root/drivers/clk/renesas/r8a77995-cpg-mssr.c
// SPDX-License-Identifier: GPL-2.0
/*
 * r8a77995 Clock Pulse Generator / Module Standby and Software Reset
 *
 * Copyright (C) 2017 Glider bvba
 *
 * Based on r8a7795-cpg-mssr.c
 *
 * Copyright (C) 2015 Glider bvba
 * Copyright (C) 2015 Renesas Electronics Corp.
 */

#include <linux/device.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/soc/renesas/rcar-rst.h>

#include <dt-bindings/clock/r8a77995-cpg-mssr.h>

#include "renesas-cpg-mssr.h"
#include "rcar-gen3-cpg.h"

enum clk_ids {
        /* Core Clock Outputs exported to DT */
        LAST_DT_CORE_CLK = R8A77995_CLK_CPEX,

        /* External Input Clocks */
        CLK_EXTAL,

        /* Internal Core Clocks */
        CLK_MAIN,
        CLK_PLL0,
        CLK_PLL1,
        CLK_PLL3,
        CLK_PLL0D2,
        CLK_PLL0D3,
        CLK_PLL0D5,
        CLK_PLL1D2,
        CLK_PE,
        CLK_S0,
        CLK_S1,
        CLK_S2,
        CLK_S3,
        CLK_SDSRC,
        CLK_RPCSRC,
        CLK_RINT,
        CLK_OCO,

        /* Module Clocks */
        MOD_CLK_BASE
};

static const struct cpg_core_clk r8a77995_core_clks[] __initconst = {
        /* External Clock Inputs */
        DEF_INPUT("extal",     CLK_EXTAL),

        /* Internal Core Clocks */
        DEF_BASE(".main",      CLK_MAIN, CLK_TYPE_GEN3_MAIN,       CLK_EXTAL),
        DEF_BASE(".pll1",      CLK_PLL1, CLK_TYPE_GEN3_PLL1,       CLK_MAIN),
        DEF_BASE(".pll3",      CLK_PLL3, CLK_TYPE_GEN3_PLL3,       CLK_MAIN),

        DEF_FIXED(".pll0",     CLK_PLL0,           CLK_MAIN,       4, 250),
        DEF_FIXED(".pll0d2",   CLK_PLL0D2,         CLK_PLL0,       2, 1),
        DEF_FIXED(".pll0d3",   CLK_PLL0D3,         CLK_PLL0,       3, 1),
        DEF_FIXED(".pll0d5",   CLK_PLL0D5,         CLK_PLL0,       5, 1),
        DEF_FIXED(".pll1d2",   CLK_PLL1D2,         CLK_PLL1,       2, 1),
        DEF_FIXED(".pe",       CLK_PE,             CLK_PLL0D3,     4, 1),
        DEF_FIXED(".s0",       CLK_S0,             CLK_PLL1,       2, 1),
        DEF_FIXED(".s1",       CLK_S1,             CLK_PLL1,       3, 1),
        DEF_FIXED(".s2",       CLK_S2,             CLK_PLL1,       4, 1),
        DEF_FIXED(".s3",       CLK_S3,             CLK_PLL1,       6, 1),
        DEF_FIXED(".sdsrc",    CLK_SDSRC,          CLK_PLL1,       2, 1),

        DEF_FIXED_RPCSRC_D3(".rpcsrc", CLK_RPCSRC, CLK_PLL0, CLK_PLL1),

        DEF_DIV6_RO(".r",      CLK_RINT,           CLK_EXTAL, CPG_RCKCR, 32),

        DEF_RATE(".oco",       CLK_OCO,            8 * 1000 * 1000),

        /* Core Clock Outputs */
        DEF_FIXED("za2",       R8A77995_CLK_ZA2,   CLK_PLL0D3,     2, 1),
        DEF_FIXED("z2",        R8A77995_CLK_Z2,    CLK_PLL0D3,     1, 1),
        DEF_FIXED("ztr",       R8A77995_CLK_ZTR,   CLK_PLL1,       6, 1),
        DEF_FIXED("zt",        R8A77995_CLK_ZT,    CLK_PLL1,       4, 1),
        DEF_FIXED("zx",        R8A77995_CLK_ZX,    CLK_PLL1,       3, 1),
        DEF_FIXED("s0d1",      R8A77995_CLK_S0D1,  CLK_S0,         1, 1),
        DEF_FIXED("s1d1",      R8A77995_CLK_S1D1,  CLK_S1,         1, 1),
        DEF_FIXED("s1d2",      R8A77995_CLK_S1D2,  CLK_S1,         2, 1),
        DEF_FIXED("s1d4",      R8A77995_CLK_S1D4,  CLK_S1,         4, 1),
        DEF_FIXED("s2d1",      R8A77995_CLK_S2D1,  CLK_S2,         1, 1),
        DEF_FIXED("s2d2",      R8A77995_CLK_S2D2,  CLK_S2,         2, 1),
        DEF_FIXED("s2d4",      R8A77995_CLK_S2D4,  CLK_S2,         4, 1),
        DEF_FIXED("s3d1",      R8A77995_CLK_S3D1,  CLK_S3,         1, 1),
        DEF_FIXED("s3d2",      R8A77995_CLK_S3D2,  CLK_S3,         2, 1),
        DEF_FIXED("s3d4",      R8A77995_CLK_S3D4,  CLK_S3,         4, 1),

        DEF_FIXED("cl",        R8A77995_CLK_CL,    CLK_PLL1,      48, 1),
        DEF_FIXED("cr",        R8A77995_CLK_CR,    CLK_PLL1D2,     2, 1),
        DEF_FIXED("cp",        R8A77995_CLK_CP,    CLK_EXTAL,      2, 1),
        DEF_FIXED("cpex",      R8A77995_CLK_CPEX,  CLK_EXTAL,      4, 1),

        DEF_DIV6_RO("osc",     R8A77995_CLK_OSC,   CLK_EXTAL, CPG_RCKCR,  8),

        DEF_GEN3_PE("s1d4c",   R8A77995_CLK_S1D4C, CLK_S1, 4, CLK_PE, 2),
        DEF_GEN3_PE("s3d1c",   R8A77995_CLK_S3D1C, CLK_S3, 1, CLK_PE, 1),
        DEF_GEN3_PE("s3d2c",   R8A77995_CLK_S3D2C, CLK_S3, 2, CLK_PE, 2),
        DEF_GEN3_PE("s3d4c",   R8A77995_CLK_S3D4C, CLK_S3, 4, CLK_PE, 4),

        DEF_GEN3_SDH("sd0h",   R8A77995_CLK_SD0H,  CLK_SDSRC,         0x268),
        DEF_GEN3_SD("sd0",     R8A77995_CLK_SD0,   R8A77995_CLK_SD0H, 0x268),

        DEF_BASE("rpc",        R8A77995_CLK_RPC,   CLK_TYPE_GEN3_RPC,   CLK_RPCSRC),
        DEF_BASE("rpcd2",      R8A77995_CLK_RPCD2, CLK_TYPE_GEN3_RPCD2, R8A77995_CLK_RPC),

        DEF_DIV6P1("canfd",    R8A77995_CLK_CANFD, CLK_PLL0D3,    0x244),
        DEF_DIV6P1("mso",      R8A77995_CLK_MSO,   CLK_PLL1D2,    0x014),

        DEF_GEN3_RCKSEL("r",   R8A77995_CLK_R, CLK_RINT, 1, CLK_OCO, 61 * 4),
};

static const struct mssr_mod_clk r8a77995_mod_clks[] __initconst = {
        DEF_MOD("tmu4",                  121,   R8A77995_CLK_S1D4C),
        DEF_MOD("tmu3",                  122,   R8A77995_CLK_S3D2C),
        DEF_MOD("tmu2",                  123,   R8A77995_CLK_S3D2C),
        DEF_MOD("tmu1",                  124,   R8A77995_CLK_S3D2C),
        DEF_MOD("tmu0",                  125,   R8A77995_CLK_CP),
        DEF_MOD("scif5",                 202,   R8A77995_CLK_S3D4C),
        DEF_MOD("scif4",                 203,   R8A77995_CLK_S3D4C),
        DEF_MOD("scif3",                 204,   R8A77995_CLK_S3D4C),
        DEF_MOD("scif1",                 206,   R8A77995_CLK_S3D4C),
        DEF_MOD("scif0",                 207,   R8A77995_CLK_S3D4C),
        DEF_MOD("msiof3",                208,   R8A77995_CLK_MSO),
        DEF_MOD("msiof2",                209,   R8A77995_CLK_MSO),
        DEF_MOD("msiof1",                210,   R8A77995_CLK_MSO),
        DEF_MOD("msiof0",                211,   R8A77995_CLK_MSO),
        DEF_MOD("sys-dmac2",             217,   R8A77995_CLK_S3D1),
        DEF_MOD("sys-dmac1",             218,   R8A77995_CLK_S3D1),
        DEF_MOD("sys-dmac0",             219,   R8A77995_CLK_S3D1),
        DEF_MOD("sceg-pub",              229,   R8A77995_CLK_CR),
        DEF_MOD("cmt3",                  300,   R8A77995_CLK_R),
        DEF_MOD("cmt2",                  301,   R8A77995_CLK_R),
        DEF_MOD("cmt1",                  302,   R8A77995_CLK_R),
        DEF_MOD("cmt0",                  303,   R8A77995_CLK_R),
        DEF_MOD("scif2",                 310,   R8A77995_CLK_S3D4C),
        DEF_MOD("emmc0",                 312,   R8A77995_CLK_SD0),
        DEF_MOD("usb-dmac0",             330,   R8A77995_CLK_S3D1),
        DEF_MOD("usb-dmac1",             331,   R8A77995_CLK_S3D1),
        DEF_MOD("rwdt",                  402,   R8A77995_CLK_R),
        DEF_MOD("intc-ex",               407,   R8A77995_CLK_CP),
        DEF_MOD("intc-ap",               408,   R8A77995_CLK_S1D2),
        DEF_MOD("audmac0",               502,   R8A77995_CLK_S1D2),
        DEF_MOD("hscif3",                517,   R8A77995_CLK_S3D1C),
        DEF_MOD("hscif0",                520,   R8A77995_CLK_S3D1C),
        DEF_MOD("thermal",               522,   R8A77995_CLK_CP),
        DEF_MOD("pwm",                   523,   R8A77995_CLK_S3D4C),
        DEF_MOD("fcpvd1",                602,   R8A77995_CLK_S1D2),
        DEF_MOD("fcpvd0",                603,   R8A77995_CLK_S1D2),
        DEF_MOD("fcpvbs",                607,   R8A77995_CLK_S0D1),
        DEF_MOD("vspd1",                 622,   R8A77995_CLK_S1D2),
        DEF_MOD("vspd0",                 623,   R8A77995_CLK_S1D2),
        DEF_MOD("vspbs",                 627,   R8A77995_CLK_S0D1),
        DEF_MOD("ehci0",                 703,   R8A77995_CLK_S3D2),
        DEF_MOD("hsusb",                 704,   R8A77995_CLK_S3D2),
        DEF_MOD("cmm1",                  710,   R8A77995_CLK_S1D1),
        DEF_MOD("cmm0",                  711,   R8A77995_CLK_S1D1),
        DEF_MOD("du1",                   723,   R8A77995_CLK_S1D1),
        DEF_MOD("du0",                   724,   R8A77995_CLK_S1D1),
        DEF_MOD("lvds",                  727,   R8A77995_CLK_S2D1),
        DEF_MOD("mlp",                   802,   R8A77995_CLK_S2D1),
        DEF_MOD("vin4",                  807,   R8A77995_CLK_S3D1),
        DEF_MOD("etheravb",              812,   R8A77995_CLK_S3D2),
        DEF_MOD("imr0",                  823,   R8A77995_CLK_S1D2),
        DEF_MOD("gpio6",                 906,   R8A77995_CLK_S3D4),
        DEF_MOD("gpio5",                 907,   R8A77995_CLK_S3D4),
        DEF_MOD("gpio4",                 908,   R8A77995_CLK_S3D4),
        DEF_MOD("gpio3",                 909,   R8A77995_CLK_S3D4),
        DEF_MOD("gpio2",                 910,   R8A77995_CLK_S3D4),
        DEF_MOD("gpio1",                 911,   R8A77995_CLK_S3D4),
        DEF_MOD("gpio0",                 912,   R8A77995_CLK_S3D4),
        DEF_MOD("can-fd",                914,   R8A77995_CLK_S3D2),
        DEF_MOD("can-if1",               915,   R8A77995_CLK_S3D4),
        DEF_MOD("can-if0",               916,   R8A77995_CLK_S3D4),
        DEF_MOD("rpc-if",                917,   R8A77995_CLK_RPCD2),
        DEF_MOD("adg",                   922,   R8A77995_CLK_ZA2),
        DEF_MOD("i2c3",                  928,   R8A77995_CLK_S3D2),
        DEF_MOD("i2c2",                  929,   R8A77995_CLK_S3D2),
        DEF_MOD("i2c1",                  930,   R8A77995_CLK_S3D2),
        DEF_MOD("i2c0",                  931,   R8A77995_CLK_S3D2),
        DEF_MOD("ssi-all",              1005,   R8A77995_CLK_S3D4),
        DEF_MOD("ssi4",                 1011,   MOD_CLK_ID(1005)),
        DEF_MOD("ssi3",                 1012,   MOD_CLK_ID(1005)),
        DEF_MOD("scu-all",              1017,   R8A77995_CLK_S3D4),
        DEF_MOD("scu-dvc1",             1018,   MOD_CLK_ID(1017)),
        DEF_MOD("scu-dvc0",             1019,   MOD_CLK_ID(1017)),
        DEF_MOD("scu-ctu1-mix1",        1020,   MOD_CLK_ID(1017)),
        DEF_MOD("scu-ctu0-mix0",        1021,   MOD_CLK_ID(1017)),
        DEF_MOD("scu-src6",             1025,   MOD_CLK_ID(1017)),
        DEF_MOD("scu-src5",             1026,   MOD_CLK_ID(1017)),
};

static const unsigned int r8a77995_crit_mod_clks[] __initconst = {
        MOD_CLK_ID(402),        /* RWDT */
        MOD_CLK_ID(408),        /* INTC-AP (GIC) */
};

/*
 * CPG Clock Data
 */

/*
 * MD19         EXTAL (MHz)     PLL0            PLL1            PLL3
 *--------------------------------------------------------------------
 * 0            48 x 1          x250/4          x100/3          x100/3
 * 1            48 x 1          x250/4          x100/3          x58/3
 */
#define CPG_PLL_CONFIG_INDEX(md)        (((md) & BIT(19)) >> 19)

static const struct rcar_gen3_cpg_pll_config cpg_pll_configs[2] __initconst = {
        /* EXTAL div    PLL1 mult/div   PLL3 mult/div */
        { 1,            100,    3,      100,    3,      },
        { 1,            100,    3,      58,     3,      },
};

static int __init r8a77995_cpg_mssr_init(struct device *dev)
{
        const struct rcar_gen3_cpg_pll_config *cpg_pll_config;
        u32 cpg_mode;
        int error;

        error = rcar_rst_read_mode_pins(&cpg_mode);
        if (error)
                return error;

        cpg_pll_config = &cpg_pll_configs[CPG_PLL_CONFIG_INDEX(cpg_mode)];

        return rcar_gen3_cpg_init(cpg_pll_config, 0, cpg_mode);
}

const struct cpg_mssr_info r8a77995_cpg_mssr_info __initconst = {
        /* Core Clocks */
        .core_clks = r8a77995_core_clks,
        .num_core_clks = ARRAY_SIZE(r8a77995_core_clks),
        .last_dt_core_clk = LAST_DT_CORE_CLK,
        .num_total_core_clks = MOD_CLK_BASE,

        /* Module Clocks */
        .mod_clks = r8a77995_mod_clks,
        .num_mod_clks = ARRAY_SIZE(r8a77995_mod_clks),
        .num_hw_mod_clks = 12 * 32,

        /* Critical Module Clocks */
        .crit_mod_clks = r8a77995_crit_mod_clks,
        .num_crit_mod_clks = ARRAY_SIZE(r8a77995_crit_mod_clks),

        /* Callbacks */
        .init = r8a77995_cpg_mssr_init,
        .cpg_clk_register = rcar_gen3_cpg_clk_register,
};