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