drivers/clk/ti/clk-814x.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2
   3 #include <linux/kernel.h>
   4 #include <linux/clk.h>
   5 #include <linux/clk-provider.h>
   6 #include <linux/clk/ti.h>
   7 #include <linux/of_platform.h>
   8 #include <dt-bindings/clock/dm814.h>
   9
  10 #include "clock.h"
  11
  12 static const struct omap_clkctrl_reg_data dm814_default_clkctrl_regs[] __initconst = {
  13         { DM814_USB_OTG_HS_CLKCTRL, NULL, CLKF_SW_SUP, "pll260dcoclkldo" },
  14         { 0 },
  15 };
  16
  17 static const struct omap_clkctrl_reg_data dm814_alwon_clkctrl_regs[] __initconst = {
  18         { DM814_UART1_CLKCTRL, NULL, CLKF_SW_SUP, "sysclk10_ck" },
  19         { DM814_UART2_CLKCTRL, NULL, CLKF_SW_SUP, "sysclk10_ck" },
  20         { DM814_UART3_CLKCTRL, NULL, CLKF_SW_SUP, "sysclk10_ck" },
  21         { DM814_GPIO1_CLKCTRL, NULL, CLKF_SW_SUP, "sysclk6_ck" },
  22         { DM814_GPIO2_CLKCTRL, NULL, CLKF_SW_SUP, "sysclk6_ck" },
  23         { DM814_I2C1_CLKCTRL, NULL, CLKF_SW_SUP, "sysclk10_ck" },
  24         { DM814_I2C2_CLKCTRL, NULL, CLKF_SW_SUP, "sysclk10_ck" },
  25         { DM814_WD_TIMER_CLKCTRL, NULL, CLKF_SW_SUP | CLKF_NO_IDLEST, "sysclk18_ck" },
  26         { DM814_MCSPI1_CLKCTRL, NULL, CLKF_SW_SUP, "sysclk10_ck" },
  27         { DM814_GPMC_CLKCTRL, NULL, CLKF_SW_SUP, "sysclk6_ck" },
  28         { DM814_MPU_CLKCTRL, NULL, CLKF_SW_SUP, "mpu_ck" },
  29         { DM814_RTC_CLKCTRL, NULL, CLKF_SW_SUP | CLKF_NO_IDLEST, "sysclk18_ck" },
  30         { DM814_TPCC_CLKCTRL, NULL, CLKF_SW_SUP, "sysclk4_ck" },
  31         { DM814_TPTC0_CLKCTRL, NULL, CLKF_SW_SUP, "sysclk4_ck" },
  32         { DM814_TPTC1_CLKCTRL, NULL, CLKF_SW_SUP, "sysclk4_ck" },
  33         { DM814_TPTC2_CLKCTRL, NULL, CLKF_SW_SUP, "sysclk4_ck" },
  34         { DM814_TPTC3_CLKCTRL, NULL, CLKF_SW_SUP, "sysclk4_ck" },
  35         { DM814_MMC1_CLKCTRL, NULL, CLKF_SW_SUP, "sysclk8_ck" },
  36         { DM814_MMC2_CLKCTRL, NULL, CLKF_SW_SUP, "sysclk8_ck" },
  37         { DM814_MMC3_CLKCTRL, NULL, CLKF_SW_SUP, "sysclk8_ck" },
  38         { 0 },
  39 };
  40
  41 static const struct
  42 omap_clkctrl_reg_data dm814_alwon_ethernet_clkctrl_regs[] __initconst = {
  43         { 0, NULL, CLKF_SW_SUP, "cpsw_125mhz_gclk" },
  44 };
  45
  46 const struct omap_clkctrl_data dm814_clkctrl_data[] __initconst = {
  47         { 0x48180500, dm814_default_clkctrl_regs },
  48         { 0x48181400, dm814_alwon_clkctrl_regs },
  49         { 0x481815d4, dm814_alwon_ethernet_clkctrl_regs },
  50         { 0 },
  51 };
  52
  53 static struct ti_dt_clk dm814_clks[] = {
  54         DT_CLK(NULL, "timer_sys_ck", "devosc_ck"),
  55         { .node_name = NULL },
  56 };
  57
  58 static bool timer_clocks_initialized;
  59
  60 static int __init dm814x_adpll_early_init(void)
  61 {
  62         struct device_node *np;
  63
  64         if (!timer_clocks_initialized)
  65                 return -ENODEV;
  66
  67         np = of_find_node_by_name(NULL, "pllss");
  68         if (!np) {
  69                 pr_err("Could not find node for plls\n");
  70                 return -ENODEV;
  71         }
  72
  73         of_platform_populate(np, NULL, NULL, NULL);
  74         of_node_put(np);
  75
  76         return 0;
  77 }
  78 core_initcall(dm814x_adpll_early_init);
  79
  80 static const char * const init_clocks[] = {
  81         "pll040clkout",         /* MPU 481c5040.adpll.clkout */
  82         "pll290clkout",         /* DDR 481c5290.adpll.clkout */
  83 };
  84
  85 static int __init dm814x_adpll_enable_init_clocks(void)
  86 {
  87         int i, err;
  88
  89         if (!timer_clocks_initialized)
  90                 return -ENODEV;
  91
  92         for (i = 0; i < ARRAY_SIZE(init_clocks); i++) {
  93                 struct clk *clock;
  94
  95                 clock = clk_get(NULL, init_clocks[i]);
  96                 if (WARN(IS_ERR(clock), "could not find init clock %s\n",
  97                          init_clocks[i]))
  98                         continue;
  99                 err = clk_prepare_enable(clock);
 100                 if (WARN(err, "could not enable init clock %s\n",
 101                          init_clocks[i]))
 102                         continue;
 103         }
 104
 105         return 0;
 106 }
 107 postcore_initcall(dm814x_adpll_enable_init_clocks);
 108
 109 int __init dm814x_dt_clk_init(void)
 110 {
 111         ti_dt_clocks_register(dm814_clks);
 112         omap2_clk_disable_autoidle_all();
 113         ti_clk_add_aliases();
 114         omap2_clk_enable_init_clocks(NULL, 0);
 115         timer_clocks_initialized = true;
 116
 117         return 0;
 118 }