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// SPDX-License-Identifier: GPL-2.0
/*
* r8a779a0 Clock Pulse Generator / Module Standby and Software Reset
*
* Copyright (C) 2020 Renesas Electronics Corp.
*
* Based on r8a7795-cpg-mssr.c
*
* Copyright (C) 2015 Glider bvba
* Copyright (C) 2015 Renesas Electronics Corp.
*/
#include <linux/bug.h>
#include <linux/bitfield.h>
#include <linux/clk.h>
#include <linux/clk-provider.h>
#include <linux/device.h>
#include <linux/err.h>
#include <linux/init.h>
#include <linux/io.h>
#include <linux/kernel.h>
#include <linux/pm.h>
#include <linux/slab.h>
#include <linux/soc/renesas/rcar-rst.h>
#include <dt-bindings/clock/r8a779a0-cpg-mssr.h>
#include "renesas-cpg-mssr.h"
enum rcar_r8a779a0_clk_types {
CLK_TYPE_R8A779A0_MAIN = CLK_TYPE_CUSTOM,
CLK_TYPE_R8A779A0_PLL1,
CLK_TYPE_R8A779A0_PLL2X_3X, /* PLL[23][01] */
CLK_TYPE_R8A779A0_PLL5,
CLK_TYPE_R8A779A0_MDSEL, /* Select parent/divider using mode pin */
CLK_TYPE_R8A779A0_OSC, /* OSC EXTAL predivider and fixed divider */
};
struct rcar_r8a779a0_cpg_pll_config {
u8 extal_div;
u8 pll1_mult;
u8 pll1_div;
u8 pll5_mult;
u8 pll5_div;
u8 osc_prediv;
};
enum clk_ids {
/* Core Clock Outputs exported to DT */
LAST_DT_CORE_CLK = R8A779A0_CLK_OSC,
/* External Input Clocks */
CLK_EXTAL,
CLK_EXTALR,
/* Internal Core Clocks */
CLK_MAIN,
CLK_PLL1,
CLK_PLL20,
CLK_PLL21,
CLK_PLL30,
CLK_PLL31,
CLK_PLL5,
CLK_PLL1_DIV2,
CLK_PLL20_DIV2,
CLK_PLL21_DIV2,
CLK_PLL30_DIV2,
CLK_PLL31_DIV2,
CLK_PLL5_DIV2,
CLK_PLL5_DIV4,
CLK_S1,
CLK_S3,
CLK_SDSRC,
CLK_RPCSRC,
CLK_OCO,
/* Module Clocks */
MOD_CLK_BASE
};
#define DEF_PLL(_name, _id, _offset) \
DEF_BASE(_name, _id, CLK_TYPE_R8A779A0_PLL2X_3X, CLK_MAIN, \
.offset = _offset)
#define DEF_MDSEL(_name, _id, _md, _parent0, _div0, _parent1, _div1) \
DEF_BASE(_name, _id, CLK_TYPE_R8A779A0_MDSEL, \
(_parent0) << 16 | (_parent1), \
.div = (_div0) << 16 | (_div1), .offset = _md)
#define DEF_OSC(_name, _id, _parent, _div) \
DEF_BASE(_name, _id, CLK_TYPE_R8A779A0_OSC, _parent, .div = _div)
static const struct cpg_core_clk r8a779a0_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_R8A779A0_MAIN, CLK_EXTAL),
DEF_BASE(".pll1", CLK_PLL1, CLK_TYPE_R8A779A0_PLL1, CLK_MAIN),
DEF_BASE(".pll5", CLK_PLL5, CLK_TYPE_R8A779A0_PLL5, CLK_MAIN),
DEF_PLL(".pll20", CLK_PLL20, 0x0834),
DEF_PLL(".pll21", CLK_PLL21, 0x0838),
DEF_PLL(".pll30", CLK_PLL30, 0x083c),
DEF_PLL(".pll31", CLK_PLL31, 0x0840),
DEF_FIXED(".pll1_div2", CLK_PLL1_DIV2, CLK_PLL1, 2, 1),
DEF_FIXED(".pll20_div2", CLK_PLL20_DIV2, CLK_PLL20, 2, 1),
DEF_FIXED(".pll21_div2", CLK_PLL21_DIV2, CLK_PLL21, 2, 1),
DEF_FIXED(".pll30_div2", CLK_PLL30_DIV2, CLK_PLL30, 2, 1),
DEF_FIXED(".pll31_div2", CLK_PLL31_DIV2, CLK_PLL31, 2, 1),
DEF_FIXED(".pll5_div2", CLK_PLL5_DIV2, CLK_PLL5, 2, 1),
DEF_FIXED(".pll5_div4", CLK_PLL5_DIV4, CLK_PLL5_DIV2, 2, 1),
DEF_FIXED(".s1", CLK_S1, CLK_PLL1_DIV2, 2, 1),
DEF_FIXED(".s3", CLK_S3, CLK_PLL1_DIV2, 4, 1),
DEF_RATE(".oco", CLK_OCO, 32768),
/* Core Clock Outputs */
DEF_FIXED("zx", R8A779A0_CLK_ZX, CLK_PLL20_DIV2, 2, 1),
DEF_FIXED("s1d1", R8A779A0_CLK_S1D1, CLK_S1, 1, 1),
DEF_FIXED("s1d2", R8A779A0_CLK_S1D2, CLK_S1, 2, 1),
DEF_FIXED("s1d4", R8A779A0_CLK_S1D4, CLK_S1, 4, 1),
DEF_FIXED("s1d8", R8A779A0_CLK_S1D8, CLK_S1, 8, 1),
DEF_FIXED("s1d12", R8A779A0_CLK_S1D12, CLK_S1, 12, 1),
DEF_FIXED("s3d1", R8A779A0_CLK_S3D1, CLK_S3, 1, 1),
DEF_FIXED("s3d2", R8A779A0_CLK_S3D2, CLK_S3, 2, 1),
DEF_FIXED("s3d4", R8A779A0_CLK_S3D4, CLK_S3, 4, 1),
DEF_FIXED("zs", R8A779A0_CLK_ZS, CLK_PLL1_DIV2, 4, 1),
DEF_FIXED("zt", R8A779A0_CLK_ZT, CLK_PLL1_DIV2, 2, 1),
DEF_FIXED("ztr", R8A779A0_CLK_ZTR, CLK_PLL1_DIV2, 2, 1),
DEF_FIXED("zr", R8A779A0_CLK_ZR, CLK_PLL1_DIV2, 1, 1),
DEF_FIXED("dsi", R8A779A0_CLK_DSI, CLK_PLL5_DIV4, 1, 1),
DEF_FIXED("cnndsp", R8A779A0_CLK_CNNDSP, CLK_PLL5_DIV4, 1, 1),
DEF_FIXED("vip", R8A779A0_CLK_VIP, CLK_PLL5, 5, 1),
DEF_FIXED("adgh", R8A779A0_CLK_ADGH, CLK_PLL5_DIV4, 1, 1),
DEF_FIXED("icu", R8A779A0_CLK_ICU, CLK_PLL5_DIV4, 2, 1),
DEF_FIXED("icud2", R8A779A0_CLK_ICUD2, CLK_PLL5_DIV4, 4, 1),
DEF_FIXED("vcbus", R8A779A0_CLK_VCBUS, CLK_PLL5_DIV4, 1, 1),
DEF_FIXED("cbfusa", R8A779A0_CLK_CBFUSA, CLK_EXTAL, 2, 1),
DEF_DIV6P1("mso", R8A779A0_CLK_MSO, CLK_PLL5_DIV4, 0x87c),
DEF_DIV6P1("canfd", R8A779A0_CLK_CANFD, CLK_PLL5_DIV4, 0x878),
DEF_DIV6P1("csi0", R8A779A0_CLK_CSI0, CLK_PLL5_DIV4, 0x880),
DEF_OSC("osc", R8A779A0_CLK_OSC, CLK_EXTAL, 8),
DEF_MDSEL("r", R8A779A0_CLK_R, 29, CLK_EXTALR, 1, CLK_OCO, 1),
};
static const struct mssr_mod_clk r8a779a0_mod_clks[] __initconst = {
DEF_MOD("scif0", 702, R8A779A0_CLK_S1D8),
DEF_MOD("scif1", 703, R8A779A0_CLK_S1D8),
DEF_MOD("scif3", 704, R8A779A0_CLK_S1D8),
DEF_MOD("scif4", 705, R8A779A0_CLK_S1D8),
};
static spinlock_t cpg_lock;
static const struct rcar_r8a779a0_cpg_pll_config *cpg_pll_config __initdata;
static unsigned int cpg_clk_extalr __initdata;
static u32 cpg_mode __initdata;
struct clk * __init rcar_r8a779a0_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 *parent;
unsigned int mult = 1;
unsigned int div = 1;
u32 value;
parent = clks[core->parent & 0xffff]; /* some types use high bits */
if (IS_ERR(parent))
return ERR_CAST(parent);
switch (core->type) {
case CLK_TYPE_R8A779A0_MAIN:
div = cpg_pll_config->extal_div;
break;
case CLK_TYPE_R8A779A0_PLL1:
mult = cpg_pll_config->pll1_mult;
div = cpg_pll_config->pll1_div;
break;
case CLK_TYPE_R8A779A0_PLL2X_3X:
value = readl(base + core->offset);
mult = (((value >> 24) & 0x7f) + 1) * 2;
break;
case CLK_TYPE_R8A779A0_PLL5:
mult = cpg_pll_config->pll5_mult;
div = cpg_pll_config->pll5_div;
break;
case CLK_TYPE_R8A779A0_MDSEL:
/*
* Clock selectable between two parents and two fixed dividers
* using a mode pin
*/
if (cpg_mode & BIT(core->offset)) {
div = core->div & 0xffff;
} else {
parent = clks[core->parent >> 16];
if (IS_ERR(parent))
return ERR_CAST(parent);
div = core->div >> 16;
}
mult = 1;
break;
case CLK_TYPE_R8A779A0_OSC:
/*
* Clock combining OSC EXTAL predivider and a fixed divider
*/
div = cpg_pll_config->osc_prediv * core->div;
break;
default:
return ERR_PTR(-EINVAL);
}
return clk_register_fixed_factor(NULL, core->name,
__clk_get_name(parent), 0, mult, div);
}
/*
* CPG Clock Data
*/
/*
* MD EXTAL PLL1 PLL20 PLL30 PLL4 PLL5 OSC
* 14 13 (MHz) 21 31
* --------------------------------------------------------
* 0 0 16.66 x 1 x128 x216 x128 x144 x192 /16
* 0 1 20 x 1 x106 x180 x106 x120 x160 /19
* 1 0 Prohibited setting
* 1 1 33.33 / 2 x128 x216 x128 x144 x192 /32
*/
#define CPG_PLL_CONFIG_INDEX(md) ((((md) & BIT(14)) >> 13) | \
(((md) & BIT(13)) >> 13))
static const struct rcar_r8a779a0_cpg_pll_config cpg_pll_configs[4] = {
/* EXTAL div PLL1 mult/div PLL5 mult/div OSC prediv */
{ 1, 128, 1, 192, 1, 16, },
{ 1, 106, 1, 160, 1, 19, },
{ 0, 0, 0, 0, 0, 0, },
{ 2, 128, 1, 192, 1, 32, },
};
static int __init r8a779a0_cpg_mssr_init(struct device *dev)
{
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)];
cpg_clk_extalr = CLK_EXTALR;
spin_lock_init(&cpg_lock);
return 0;
}
const struct cpg_mssr_info r8a779a0_cpg_mssr_info __initconst = {
/* Core Clocks */
.core_clks = r8a779a0_core_clks,
.num_core_clks = ARRAY_SIZE(r8a779a0_core_clks),
.last_dt_core_clk = LAST_DT_CORE_CLK,
.num_total_core_clks = MOD_CLK_BASE,
/* Module Clocks */
.mod_clks = r8a779a0_mod_clks,
.num_mod_clks = ARRAY_SIZE(r8a779a0_mod_clks),
.num_hw_mod_clks = 15 * 32,
/* Callbacks */
.init = r8a779a0_cpg_mssr_init,
.cpg_clk_register = rcar_r8a779a0_cpg_clk_register,
.reg_layout = CLK_REG_LAYOUT_RCAR_V3U,
};
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