linux/drivers/clk/imx/clk-imx7ulp.c
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   1// SPDX-License-Identifier: GPL-2.0+
   2/*
   3 * Copyright (C) 2016 Freescale Semiconductor, Inc.
   4 * Copyright 2017~2018 NXP
   5 *
   6 * Author: Dong Aisheng <aisheng.dong@nxp.com>
   7 *
   8 */
   9
  10#include <dt-bindings/clock/imx7ulp-clock.h>
  11#include <linux/clk-provider.h>
  12#include <linux/err.h>
  13#include <linux/init.h>
  14#include <linux/io.h>
  15#include <linux/of.h>
  16#include <linux/of_address.h>
  17#include <linux/platform_device.h>
  18#include <linux/slab.h>
  19
  20#include "clk.h"
  21
  22static const char * const pll_pre_sels[]        = { "sosc", "firc", };
  23static const char * const spll_pfd_sels[]       = { "spll_pfd0", "spll_pfd1", "spll_pfd2", "spll_pfd3", };
  24static const char * const spll_sels[]           = { "spll", "spll_pfd_sel", };
  25static const char * const apll_pfd_sels[]       = { "apll_pfd0", "apll_pfd1", "apll_pfd2", "apll_pfd3", };
  26static const char * const apll_sels[]           = { "apll", "apll_pfd_sel", };
  27static const char * const scs_sels[]            = { "dummy", "sosc", "sirc", "firc", "dummy", "apll_sel", "spll_sel", "dummy", };
  28static const char * const ddr_sels[]            = { "apll_pfd_sel", "dummy", "dummy", "dummy", };
  29static const char * const nic_sels[]            = { "firc", "ddr_clk", };
  30static const char * const periph_plat_sels[]    = { "dummy", "nic1_bus_clk", "nic1_clk", "ddr_clk", "apll_pfd2", "apll_pfd1", "apll_pfd0", "upll", };
  31static const char * const periph_bus_sels[]     = { "dummy", "sosc_bus_clk", "dummy", "firc_bus_clk", "rosc", "nic1_bus_clk", "nic1_clk", "spll_bus_clk", };
  32static const char * const arm_sels[]            = { "core", "dummy", "dummy", "hsrun_core", };
  33
  34/* used by sosc/sirc/firc/ddr/spll/apll dividers */
  35static const struct clk_div_table ulp_div_table[] = {
  36        { .val = 1, .div = 1, },
  37        { .val = 2, .div = 2, },
  38        { .val = 3, .div = 4, },
  39        { .val = 4, .div = 8, },
  40        { .val = 5, .div = 16, },
  41        { .val = 6, .div = 32, },
  42        { .val = 7, .div = 64, },
  43        { /* sentinel */ },
  44};
  45
  46static void __init imx7ulp_clk_scg1_init(struct device_node *np)
  47{
  48        struct clk_hw_onecell_data *clk_data;
  49        struct clk_hw **hws;
  50        void __iomem *base;
  51
  52        clk_data = kzalloc(struct_size(clk_data, hws, IMX7ULP_CLK_SCG1_END),
  53                           GFP_KERNEL);
  54        if (!clk_data)
  55                return;
  56
  57        clk_data->num = IMX7ULP_CLK_SCG1_END;
  58        hws = clk_data->hws;
  59
  60        hws[IMX7ULP_CLK_DUMMY]          = imx_clk_hw_fixed("dummy", 0);
  61
  62        hws[IMX7ULP_CLK_ROSC]           = imx_obtain_fixed_clk_hw(np, "rosc");
  63        hws[IMX7ULP_CLK_SOSC]           = imx_obtain_fixed_clk_hw(np, "sosc");
  64        hws[IMX7ULP_CLK_SIRC]           = imx_obtain_fixed_clk_hw(np, "sirc");
  65        hws[IMX7ULP_CLK_FIRC]           = imx_obtain_fixed_clk_hw(np, "firc");
  66        hws[IMX7ULP_CLK_UPLL]           = imx_obtain_fixed_clk_hw(np, "upll");
  67
  68        /* SCG1 */
  69        base = of_iomap(np, 0);
  70        WARN_ON(!base);
  71
  72        /* NOTE: xPLL config can't be changed when xPLL is enabled */
  73        hws[IMX7ULP_CLK_APLL_PRE_SEL]   = imx_clk_hw_mux_flags("apll_pre_sel", base + 0x508, 0, 1, pll_pre_sels, ARRAY_SIZE(pll_pre_sels), CLK_SET_PARENT_GATE);
  74        hws[IMX7ULP_CLK_SPLL_PRE_SEL]   = imx_clk_hw_mux_flags("spll_pre_sel", base + 0x608, 0, 1, pll_pre_sels, ARRAY_SIZE(pll_pre_sels), CLK_SET_PARENT_GATE);
  75
  76        /*                                                         name             parent_name    reg                  shift   width   flags */
  77        hws[IMX7ULP_CLK_APLL_PRE_DIV]   = imx_clk_hw_divider_flags("apll_pre_div", "apll_pre_sel", base + 0x508,        8,      3,      CLK_SET_RATE_GATE);
  78        hws[IMX7ULP_CLK_SPLL_PRE_DIV]   = imx_clk_hw_divider_flags("spll_pre_div", "spll_pre_sel", base + 0x608,        8,      3,      CLK_SET_RATE_GATE);
  79
  80        /*                                              name     parent_name     base */
  81        hws[IMX7ULP_CLK_APLL]           = imx_clk_hw_pllv4("apll",  "apll_pre_div", base + 0x500);
  82        hws[IMX7ULP_CLK_SPLL]           = imx_clk_hw_pllv4("spll",  "spll_pre_div", base + 0x600);
  83
  84        /* APLL PFDs */
  85        hws[IMX7ULP_CLK_APLL_PFD0]      = imx_clk_hw_pfdv2("apll_pfd0", "apll", base + 0x50c, 0);
  86        hws[IMX7ULP_CLK_APLL_PFD1]      = imx_clk_hw_pfdv2("apll_pfd1", "apll", base + 0x50c, 1);
  87        hws[IMX7ULP_CLK_APLL_PFD2]      = imx_clk_hw_pfdv2("apll_pfd2", "apll", base + 0x50c, 2);
  88        hws[IMX7ULP_CLK_APLL_PFD3]      = imx_clk_hw_pfdv2("apll_pfd3", "apll", base + 0x50c, 3);
  89
  90        /* SPLL PFDs */
  91        hws[IMX7ULP_CLK_SPLL_PFD0]      = imx_clk_hw_pfdv2("spll_pfd0", "spll", base + 0x60C, 0);
  92        hws[IMX7ULP_CLK_SPLL_PFD1]      = imx_clk_hw_pfdv2("spll_pfd1", "spll", base + 0x60C, 1);
  93        hws[IMX7ULP_CLK_SPLL_PFD2]      = imx_clk_hw_pfdv2("spll_pfd2", "spll", base + 0x60C, 2);
  94        hws[IMX7ULP_CLK_SPLL_PFD3]      = imx_clk_hw_pfdv2("spll_pfd3", "spll", base + 0x60C, 3);
  95
  96        /* PLL Mux */
  97        hws[IMX7ULP_CLK_APLL_PFD_SEL]   = imx_clk_hw_mux_flags("apll_pfd_sel", base + 0x508, 14, 2, apll_pfd_sels, ARRAY_SIZE(apll_pfd_sels), CLK_SET_RATE_PARENT | CLK_SET_PARENT_GATE);
  98        hws[IMX7ULP_CLK_SPLL_PFD_SEL]   = imx_clk_hw_mux_flags("spll_pfd_sel", base + 0x608, 14, 2, spll_pfd_sels, ARRAY_SIZE(spll_pfd_sels), CLK_SET_RATE_PARENT | CLK_SET_PARENT_GATE);
  99        hws[IMX7ULP_CLK_APLL_SEL]       = imx_clk_hw_mux_flags("apll_sel", base + 0x508, 1, 1, apll_sels, ARRAY_SIZE(apll_sels), CLK_SET_RATE_PARENT | CLK_SET_PARENT_GATE);
 100        hws[IMX7ULP_CLK_SPLL_SEL]       = imx_clk_hw_mux_flags("spll_sel", base + 0x608, 1, 1, spll_sels, ARRAY_SIZE(spll_sels), CLK_SET_RATE_PARENT | CLK_SET_PARENT_GATE);
 101
 102        hws[IMX7ULP_CLK_SPLL_BUS_CLK]   = imx_clk_hw_divider_gate("spll_bus_clk", "spll_sel", CLK_SET_RATE_GATE, base + 0x604, 8, 3, 0, ulp_div_table, &imx_ccm_lock);
 103
 104        /* scs/ddr/nic select different clock source requires that clock to be enabled first */
 105        hws[IMX7ULP_CLK_SYS_SEL]        = imx_clk_hw_mux2("scs_sel", base + 0x14, 24, 4, scs_sels, ARRAY_SIZE(scs_sels));
 106        hws[IMX7ULP_CLK_HSRUN_SYS_SEL] = imx_clk_hw_mux2("hsrun_scs_sel", base + 0x1c, 24, 4, scs_sels, ARRAY_SIZE(scs_sels));
 107        hws[IMX7ULP_CLK_NIC_SEL]        = imx_clk_hw_mux2("nic_sel", base + 0x40, 28, 1, nic_sels, ARRAY_SIZE(nic_sels));
 108        hws[IMX7ULP_CLK_DDR_SEL]        = imx_clk_hw_mux_flags("ddr_sel", base + 0x30, 24, 2, ddr_sels, ARRAY_SIZE(ddr_sels), CLK_SET_RATE_PARENT | CLK_OPS_PARENT_ENABLE);
 109
 110        hws[IMX7ULP_CLK_CORE_DIV]       = imx_clk_hw_divider_flags("divcore",   "scs_sel",  base + 0x14, 16, 4, CLK_SET_RATE_PARENT);
 111        hws[IMX7ULP_CLK_CORE]           = imx_clk_hw_cpu("core", "divcore", hws[IMX7ULP_CLK_CORE_DIV]->clk, hws[IMX7ULP_CLK_SYS_SEL]->clk, hws[IMX7ULP_CLK_SPLL_SEL]->clk, hws[IMX7ULP_CLK_FIRC]->clk);
 112        hws[IMX7ULP_CLK_HSRUN_CORE_DIV] = imx_clk_hw_divider_flags("hsrun_divcore", "hsrun_scs_sel", base + 0x1c, 16, 4, CLK_SET_RATE_PARENT);
 113        hws[IMX7ULP_CLK_HSRUN_CORE] = imx_clk_hw_cpu("hsrun_core", "hsrun_divcore", hws[IMX7ULP_CLK_HSRUN_CORE_DIV]->clk, hws[IMX7ULP_CLK_HSRUN_SYS_SEL]->clk, hws[IMX7ULP_CLK_SPLL_SEL]->clk, hws[IMX7ULP_CLK_FIRC]->clk);
 114
 115        hws[IMX7ULP_CLK_DDR_DIV]        = imx_clk_hw_divider_gate("ddr_clk", "ddr_sel", CLK_SET_RATE_PARENT | CLK_IS_CRITICAL, base + 0x30, 0, 3,
 116                                                               0, ulp_div_table, &imx_ccm_lock);
 117
 118        hws[IMX7ULP_CLK_NIC0_DIV]       = imx_clk_hw_divider_flags("nic0_clk",          "nic_sel",  base + 0x40, 24, 4, CLK_SET_RATE_PARENT | CLK_IS_CRITICAL);
 119        hws[IMX7ULP_CLK_NIC1_DIV]       = imx_clk_hw_divider_flags("nic1_clk",          "nic0_clk", base + 0x40, 16, 4, CLK_SET_RATE_PARENT | CLK_IS_CRITICAL);
 120        hws[IMX7ULP_CLK_NIC1_BUS_DIV]   = imx_clk_hw_divider_flags("nic1_bus_clk",      "nic0_clk", base + 0x40, 4,  4, CLK_SET_RATE_PARENT | CLK_IS_CRITICAL);
 121
 122        hws[IMX7ULP_CLK_GPU_DIV]        = imx_clk_hw_divider("gpu_clk", "nic0_clk", base + 0x40, 20, 4);
 123
 124        hws[IMX7ULP_CLK_SOSC_BUS_CLK]   = imx_clk_hw_divider_gate("sosc_bus_clk", "sosc", 0, base + 0x104, 8, 3,
 125                                                               CLK_DIVIDER_READ_ONLY, ulp_div_table, &imx_ccm_lock);
 126        hws[IMX7ULP_CLK_FIRC_BUS_CLK]   = imx_clk_hw_divider_gate("firc_bus_clk", "firc", 0, base + 0x304, 8, 3,
 127                                                               CLK_DIVIDER_READ_ONLY, ulp_div_table, &imx_ccm_lock);
 128
 129        imx_check_clk_hws(hws, clk_data->num);
 130
 131        of_clk_add_hw_provider(np, of_clk_hw_onecell_get, clk_data);
 132}
 133CLK_OF_DECLARE(imx7ulp_clk_scg1, "fsl,imx7ulp-scg1", imx7ulp_clk_scg1_init);
 134
 135static void __init imx7ulp_clk_pcc2_init(struct device_node *np)
 136{
 137        struct clk_hw_onecell_data *clk_data;
 138        struct clk_hw **hws;
 139        void __iomem *base;
 140
 141        clk_data = kzalloc(struct_size(clk_data, hws, IMX7ULP_CLK_PCC2_END),
 142                           GFP_KERNEL);
 143        if (!clk_data)
 144                return;
 145
 146        clk_data->num = IMX7ULP_CLK_PCC2_END;
 147        hws = clk_data->hws;
 148
 149        /* PCC2 */
 150        base = of_iomap(np, 0);
 151        WARN_ON(!base);
 152
 153        hws[IMX7ULP_CLK_DMA1]           = imx_clk_hw_gate("dma1", "nic1_clk", base + 0x20, 30);
 154        hws[IMX7ULP_CLK_RGPIO2P1]       = imx_clk_hw_gate("rgpio2p1", "nic1_bus_clk", base + 0x3c, 30);
 155        hws[IMX7ULP_CLK_DMA_MUX1]       = imx_clk_hw_gate("dma_mux1", "nic1_bus_clk", base + 0x84, 30);
 156        hws[IMX7ULP_CLK_CAAM]           = imx_clk_hw_gate("caam", "nic1_clk", base + 0x90, 30);
 157        hws[IMX7ULP_CLK_LPTPM4]         = imx7ulp_clk_hw_composite("lptpm4",  periph_bus_sels, ARRAY_SIZE(periph_bus_sels), true, false, true, base + 0x94);
 158        hws[IMX7ULP_CLK_LPTPM5]         = imx7ulp_clk_hw_composite("lptpm5",  periph_bus_sels, ARRAY_SIZE(periph_bus_sels), true, false, true, base + 0x98);
 159        hws[IMX7ULP_CLK_LPIT1]          = imx7ulp_clk_hw_composite("lpit1",   periph_bus_sels, ARRAY_SIZE(periph_bus_sels), true, false, true, base + 0x9c);
 160        hws[IMX7ULP_CLK_LPSPI2]         = imx7ulp_clk_hw_composite("lpspi2",  periph_bus_sels, ARRAY_SIZE(periph_bus_sels), true, false, true, base + 0xa4);
 161        hws[IMX7ULP_CLK_LPSPI3]         = imx7ulp_clk_hw_composite("lpspi3",  periph_bus_sels, ARRAY_SIZE(periph_bus_sels), true, false, true, base + 0xa8);
 162        hws[IMX7ULP_CLK_LPI2C4]         = imx7ulp_clk_hw_composite("lpi2c4",  periph_bus_sels, ARRAY_SIZE(periph_bus_sels), true, false, true, base + 0xac);
 163        hws[IMX7ULP_CLK_LPI2C5]         = imx7ulp_clk_hw_composite("lpi2c5",  periph_bus_sels, ARRAY_SIZE(periph_bus_sels), true, false, true, base + 0xb0);
 164        hws[IMX7ULP_CLK_LPUART4]        = imx7ulp_clk_hw_composite("lpuart4", periph_bus_sels, ARRAY_SIZE(periph_bus_sels), true, false, true, base + 0xb4);
 165        hws[IMX7ULP_CLK_LPUART5]        = imx7ulp_clk_hw_composite("lpuart5", periph_bus_sels, ARRAY_SIZE(periph_bus_sels), true, false, true, base + 0xb8);
 166        hws[IMX7ULP_CLK_FLEXIO1]        = imx7ulp_clk_hw_composite("flexio1", periph_bus_sels, ARRAY_SIZE(periph_bus_sels), true, false, true, base + 0xc4);
 167        hws[IMX7ULP_CLK_USB0]           = imx7ulp_clk_hw_composite("usb0",    periph_plat_sels, ARRAY_SIZE(periph_plat_sels), true, true,  true, base + 0xcc);
 168        hws[IMX7ULP_CLK_USB1]           = imx7ulp_clk_hw_composite("usb1",    periph_plat_sels, ARRAY_SIZE(periph_plat_sels), true, true,  true, base + 0xd0);
 169        hws[IMX7ULP_CLK_USB_PHY]        = imx_clk_hw_gate("usb_phy", "nic1_bus_clk", base + 0xd4, 30);
 170        hws[IMX7ULP_CLK_USDHC0]         = imx7ulp_clk_hw_composite("usdhc0",  periph_plat_sels, ARRAY_SIZE(periph_plat_sels), true, true,  true, base + 0xdc);
 171        hws[IMX7ULP_CLK_USDHC1]         = imx7ulp_clk_hw_composite("usdhc1",  periph_plat_sels, ARRAY_SIZE(periph_plat_sels), true, true,  true, base + 0xe0);
 172        hws[IMX7ULP_CLK_WDG1]           = imx7ulp_clk_hw_composite("wdg1",    periph_bus_sels, ARRAY_SIZE(periph_bus_sels), true, true,  true, base + 0xf4);
 173        hws[IMX7ULP_CLK_WDG2]           = imx7ulp_clk_hw_composite("wdg2",    periph_bus_sels, ARRAY_SIZE(periph_bus_sels), true, true,  true, base + 0x10c);
 174
 175        imx_check_clk_hws(hws, clk_data->num);
 176
 177        of_clk_add_hw_provider(np, of_clk_hw_onecell_get, clk_data);
 178
 179        imx_register_uart_clocks(2);
 180}
 181CLK_OF_DECLARE(imx7ulp_clk_pcc2, "fsl,imx7ulp-pcc2", imx7ulp_clk_pcc2_init);
 182
 183static void __init imx7ulp_clk_pcc3_init(struct device_node *np)
 184{
 185        struct clk_hw_onecell_data *clk_data;
 186        struct clk_hw **hws;
 187        void __iomem *base;
 188
 189        clk_data = kzalloc(struct_size(clk_data, hws, IMX7ULP_CLK_PCC3_END),
 190                           GFP_KERNEL);
 191        if (!clk_data)
 192                return;
 193
 194        clk_data->num = IMX7ULP_CLK_PCC3_END;
 195        hws = clk_data->hws;
 196
 197        /* PCC3 */
 198        base = of_iomap(np, 0);
 199        WARN_ON(!base);
 200
 201        hws[IMX7ULP_CLK_LPTPM6] = imx7ulp_clk_hw_composite("lptpm6",  periph_bus_sels, ARRAY_SIZE(periph_bus_sels), true, false, true, base + 0x84);
 202        hws[IMX7ULP_CLK_LPTPM7] = imx7ulp_clk_hw_composite("lptpm7",  periph_bus_sels, ARRAY_SIZE(periph_bus_sels), true, false, true, base + 0x88);
 203
 204        hws[IMX7ULP_CLK_MMDC]           = clk_hw_register_gate(NULL, "mmdc", "nic1_clk", CLK_SET_RATE_PARENT | CLK_IS_CRITICAL,
 205                                                               base + 0xac, 30, 0, &imx_ccm_lock);
 206        hws[IMX7ULP_CLK_LPI2C6] = imx7ulp_clk_hw_composite("lpi2c6",  periph_bus_sels, ARRAY_SIZE(periph_bus_sels), true, false, true, base + 0x90);
 207        hws[IMX7ULP_CLK_LPI2C7] = imx7ulp_clk_hw_composite("lpi2c7",  periph_bus_sels, ARRAY_SIZE(periph_bus_sels), true, false, true, base + 0x94);
 208        hws[IMX7ULP_CLK_LPUART6]        = imx7ulp_clk_hw_composite("lpuart6", periph_bus_sels, ARRAY_SIZE(periph_bus_sels), true, false, true, base + 0x98);
 209        hws[IMX7ULP_CLK_LPUART7]        = imx7ulp_clk_hw_composite("lpuart7", periph_bus_sels, ARRAY_SIZE(periph_bus_sels), true, false, true, base + 0x9c);
 210        hws[IMX7ULP_CLK_DSI]            = imx7ulp_clk_hw_composite("dsi",     periph_bus_sels, ARRAY_SIZE(periph_bus_sels), true, true,  true, base + 0xa4);
 211        hws[IMX7ULP_CLK_LCDIF]          = imx7ulp_clk_hw_composite("lcdif",   periph_plat_sels, ARRAY_SIZE(periph_plat_sels), true, true,  true, base + 0xa8);
 212
 213        hws[IMX7ULP_CLK_VIU]            = imx_clk_hw_gate("viu",   "nic1_clk",     base + 0xa0, 30);
 214        hws[IMX7ULP_CLK_PCTLC]          = imx_clk_hw_gate("pctlc", "nic1_bus_clk", base + 0xb8, 30);
 215        hws[IMX7ULP_CLK_PCTLD]          = imx_clk_hw_gate("pctld", "nic1_bus_clk", base + 0xbc, 30);
 216        hws[IMX7ULP_CLK_PCTLE]          = imx_clk_hw_gate("pctle", "nic1_bus_clk", base + 0xc0, 30);
 217        hws[IMX7ULP_CLK_PCTLF]          = imx_clk_hw_gate("pctlf", "nic1_bus_clk", base + 0xc4, 30);
 218
 219        hws[IMX7ULP_CLK_GPU3D]          = imx7ulp_clk_hw_composite("gpu3d",   periph_plat_sels, ARRAY_SIZE(periph_plat_sels), true, false, true, base + 0x140);
 220        hws[IMX7ULP_CLK_GPU2D]          = imx7ulp_clk_hw_composite("gpu2d",   periph_plat_sels, ARRAY_SIZE(periph_plat_sels), true, false, true, base + 0x144);
 221
 222        imx_check_clk_hws(hws, clk_data->num);
 223
 224        of_clk_add_hw_provider(np, of_clk_hw_onecell_get, clk_data);
 225
 226        imx_register_uart_clocks(7);
 227}
 228CLK_OF_DECLARE(imx7ulp_clk_pcc3, "fsl,imx7ulp-pcc3", imx7ulp_clk_pcc3_init);
 229
 230static void __init imx7ulp_clk_smc1_init(struct device_node *np)
 231{
 232        struct clk_hw_onecell_data *clk_data;
 233        struct clk_hw **hws;
 234        void __iomem *base;
 235
 236        clk_data = kzalloc(struct_size(clk_data, hws, IMX7ULP_CLK_SMC1_END),
 237                           GFP_KERNEL);
 238        if (!clk_data)
 239                return;
 240
 241        clk_data->num = IMX7ULP_CLK_SMC1_END;
 242        hws = clk_data->hws;
 243
 244        /* SMC1 */
 245        base = of_iomap(np, 0);
 246        WARN_ON(!base);
 247
 248        hws[IMX7ULP_CLK_ARM] = imx_clk_hw_mux_flags("arm", base + 0x10, 8, 2, arm_sels, ARRAY_SIZE(arm_sels), CLK_SET_RATE_PARENT);
 249
 250        imx_check_clk_hws(hws, clk_data->num);
 251
 252        of_clk_add_hw_provider(np, of_clk_hw_onecell_get, clk_data);
 253}
 254CLK_OF_DECLARE(imx7ulp_clk_smc1, "fsl,imx7ulp-smc1", imx7ulp_clk_smc1_init);
 255