2 files changed, 28 insertions, 13 deletions

diff --git a/drivers/soc/mediatek/mtk-mmsys.c b/drivers/soc/mediatek/mtk-mmsys.c
index a0a584f16405..32b17c56c44a 100644
--- a/drivers/soc/mediatek/mtk-mmsys.c
+++ b/drivers/soc/mediatek/mtk-mmsys.c
@@ -22,6 +22,8 @@
 #include "mt8195-mmsys.h"
 #include "mt8365-mmsys.h"
 
+#define MMSYS_SW_RESET_PER_REG 32
+
 static const struct mtk_mmsys_driver_data mt2701_mmsys_driver_data = {
 	.clk_driver = "clk-mt2701-mm",
 	.routes = mmsys_default_routing_table,
@@ -53,6 +55,7 @@ static const struct mtk_mmsys_driver_data mt8173_mmsys_driver_data = {
 	.routes = mmsys_default_routing_table,
 	.num_routes = ARRAY_SIZE(mmsys_default_routing_table),
 	.sw0_rst_offset = MT8183_MMSYS_SW0_RST_B,
+	.num_resets = 32,
 };
 
 static const struct mtk_mmsys_driver_data mt8183_mmsys_driver_data = {
@@ -60,6 +63,7 @@ static const struct mtk_mmsys_driver_data mt8183_mmsys_driver_data = {
 	.routes = mmsys_mt8183_routing_table,
 	.num_routes = ARRAY_SIZE(mmsys_mt8183_routing_table),
 	.sw0_rst_offset = MT8183_MMSYS_SW0_RST_B,
+	.num_resets = 32,
 };
 
 static const struct mtk_mmsys_driver_data mt8186_mmsys_driver_data = {
@@ -67,6 +71,7 @@ static const struct mtk_mmsys_driver_data mt8186_mmsys_driver_data = {
 	.routes = mmsys_mt8186_routing_table,
 	.num_routes = ARRAY_SIZE(mmsys_mt8186_routing_table),
 	.sw0_rst_offset = MT8186_MMSYS_SW0_RST_B,
+	.num_resets = 32,
 };
 
 static const struct mtk_mmsys_driver_data mt8188_vdosys0_driver_data = {
@@ -80,6 +85,7 @@ static const struct mtk_mmsys_driver_data mt8192_mmsys_driver_data = {
 	.routes = mmsys_mt8192_routing_table,
 	.num_routes = ARRAY_SIZE(mmsys_mt8192_routing_table),
 	.sw0_rst_offset = MT8186_MMSYS_SW0_RST_B,
+	.num_resets = 32,
 };
 
 static const struct mtk_mmsys_driver_data mt8195_vdosys0_driver_data = {
@@ -229,13 +235,19 @@ static int mtk_mmsys_reset_update(struct reset_controller_dev *rcdev, unsigned l
 {
 	struct mtk_mmsys *mmsys = container_of(rcdev, struct mtk_mmsys, rcdev);
 	unsigned long flags;
+	u32 offset;
+	u32 reg;
+
+	offset = (id / MMSYS_SW_RESET_PER_REG) * sizeof(u32);
+	id = id % MMSYS_SW_RESET_PER_REG;
+	reg = mmsys->data->sw0_rst_offset + offset;
 
 	spin_lock_irqsave(&mmsys->lock, flags);
 
 	if (assert)
-		mtk_mmsys_update_bits(mmsys, mmsys->data->sw0_rst_offset, BIT(id), 0, NULL);
+		mtk_mmsys_update_bits(mmsys, reg, BIT(id), 0, NULL);
 	else
-		mtk_mmsys_update_bits(mmsys, mmsys->data->sw0_rst_offset, BIT(id), BIT(id), NULL);
+		mtk_mmsys_update_bits(mmsys, reg, BIT(id), BIT(id), NULL);
 
 	spin_unlock_irqrestore(&mmsys->lock, flags);
 
@@ -290,20 +302,22 @@ static int mtk_mmsys_probe(struct platform_device *pdev)
 		return ret;
 	}
 
-	spin_lock_init(&mmsys->lock);
+	mmsys->data = of_device_get_match_data(&pdev->dev);
 
-	mmsys->rcdev.owner = THIS_MODULE;
-	mmsys->rcdev.nr_resets = 32;
-	mmsys->rcdev.ops = &mtk_mmsys_reset_ops;
-	mmsys->rcdev.of_node = pdev->dev.of_node;
-	ret = devm_reset_controller_register(&pdev->dev, &mmsys->rcdev);
-	if (ret) {
-		dev_err(&pdev->dev, "Couldn't register mmsys reset controller: %d\n", ret);
-		return ret;
+	if (mmsys->data->num_resets > 0) {
+		spin_lock_init(&mmsys->lock);
+
+		mmsys->rcdev.owner = THIS_MODULE;
+		mmsys->rcdev.nr_resets = mmsys->data->num_resets;
+		mmsys->rcdev.ops = &mtk_mmsys_reset_ops;
+		mmsys->rcdev.of_node = pdev->dev.of_node;
+		ret = devm_reset_controller_register(&pdev->dev, &mmsys->rcdev);
+		if (ret) {
+			dev_err(&pdev->dev, "Couldn't register mmsys reset controller: %d\n", ret);
+			return ret;
+		}
 	}
 
-	mmsys->data = of_device_get_match_data(&pdev->dev);
-
 #if IS_REACHABLE(CONFIG_MTK_CMDQ)
 	ret = cmdq_dev_get_client_reg(dev, &mmsys->cmdq_base, 0);
 	if (ret)
diff --git a/drivers/soc/mediatek/mtk-mmsys.h b/drivers/soc/mediatek/mtk-mmsys.h
index 77f37f8c715b..e19994749adb 100644
--- a/drivers/soc/mediatek/mtk-mmsys.h
+++ b/drivers/soc/mediatek/mtk-mmsys.h
@@ -91,6 +91,7 @@ struct mtk_mmsys_driver_data {
 	const struct mtk_mmsys_routes *routes;
 	const unsigned int num_routes;
 	const u16 sw0_rst_offset;
+	const u32 num_resets;
 };
 
 /*