);
1112
1113                 if (ret)
1114                         return ret;
1115         }
1116
1117         writel(reg, scu->base + pin_cap->offset);
1118
1119         return 0;
1120 }
1121
1122 static const struct pinconf_ops lpc18xx_pconf_ops = {
1123         .is_generic     = true,
1124         .pin_config_get = lpc18xx_pconf_get,
1125         .pin_config_set = lpc18xx_pconf_set,
1126 };
1127
1128 static int lpc18xx_pmx_get_funcs_count(struct pinctrl_dev *pctldev)
1129 {
1130         return ARRAY_SIZE(lpc18xx_function_names);
1131 }
1132
1133 static const char *lpc18xx_pmx_get_func_name(struct pinctrl_dev *pctldev,
1134                                              unsigned function)
1135 {
1136         return lpc18xx_function_names[function];
1137 }
1138
1139 static int lpc18xx_pmx_get_func_groups(struct pinctrl_dev *pctldev,
1140                                        unsigned function,
1141                                        const char *const **groups,
1142                                        unsigned *const num_groups)
1143 {
1144         struct lpc18xx_scu_data *scu = pinctrl_dev_get_drvdata(pctldev);
1145
1146         *groups  = scu->func[function].groups;
1147         *num_groups = scu->func[function].ngroups;
1148
1149         return 0;
1150 }
1151
1152 static int lpc18xx_pmx_set(struct pinctrl_dev *pctldev, unsigned function,
1153                            unsigned group)
1154 {
1155         struct lpc18xx_scu_data *scu = pinctrl_dev_get_drvdata(pctldev);
1156         struct lpc18xx_pin_caps *pin = lpc18xx_pins[group].drv_data;
1157         int func;
1158         u32 reg;
1159
1160         /* Dedicated USB1 and I2C0 pins doesn't support muxing */
1161         if (pin->type == TYPE_USB1) {
1162                 if (function == FUNC_USB1)
1163                         return 0;
1164
1165                 goto fail;
1166         }
1167
1168         if (pin->type == TYPE_I2C0) {
1169                 if (function == FUNC_I2C0)
1170                         return 0;
1171
1172                 goto fail;
1173         }
1174
1175         if (function == FUNC_ADC && (pin->analog & LPC18XX_ANALOG_PIN)) {
1176                 u32 offset;
1177
1178                 writel(LPC18XX_SCU_ANALOG_PIN_CFG, scu->base + pin->offset);
1179
1180                 if (LPC18XX_ANALOG_ADC(pin->analog) == 0)
1181                         offset = LPC18XX_SCU_REG_ENAIO0;
1182                 else
1183                         offset = LPC18XX_SCU_REG_ENAIO1;
1184
1185                 reg = readl(scu->base + offset);
1186                 reg |= pin->analog & LPC18XX_ANALOG_BIT_MASK;
1187                 writel(reg, scu->base + offset);
1188
1189                 return 0;
1190         }
1191
1192         if (function == FUNC_DAC && (pin->analog & LPC18XX_ANALOG_PIN)) {
1193                 writel(LPC18XX_SCU_ANALOG_PIN_CFG, scu->base + pin->offset);
1194
1195                 reg = readl(scu->base + LPC18XX_SCU_REG_ENAIO2);
1196                 reg |= LPC18XX_SCU_REG_ENAIO2_DAC;
1197                 writel(reg, scu->base + LPC18XX_SCU_REG_ENAIO2);
1198
1199                 return 0;
1200         }
1201
1202         for (func = 0; func < LPC18XX_SCU_FUNC_PER_PIN; func++) {
1203                 if (function == pin->functions[func])
1204                         break;
1205         }
1206
1207         if (func >= LPC18XX_SCU_FUNC_PER_PIN)
1208                 goto fail;
1209
1210         reg = readl(scu->base + pin->offset);
1211         reg &= ~LPC18XX_SCU_PIN_MODE_MASK;
1212         writel(reg | func, scu->base + pin->offset);
1213
1214         return 0;
1215 fail:
1216         dev_err(pctldev->dev, "Pin %s can't be %s\n", lpc18xx_pins[group].name,
1217                                                       lpc18xx_function_names[function]);
1218         return -EINVAL;
1219 }
1220
1221 static const struct pinmux_ops lpc18xx_pmx_ops = {
1222         .get_functions_count    = lpc18xx_pmx_get_funcs_count,
1223         .get_function_name      = lpc18xx_pmx_get_func_name,
1224         .get_function_groups    = lpc18xx_pmx_get_func_groups,
1225         .set_mux                = lpc18xx_pmx_set,
1226 };
1227
1228 static int lpc18xx_pctl_get_groups_count(struct pinctrl_dev *pctldev)
1229 {
1230         return ARRAY_SIZE(lpc18xx_pins);
1231 }
1232
1233 static const char *lpc18xx_pctl_get_group_name(struct pinctrl_dev *pctldev,
1234                                                unsigned group)
1235 {
1236         return lpc18xx_pins[group].name;
1237 }
1238
1239 static int lpc18xx_pctl_get_group_pins(struct pinctrl_dev *pctldev,
1240                                        unsigned group,
1241                                        const unsigned **pins,
1242                                        unsigned *num_pins)
1243 {
1244         *pins = &lpc18xx_pins[group].number;
1245         *num_pins = 1;
1246
1247         return 0;
1248 }
1249
1250 static const struct pinctrl_ops lpc18xx_pctl_ops = {
1251         .get_groups_count       = lpc18xx_pctl_get_groups_count,
1252         .get_group_name         = lpc18xx_pctl_get_group_name,
1253         .get_group_pins         = lpc18xx_pctl_get_group_pins,
1254         .dt_node_to_map         = pinconf_generic_dt_node_to_map_pin,
1255         .dt_free_map            = pinctrl_utils_free_map,
1256 };
1257
1258 static struct pinctrl_desc lpc18xx_scu_desc = {
1259         .name = "lpc18xx/43xx-scu",
1260         .pins = lpc18xx_pins,
1261         .npins = ARRAY_SIZE(lpc18xx_pins),
1262         .pctlops = &lpc18xx_pctl_ops,
1263         .pmxops = &lpc18xx_pmx_ops,
1264         .confops = &lpc18xx_pconf_ops,
1265         .num_custom_params = ARRAY_SIZE(lpc18xx_params),
1266         .custom_params = lpc18xx_params,
1267 #ifdef CONFIG_DEBUG_FS
1268         .custom_conf_items = lpc18xx_conf_items,
1269 #endif
1270         .owner = THIS_MODULE,
1271 };
1272
1273 static bool lpc18xx_valid_pin_function(unsigned pin, unsigned function)
1274 {
1275         struct lpc18xx_pin_caps *p = lpc18xx_pins[pin].drv_data;
1276         int i;
1277
1278         if (function == FUNC_DAC && p->analog == DAC)
1279                 return true;
1280
1281         if (function == FUNC_ADC && p->analog)
1282                 return true;
1283
1284         if (function == FUNC_I2C0 && p->type == TYPE_I2C0)
1285                 return true;
1286
1287         if (function == FUNC_USB1 && p->type == TYPE_USB1)
1288                 return true;
1289
1290         for (i = 0; i < LPC18XX_SCU_FUNC_PER_PIN; i++) {
1291                 if (function == p->functions[i])
1292                         return true;
1293         }
1294
1295         return false;
1296 }
1297
1298 static int lpc18xx_create_group_func_map(struct device *dev,
1299                                          struct lpc18xx_scu_data *scu)
1300 {
1301         u16 pins[ARRAY_SIZE(lpc18xx_pins)];
1302         int func, ngroups, i;
1303
1304         for (func = 0; func < FUNC_MAX; func++) {
1305                 for (ngroups = 0, i = 0; i < ARRAY_SIZE(lpc18xx_pins); i++) {
1306                         if (lpc18xx_valid_pin_function(i, func))
1307                                 pins[ngroups++] = i;
1308                 }
1309
1310                 scu->func[func].ngroups = ngroups;
1311                 scu->func[func].groups = devm_kcalloc(dev,
1312                                                       ngroups, sizeof(char *),
1313                                                       GFP_KERNEL);
1314                 if (!scu->func[func].groups)
1315                         return -ENOMEM;
1316
1317                 for (i = 0; i < ngroups; i++)
1318                         scu->func[func].groups[i] = lpc18xx_pins[pins[i]].name;
1319         }
1320
1321         return 0;
1322 }
1323
1324 static int lpc18xx_scu_probe(struct platform_device *pdev)
1325 {
1326         struct lpc18xx_scu_data *scu;
1327         int ret;
1328
1329         scu = devm_kzalloc(&pdev->dev, sizeof(*scu), GFP_KERNEL);
1330         if (!scu)
1331                 return -ENOMEM;
1332
1333         scu->base = devm_platform_ioremap_resource(pdev, 0);
1334         if (IS_ERR(scu->base))
1335                 return PTR_ERR(scu->base);
1336
1337         scu->clk = devm_clk_get(&pdev->dev, NULL);
1338         if (IS_ERR(scu->clk)) {
1339                 dev_err(&pdev->dev, "Input clock not found.\n");
1340                 return PTR_ERR(scu->clk);
1341         }
1342
1343         ret = lpc18xx_create_group_func_map(&pdev->dev, scu);
1344         if (ret) {
1345                 dev_err(&pdev->dev, "Unable to create group func map.\n");
1346                 return ret;
1347         }
1348
1349         ret = clk_prepare_enable(scu->clk);
1350         if (ret) {
1351                 dev_err(&pdev->dev, "Unable to enable clock.\n");
1352                 return ret;
1353         }
1354
1355         platform_set_drvdata(pdev, scu);
1356
1357         scu->pctl = devm_pinctrl_register(&pdev->dev, &lpc18xx_scu_desc, scu);
1358         if (IS_ERR(scu->pctl)) {
1359                 dev_err(&pdev->dev, "Could not register pinctrl driver\n");
1360                 clk_disable_unprepare(scu->clk);
1361                 return PTR_ERR(scu->pctl);
1362         }
1363
1364         return 0;
1365 }
1366
1367 static const struct of_device_id lpc18xx_scu_match[] = {
1368         { .compatible = "nxp,lpc1850-scu" },
1369         {},
1370 };
1371
1372 static struct platform_driver lpc18xx_scu_driver = {
1373         .probe          = lpc18xx_scu_probe,
1374         .driver = {
1375                 .name           = "lpc18xx-scu",
1376                 .of_match_table = lpc18xx_scu_match,
1377                 .suppress_bind_attrs = true,
1378         },
1379 };
1380 builtin_platform_driver(lpc18xx_scu_driver);