drivers/clk/imx/clk-imx6q.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Copyright (C) 2019 DENX Software Engineering
   4  * Lukasz Majewski, DENX Software Engineering, lukma@denx.de
   5  */
   6
   7 #include <common.h>
   8 #include <clk-uclass.h>
   9 #include <dm.h>
  10 #include <log.h>
  11 #include <asm/arch/clock.h>
  12 #include <asm/arch/imx-regs.h>
  13 #include <dt-bindings/clock/imx6qdl-clock.h>
  14
  15 #include "clk.h"
  16
  17 static int imx6q_check_id(ulong id)
  18 {
  19         if (id < IMX6QDL_CLK_DUMMY || id >= IMX6QDL_CLK_END) {
  20                 printf("%s: Invalid clk ID #%lu\n", __func__, id);
  21                 return -EINVAL;
  22         }
  23
  24         return 0;
  25 }
  26
  27 static ulong imx6q_clk_get_rate(struct clk *clk)
  28 {
  29         struct clk *c;
  30         int ret;
  31
  32         debug("%s(#%lu)\n", __func__, clk->id);
  33
  34         ret = imx6q_check_id(clk->id);
  35         if (ret)
  36                 return ret;
  37
  38         ret = clk_get_by_id(clk->id, &c);
  39         if (ret)
  40                 return ret;
  41
  42         return clk_get_rate(c);
  43 }
  44
  45 static ulong imx6q_clk_set_rate(struct clk *clk, unsigned long rate)
  46 {
  47         debug("%s(#%lu), rate: %lu\n", __func__, clk->id, rate);
  48
  49         return rate;
  50 }
  51
  52 static int __imx6q_clk_enable(struct clk *clk, bool enable)
  53 {
  54         struct clk *c;
  55         int ret = 0;
  56
  57         debug("%s(#%lu) en: %d\n", __func__, clk->id, enable);
  58
  59         ret = imx6q_check_id(clk->id);
  60         if (ret)
  61                 return ret;
  62
  63         ret = clk_get_by_id(clk->id, &c);
  64         if (ret)
  65                 return ret;
  66
  67         if (enable)
  68                 ret = clk_enable(c);
  69         else
  70                 ret = clk_disable(c);
  71
  72         return ret;
  73 }
  74
  75 static int imx6q_clk_disable(struct clk *clk)
  76 {
  77         return __imx6q_clk_enable(clk, 0);
  78 }
  79
  80 static int imx6q_clk_enable(struct clk *clk)
  81 {
  82         return __imx6q_clk_enable(clk, 1);
  83 }
  84
  85 static struct clk_ops imx6q_clk_ops = {
  86         .set_rate = imx6q_clk_set_rate,
  87         .get_rate = imx6q_clk_get_rate,
  88         .enable = imx6q_clk_enable,
  89         .disable = imx6q_clk_disable,
  90 };
  91
  92 static const char *const usdhc_sels[] = { "pll2_pfd2_396m", "pll2_pfd0_352m", };
  93 static const char *const periph_sels[]  = { "periph_pre", "periph_clk2", };
  94 static const char *const periph_pre_sels[] = { "pll2_bus", "pll2_pfd2_396m",
  95                                                "pll2_pfd0_352m", "pll2_198m", };
  96
  97 static int imx6q_clk_probe(struct udevice *dev)
  98 {
  99         void *base;
 100
 101         /* Anatop clocks */
 102         base = (void *)ANATOP_BASE_ADDR;
 103
 104         clk_dm(IMX6QDL_CLK_PLL2,
 105                imx_clk_pllv3(IMX_PLLV3_GENERIC, "pll2_bus", "osc",
 106                              base + 0x30, 0x1));
 107         clk_dm(IMX6QDL_CLK_PLL3_USB_OTG,
 108                imx_clk_pllv3(IMX_PLLV3_USB, "pll3_usb_otg", "osc",
 109                              base + 0x10, 0x3));
 110         clk_dm(IMX6QDL_CLK_PLL3_60M,
 111                imx_clk_fixed_factor("pll3_60m",  "pll3_usb_otg",   1, 8));
 112         clk_dm(IMX6QDL_CLK_PLL2_PFD0_352M,
 113                imx_clk_pfd("pll2_pfd0_352m", "pll2_bus", base + 0x100, 0));
 114         clk_dm(IMX6QDL_CLK_PLL2_PFD2_396M,
 115                imx_clk_pfd("pll2_pfd2_396m", "pll2_bus", base + 0x100, 2));
 116
 117         /* CCM clocks */
 118         base = dev_read_addr_ptr(dev);
 119         if (!base)
 120                 return -EINVAL;
 121
 122         clk_dm(IMX6QDL_CLK_USDHC1_SEL,
 123                imx_clk_mux("usdhc1_sel", base + 0x1c, 16, 1,
 124                            usdhc_sels, ARRAY_SIZE(usdhc_sels)));
 125         clk_dm(IMX6QDL_CLK_USDHC2_SEL,
 126                imx_clk_mux("usdhc2_sel", base + 0x1c, 17, 1,
 127                            usdhc_sels, ARRAY_SIZE(usdhc_sels)));
 128         clk_dm(IMX6QDL_CLK_USDHC3_SEL,
 129                imx_clk_mux("usdhc3_sel", base + 0x1c, 18, 1,
 130                            usdhc_sels, ARRAY_SIZE(usdhc_sels)));
 131         clk_dm(IMX6QDL_CLK_USDHC4_SEL,
 132                imx_clk_mux("usdhc4_sel", base + 0x1c, 19, 1,
 133                            usdhc_sels, ARRAY_SIZE(usdhc_sels)));
 134
 135         clk_dm(IMX6QDL_CLK_USDHC1_PODF,
 136                imx_clk_divider("usdhc1_podf", "usdhc1_sel",
 137                                base + 0x24, 11, 3));
 138         clk_dm(IMX6QDL_CLK_USDHC2_PODF,
 139                imx_clk_divider("usdhc2_podf", "usdhc2_sel",
 140                                base + 0x24, 16, 3));
 141         clk_dm(IMX6QDL_CLK_USDHC3_PODF,
 142                imx_clk_divider("usdhc3_podf", "usdhc3_sel",
 143                                base + 0x24, 19, 3));
 144         clk_dm(IMX6QDL_CLK_USDHC4_PODF,
 145                imx_clk_divider("usdhc4_podf", "usdhc4_sel",
 146                                base + 0x24, 22, 3));
 147
 148         clk_dm(IMX6QDL_CLK_ECSPI_ROOT,
 149                imx_clk_divider("ecspi_root", "pll3_60m", base + 0x38, 19, 6));
 150
 151         clk_dm(IMX6QDL_CLK_ECSPI1,
 152                imx_clk_gate2("ecspi1", "ecspi_root", base + 0x6c, 0));
 153         clk_dm(IMX6QDL_CLK_ECSPI2,
 154                imx_clk_gate2("ecspi2", "ecspi_root", base + 0x6c, 2));
 155         clk_dm(IMX6QDL_CLK_ECSPI3,
 156                imx_clk_gate2("ecspi3", "ecspi_root", base + 0x6c, 4));
 157         clk_dm(IMX6QDL_CLK_ECSPI4,
 158                imx_clk_gate2("ecspi4", "ecspi_root", base + 0x6c, 6));
 159         clk_dm(IMX6QDL_CLK_USDHC1,
 160                imx_clk_gate2("usdhc1", "usdhc1_podf", base + 0x80, 2));
 161         clk_dm(IMX6QDL_CLK_USDHC2,
 162                imx_clk_gate2("usdhc2", "usdhc2_podf", base + 0x80, 4));
 163         clk_dm(IMX6QDL_CLK_USDHC3,
 164                imx_clk_gate2("usdhc3", "usdhc3_podf", base + 0x80, 6));
 165         clk_dm(IMX6QDL_CLK_USDHC4,
 166                imx_clk_gate2("usdhc4", "usdhc4_podf", base + 0x80, 8));
 167
 168         clk_dm(IMX6QDL_CLK_PERIPH_PRE,
 169                imx_clk_mux("periph_pre", base + 0x18, 18, 2, periph_pre_sels,
 170                            ARRAY_SIZE(periph_pre_sels)));
 171         clk_dm(IMX6QDL_CLK_PERIPH,
 172                imx_clk_busy_mux("periph",  base + 0x14, 25, 1, base + 0x48,
 173                                 5, periph_sels,  ARRAY_SIZE(periph_sels)));
 174         clk_dm(IMX6QDL_CLK_AHB,
 175                imx_clk_busy_divider("ahb", "periph", base + 0x14, 10, 3,
 176                                     base + 0x48, 1));
 177         clk_dm(IMX6QDL_CLK_IPG,
 178                imx_clk_divider("ipg", "ahb", base + 0x14, 8, 2));
 179         clk_dm(IMX6QDL_CLK_IPG_PER,
 180                imx_clk_divider("ipg_per", "ipg", base + 0x1c, 0, 6));
 181         clk_dm(IMX6QDL_CLK_I2C1,
 182                imx_clk_gate2("i2c1", "ipg_per", base + 0x70, 6));
 183         clk_dm(IMX6QDL_CLK_I2C2,
 184                imx_clk_gate2("i2c2", "ipg_per", base + 0x70, 8));
 185
 186         return 0;
 187 }
 188
 189 static const struct udevice_id imx6q_clk_ids[] = {
 190         { .compatible = "fsl,imx6q-ccm" },
 191         { },
 192 };
 193
 194 U_BOOT_DRIVER(imx6q_clk) = {
 195         .name = "clk_imx6q",
 196         .id = UCLASS_CLK,
 197         .of_match = imx6q_clk_ids,
 198         .ops = &imx6q_clk_ops,
 199         .probe = imx6q_clk_probe,
 200         .flags = DM_FLAG_PRE_RELOC,
 201 };