Commit 1f2967a1 authored by Chun-Jie Chen's avatar Chun-Jie Chen Committed by Stephen Boyd
Browse files

clk: mediatek: Add MT8186 mcusys clock support 



Add MT8186 mcusys clock controller which provides muxes
to select the clock source of APMCU.

Signed-off-by: default avatarChun-Jie Chen <chun-jie.chen@mediatek.com>
Reviewed-by: default avatarAngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Reviewed-by: default avatarMiles Chen <miles.chen@mediatek.com>
Link: https://lore.kernel.org/r/20220409132251.31725-3-chun-jie.chen@mediatek.com


Signed-off-by: default avatarStephen Boyd <sboyd@kernel.org>
parent f113a51a

drivers/clk/mediatek/Kconfig

+8 −0
Original line number Diff line number Diff line
@@ -512,6 +512,14 @@ config COMMON_CLK_MT8183_VENCSYS 
	help

	  This driver supports MediaTek MT8183 vencsys clocks.



config COMMON_CLK_MT8186

	bool "Clock driver for MediaTek MT8186"

	depends on ARM64 || COMPILE_TEST

	select COMMON_CLK_MEDIATEK

	default ARCH_MEDIATEK

	help

	  This driver supports MediaTek MT8186 clocks.



config COMMON_CLK_MT8192

	bool "Clock driver for MediaTek MT8192"

	depends on ARM64 || COMPILE_TEST

drivers/clk/mediatek/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -71,6 +71,7 @@ obj-$(CONFIG_COMMON_CLK_MT8183_MFGCFG) += clk-mt8183-mfgcfg.o 
obj-$(CONFIG_COMMON_CLK_MT8183_MMSYS) += clk-mt8183-mm.o

obj-$(CONFIG_COMMON_CLK_MT8183_VDECSYS) += clk-mt8183-vdec.o

obj-$(CONFIG_COMMON_CLK_MT8183_VENCSYS) += clk-mt8183-venc.o

obj-$(CONFIG_COMMON_CLK_MT8186) += clk-mt8186-mcu.o

obj-$(CONFIG_COMMON_CLK_MT8192) += clk-mt8192.o

obj-$(CONFIG_COMMON_CLK_MT8192_AUDSYS) += clk-mt8192-aud.o

obj-$(CONFIG_COMMON_CLK_MT8192_CAMSYS) += clk-mt8192-cam.o

drivers/clk/mediatek/clk-mt8186-mcu.c

0 → 100644
+108 −0
Original line number Diff line number Diff line 
// SPDX-License-Identifier: GPL-2.0-only

//

// Copyright (c) 2022 MediaTek Inc.

// Author: Chun-Jie Chen <chun-jie.chen@mediatek.com>



#include <linux/clk-provider.h>

#include <linux/platform_device.h>

#include <dt-bindings/clock/mt8186-clk.h>



#include "clk-mtk.h"



static const char * const mcu_armpll_ll_parents[] = {

	"clk26m",

	"armpll_ll",

	"mainpll",

	"univpll_d2"

};



static const char * const mcu_armpll_bl_parents[] = {

	"clk26m",

	"armpll_bl",

	"mainpll",

	"univpll_d2"

};



static const char * const mcu_armpll_bus_parents[] = {

	"clk26m",

	"ccipll",

	"mainpll",

	"univpll_d2"

};



/*

 * We only configure the CPU muxes when adjust CPU frequency in MediaTek CPUFreq Driver.

 * Other fields like divider always keep the same value. (set once in bootloader)

 */

static struct mtk_composite mcu_muxes[] = {

	/* CPU_PLLDIV_CFG0 */

	MUX(CLK_MCU_ARMPLL_LL_SEL, "mcu_armpll_ll_sel", mcu_armpll_ll_parents, 0x2A0, 9, 2),

	/* CPU_PLLDIV_CFG1 */

	MUX(CLK_MCU_ARMPLL_BL_SEL, "mcu_armpll_bl_sel", mcu_armpll_bl_parents, 0x2A4, 9, 2),

	/* BUS_PLLDIV_CFG */

	MUX(CLK_MCU_ARMPLL_BUS_SEL, "mcu_armpll_bus_sel", mcu_armpll_bus_parents, 0x2E0, 9, 2),

};



static const struct of_device_id of_match_clk_mt8186_mcu[] = {

	{ .compatible = "mediatek,mt8186-mcusys", },

	{}

};



static int clk_mt8186_mcu_probe(struct platform_device *pdev)

{

	struct clk_onecell_data *clk_data;

	struct device_node *node = pdev->dev.of_node;

	int r;

	void __iomem *base;



	clk_data = mtk_alloc_clk_data(CLK_MCU_NR_CLK);

	if (!clk_data)

		return -ENOMEM;



	base = devm_platform_ioremap_resource(pdev, 0);

	if (IS_ERR(base)) {

		r = PTR_ERR(base);

		goto free_mcu_data;

	}



	r = mtk_clk_register_composites(mcu_muxes, ARRAY_SIZE(mcu_muxes), base,

					NULL, clk_data);

	if (r)

		goto free_mcu_data;



	r = of_clk_add_provider(node, of_clk_src_onecell_get, clk_data);

	if (r)

		goto unregister_composite_muxes;



	platform_set_drvdata(pdev, clk_data);



	return r;



unregister_composite_muxes:

	mtk_clk_unregister_composites(mcu_muxes, ARRAY_SIZE(mcu_muxes), clk_data);

free_mcu_data:

	mtk_free_clk_data(clk_data);

	return r;

}



static int clk_mt8186_mcu_remove(struct platform_device *pdev)

{

	struct clk_onecell_data *clk_data = platform_get_drvdata(pdev);

	struct device_node *node = pdev->dev.of_node;



	of_clk_del_provider(node);

	mtk_clk_unregister_composites(mcu_muxes, ARRAY_SIZE(mcu_muxes), clk_data);

	mtk_free_clk_data(clk_data);



	return 0;

}



static struct platform_driver clk_mt8186_mcu_drv = {

	.probe = clk_mt8186_mcu_probe,

	.remove = clk_mt8186_mcu_remove,

	.driver = {

		.name = "clk-mt8186-mcu",

		.of_match_table = of_match_clk_mt8186_mcu,

	},

};

builtin_platform_driver(clk_mt8186_mcu_drv);