soc / drm: mediatek: Move mtk mutex driver to soc folder

mtk mutex is used by DRM and MDP driver, and its function is SoC-specific,
so move it to soc folder.

Signed-off-by: CK Hu <ck.hu@mediatek.com>
Signed-off-by: Chun-Kuang Hu <chunkuang.hu@kernel.org>
Acked-by: Matthias Brugger <matthias.bgg@gmail.com>

2 files changed, 475 insertions, 0 deletions

diff --git a/drivers/soc/mediatek/Makefile b/drivers/soc/mediatek/Makefile
index b6908db534c2..90270f8114ed 100644
--- a/drivers/soc/mediatek/Makefile
+++ b/drivers/soc/mediatek/Makefile
@@ -6,3 +6,4 @@ obj-$(CONFIG_MTK_PMIC_WRAP) += mtk-pmic-wrap.o
 obj-$(CONFIG_MTK_SCPSYS) += mtk-scpsys.o
 obj-$(CONFIG_MTK_SCPSYS_PM_DOMAINS) += mtk-pm-domains.o
 obj-$(CONFIG_MTK_MMSYS) += mtk-mmsys.o
+obj-$(CONFIG_MTK_MMSYS) += mtk-mutex.o
diff --git a/drivers/soc/mediatek/mtk-mutex.c b/drivers/soc/mediatek/mtk-mutex.c
new file mode 100644
index 000000000000..f531b119da7a
--- /dev/null
+++ b/drivers/soc/mediatek/mtk-mutex.c
@@ -0,0 +1,474 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) 2015 MediaTek Inc.
+ */
+
+#include <linux/clk.h>
+#include <linux/iopoll.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+#include <linux/soc/mediatek/mtk-mmsys.h>
+#include <linux/soc/mediatek/mtk-mutex.h>
+
+#define MT2701_MUTEX0_MOD0			0x2c
+#define MT2701_MUTEX0_SOF0			0x30
+
+#define DISP_REG_MUTEX_EN(n)			(0x20 + 0x20 * (n))
+#define DISP_REG_MUTEX(n)			(0x24 + 0x20 * (n))
+#define DISP_REG_MUTEX_RST(n)			(0x28 + 0x20 * (n))
+#define DISP_REG_MUTEX_MOD(mutex_mod_reg, n)	(mutex_mod_reg + 0x20 * (n))
+#define DISP_REG_MUTEX_SOF(mutex_sof_reg, n)	(mutex_sof_reg + 0x20 * (n))
+#define DISP_REG_MUTEX_MOD2(n)			(0x34 + 0x20 * (n))
+
+#define INT_MUTEX				BIT(1)
+
+#define MT8167_MUTEX_MOD_DISP_PWM		1
+#define MT8167_MUTEX_MOD_DISP_OVL0		6
+#define MT8167_MUTEX_MOD_DISP_OVL1		7
+#define MT8167_MUTEX_MOD_DISP_RDMA0		8
+#define MT8167_MUTEX_MOD_DISP_RDMA1		9
+#define MT8167_MUTEX_MOD_DISP_WDMA0		10
+#define MT8167_MUTEX_MOD_DISP_CCORR		11
+#define MT8167_MUTEX_MOD_DISP_COLOR		12
+#define MT8167_MUTEX_MOD_DISP_AAL		13
+#define MT8167_MUTEX_MOD_DISP_GAMMA		14
+#define MT8167_MUTEX_MOD_DISP_DITHER		15
+#define MT8167_MUTEX_MOD_DISP_UFOE		16
+
+#define MT8173_MUTEX_MOD_DISP_OVL0		11
+#define MT8173_MUTEX_MOD_DISP_OVL1		12
+#define MT8173_MUTEX_MOD_DISP_RDMA0		13
+#define MT8173_MUTEX_MOD_DISP_RDMA1		14
+#define MT8173_MUTEX_MOD_DISP_RDMA2		15
+#define MT8173_MUTEX_MOD_DISP_WDMA0		16
+#define MT8173_MUTEX_MOD_DISP_WDMA1		17
+#define MT8173_MUTEX_MOD_DISP_COLOR0		18
+#define MT8173_MUTEX_MOD_DISP_COLOR1		19
+#define MT8173_MUTEX_MOD_DISP_AAL		20
+#define MT8173_MUTEX_MOD_DISP_GAMMA		21
+#define MT8173_MUTEX_MOD_DISP_UFOE		22
+#define MT8173_MUTEX_MOD_DISP_PWM0		23
+#define MT8173_MUTEX_MOD_DISP_PWM1		24
+#define MT8173_MUTEX_MOD_DISP_OD		25
+
+#define MT2712_MUTEX_MOD_DISP_PWM2		10
+#define MT2712_MUTEX_MOD_DISP_OVL0		11
+#define MT2712_MUTEX_MOD_DISP_OVL1		12
+#define MT2712_MUTEX_MOD_DISP_RDMA0		13
+#define MT2712_MUTEX_MOD_DISP_RDMA1		14
+#define MT2712_MUTEX_MOD_DISP_RDMA2		15
+#define MT2712_MUTEX_MOD_DISP_WDMA0		16
+#define MT2712_MUTEX_MOD_DISP_WDMA1		17
+#define MT2712_MUTEX_MOD_DISP_COLOR0		18
+#define MT2712_MUTEX_MOD_DISP_COLOR1		19
+#define MT2712_MUTEX_MOD_DISP_AAL0		20
+#define MT2712_MUTEX_MOD_DISP_UFOE		22
+#define MT2712_MUTEX_MOD_DISP_PWM0		23
+#define MT2712_MUTEX_MOD_DISP_PWM1		24
+#define MT2712_MUTEX_MOD_DISP_OD0		25
+#define MT2712_MUTEX_MOD2_DISP_AAL1		33
+#define MT2712_MUTEX_MOD2_DISP_OD1		34
+
+#define MT2701_MUTEX_MOD_DISP_OVL		3
+#define MT2701_MUTEX_MOD_DISP_WDMA		6
+#define MT2701_MUTEX_MOD_DISP_COLOR		7
+#define MT2701_MUTEX_MOD_DISP_BLS		9
+#define MT2701_MUTEX_MOD_DISP_RDMA0		10
+#define MT2701_MUTEX_MOD_DISP_RDMA1		12
+
+#define MT2712_MUTEX_SOF_SINGLE_MODE		0
+#define MT2712_MUTEX_SOF_DSI0			1
+#define MT2712_MUTEX_SOF_DSI1			2
+#define MT2712_MUTEX_SOF_DPI0			3
+#define MT2712_MUTEX_SOF_DPI1			4
+#define MT2712_MUTEX_SOF_DSI2			5
+#define MT2712_MUTEX_SOF_DSI3			6
+#define MT8167_MUTEX_SOF_DPI0			2
+#define MT8167_MUTEX_SOF_DPI1			3
+
+struct mtk_mutex {
+	int id;
+	bool claimed;
+};
+
+enum mtk_mutex_sof_id {
+	MUTEX_SOF_SINGLE_MODE,
+	MUTEX_SOF_DSI0,
+	MUTEX_SOF_DSI1,
+	MUTEX_SOF_DPI0,
+	MUTEX_SOF_DPI1,
+	MUTEX_SOF_DSI2,
+	MUTEX_SOF_DSI3,
+};
+
+struct mtk_mutex_data {
+	const unsigned int *mutex_mod;
+	const unsigned int *mutex_sof;
+	const unsigned int mutex_mod_reg;
+	const unsigned int mutex_sof_reg;
+	const bool no_clk;
+};
+
+struct mtk_mutex_ctx {
+	struct device			*dev;
+	struct clk			*clk;
+	void __iomem			*regs;
+	struct mtk_mutex		mutex[10];
+	const struct mtk_mutex_data	*data;
+};
+
+static const unsigned int mt2701_mutex_mod[DDP_COMPONENT_ID_MAX] = {
+	[DDP_COMPONENT_BLS] = MT2701_MUTEX_MOD_DISP_BLS,
+	[DDP_COMPONENT_COLOR0] = MT2701_MUTEX_MOD_DISP_COLOR,
+	[DDP_COMPONENT_OVL0] = MT2701_MUTEX_MOD_DISP_OVL,
+	[DDP_COMPONENT_RDMA0] = MT2701_MUTEX_MOD_DISP_RDMA0,
+	[DDP_COMPONENT_RDMA1] = MT2701_MUTEX_MOD_DISP_RDMA1,
+	[DDP_COMPONENT_WDMA0] = MT2701_MUTEX_MOD_DISP_WDMA,
+};
+
+static const unsigned int mt2712_mutex_mod[DDP_COMPONENT_ID_MAX] = {
+	[DDP_COMPONENT_AAL0] = MT2712_MUTEX_MOD_DISP_AAL0,
+	[DDP_COMPONENT_AAL1] = MT2712_MUTEX_MOD2_DISP_AAL1,
+	[DDP_COMPONENT_COLOR0] = MT2712_MUTEX_MOD_DISP_COLOR0,
+	[DDP_COMPONENT_COLOR1] = MT2712_MUTEX_MOD_DISP_COLOR1,
+	[DDP_COMPONENT_OD0] = MT2712_MUTEX_MOD_DISP_OD0,
+	[DDP_COMPONENT_OD1] = MT2712_MUTEX_MOD2_DISP_OD1,
+	[DDP_COMPONENT_OVL0] = MT2712_MUTEX_MOD_DISP_OVL0,
+	[DDP_COMPONENT_OVL1] = MT2712_MUTEX_MOD_DISP_OVL1,
+	[DDP_COMPONENT_PWM0] = MT2712_MUTEX_MOD_DISP_PWM0,
+	[DDP_COMPONENT_PWM1] = MT2712_MUTEX_MOD_DISP_PWM1,
+	[DDP_COMPONENT_PWM2] = MT2712_MUTEX_MOD_DISP_PWM2,
+	[DDP_COMPONENT_RDMA0] = MT2712_MUTEX_MOD_DISP_RDMA0,
+	[DDP_COMPONENT_RDMA1] = MT2712_MUTEX_MOD_DISP_RDMA1,
+	[DDP_COMPONENT_RDMA2] = MT2712_MUTEX_MOD_DISP_RDMA2,
+	[DDP_COMPONENT_UFOE] = MT2712_MUTEX_MOD_DISP_UFOE,
+	[DDP_COMPONENT_WDMA0] = MT2712_MUTEX_MOD_DISP_WDMA0,
+	[DDP_COMPONENT_WDMA1] = MT2712_MUTEX_MOD_DISP_WDMA1,
+};
+
+static const unsigned int mt8167_mutex_mod[DDP_COMPONENT_ID_MAX] = {
+	[DDP_COMPONENT_AAL0] = MT8167_MUTEX_MOD_DISP_AAL,
+	[DDP_COMPONENT_CCORR] = MT8167_MUTEX_MOD_DISP_CCORR,
+	[DDP_COMPONENT_COLOR0] = MT8167_MUTEX_MOD_DISP_COLOR,
+	[DDP_COMPONENT_DITHER] = MT8167_MUTEX_MOD_DISP_DITHER,
+	[DDP_COMPONENT_GAMMA] = MT8167_MUTEX_MOD_DISP_GAMMA,
+	[DDP_COMPONENT_OVL0] = MT8167_MUTEX_MOD_DISP_OVL0,
+	[DDP_COMPONENT_OVL1] = MT8167_MUTEX_MOD_DISP_OVL1,
+	[DDP_COMPONENT_PWM0] = MT8167_MUTEX_MOD_DISP_PWM,
+	[DDP_COMPONENT_RDMA0] = MT8167_MUTEX_MOD_DISP_RDMA0,
+	[DDP_COMPONENT_RDMA1] = MT8167_MUTEX_MOD_DISP_RDMA1,
+	[DDP_COMPONENT_UFOE] = MT8167_MUTEX_MOD_DISP_UFOE,
+	[DDP_COMPONENT_WDMA0] = MT8167_MUTEX_MOD_DISP_WDMA0,
+};
+
+static const unsigned int mt8173_mutex_mod[DDP_COMPONENT_ID_MAX] = {
+	[DDP_COMPONENT_AAL0] = MT8173_MUTEX_MOD_DISP_AAL,
+	[DDP_COMPONENT_COLOR0] = MT8173_MUTEX_MOD_DISP_COLOR0,
+	[DDP_COMPONENT_COLOR1] = MT8173_MUTEX_MOD_DISP_COLOR1,
+	[DDP_COMPONENT_GAMMA] = MT8173_MUTEX_MOD_DISP_GAMMA,
+	[DDP_COMPONENT_OD0] = MT8173_MUTEX_MOD_DISP_OD,
+	[DDP_COMPONENT_OVL0] = MT8173_MUTEX_MOD_DISP_OVL0,
+	[DDP_COMPONENT_OVL1] = MT8173_MUTEX_MOD_DISP_OVL1,
+	[DDP_COMPONENT_PWM0] = MT8173_MUTEX_MOD_DISP_PWM0,
+	[DDP_COMPONENT_PWM1] = MT8173_MUTEX_MOD_DISP_PWM1,
+	[DDP_COMPONENT_RDMA0] = MT8173_MUTEX_MOD_DISP_RDMA0,
+	[DDP_COMPONENT_RDMA1] = MT8173_MUTEX_MOD_DISP_RDMA1,
+	[DDP_COMPONENT_RDMA2] = MT8173_MUTEX_MOD_DISP_RDMA2,
+	[DDP_COMPONENT_UFOE] = MT8173_MUTEX_MOD_DISP_UFOE,
+	[DDP_COMPONENT_WDMA0] = MT8173_MUTEX_MOD_DISP_WDMA0,
+	[DDP_COMPONENT_WDMA1] = MT8173_MUTEX_MOD_DISP_WDMA1,
+};
+
+static const unsigned int mt2712_mutex_sof[MUTEX_SOF_DSI3 + 1] = {
+	[MUTEX_SOF_SINGLE_MODE] = MUTEX_SOF_SINGLE_MODE,
+	[MUTEX_SOF_DSI0] = MUTEX_SOF_DSI0,
+	[MUTEX_SOF_DSI1] = MUTEX_SOF_DSI1,
+	[MUTEX_SOF_DPI0] = MUTEX_SOF_DPI0,
+	[MUTEX_SOF_DPI1] = MUTEX_SOF_DPI1,
+	[MUTEX_SOF_DSI2] = MUTEX_SOF_DSI2,
+	[MUTEX_SOF_DSI3] = MUTEX_SOF_DSI3,
+};
+
+static const unsigned int mt8167_mutex_sof[MUTEX_SOF_DSI3 + 1] = {
+	[MUTEX_SOF_SINGLE_MODE] = MUTEX_SOF_SINGLE_MODE,
+	[MUTEX_SOF_DSI0] = MUTEX_SOF_DSI0,
+	[MUTEX_SOF_DPI0] = MT8167_MUTEX_SOF_DPI0,
+	[MUTEX_SOF_DPI1] = MT8167_MUTEX_SOF_DPI1,
+};
+
+static const struct mtk_mutex_data mt2701_mutex_driver_data = {
+	.mutex_mod = mt2701_mutex_mod,
+	.mutex_sof = mt2712_mutex_sof,
+	.mutex_mod_reg = MT2701_MUTEX0_MOD0,
+	.mutex_sof_reg = MT2701_MUTEX0_SOF0,
+};
+
+static const struct mtk_mutex_data mt2712_mutex_driver_data = {
+	.mutex_mod = mt2712_mutex_mod,
+	.mutex_sof = mt2712_mutex_sof,
+	.mutex_mod_reg = MT2701_MUTEX0_MOD0,
+	.mutex_sof_reg = MT2701_MUTEX0_SOF0,
+};
+
+static const struct mtk_mutex_data mt8167_mutex_driver_data = {
+	.mutex_mod = mt8167_mutex_mod,
+	.mutex_sof = mt8167_mutex_sof,
+	.mutex_mod_reg = MT2701_MUTEX0_MOD0,
+	.mutex_sof_reg = MT2701_MUTEX0_SOF0,
+	.no_clk = true,
+};
+
+static const struct mtk_mutex_data mt8173_mutex_driver_data = {
+	.mutex_mod = mt8173_mutex_mod,
+	.mutex_sof = mt2712_mutex_sof,
+	.mutex_mod_reg = MT2701_MUTEX0_MOD0,
+	.mutex_sof_reg = MT2701_MUTEX0_SOF0,
+};
+
+struct mtk_mutex *mtk_mutex_get(struct device *dev)
+{
+	struct mtk_mutex_ctx *mtx = dev_get_drvdata(dev);
+	int i;
+
+	for (i = 0; i < 10; i++)
+		if (!mtx->mutex[i].claimed) {
+			mtx->mutex[i].claimed = true;
+			return &mtx->mutex[i];
+		}
+
+	return ERR_PTR(-EBUSY);
+}
+EXPORT_SYMBOL_GPL(mtk_mutex_get);
+
+void mtk_mutex_put(struct mtk_mutex *mutex)
+{
+	struct mtk_mutex_ctx *mtx = container_of(mutex, struct mtk_mutex_ctx,
+						 mutex[mutex->id]);
+
+	WARN_ON(&mtx->mutex[mutex->id] != mutex);
+
+	mutex->claimed = false;
+}
+EXPORT_SYMBOL_GPL(mtk_mutex_put);
+
+int mtk_mutex_prepare(struct mtk_mutex *mutex)
+{
+	struct mtk_mutex_ctx *mtx = container_of(mutex, struct mtk_mutex_ctx,
+						 mutex[mutex->id]);
+	return clk_prepare_enable(mtx->clk);
+}
+EXPORT_SYMBOL_GPL(mtk_mutex_prepare);
+
+void mtk_mutex_unprepare(struct mtk_mutex *mutex)
+{
+	struct mtk_mutex_ctx *mtx = container_of(mutex, struct mtk_mutex_ctx,
+						 mutex[mutex->id]);
+	clk_disable_unprepare(mtx->clk);
+}
+EXPORT_SYMBOL_GPL(mtk_mutex_unprepare);
+
+void mtk_mutex_add_comp(struct mtk_mutex *mutex,
+			enum mtk_ddp_comp_id id)
+{
+	struct mtk_mutex_ctx *mtx = container_of(mutex, struct mtk_mutex_ctx,
+						 mutex[mutex->id]);
+	unsigned int reg;
+	unsigned int sof_id;
+	unsigned int offset;
+
+	WARN_ON(&mtx->mutex[mutex->id] != mutex);
+
+	switch (id) {
+	case DDP_COMPONENT_DSI0:
+		sof_id = MUTEX_SOF_DSI0;
+		break;
+	case DDP_COMPONENT_DSI1:
+		sof_id = MUTEX_SOF_DSI0;
+		break;
+	case DDP_COMPONENT_DSI2:
+		sof_id = MUTEX_SOF_DSI2;
+		break;
+	case DDP_COMPONENT_DSI3:
+		sof_id = MUTEX_SOF_DSI3;
+		break;
+	case DDP_COMPONENT_DPI0:
+		sof_id = MUTEX_SOF_DPI0;
+		break;
+	case DDP_COMPONENT_DPI1:
+		sof_id = MUTEX_SOF_DPI1;
+		break;
+	default:
+		if (mtx->data->mutex_mod[id] < 32) {
+			offset = DISP_REG_MUTEX_MOD(mtx->data->mutex_mod_reg,
+						    mutex->id);
+			reg = readl_relaxed(mtx->regs + offset);
+			reg |= 1 << mtx->data->mutex_mod[id];
+			writel_relaxed(reg, mtx->regs + offset);
+		} else {
+			offset = DISP_REG_MUTEX_MOD2(mutex->id);
+			reg = readl_relaxed(mtx->regs + offset);
+			reg |= 1 << (mtx->data->mutex_mod[id] - 32);
+			writel_relaxed(reg, mtx->regs + offset);
+		}
+		return;
+	}
+
+	writel_relaxed(mtx->data->mutex_sof[sof_id],
+		       mtx->regs +
+		       DISP_REG_MUTEX_SOF(mtx->data->mutex_sof_reg, mutex->id));
+}
+EXPORT_SYMBOL_GPL(mtk_mutex_add_comp);
+
+void mtk_mutex_remove_comp(struct mtk_mutex *mutex,
+			   enum mtk_ddp_comp_id id)
+{
+	struct mtk_mutex_ctx *mtx = container_of(mutex, struct mtk_mutex_ctx,
+						 mutex[mutex->id]);
+	unsigned int reg;
+	unsigned int offset;
+
+	WARN_ON(&mtx->mutex[mutex->id] != mutex);
+
+	switch (id) {
+	case DDP_COMPONENT_DSI0:
+	case DDP_COMPONENT_DSI1:
+	case DDP_COMPONENT_DSI2:
+	case DDP_COMPONENT_DSI3:
+	case DDP_COMPONENT_DPI0:
+	case DDP_COMPONENT_DPI1:
+		writel_relaxed(MUTEX_SOF_SINGLE_MODE,
+			       mtx->regs +
+			       DISP_REG_MUTEX_SOF(mtx->data->mutex_sof_reg,
+						  mutex->id));
+		break;
+	default:
+		if (mtx->data->mutex_mod[id] < 32) {
+			offset = DISP_REG_MUTEX_MOD(mtx->data->mutex_mod_reg,
+						    mutex->id);
+			reg = readl_relaxed(mtx->regs + offset);
+			reg &= ~(1 << mtx->data->mutex_mod[id]);
+			writel_relaxed(reg, mtx->regs + offset);
+		} else {
+			offset = DISP_REG_MUTEX_MOD2(mutex->id);
+			reg = readl_relaxed(mtx->regs + offset);
+			reg &= ~(1 << (mtx->data->mutex_mod[id] - 32));
+			writel_relaxed(reg, mtx->regs + offset);
+		}
+		break;
+	}
+}
+EXPORT_SYMBOL_GPL(mtk_mutex_remove_comp);
+
+void mtk_mutex_enable(struct mtk_mutex *mutex)
+{
+	struct mtk_mutex_ctx *mtx = container_of(mutex, struct mtk_mutex_ctx,
+						 mutex[mutex->id]);
+
+	WARN_ON(&mtx->mutex[mutex->id] != mutex);
+
+	writel(1, mtx->regs + DISP_REG_MUTEX_EN(mutex->id));
+}
+EXPORT_SYMBOL_GPL(mtk_mutex_enable);
+
+void mtk_mutex_disable(struct mtk_mutex *mutex)
+{
+	struct mtk_mutex_ctx *mtx = container_of(mutex, struct mtk_mutex_ctx,
+						 mutex[mutex->id]);
+
+	WARN_ON(&mtx->mutex[mutex->id] != mutex);
+
+	writel(0, mtx->regs + DISP_REG_MUTEX_EN(mutex->id));
+}
+EXPORT_SYMBOL_GPL(mtk_mutex_disable);
+
+void mtk_mutex_acquire(struct mtk_mutex *mutex)
+{
+	struct mtk_mutex_ctx *mtx = container_of(mutex, struct mtk_mutex_ctx,
+						 mutex[mutex->id]);
+	u32 tmp;
+
+	writel(1, mtx->regs + DISP_REG_MUTEX_EN(mutex->id));
+	writel(1, mtx->regs + DISP_REG_MUTEX(mutex->id));
+	if (readl_poll_timeout_atomic(mtx->regs + DISP_REG_MUTEX(mutex->id),
+				      tmp, tmp & INT_MUTEX, 1, 10000))
+		pr_err("could not acquire mutex %d\n", mutex->id);
+}
+EXPORT_SYMBOL_GPL(mtk_mutex_acquire);
+
+void mtk_mutex_release(struct mtk_mutex *mutex)
+{
+	struct mtk_mutex_ctx *mtx = container_of(mutex, struct mtk_mutex_ctx,
+						 mutex[mutex->id]);
+
+	writel(0, mtx->regs + DISP_REG_MUTEX(mutex->id));
+}
+EXPORT_SYMBOL_GPL(mtk_mutex_release);
+
+static int mtk_mutex_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct mtk_mutex_ctx *mtx;
+	struct resource *regs;
+	int i;
+
+	mtx = devm_kzalloc(dev, sizeof(*mtx), GFP_KERNEL);
+	if (!mtx)
+		return -ENOMEM;
+
+	for (i = 0; i < 10; i++)
+		mtx->mutex[i].id = i;
+
+	mtx->data = of_device_get_match_data(dev);
+
+	if (!mtx->data->no_clk) {
+		mtx->clk = devm_clk_get(dev, NULL);
+		if (IS_ERR(mtx->clk)) {
+			if (PTR_ERR(mtx->clk) != -EPROBE_DEFER)
+				dev_err(dev, "Failed to get clock\n");
+			return PTR_ERR(mtx->clk);
+		}
+	}
+
+	regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	mtx->regs = devm_ioremap_resource(dev, regs);
+	if (IS_ERR(mtx->regs)) {
+		dev_err(dev, "Failed to map mutex registers\n");
+		return PTR_ERR(mtx->regs);
+	}
+
+	platform_set_drvdata(pdev, mtx);
+
+	return 0;
+}
+
+static int mtk_mutex_remove(struct platform_device *pdev)
+{
+	return 0;
+}
+
+static const struct of_device_id mutex_driver_dt_match[] = {
+	{ .compatible = "mediatek,mt2701-disp-mutex",
+	  .data = &mt2701_mutex_driver_data},
+	{ .compatible = "mediatek,mt2712-disp-mutex",
+	  .data = &mt2712_mutex_driver_data},
+	{ .compatible = "mediatek,mt8167-disp-mutex",
+	  .data = &mt8167_mutex_driver_data},
+	{ .compatible = "mediatek,mt8173-disp-mutex",
+	  .data = &mt8173_mutex_driver_data},
+	{},
+};
+MODULE_DEVICE_TABLE(of, mutex_driver_dt_match);
+
+struct platform_driver mtk_mutex_driver = {
+	.probe		= mtk_mutex_probe,
+	.remove		= mtk_mutex_remove,
+	.driver		= {
+		.name	= "mediatek-mutex",
+		.owner	= THIS_MODULE,
+		.of_match_table = mutex_driver_dt_match,
+	},
+};
+
+builtin_platform_driver(mtk_mutex_driver);