linux-kernel - [PATCH 24/30] clk: mediatek: Add MT8196 disp-ao clock support

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Message-Id: <20250623102940.214269-25-laura.nao@collabora.com>
Date: Mon, 23 Jun 2025 12:29:34 +0200
From: Laura Nao <laura.nao@...labora.com>
To: mturquette@...libre.com,
	sboyd@...nel.org,
	robh@...nel.org,
	krzk+dt@...nel.org,
	conor+dt@...nel.org,
	matthias.bgg@...il.com,
	angelogioacchino.delregno@...labora.com,
	p.zabel@...gutronix.de,
	richardcochran@...il.com
Cc: guangjie.song@...iatek.com,
	wenst@...omium.org,
	linux-clk@...r.kernel.org,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-mediatek@...ts.infradead.org,
	netdev@...r.kernel.org,
	kernel@...labora.com,
	Laura Nao <laura.nao@...labora.com>
Subject: [PATCH 24/30] clk: mediatek: Add MT8196 disp-ao clock support

Add support for the MT8196 disp-ao clock controller, which provides
clock gate control for the display system. It is integrated with the
mtk-mmsys driver, which registers the disp-ao clock driver via
platform_device_register_data().

Signed-off-by: Laura Nao <laura.nao@...labora.com>
---
 drivers/clk/mediatek/Makefile              |  2 +-
 drivers/clk/mediatek/clk-mt8196-vdisp_ao.c | 78 ++++++++++++++++++++++
 2 files changed, 79 insertions(+), 1 deletion(-)
 create mode 100644 drivers/clk/mediatek/clk-mt8196-vdisp_ao.c

diff --git a/drivers/clk/mediatek/Makefile b/drivers/clk/mediatek/Makefile
index 18ada357e6ae..112607da29ab 100644
--- a/drivers/clk/mediatek/Makefile
+++ b/drivers/clk/mediatek/Makefile
@@ -168,7 +168,7 @@ obj-$(CONFIG_COMMON_CLK_MT8196_IMP_IIC_WRAP) += clk-mt8196-imp_iic_wrap.o
 obj-$(CONFIG_COMMON_CLK_MT8196_MCUSYS) += clk-mt8196-mcu.o
 obj-$(CONFIG_COMMON_CLK_MT8196_MDPSYS) += clk-mt8196-mdpsys.o
 obj-$(CONFIG_COMMON_CLK_MT8196_MFGCFG) += clk-mt8196-mfg.o
-obj-$(CONFIG_COMMON_CLK_MT8196_MMSYS) += clk-mt8196-disp0.o clk-mt8196-disp1.o
+obj-$(CONFIG_COMMON_CLK_MT8196_MMSYS) += clk-mt8196-disp0.o clk-mt8196-disp1.o clk-mt8196-vdisp_ao.o
 obj-$(CONFIG_COMMON_CLK_MT8196_PEXTPSYS) += clk-mt8196-pextp.o
 obj-$(CONFIG_COMMON_CLK_MT8196_UFSSYS) += clk-mt8196-ufs_ao.o
 obj-$(CONFIG_COMMON_CLK_MT8365) += clk-mt8365-apmixedsys.o clk-mt8365.o
diff --git a/drivers/clk/mediatek/clk-mt8196-vdisp_ao.c b/drivers/clk/mediatek/clk-mt8196-vdisp_ao.c
new file mode 100644
index 000000000000..2bac2f59b07d
--- /dev/null
+++ b/drivers/clk/mediatek/clk-mt8196-vdisp_ao.c
@@ -0,0 +1,78 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) 2025 MediaTek Inc.
+ *                    Guangjie Song <guangjie.song@...iatek.com>
+ * Copyright (c) 2025 Collabora Ltd.
+ *                    Laura Nao <laura.nao@...labora.com>
+ */
+#include <dt-bindings/clock/mediatek,mt8196-clock.h>
+#include <linux/clk-provider.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+
+#include "clk-gate.h"
+#include "clk-mtk.h"
+
+static const struct mtk_gate_regs mm_v_cg_regs = {
+	.set_ofs = 0x104,
+	.clr_ofs = 0x108,
+	.sta_ofs = 0x100,
+};
+
+static const struct mtk_gate_regs mm_v_hwv_regs = {
+	.set_ofs = 0x0030,
+	.clr_ofs = 0x0034,
+	.sta_ofs = 0x2c18,
+};
+
+#define GATE_MM_AO_V(_id, _name, _parent, _shift) {	\
+		.id = _id,				\
+		.name = _name,				\
+		.parent_name = _parent,			\
+		.regs = &mm_v_cg_regs,			\
+		.shift = _shift,			\
+		.ops = &mtk_clk_gate_ops_setclr,	\
+		.flags = CLK_OPS_PARENT_ENABLE |	\
+			 CLK_IS_CRITICAL,		\
+	}
+
+#define GATE_HWV_MM_V(_id, _name, _parent, _shift) {	\
+		.id = _id,				\
+		.name = _name,				\
+		.parent_name = _parent,			\
+		.regs = &mm_v_cg_regs,			\
+		.hwv_regs = &mm_v_hwv_regs,		\
+		.shift = _shift,			\
+		.ops = &mtk_clk_gate_hwv_ops_setclr,	\
+		.flags = CLK_OPS_PARENT_ENABLE,		\
+	}
+
+static const struct mtk_gate mm_v_clks[] = {
+	GATE_HWV_MM_V(CLK_MM_V_DISP_VDISP_AO_CONFIG, "mm_v_disp_vdisp_ao_config", "disp", 0),
+	GATE_HWV_MM_V(CLK_MM_V_DISP_DPC, "mm_v_disp_dpc", "disp", 16),
+	GATE_MM_AO_V(CLK_MM_V_SMI_SUB_SOMM0, "mm_v_smi_sub_somm0", "disp", 2),
+};
+
+static const struct mtk_clk_desc mm_v_mcd = {
+	.clks = mm_v_clks,
+	.num_clks = ARRAY_SIZE(mm_v_clks),
+};
+
+static const struct of_device_id of_match_clk_mt8196_vdisp_ao[] = {
+	{ .compatible = "mediatek,mt8196-vdisp-ao", .data = &mm_v_mcd },
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, of_match_clk_mt8196_vdisp_ao);
+
+static struct platform_driver clk_mt8196_vdisp_ao_drv = {
+	.probe = mtk_clk_pdev_probe,
+	.remove = mtk_clk_pdev_remove,
+	.driver = {
+		.name = "clk-mt8196-vdisp-ao",
+	},
+};
+module_platform_driver(clk_mt8196_vdisp_ao_drv);
+
+MODULE_DESCRIPTION("MediaTek MT8196 vdisp_ao clocks driver");
+MODULE_LICENSE("GPL");
-- 
2.39.5