linux-kernel - [PATCH 08/22] clk: mediatek: Add MT8195 ccusys clock support

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Message-ID: <20210616224743.5109-9-chun-jie.chen@mediatek.com>
Date:   Thu, 17 Jun 2021 06:47:29 +0800
From:   Chun-Jie Chen <chun-jie.chen@...iatek.com>
To:     Matthias Brugger <matthias.bgg@...il.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Nicolas Boichat <drinkcat@...omium.org>,
        Rob Herring <robh+dt@...nel.org>
CC:     <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>,
        <linux-mediatek@...ts.infradead.org>, <linux-clk@...r.kernel.org>,
        <devicetree@...r.kernel.org>, <srv_heupstream@...iatek.com>,
        <Project_Global_Chrome_Upstream_Group@...iatek.com>,
        Chun-Jie Chen <chun-jie.chen@...iatek.com>
Subject: [PATCH 08/22] clk: mediatek: Add MT8195 ccusys clock support

Add MT8195 ccusys clock provider

Signed-off-by: Chun-Jie Chen <chun-jie.chen@...iatek.com>
---
 drivers/clk/mediatek/Kconfig          |  6 ++++
 drivers/clk/mediatek/Makefile         |  1 +
 drivers/clk/mediatek/clk-mt8195-ccu.c | 52 +++++++++++++++++++++++++++
 3 files changed, 59 insertions(+)
 create mode 100644 drivers/clk/mediatek/clk-mt8195-ccu.c

diff --git a/drivers/clk/mediatek/Kconfig b/drivers/clk/mediatek/Kconfig
index 515155f3d185..6a6e496d08a4 100644
--- a/drivers/clk/mediatek/Kconfig
+++ b/drivers/clk/mediatek/Kconfig
@@ -606,6 +606,12 @@ config COMMON_CLK_MT8195_CAMSYS
 	help
 	  This driver supports MediaTek MT8195 camsys clocks.
 
+config COMMON_CLK_MT8195_CCUSYS
+	bool "Clock driver for MediaTek MT8195 ccusys"
+	depends on COMMON_CLK_MT8195
+	help
+	  This driver supports MediaTek MT8195 ccusys clocks.
+
 config COMMON_CLK_MT8516
 	bool "Clock driver for MediaTek MT8516"
 	depends on ARCH_MEDIATEK || COMPILE_TEST
diff --git a/drivers/clk/mediatek/Makefile b/drivers/clk/mediatek/Makefile
index 421064e7418c..bb8aac6f9185 100644
--- a/drivers/clk/mediatek/Makefile
+++ b/drivers/clk/mediatek/Makefile
@@ -84,5 +84,6 @@ obj-$(CONFIG_COMMON_CLK_MT8195) += clk-mt8195.o
 obj-$(CONFIG_COMMON_CLK_MT8195_AUDSYS) += clk-mt8195-aud.o
 obj-$(CONFIG_COMMON_CLK_MT8195_AUDSYS_SRC) += clk-mt8195-aud_src.o
 obj-$(CONFIG_COMMON_CLK_MT8195_CAMSYS) += clk-mt8195-cam.o
+obj-$(CONFIG_COMMON_CLK_MT8195_CCUSYS) += clk-mt8195-ccu.o
 obj-$(CONFIG_COMMON_CLK_MT8516) += clk-mt8516.o
 obj-$(CONFIG_COMMON_CLK_MT8516_AUDSYS) += clk-mt8516-aud.o
diff --git a/drivers/clk/mediatek/clk-mt8195-ccu.c b/drivers/clk/mediatek/clk-mt8195-ccu.c
new file mode 100644
index 000000000000..6d8c657bedb3
--- /dev/null
+++ b/drivers/clk/mediatek/clk-mt8195-ccu.c
@@ -0,0 +1,52 @@
+// SPDX-License-Identifier: GPL-2.0-only
+//
+// Copyright (c) 2021 MediaTek Inc.
+// Author: Chun-Jie Chen <chun-jie.chen@...iatek.com>
+
+#include <linux/clk-provider.h>
+#include <linux/platform_device.h>
+
+#include "clk-mtk.h"
+#include "clk-gate.h"
+
+#include <dt-bindings/clock/mt8195-clk.h>
+
+static const struct mtk_gate_regs ccu_cg_regs = {
+	.set_ofs = 0x4,
+	.clr_ofs = 0x8,
+	.sta_ofs = 0x0,
+};
+
+#define GATE_CCU(_id, _name, _parent, _shift)			\
+	GATE_MTK(_id, _name, _parent, &ccu_cg_regs, _shift, &mtk_clk_gate_ops_setclr)
+
+static const struct mtk_gate ccu_clks[] = {
+	GATE_CCU(CLK_CCU_LARB18, "ccu_larb18", "ccu_sel", 0),
+	GATE_CCU(CLK_CCU_AHB, "ccu_ahb", "ccu_sel", 1),
+	GATE_CCU(CLK_CCU_CCU0, "ccu_ccu0", "ccu_sel", 2),
+	GATE_CCU(CLK_CCU_CCU1, "ccu_ccu1", "ccu_sel", 3),
+};
+
+static const struct mtk_clk_desc ccu_desc = {
+	.clks = ccu_clks,
+	.num_clks = ARRAY_SIZE(ccu_clks),
+};
+
+static const struct of_device_id of_match_clk_mt8195_ccu[] = {
+	{
+		.compatible = "mediatek,mt8195-ccusys",
+		.data = &ccu_desc,
+	}, {
+		/* sentinel */
+	}
+};
+
+static struct platform_driver clk_mt8195_ccu_drv = {
+	.probe = mtk_clk_simple_probe,
+	.driver = {
+		.name = "clk-mt8195-ccu",
+		.of_match_table = of_match_clk_mt8195_ccu,
+	},
+};
+
+builtin_platform_driver(clk_mt8195_ccu_drv);
-- 
2.18.0