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clk: mediatek: Add MT8186 mcusys clock support

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

Signed-off-by: Chun-Jie Chen <chun-jie.chen@mediatek.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Reviewed-by: Miles Chen <miles.chen@mediatek.com>
Link: https://lore.kernel.org/r/20220409132251.31725-3-chun-jie.chen@mediatek.com
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
This commit is contained in:
Chun-Jie Chen 2022-04-09 21:22:38 +08:00 committed by Stephen Boyd
parent f113a51aa2
commit 1f2967a17c
3 changed files with 117 additions and 0 deletions
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8
drivers/clk/mediatek/Kconfig
View file

@ -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

1
drivers/clk/mediatek/Makefile
View file

@ -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

108
drivers/clk/mediatek/clk-mt8186-mcu.c Normal file
View file

@ -0,0 +1,108 @@
// 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);