remoteproc: mediatek: Extract SCP common registers

This is the 1st preliminary steps for probing multi-core SCP.
The registers of config and l1tcm are common on single-core SCP
and multi-core SCP. Extract these registers out to reduce duplicated
fields in mtk_scp when multiple SCP instances are created.

Signed-off-by: Tinghan Shen <tinghan.shen@mediatek.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Tested-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://lore.kernel.org/r/20230901080935.14571-6-tinghan.shen@mediatek.com
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>

3 files changed, 96 insertions, 85 deletions

diff --git a/drivers/remoteproc/mtk_common.h b/drivers/remoteproc/mtk_common.h
index c0905aec3b4b..b04d71277c1f 100644
--- a/drivers/remoteproc/mtk_common.h
+++ b/drivers/remoteproc/mtk_common.h
@@ -100,17 +100,20 @@ struct mtk_scp_of_data {
 	size_t ipi_buf_offset;
 };
 
+struct mtk_scp_of_cluster {
+	void __iomem *reg_base;
+	void __iomem *l1tcm_base;
+	size_t l1tcm_size;
+	phys_addr_t l1tcm_phys;
+};
+
 struct mtk_scp {
 	struct device *dev;
 	struct rproc *rproc;
 	struct clk *clk;
-	void __iomem *reg_base;
 	void __iomem *sram_base;
 	size_t sram_size;
 	phys_addr_t sram_phys;
-	void __iomem *l1tcm_base;
-	size_t l1tcm_size;
-	phys_addr_t l1tcm_phys;
 
 	const struct mtk_scp_of_data *data;
 
@@ -128,6 +131,8 @@ struct mtk_scp {
 	size_t dram_size;
 
 	struct rproc_subdev *rpmsg_subdev;
+
+	struct mtk_scp_of_cluster *cluster;
 };
 
 /**
diff --git a/drivers/remoteproc/mtk_scp.c b/drivers/remoteproc/mtk_scp.c
index 48e759c2d486..f88e60e4bc21 100644
--- a/drivers/remoteproc/mtk_scp.c
+++ b/drivers/remoteproc/mtk_scp.c
@@ -152,45 +152,45 @@ static void mt8183_scp_reset_assert(struct mtk_scp *scp)
 {
 	u32 val;
 
-	val = readl(scp->reg_base + MT8183_SW_RSTN);
+	val = readl(scp->cluster->reg_base + MT8183_SW_RSTN);
 	val &= ~MT8183_SW_RSTN_BIT;
-	writel(val, scp->reg_base + MT8183_SW_RSTN);
+	writel(val, scp->cluster->reg_base + MT8183_SW_RSTN);
 }
 
 static void mt8183_scp_reset_deassert(struct mtk_scp *scp)
 {
 	u32 val;
 
-	val = readl(scp->reg_base + MT8183_SW_RSTN);
+	val = readl(scp->cluster->reg_base + MT8183_SW_RSTN);
 	val |= MT8183_SW_RSTN_BIT;
-	writel(val, scp->reg_base + MT8183_SW_RSTN);
+	writel(val, scp->cluster->reg_base + MT8183_SW_RSTN);
 }
 
 static void mt8192_scp_reset_assert(struct mtk_scp *scp)
 {
-	writel(1, scp->reg_base + MT8192_CORE0_SW_RSTN_SET);
+	writel(1, scp->cluster->reg_base + MT8192_CORE0_SW_RSTN_SET);
 }
 
 static void mt8192_scp_reset_deassert(struct mtk_scp *scp)
 {
-	writel(1, scp->reg_base + MT8192_CORE0_SW_RSTN_CLR);
+	writel(1, scp->cluster->reg_base + MT8192_CORE0_SW_RSTN_CLR);
 }
 
 static void mt8195_scp_c1_reset_assert(struct mtk_scp *scp)
 {
-	writel(1, scp->reg_base + MT8195_CORE1_SW_RSTN_SET);
+	writel(1, scp->cluster->reg_base + MT8195_CORE1_SW_RSTN_SET);
 }
 
 static void mt8195_scp_c1_reset_deassert(struct mtk_scp *scp)
 {
-	writel(1, scp->reg_base + MT8195_CORE1_SW_RSTN_CLR);
+	writel(1, scp->cluster->reg_base + MT8195_CORE1_SW_RSTN_CLR);
 }
 
 static void mt8183_scp_irq_handler(struct mtk_scp *scp)
 {
 	u32 scp_to_host;
 
-	scp_to_host = readl(scp->reg_base + MT8183_SCP_TO_HOST);
+	scp_to_host = readl(scp->cluster->reg_base + MT8183_SCP_TO_HOST);
 	if (scp_to_host & MT8183_SCP_IPC_INT_BIT)
 		scp_ipi_handler(scp);
 	else
@@ -198,14 +198,14 @@ static void mt8183_scp_irq_handler(struct mtk_scp *scp)
 
 	/* SCP won't send another interrupt until we set SCP_TO_HOST to 0. */
 	writel(MT8183_SCP_IPC_INT_BIT | MT8183_SCP_WDT_INT_BIT,
-	       scp->reg_base + MT8183_SCP_TO_HOST);
+	       scp->cluster->reg_base + MT8183_SCP_TO_HOST);
 }
 
 static void mt8192_scp_irq_handler(struct mtk_scp *scp)
 {
 	u32 scp_to_host;
 
-	scp_to_host = readl(scp->reg_base + MT8192_SCP2APMCU_IPC_SET);
+	scp_to_host = readl(scp->cluster->reg_base + MT8192_SCP2APMCU_IPC_SET);
 
 	if (scp_to_host & MT8192_SCP_IPC_INT_BIT) {
 		scp_ipi_handler(scp);
@@ -215,10 +215,10 @@ static void mt8192_scp_irq_handler(struct mtk_scp *scp)
 		 * MT8192_SCP2APMCU_IPC.
 		 */
 		writel(MT8192_SCP_IPC_INT_BIT,
-		       scp->reg_base + MT8192_SCP2APMCU_IPC_CLR);
+		       scp->cluster->reg_base + MT8192_SCP2APMCU_IPC_CLR);
 	} else {
 		scp_wdt_handler(scp, scp_to_host);
-		writel(1, scp->reg_base + MT8192_CORE0_WDT_IRQ);
+		writel(1, scp->cluster->reg_base + MT8192_CORE0_WDT_IRQ);
 	}
 }
 
@@ -226,12 +226,12 @@ static void mt8195_scp_c1_irq_handler(struct mtk_scp *scp)
 {
 	u32 scp_to_host;
 
-	scp_to_host = readl(scp->reg_base + MT8195_SSHUB2APMCU_IPC_SET);
+	scp_to_host = readl(scp->cluster->reg_base + MT8195_SSHUB2APMCU_IPC_SET);
 
 	if (scp_to_host & MT8192_SCP_IPC_INT_BIT)
 		scp_ipi_handler(scp);
 
-	writel(scp_to_host, scp->reg_base + MT8195_SSHUB2APMCU_IPC_CLR);
+	writel(scp_to_host, scp->cluster->reg_base + MT8195_SSHUB2APMCU_IPC_CLR);
 }
 
 static irqreturn_t scp_irq_handler(int irq, void *priv)
@@ -363,26 +363,26 @@ static int mt8195_scp_clk_get(struct mtk_scp *scp)
 static int mt8183_scp_before_load(struct mtk_scp *scp)
 {
 	/* Clear SCP to host interrupt */
-	writel(MT8183_SCP_IPC_INT_BIT, scp->reg_base + MT8183_SCP_TO_HOST);
+	writel(MT8183_SCP_IPC_INT_BIT, scp->cluster->reg_base + MT8183_SCP_TO_HOST);
 
 	/* Reset clocks before loading FW */
-	writel(0x0, scp->reg_base + MT8183_SCP_CLK_SW_SEL);
-	writel(0x0, scp->reg_base + MT8183_SCP_CLK_DIV_SEL);
+	writel(0x0, scp->cluster->reg_base + MT8183_SCP_CLK_SW_SEL);
+	writel(0x0, scp->cluster->reg_base + MT8183_SCP_CLK_DIV_SEL);
 
 	/* Initialize TCM before loading FW. */
-	writel(0x0, scp->reg_base + MT8183_SCP_L1_SRAM_PD);
-	writel(0x0, scp->reg_base + MT8183_SCP_TCM_TAIL_SRAM_PD);
+	writel(0x0, scp->cluster->reg_base + MT8183_SCP_L1_SRAM_PD);
+	writel(0x0, scp->cluster->reg_base + MT8183_SCP_TCM_TAIL_SRAM_PD);
 
 	/* Turn on the power of SCP's SRAM before using it. */
-	writel(0x0, scp->reg_base + MT8183_SCP_SRAM_PDN);
+	writel(0x0, scp->cluster->reg_base + MT8183_SCP_SRAM_PDN);
 
 	/*
 	 * Set I-cache and D-cache size before loading SCP FW.
 	 * SCP SRAM logical address may change when cache size setting differs.
 	 */
 	writel(MT8183_SCP_CACHE_CON_WAYEN | MT8183_SCP_CACHESIZE_8KB,
-	       scp->reg_base + MT8183_SCP_CACHE_CON);
-	writel(MT8183_SCP_CACHESIZE_8KB, scp->reg_base + MT8183_SCP_DCACHE_CON);
+	       scp->cluster->reg_base + MT8183_SCP_CACHE_CON);
+	writel(MT8183_SCP_CACHESIZE_8KB, scp->cluster->reg_base + MT8183_SCP_DCACHE_CON);
 
 	return 0;
 }
@@ -408,28 +408,28 @@ static void scp_sram_power_off(void __iomem *addr, u32 reserved_mask)
 static int mt8186_scp_before_load(struct mtk_scp *scp)
 {
 	/* Clear SCP to host interrupt */
-	writel(MT8183_SCP_IPC_INT_BIT, scp->reg_base + MT8183_SCP_TO_HOST);
+	writel(MT8183_SCP_IPC_INT_BIT, scp->cluster->reg_base + MT8183_SCP_TO_HOST);
 
 	/* Reset clocks before loading FW */
-	writel(0x0, scp->reg_base + MT8183_SCP_CLK_SW_SEL);
-	writel(0x0, scp->reg_base + MT8183_SCP_CLK_DIV_SEL);
+	writel(0x0, scp->cluster->reg_base + MT8183_SCP_CLK_SW_SEL);
+	writel(0x0, scp->cluster->reg_base + MT8183_SCP_CLK_DIV_SEL);
 
 	/* Turn on the power of SCP's SRAM before using it. Enable 1 block per time*/
-	scp_sram_power_on(scp->reg_base + MT8183_SCP_SRAM_PDN, 0);
+	scp_sram_power_on(scp->cluster->reg_base + MT8183_SCP_SRAM_PDN, 0);
 
 	/* Initialize TCM before loading FW. */
-	writel(0x0, scp->reg_base + MT8183_SCP_L1_SRAM_PD);
-	writel(0x0, scp->reg_base + MT8183_SCP_TCM_TAIL_SRAM_PD);
-	writel(0x0, scp->reg_base + MT8186_SCP_L1_SRAM_PD_P1);
-	writel(0x0, scp->reg_base + MT8186_SCP_L1_SRAM_PD_p2);
+	writel(0x0, scp->cluster->reg_base + MT8183_SCP_L1_SRAM_PD);
+	writel(0x0, scp->cluster->reg_base + MT8183_SCP_TCM_TAIL_SRAM_PD);
+	writel(0x0, scp->cluster->reg_base + MT8186_SCP_L1_SRAM_PD_P1);
+	writel(0x0, scp->cluster->reg_base + MT8186_SCP_L1_SRAM_PD_p2);
 
 	/*
 	 * Set I-cache and D-cache size before loading SCP FW.
 	 * SCP SRAM logical address may change when cache size setting differs.
 	 */
 	writel(MT8183_SCP_CACHE_CON_WAYEN | MT8183_SCP_CACHESIZE_8KB,
-	       scp->reg_base + MT8183_SCP_CACHE_CON);
-	writel(MT8183_SCP_CACHESIZE_8KB, scp->reg_base + MT8183_SCP_DCACHE_CON);
+	       scp->cluster->reg_base + MT8183_SCP_CACHE_CON);
+	writel(MT8183_SCP_CACHESIZE_8KB, scp->cluster->reg_base + MT8183_SCP_DCACHE_CON);
 
 	return 0;
 }
@@ -437,19 +437,19 @@ static int mt8186_scp_before_load(struct mtk_scp *scp)
 static int mt8192_scp_before_load(struct mtk_scp *scp)
 {
 	/* clear SPM interrupt, SCP2SPM_IPC_CLR */
-	writel(0xff, scp->reg_base + MT8192_SCP2SPM_IPC_CLR);
+	writel(0xff, scp->cluster->reg_base + MT8192_SCP2SPM_IPC_CLR);
 
-	writel(1, scp->reg_base + MT8192_CORE0_SW_RSTN_SET);
+	writel(1, scp->cluster->reg_base + MT8192_CORE0_SW_RSTN_SET);
 
 	/* enable SRAM clock */
-	scp_sram_power_on(scp->reg_base + MT8192_L2TCM_SRAM_PD_0, 0);
-	scp_sram_power_on(scp->reg_base + MT8192_L2TCM_SRAM_PD_1, 0);
-	scp_sram_power_on(scp->reg_base + MT8192_L2TCM_SRAM_PD_2, 0);
-	scp_sram_power_on(scp->reg_base + MT8192_L1TCM_SRAM_PDN, 0);
-	scp_sram_power_on(scp->reg_base + MT8192_CPU0_SRAM_PD, 0);
+	scp_sram_power_on(scp->cluster->reg_base + MT8192_L2TCM_SRAM_PD_0, 0);
+	scp_sram_power_on(scp->cluster->reg_base + MT8192_L2TCM_SRAM_PD_1, 0);
+	scp_sram_power_on(scp->cluster->reg_base + MT8192_L2TCM_SRAM_PD_2, 0);
+	scp_sram_power_on(scp->cluster->reg_base + MT8192_L1TCM_SRAM_PDN, 0);
+	scp_sram_power_on(scp->cluster->reg_base + MT8192_CPU0_SRAM_PD, 0);
 
 	/* enable MPU for all memory regions */
-	writel(0xff, scp->reg_base + MT8192_CORE0_MEM_ATT_PREDEF);
+	writel(0xff, scp->cluster->reg_base + MT8192_CORE0_MEM_ATT_PREDEF);
 
 	return 0;
 }
@@ -457,20 +457,20 @@ static int mt8192_scp_before_load(struct mtk_scp *scp)
 static int mt8195_scp_before_load(struct mtk_scp *scp)
 {
 	/* clear SPM interrupt, SCP2SPM_IPC_CLR */
-	writel(0xff, scp->reg_base + MT8192_SCP2SPM_IPC_CLR);
+	writel(0xff, scp->cluster->reg_base + MT8192_SCP2SPM_IPC_CLR);
 
-	writel(1, scp->reg_base + MT8192_CORE0_SW_RSTN_SET);
+	writel(1, scp->cluster->reg_base + MT8192_CORE0_SW_RSTN_SET);
 
 	/* enable SRAM clock */
-	scp_sram_power_on(scp->reg_base + MT8192_L2TCM_SRAM_PD_0, 0);
-	scp_sram_power_on(scp->reg_base + MT8192_L2TCM_SRAM_PD_1, 0);
-	scp_sram_power_on(scp->reg_base + MT8192_L2TCM_SRAM_PD_2, 0);
-	scp_sram_power_on(scp->reg_base + MT8192_L1TCM_SRAM_PDN,
+	scp_sram_power_on(scp->cluster->reg_base + MT8192_L2TCM_SRAM_PD_0, 0);
+	scp_sram_power_on(scp->cluster->reg_base + MT8192_L2TCM_SRAM_PD_1, 0);
+	scp_sram_power_on(scp->cluster->reg_base + MT8192_L2TCM_SRAM_PD_2, 0);
+	scp_sram_power_on(scp->cluster->reg_base + MT8192_L1TCM_SRAM_PDN,
 			  MT8195_L1TCM_SRAM_PDN_RESERVED_RSI_BITS);
-	scp_sram_power_on(scp->reg_base + MT8192_CPU0_SRAM_PD, 0);
+	scp_sram_power_on(scp->cluster->reg_base + MT8192_CPU0_SRAM_PD, 0);
 
 	/* enable MPU for all memory regions */
-	writel(0xff, scp->reg_base + MT8192_CORE0_MEM_ATT_PREDEF);
+	writel(0xff, scp->cluster->reg_base + MT8192_CORE0_MEM_ATT_PREDEF);
 
 	return 0;
 }
@@ -479,10 +479,10 @@ static int mt8195_scp_c1_before_load(struct mtk_scp *scp)
 {
 	scp->data->scp_reset_assert(scp);
 
-	scp_sram_power_on(scp->reg_base + MT8195_CPU1_SRAM_PD, 0);
+	scp_sram_power_on(scp->cluster->reg_base + MT8195_CPU1_SRAM_PD, 0);
 
 	/* enable MPU for all memory regions */
-	writel(0xff, scp->reg_base + MT8195_CORE1_MEM_ATT_PREDEF);
+	writel(0xff, scp->cluster->reg_base + MT8195_CORE1_MEM_ATT_PREDEF);
 
 	return 0;
 }
@@ -601,11 +601,11 @@ static void *mt8192_scp_da_to_va(struct mtk_scp *scp, u64 da, size_t len)
 	}
 
 	/* optional memory region */
-	if (scp->l1tcm_size &&
-	    da >= scp->l1tcm_phys &&
-	    (da + len) <= scp->l1tcm_phys + scp->l1tcm_size) {
-		offset = da - scp->l1tcm_phys;
-		return (void __force *)scp->l1tcm_base + offset;
+	if (scp->cluster->l1tcm_size &&
+	    da >= scp->cluster->l1tcm_phys &&
+	    (da + len) <= scp->cluster->l1tcm_phys + scp->cluster->l1tcm_size) {
+		offset = da - scp->cluster->l1tcm_phys;
+		return (void __force *)scp->cluster->l1tcm_base + offset;
 	}
 
 	/* optional memory region */
@@ -629,43 +629,43 @@ static void *scp_da_to_va(struct rproc *rproc, u64 da, size_t len, bool *is_iome
 static void mt8183_scp_stop(struct mtk_scp *scp)
 {
 	/* Disable SCP watchdog */
-	writel(0, scp->reg_base + MT8183_WDT_CFG);
+	writel(0, scp->cluster->reg_base + MT8183_WDT_CFG);
 }
 
 static void mt8192_scp_stop(struct mtk_scp *scp)
 {
 	/* Disable SRAM clock */
-	scp_sram_power_off(scp->reg_base + MT8192_L2TCM_SRAM_PD_0, 0);
-	scp_sram_power_off(scp->reg_base + MT8192_L2TCM_SRAM_PD_1, 0);
-	scp_sram_power_off(scp->reg_base + MT8192_L2TCM_SRAM_PD_2, 0);
-	scp_sram_power_off(scp->reg_base + MT8192_L1TCM_SRAM_PDN, 0);
-	scp_sram_power_off(scp->reg_base + MT8192_CPU0_SRAM_PD, 0);
+	scp_sram_power_off(scp->cluster->reg_base + MT8192_L2TCM_SRAM_PD_0, 0);
+	scp_sram_power_off(scp->cluster->reg_base + MT8192_L2TCM_SRAM_PD_1, 0);
+	scp_sram_power_off(scp->cluster->reg_base + MT8192_L2TCM_SRAM_PD_2, 0);
+	scp_sram_power_off(scp->cluster->reg_base + MT8192_L1TCM_SRAM_PDN, 0);
+	scp_sram_power_off(scp->cluster->reg_base + MT8192_CPU0_SRAM_PD, 0);
 
 	/* Disable SCP watchdog */
-	writel(0, scp->reg_base + MT8192_CORE0_WDT_CFG);
+	writel(0, scp->cluster->reg_base + MT8192_CORE0_WDT_CFG);
 }
 
 static void mt8195_scp_stop(struct mtk_scp *scp)
 {
 	/* Disable SRAM clock */
-	scp_sram_power_off(scp->reg_base + MT8192_L2TCM_SRAM_PD_0, 0);
-	scp_sram_power_off(scp->reg_base + MT8192_L2TCM_SRAM_PD_1, 0);
-	scp_sram_power_off(scp->reg_base + MT8192_L2TCM_SRAM_PD_2, 0);
-	scp_sram_power_off(scp->reg_base + MT8192_L1TCM_SRAM_PDN,
+	scp_sram_power_off(scp->cluster->reg_base + MT8192_L2TCM_SRAM_PD_0, 0);
+	scp_sram_power_off(scp->cluster->reg_base + MT8192_L2TCM_SRAM_PD_1, 0);
+	scp_sram_power_off(scp->cluster->reg_base + MT8192_L2TCM_SRAM_PD_2, 0);
+	scp_sram_power_off(scp->cluster->reg_base + MT8192_L1TCM_SRAM_PDN,
 			   MT8195_L1TCM_SRAM_PDN_RESERVED_RSI_BITS);
-	scp_sram_power_off(scp->reg_base + MT8192_CPU0_SRAM_PD, 0);
+	scp_sram_power_off(scp->cluster->reg_base + MT8192_CPU0_SRAM_PD, 0);
 
 	/* Disable SCP watchdog */
-	writel(0, scp->reg_base + MT8192_CORE0_WDT_CFG);
+	writel(0, scp->cluster->reg_base + MT8192_CORE0_WDT_CFG);
 }
 
 static void mt8195_scp_c1_stop(struct mtk_scp *scp)
 {
 	/* Power off CPU SRAM */
-	scp_sram_power_off(scp->reg_base + MT8195_CPU1_SRAM_PD, 0);
+	scp_sram_power_off(scp->cluster->reg_base + MT8195_CPU1_SRAM_PD, 0);
 
 	/* Disable SCP watchdog */
-	writel(0, scp->reg_base + MT8195_CORE1_WDT_CFG);
+	writel(0, scp->cluster->reg_base + MT8195_CORE1_WDT_CFG);
 }
 
 static int scp_stop(struct rproc *rproc)
@@ -859,11 +859,16 @@ static int scp_probe(struct platform_device *pdev)
 	struct device *dev = &pdev->dev;
 	struct device_node *np = dev->of_node;
 	struct mtk_scp *scp;
+	struct mtk_scp_of_cluster *scp_cluster;
 	struct rproc *rproc;
 	struct resource *res;
 	const char *fw_name = "scp.img";
 	int ret, i;
 
+	scp_cluster = devm_kzalloc(dev, sizeof(*scp_cluster), GFP_KERNEL);
+	if (!scp_cluster)
+		return -ENOMEM;
+
 	ret = rproc_of_parse_firmware(dev, 0, &fw_name);
 	if (ret < 0 && ret != -EINVAL)
 		return ret;
@@ -876,6 +881,7 @@ static int scp_probe(struct platform_device *pdev)
 	scp->rproc = rproc;
 	scp->dev = dev;
 	scp->data = of_device_get_match_data(dev);
+	scp->cluster = scp_cluster;
 	platform_set_drvdata(pdev, scp);
 
 	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "sram");
@@ -889,20 +895,20 @@ static int scp_probe(struct platform_device *pdev)
 
 	/* l1tcm is an optional memory region */
 	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "l1tcm");
-	scp->l1tcm_base = devm_ioremap_resource(dev, res);
-	if (IS_ERR(scp->l1tcm_base)) {
-		ret = PTR_ERR(scp->l1tcm_base);
+	scp->cluster->l1tcm_base = devm_ioremap_resource(dev, res);
+	if (IS_ERR(scp->cluster->l1tcm_base)) {
+		ret = PTR_ERR(scp->cluster->l1tcm_base);
 		if (ret != -EINVAL) {
 			return dev_err_probe(dev, ret, "Failed to map l1tcm memory\n");
 		}
 	} else {
-		scp->l1tcm_size = resource_size(res);
-		scp->l1tcm_phys = res->start;
+		scp->cluster->l1tcm_size = resource_size(res);
+		scp->cluster->l1tcm_phys = res->start;
 	}
 
-	scp->reg_base = devm_platform_ioremap_resource_byname(pdev, "cfg");
-	if (IS_ERR(scp->reg_base))
-		return dev_err_probe(dev, PTR_ERR(scp->reg_base),
+	scp->cluster->reg_base = devm_platform_ioremap_resource_byname(pdev, "cfg");
+	if (IS_ERR(scp->cluster->reg_base))
+		return dev_err_probe(dev, PTR_ERR(scp->cluster->reg_base),
 				     "Failed to parse and map cfg memory\n");
 
 	ret = scp->data->scp_clk_get(scp);
diff --git a/drivers/remoteproc/mtk_scp_ipi.c b/drivers/remoteproc/mtk_scp_ipi.c
index 9c7c17b9d181..cd0b60106ec2 100644
--- a/drivers/remoteproc/mtk_scp_ipi.c
+++ b/drivers/remoteproc/mtk_scp_ipi.c
@@ -177,7 +177,7 @@ int scp_ipi_send(struct mtk_scp *scp, u32 id, void *buf, unsigned int len,
 	mutex_lock(&scp->send_lock);
 
 	 /* Wait until SCP receives the last command */
-	ret = readl_poll_timeout_atomic(scp->reg_base + scp->data->host_to_scp_reg,
+	ret = readl_poll_timeout_atomic(scp->cluster->reg_base + scp->data->host_to_scp_reg,
 					val, !val, 0, SCP_TIMEOUT_US);
 	if (ret) {
 		dev_err(scp->dev, "%s: IPI timeout!\n", __func__);
@@ -192,7 +192,7 @@ int scp_ipi_send(struct mtk_scp *scp, u32 id, void *buf, unsigned int len,
 	scp->ipi_id_ack[id] = false;
 	/* send the command to SCP */
 	writel(scp->data->host_to_scp_int_bit,
-	       scp->reg_base + scp->data->host_to_scp_reg);
+	       scp->cluster->reg_base + scp->data->host_to_scp_reg);
 
 	if (wait) {
 		/* wait for SCP's ACK */