Commit 24aaff6a authored by Yoshihiro Shimoda's avatar Yoshihiro Shimoda Committed by Geert Uytterhoeven
Browse files

clk: renesas: cpg-mssr: Add support for R-Car S4-8 



Initial CPG support for R-Car S4-8 (r8a779f0).

Inspired by patches in the BSP by LUU HOAI.

Signed-off-by: default avatarYoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Link: https://lore.kernel.org/r/20211201073308.1003945-10-yoshihiro.shimoda.uh@renesas.com


Signed-off-by: default avatarGeert Uytterhoeven <geert+renesas@glider.be>
parent 39cf7dd2

drivers/clk/renesas/Kconfig

+5 −0
Original line number Diff line number Diff line
@@ -31,6 +31,7 @@ config CLK_RENESAS 
	select CLK_R8A77990 if ARCH_R8A77990

	select CLK_R8A77995 if ARCH_R8A77995

	select CLK_R8A779A0 if ARCH_R8A779A0

	select CLK_R8A779F0 if ARCH_R8A779F0

	select CLK_R9A06G032 if ARCH_R9A06G032

	select CLK_R9A07G044 if ARCH_R9A07G044

	select CLK_SH73A0 if ARCH_SH73A0
@@ -151,6 +152,10 @@ config CLK_R8A779A0 
	bool "R-Car V3U clock support" if COMPILE_TEST

	select CLK_RCAR_GEN4_CPG



config CLK_R8A779F0

	bool "R-Car S4-8 clock support" if COMPILE_TEST

	select CLK_RCAR_GEN4_CPG



config CLK_R9A06G032

	bool "RZ/N1D clock support" if COMPILE_TEST

drivers/clk/renesas/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -28,6 +28,7 @@ obj-$(CONFIG_CLK_R8A77980) += r8a77980-cpg-mssr.o 
obj-$(CONFIG_CLK_R8A77990)		+= r8a77990-cpg-mssr.o

obj-$(CONFIG_CLK_R8A77995)		+= r8a77995-cpg-mssr.o

obj-$(CONFIG_CLK_R8A779A0)		+= r8a779a0-cpg-mssr.o

obj-$(CONFIG_CLK_R8A779F0)		+= r8a779f0-cpg-mssr.o

obj-$(CONFIG_CLK_R9A06G032)		+= r9a06g032-clocks.o

obj-$(CONFIG_CLK_R9A07G044)		+= r9a07g044-cpg.o

obj-$(CONFIG_CLK_SH73A0)		+= clk-sh73a0.o

drivers/clk/renesas/r8a779f0-cpg-mssr.c

0 → 100644
+183 −0
Original line number Diff line number Diff line 
// SPDX-License-Identifier: GPL-2.0

/*

 * r8a779f0 Clock Pulse Generator / Module Standby and Software Reset

 *

 * Copyright (C) 2021 Renesas Electronics Corp.

 *

 * Based on r8a779a0-cpg-mssr.c

 */



#include <linux/bitfield.h>

#include <linux/clk.h>

#include <linux/clk-provider.h>

#include <linux/device.h>

#include <linux/err.h>

#include <linux/kernel.h>

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



#include <dt-bindings/clock/r8a779f0-cpg-mssr.h>



#include "renesas-cpg-mssr.h"

#include "rcar-gen4-cpg.h"



enum clk_ids {

	/* Core Clock Outputs exported to DT */

	LAST_DT_CORE_CLK = R8A779F0_CLK_R,



	/* External Input Clocks */

	CLK_EXTAL,

	CLK_EXTALR,



	/* Internal Core Clocks */

	CLK_MAIN,

	CLK_PLL1,

	CLK_PLL2,

	CLK_PLL3,

	CLK_PLL5,

	CLK_PLL6,

	CLK_PLL1_DIV2,

	CLK_PLL2_DIV2,

	CLK_PLL3_DIV2,

	CLK_PLL5_DIV2,

	CLK_PLL5_DIV4,

	CLK_PLL6_DIV2,

	CLK_S0,

	CLK_SDSRC,

	CLK_RPCSRC,

	CLK_OCO,



	/* Module Clocks */

	MOD_CLK_BASE

};



static const struct cpg_core_clk r8a779f0_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_GEN4_MAIN, CLK_EXTAL),

	DEF_BASE(".pll1", CLK_PLL1,	CLK_TYPE_GEN4_PLL1, CLK_MAIN),

	DEF_BASE(".pll2", CLK_PLL2,	CLK_TYPE_GEN4_PLL2, CLK_MAIN),

	DEF_BASE(".pll3", CLK_PLL3,	CLK_TYPE_GEN4_PLL3, CLK_MAIN),

	DEF_BASE(".pll5", CLK_PLL5,	CLK_TYPE_GEN4_PLL5, CLK_MAIN),

	DEF_BASE(".pll6", CLK_PLL6,	CLK_TYPE_GEN4_PLL6, CLK_MAIN),



	DEF_FIXED(".pll1_div2",	CLK_PLL1_DIV2,	CLK_PLL1,	2, 1),

	DEF_FIXED(".pll2_div2",	CLK_PLL2_DIV2,	CLK_PLL2,	2, 1),

	DEF_FIXED(".pll3_div2",	CLK_PLL3_DIV2,	CLK_PLL3,	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(".pll6_div2",	CLK_PLL6_DIV2,	CLK_PLL6,	2, 1),

	DEF_FIXED(".s0",	CLK_S0,		CLK_PLL1_DIV2,	2, 1),

	DEF_BASE(".sdsrc",	CLK_SDSRC,	CLK_TYPE_GEN4_SDSRC, CLK_PLL5),

	DEF_RATE(".oco",	CLK_OCO,	32768),



	DEF_BASE(".rpcsrc",	CLK_RPCSRC,		CLK_TYPE_GEN4_RPCSRC, CLK_PLL5),

	DEF_BASE(".rpc",	R8A779F0_CLK_RPC,	CLK_TYPE_GEN4_RPC, CLK_RPCSRC),

	DEF_BASE("rpcd2",	R8A779F0_CLK_RPCD2,	CLK_TYPE_GEN4_RPCD2, R8A779F0_CLK_RPC),



	/* Core Clock Outputs */

	DEF_FIXED("s0d2",	R8A779F0_CLK_S0D2,	CLK_S0,		2, 1),

	DEF_FIXED("s0d3",	R8A779F0_CLK_S0D3,	CLK_S0,		3, 1),

	DEF_FIXED("s0d4",	R8A779F0_CLK_S0D4,	CLK_S0,		4, 1),

	DEF_FIXED("cl16m",	R8A779F0_CLK_CL16M,	CLK_S0,		48, 1),

	DEF_FIXED("s0d2_mm",	R8A779F0_CLK_S0D2_MM,	CLK_S0,		2, 1),

	DEF_FIXED("s0d3_mm",	R8A779F0_CLK_S0D3_MM,	CLK_S0,		3, 1),

	DEF_FIXED("s0d4_mm",	R8A779F0_CLK_S0D4_MM,	CLK_S0,		4, 1),

	DEF_FIXED("cl16m_mm",	R8A779F0_CLK_CL16M_MM,	CLK_S0,		48, 1),

	DEF_FIXED("s0d2_rt",	R8A779F0_CLK_S0D2_RT,	CLK_S0,		2, 1),

	DEF_FIXED("s0d3_rt",	R8A779F0_CLK_S0D3_RT,	CLK_S0,		3, 1),

	DEF_FIXED("s0d4_rt",	R8A779F0_CLK_S0D4_RT,	CLK_S0,		4, 1),

	DEF_FIXED("s0d6_rt",	R8A779F0_CLK_S0D6_RT,	CLK_S0,		6, 1),

	DEF_FIXED("cl16m_rt",	R8A779F0_CLK_CL16M_RT,	CLK_S0,		48, 1),

	DEF_FIXED("s0d3_per",	R8A779F0_CLK_S0D3_PER,	CLK_S0,		3, 1),

	DEF_FIXED("s0d6_per",	R8A779F0_CLK_S0D6_PER,	CLK_S0,		6, 1),

	DEF_FIXED("s0d12_per",	R8A779F0_CLK_S0D12_PER,	CLK_S0,		12, 1),

	DEF_FIXED("s0d24_per",	R8A779F0_CLK_S0D24_PER,	CLK_S0,		24, 1),

	DEF_FIXED("cl16m_per",	R8A779F0_CLK_CL16M_PER,	CLK_S0,		48, 1),

	DEF_FIXED("s0d2_hsc",	R8A779F0_CLK_S0D2_HSC,	CLK_S0,		2, 1),

	DEF_FIXED("s0d3_hsc",	R8A779F0_CLK_S0D3_HSC,	CLK_S0,		3, 1),

	DEF_FIXED("s0d4_hsc",	R8A779F0_CLK_S0D4_HSC,	CLK_S0,		4, 1),

	DEF_FIXED("s0d6_hsc",	R8A779F0_CLK_S0D6_HSC,	CLK_S0,		6, 1),

	DEF_FIXED("s0d12_hsc",	R8A779F0_CLK_S0D12_HSC,	CLK_S0,		12, 1),

	DEF_FIXED("cl16m_hsc",	R8A779F0_CLK_CL16M_HSC,	CLK_S0,		48, 1),

	DEF_FIXED("s0d2_cc",	R8A779F0_CLK_S0D2_CC,	CLK_S0,		2, 1),

	DEF_FIXED("rsw2",	R8A779F0_CLK_RSW2,	CLK_PLL5,	2, 1),

	DEF_FIXED("cbfusa",	R8A779F0_CLK_CBFUSA,	CLK_EXTAL,	2, 1),

	DEF_FIXED("cpex",	R8A779F0_CLK_CPEX,	CLK_EXTAL,	2, 1),



	DEF_GEN4_SD("sd0",	R8A779F0_CLK_SD0,	CLK_SDSRC,	0x870),

	DEF_DIV6P1("mso",	R8A779F0_CLK_MSO,	CLK_PLL5_DIV4,	0x87c),



	DEF_GEN4_OSC("osc",	R8A779F0_CLK_OSC,	CLK_EXTAL,	8),

	DEF_GEN4_MDSEL("r",	R8A779F0_CLK_R, 29, CLK_EXTALR, 1, CLK_OCO, 1),

};



static const struct mssr_mod_clk r8a779f0_mod_clks[] __initconst = {

	DEF_MOD("scif0",	702,	R8A779F0_CLK_S0D12_PER),

	DEF_MOD("scif1",	703,	R8A779F0_CLK_S0D12_PER),

	DEF_MOD("scif3",	704,	R8A779F0_CLK_S0D12_PER),

	DEF_MOD("scif4",	705,	R8A779F0_CLK_S0D12_PER),

};



/*

 * CPG Clock Data

 */

/*

 *   MD	 EXTAL		PLL1	PLL2	PLL3	PLL5	PLL6	OSC

 * 14 13 (MHz)

 * ----------------------------------------------------------------

 * 0  0	 16    / 1	x200	x150	x200	x200	x134	/15

 * 0  1	 20    / 1	x160	x120	x160	x160	x106	/19

 * 1  0	 Prohibited setting

 * 1  1	 40    / 2	x160	x120	x160	x160	x106	/38

 */

#define CPG_PLL_CONFIG_INDEX(md)	((((md) & BIT(14)) >> 13) | \

					 (((md) & BIT(13)) >> 13))



static const struct rcar_gen4_cpg_pll_config cpg_pll_configs[4] = {

	/* EXTAL div	PLL1 mult/div	PLL2 mult/div	PLL3 mult/div	PLL5 mult/div	PLL6 mult/div	OSC prediv */

	{ 1,		200,	1,	150,	1,	200,	1,	200,	1,	134,	1,	15,	},

	{ 1,		160,	1,	120,	1,	160,	1,	160,	1,	106,	1,	19,	},

	{ 0,		0,	0,	0,	0,	0,	0,	0,	0,	0,	0,	0,	},

	{ 2,		160,	1,	120,	1,	160,	1,	160,	1,	106,	1,	38,	},

};



static int __init r8a779f0_cpg_mssr_init(struct device *dev)

{

	const struct rcar_gen4_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)];

	if (!cpg_pll_config->extal_div) {

		dev_err(dev, "Prohibited setting (cpg_mode=0x%x)\n", cpg_mode);

		return -EINVAL;

	}



	return rcar_gen4_cpg_init(cpg_pll_config, CLK_EXTALR, cpg_mode);

}



const struct cpg_mssr_info r8a779f0_cpg_mssr_info __initconst = {

	/* Core Clocks */

	.core_clks = r8a779f0_core_clks,

	.num_core_clks = ARRAY_SIZE(r8a779f0_core_clks),

	.last_dt_core_clk = LAST_DT_CORE_CLK,

	.num_total_core_clks = MOD_CLK_BASE,



	/* Module Clocks */

	.mod_clks = r8a779f0_mod_clks,

	.num_mod_clks = ARRAY_SIZE(r8a779f0_mod_clks),

	.num_hw_mod_clks = 28 * 32,



	/* Callbacks */

	.init = r8a779f0_cpg_mssr_init,

	.cpg_clk_register = rcar_gen4_cpg_clk_register,



	.reg_layout = CLK_REG_LAYOUT_RCAR_GEN4,

};

drivers/clk/renesas/renesas-cpg-mssr.c

+6 −0
Original line number Diff line number Diff line
@@ -847,6 +847,12 @@ static const struct of_device_id cpg_mssr_match[] = { 
		.compatible = "renesas,r8a779a0-cpg-mssr",

		.data = &r8a779a0_cpg_mssr_info,

	},

#endif

#ifdef CONFIG_CLK_R8A779F0

	{

		.compatible = "renesas,r8a779f0-cpg-mssr",

		.data = &r8a779f0_cpg_mssr_info,

	},

#endif

	{ /* sentinel */ }

};

drivers/clk/renesas/renesas-cpg-mssr.h

+1 −0
Original line number Diff line number Diff line
@@ -178,6 +178,7 @@ extern const struct cpg_mssr_info r8a77980_cpg_mssr_info; 
extern const struct cpg_mssr_info r8a77990_cpg_mssr_info;

extern const struct cpg_mssr_info r8a77995_cpg_mssr_info;

extern const struct cpg_mssr_info r8a779a0_cpg_mssr_info;

extern const struct cpg_mssr_info r8a779f0_cpg_mssr_info;



void __init cpg_mssr_early_init(struct device_node *np,

				const struct cpg_mssr_info *info);