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linux/drivers/clk/renesas/r8a77970-cpg-mssr.c
Ulrich Hecht f23f1101ad clk: renesas: rcar-gen3: Mark RWDT clocks as critical 
Ensures RWDT remains alert throughout the boot process if enabled.

This patch applies the change to the following SoCs: r8a77950, r8a77951,
r8a77960, r8a77961, r8a77965, r8a77970, r8a77980, r8a77990 and r8a77995.

Signed-off-by: Ulrich Hecht <uli+renesas@fpond.eu>
Link: https://lore.kernel.org/r/20200616162626.27944-3-uli+renesas@fpond.eu
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
2020-06-22 16:53:49 +02:00

275 lines
8.5 KiB
C
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// SPDX-License-Identifier: GPL-2.0
/*
* r8a77970 Clock Pulse Generator / Module Standby and Software Reset
*
* Copyright (C) 2017-2018 Cogent Embedded Inc.
*
* Based on r8a7795-cpg-mssr.c
*
* Copyright (C) 2015 Glider bvba
*/
#include <linux/clk-provider.h>
#include <linux/device.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/soc/renesas/rcar-rst.h>
#include <dt-bindings/clock/r8a77970-cpg-mssr.h>
#include "renesas-cpg-mssr.h"
#include "rcar-gen3-cpg.h"
#define CPG_SD0CKCR 0x0074
enum r8a77970_clk_types {
CLK_TYPE_R8A77970_SD0H = CLK_TYPE_GEN3_SOC_BASE,
CLK_TYPE_R8A77970_SD0,
};
enum clk_ids {
/* Core Clock Outputs exported to DT */
LAST_DT_CORE_CLK = R8A77970_CLK_OSC,
/* External Input Clocks */
CLK_EXTAL,
CLK_EXTALR,
/* Internal Core Clocks */
CLK_MAIN,
CLK_PLL0,
CLK_PLL1,
CLK_PLL3,
CLK_PLL1_DIV2,
CLK_PLL1_DIV4,
/* Module Clocks */
MOD_CLK_BASE
};
static spinlock_t cpg_lock;
static const struct clk_div_table cpg_sd0h_div_table[] = {
{ 0, 2 }, { 1, 3 }, { 2, 4 }, { 3, 6 },
{ 4, 8 }, { 5, 12 }, { 6, 16 }, { 7, 18 },
{ 8, 24 }, { 10, 36 }, { 11, 48 }, { 0, 0 },
};
static const struct clk_div_table cpg_sd0_div_table[] = {
{ 4, 8 }, { 5, 12 }, { 6, 16 }, { 7, 18 },
{ 8, 24 }, { 10, 36 }, { 11, 48 }, { 12, 10 },
{ 0, 0 },
};
static const struct cpg_core_clk r8a77970_core_clks[] __initconst = {
/* External Clock Inputs */
DEF_INPUT("extal", CLK_EXTAL),
DEF_INPUT("extalr", CLK_EXTALR),
/* Internal Core Clocks */
DEF_BASE(".main", CLK_MAIN, CLK_TYPE_GEN3_MAIN, CLK_EXTAL),
DEF_BASE(".pll0", CLK_PLL0, CLK_TYPE_GEN3_PLL0, CLK_MAIN),
DEF_BASE(".pll1", CLK_PLL1, CLK_TYPE_GEN3_PLL1, CLK_MAIN),
DEF_BASE(".pll3", CLK_PLL3, CLK_TYPE_GEN3_PLL3, CLK_MAIN),
DEF_FIXED(".pll1_div2", CLK_PLL1_DIV2, CLK_PLL1, 2, 1),
DEF_FIXED(".pll1_div4", CLK_PLL1_DIV4, CLK_PLL1_DIV2, 2, 1),
/* Core Clock Outputs */
DEF_FIXED("ztr", R8A77970_CLK_ZTR, CLK_PLL1_DIV2, 6, 1),
DEF_FIXED("ztrd2", R8A77970_CLK_ZTRD2, CLK_PLL1_DIV2, 12, 1),
DEF_FIXED("zt", R8A77970_CLK_ZT, CLK_PLL1_DIV2, 4, 1),
DEF_FIXED("zx", R8A77970_CLK_ZX, CLK_PLL1_DIV2, 3, 1),
DEF_FIXED("s1d1", R8A77970_CLK_S1D1, CLK_PLL1_DIV2, 4, 1),
DEF_FIXED("s1d2", R8A77970_CLK_S1D2, CLK_PLL1_DIV2, 8, 1),
DEF_FIXED("s1d4", R8A77970_CLK_S1D4, CLK_PLL1_DIV2, 16, 1),
DEF_FIXED("s2d1", R8A77970_CLK_S2D1, CLK_PLL1_DIV2, 6, 1),
DEF_FIXED("s2d2", R8A77970_CLK_S2D2, CLK_PLL1_DIV2, 12, 1),
DEF_FIXED("s2d4", R8A77970_CLK_S2D4, CLK_PLL1_DIV2, 24, 1),
DEF_BASE("sd0h", R8A77970_CLK_SD0H, CLK_TYPE_R8A77970_SD0H,
CLK_PLL1_DIV2),
DEF_BASE("sd0", R8A77970_CLK_SD0, CLK_TYPE_R8A77970_SD0, CLK_PLL1_DIV2),
DEF_FIXED("rpc", R8A77970_CLK_RPC, CLK_PLL1_DIV2, 5, 1),
DEF_FIXED("rpcd2", R8A77970_CLK_RPCD2, CLK_PLL1_DIV2, 10, 1),
DEF_FIXED("cl", R8A77970_CLK_CL, CLK_PLL1_DIV2, 48, 1),
DEF_FIXED("cp", R8A77970_CLK_CP, CLK_EXTAL, 2, 1),
DEF_FIXED("cpex", R8A77970_CLK_CPEX, CLK_EXTAL, 2, 1),
DEF_DIV6P1("canfd", R8A77970_CLK_CANFD, CLK_PLL1_DIV4, 0x244),
DEF_DIV6P1("mso", R8A77970_CLK_MSO, CLK_PLL1_DIV4, 0x014),
DEF_DIV6P1("csi0", R8A77970_CLK_CSI0, CLK_PLL1_DIV4, 0x00c),
DEF_FIXED("osc", R8A77970_CLK_OSC, CLK_PLL1_DIV2, 12*1024, 1),
DEF_FIXED("r", R8A77970_CLK_R, CLK_EXTALR, 1, 1),
};
static const struct mssr_mod_clk r8a77970_mod_clks[] __initconst = {
DEF_MOD("tmu4", 121, R8A77970_CLK_S2D2),
DEF_MOD("tmu3", 122, R8A77970_CLK_S2D2),
DEF_MOD("tmu2", 123, R8A77970_CLK_S2D2),
DEF_MOD("tmu1", 124, R8A77970_CLK_S2D2),
DEF_MOD("tmu0", 125, R8A77970_CLK_CP),
DEF_MOD("ivcp1e", 127, R8A77970_CLK_S2D1),
DEF_MOD("scif4", 203, R8A77970_CLK_S2D4),
DEF_MOD("scif3", 204, R8A77970_CLK_S2D4),
DEF_MOD("scif1", 206, R8A77970_CLK_S2D4),
DEF_MOD("scif0", 207, R8A77970_CLK_S2D4),
DEF_MOD("msiof3", 208, R8A77970_CLK_MSO),
DEF_MOD("msiof2", 209, R8A77970_CLK_MSO),
DEF_MOD("msiof1", 210, R8A77970_CLK_MSO),
DEF_MOD("msiof0", 211, R8A77970_CLK_MSO),
DEF_MOD("mfis", 213, R8A77970_CLK_S2D2),
DEF_MOD("sys-dmac2", 217, R8A77970_CLK_S2D1),
DEF_MOD("sys-dmac1", 218, R8A77970_CLK_S2D1),
DEF_MOD("cmt3", 300, R8A77970_CLK_R),
DEF_MOD("cmt2", 301, R8A77970_CLK_R),
DEF_MOD("cmt1", 302, R8A77970_CLK_R),
DEF_MOD("cmt0", 303, R8A77970_CLK_R),
DEF_MOD("tpu0", 304, R8A77970_CLK_S2D4),
DEF_MOD("sd-if", 314, R8A77970_CLK_SD0),
DEF_MOD("rwdt", 402, R8A77970_CLK_R),
DEF_MOD("intc-ex", 407, R8A77970_CLK_CP),
DEF_MOD("intc-ap", 408, R8A77970_CLK_S2D1),
DEF_MOD("hscif3", 517, R8A77970_CLK_S2D1),
DEF_MOD("hscif2", 518, R8A77970_CLK_S2D1),
DEF_MOD("hscif1", 519, R8A77970_CLK_S2D1),
DEF_MOD("hscif0", 520, R8A77970_CLK_S2D1),
DEF_MOD("thermal", 522, R8A77970_CLK_CP),
DEF_MOD("pwm", 523, R8A77970_CLK_S2D4),
DEF_MOD("fcpvd0", 603, R8A77970_CLK_S2D1),
DEF_MOD("vspd0", 623, R8A77970_CLK_S2D1),
DEF_MOD("csi40", 716, R8A77970_CLK_CSI0),
DEF_MOD("du0", 724, R8A77970_CLK_S2D1),
DEF_MOD("lvds", 727, R8A77970_CLK_S2D1),
DEF_MOD("vin3", 808, R8A77970_CLK_S2D1),
DEF_MOD("vin2", 809, R8A77970_CLK_S2D1),
DEF_MOD("vin1", 810, R8A77970_CLK_S2D1),
DEF_MOD("vin0", 811, R8A77970_CLK_S2D1),
DEF_MOD("etheravb", 812, R8A77970_CLK_S2D2),
DEF_MOD("gpio5", 907, R8A77970_CLK_CP),
DEF_MOD("gpio4", 908, R8A77970_CLK_CP),
DEF_MOD("gpio3", 909, R8A77970_CLK_CP),
DEF_MOD("gpio2", 910, R8A77970_CLK_CP),
DEF_MOD("gpio1", 911, R8A77970_CLK_CP),
DEF_MOD("gpio0", 912, R8A77970_CLK_CP),
DEF_MOD("can-fd", 914, R8A77970_CLK_S2D2),
DEF_MOD("rpc-if", 917, R8A77970_CLK_RPC),
DEF_MOD("i2c4", 927, R8A77970_CLK_S2D2),
DEF_MOD("i2c3", 928, R8A77970_CLK_S2D2),
DEF_MOD("i2c2", 929, R8A77970_CLK_S2D2),
DEF_MOD("i2c1", 930, R8A77970_CLK_S2D2),
DEF_MOD("i2c0", 931, R8A77970_CLK_S2D2),
};
static const unsigned int r8a77970_crit_mod_clks[] __initconst = {
MOD_CLK_ID(402), /* RWDT */
MOD_CLK_ID(408), /* INTC-AP (GIC) */
};
/*
* CPG Clock Data
*/
/*
* MD EXTAL PLL0 PLL1 PLL3
* 14 13 19 (MHz)
*-------------------------------------------------
* 0 0 0 16.66 x 1 x192 x192 x96
* 0 0 1 16.66 x 1 x192 x192 x80
* 0 1 0 20 x 1 x160 x160 x80
* 0 1 1 20 x 1 x160 x160 x66
* 1 0 0 27 / 2 x236 x236 x118
* 1 0 1 27 / 2 x236 x236 x98
* 1 1 0 33.33 / 2 x192 x192 x96
* 1 1 1 33.33 / 2 x192 x192 x80
*/
#define CPG_PLL_CONFIG_INDEX(md) ((((md) & BIT(14)) >> 12) | \
(((md) & BIT(13)) >> 12) | \
(((md) & BIT(19)) >> 19))
static const struct rcar_gen3_cpg_pll_config cpg_pll_configs[8] __initconst = {
/* EXTAL div PLL1 mult/div PLL3 mult/div */
{ 1, 192, 1, 96, 1, },
{ 1, 192, 1, 80, 1, },
{ 1, 160, 1, 80, 1, },
{ 1, 160, 1, 66, 1, },
{ 2, 236, 1, 118, 1, },
{ 2, 236, 1, 98, 1, },
{ 2, 192, 1, 96, 1, },
{ 2, 192, 1, 80, 1, },
};
static int __init r8a77970_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;
spin_lock_init(&cpg_lock);
cpg_pll_config = &cpg_pll_configs[CPG_PLL_CONFIG_INDEX(cpg_mode)];
return rcar_gen3_cpg_init(cpg_pll_config, CLK_EXTALR, cpg_mode);
}
static struct clk * __init r8a77970_cpg_clk_register(struct device *dev,
const struct cpg_core_clk *core, const struct cpg_mssr_info *info,
struct clk **clks, void __iomem *base,
struct raw_notifier_head *notifiers)
{
const struct clk_div_table *table;
const struct clk *parent;
unsigned int shift;
switch (core->type) {
case CLK_TYPE_R8A77970_SD0H:
table = cpg_sd0h_div_table;
shift = 8;
break;
case CLK_TYPE_R8A77970_SD0:
table = cpg_sd0_div_table;
shift = 4;
break;
default:
return rcar_gen3_cpg_clk_register(dev, core, info, clks, base,
notifiers);
}
parent = clks[core->parent];
if (IS_ERR(parent))
return ERR_CAST(parent);
return clk_register_divider_table(NULL, core->name,
__clk_get_name(parent), 0,
base + CPG_SD0CKCR,
shift, 4, 0, table, &cpg_lock);
}
const struct cpg_mssr_info r8a77970_cpg_mssr_info __initconst = {
/* Core Clocks */
.core_clks = r8a77970_core_clks,
.num_core_clks = ARRAY_SIZE(r8a77970_core_clks),
.last_dt_core_clk = LAST_DT_CORE_CLK,
.num_total_core_clks = MOD_CLK_BASE,
/* Module Clocks */
.mod_clks = r8a77970_mod_clks,
.num_mod_clks = ARRAY_SIZE(r8a77970_mod_clks),
.num_hw_mod_clks = 12 * 32,
/* Critical Module Clocks */
.crit_mod_clks = r8a77970_crit_mod_clks,
.num_crit_mod_clks = ARRAY_SIZE(r8a77970_crit_mod_clks),
/* Callbacks */
.init = r8a77970_cpg_mssr_init,
.cpg_clk_register = r8a77970_cpg_clk_register,
};
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