soc: imx: gpcv2: add support for i.MX8MN power domains

This adds support for the power domains founds on i.MX8MN. The Nano
has fewer domains than the Mini, and the access to some of these domains
is different than that of the Mini, the Mini power domains cannot be
reused.

Signed-off-by: Adam Ford <aford173@gmail.com>
Acked-by: Krzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

drivers/soc/imx/gpcv2.c

@@ -21,6 +21,7 @@
 #include <dt-bindings/power/imx7-power.h>
 #include <dt-bindings/power/imx8mq-power.h>
 #include <dt-bindings/power/imx8mm-power.h>
+#include <dt-bindings/power/imx8mn-power.h>
 
 #include <linux/regmap.h>
 #include <linux/mfd/syscon.h>
@@ -62,6 +63,12 @@
 #define IMX8MM_PCIE_A53_DOMAIN			BIT(3)
 #define IMX8MM_MIPI_A53_DOMAIN			BIT(2)
 
+#define IMX8MN_DISPMIX_A53_DOMAIN		BIT(12)
+#define IMX8MN_GPUMIX_A53_DOMAIN		BIT(9)
+#define IMX8MN_DDR1_A53_DOMAIN		BIT(7)
+#define IMX8MN_OTG1_A53_DOMAIN		BIT(4)
+#define IMX8MN_MIPI_A53_DOMAIN		BIT(2)
+
 #define GPC_PU_PGC_SW_PUP_REQ		0x0f8
 #define GPC_PU_PGC_SW_PDN_REQ		0x104
 
@@ -98,6 +105,12 @@
 #define IMX8MM_PCIE_SW_Pxx_REQ			BIT(1)
 #define IMX8MM_MIPI_SW_Pxx_REQ			BIT(0)
 
+#define IMX8MN_DISPMIX_SW_Pxx_REQ		BIT(10)
+#define IMX8MN_GPUMIX_SW_Pxx_REQ		BIT(7)
+#define IMX8MN_DDR1_SW_Pxx_REQ		BIT(5)
+#define IMX8MN_OTG1_SW_Pxx_REQ		BIT(2)
+#define IMX8MN_MIPI_SW_Pxx_REQ		BIT(0)
+
 #define GPC_M4_PU_PDN_FLG		0x1bc
 
 #define GPC_PU_PWRHSK			0x1fc
@@ -120,6 +133,14 @@
 #define IMX8MM_VPUMIX_HSK_PWRDNREQN		BIT(8)
 #define IMX8MM_DISPMIX_HSK_PWRDNREQN		BIT(7)
 #define IMX8MM_HSIO_HSK_PWRDNREQN		(BIT(5) | BIT(6))
+
+#define IMX8MN_GPUMIX_HSK_PWRDNACKN		(BIT(29) | BIT(27))
+#define IMX8MN_DISPMIX_HSK_PWRDNACKN		BIT(25)
+#define IMX8MN_HSIO_HSK_PWRDNACKN		BIT(23)
+#define IMX8MN_GPUMIX_HSK_PWRDNREQN		(BIT(11) | BIT(9))
+#define IMX8MN_DISPMIX_HSK_PWRDNREQN		BIT(7)
+#define IMX8MN_HSIO_HSK_PWRDNREQN		BIT(5)
+
 /*
  * The PGC offset values in Reference Manual
  * (Rev. 1, 01/2018 and the older ones) GPC chapter's
@@ -156,6 +177,12 @@
 #define IMX8MM_PGC_VPUG2		28
 #define IMX8MM_PGC_VPUH1		29
 
+#define IMX8MN_PGC_MIPI		16
+#define IMX8MN_PGC_OTG1		18
+#define IMX8MN_PGC_DDR1		21
+#define IMX8MN_PGC_GPUMIX		23
+#define IMX8MN_PGC_DISPMIX		26
+
 #define GPC_PGC_CTRL(n)			(0x800 + (n) * 0x40)
 #define GPC_PGC_SR(n)			(GPC_PGC_CTRL(n) + 0xc)
 
@@ -777,6 +804,70 @@ static const struct imx_pgc_domain_data imx8mm_pgc_domain_data = {
 	.reg_access_table = &imx8mm_access_table,
 };
 
+static const struct imx_pgc_domain imx8mn_pgc_domains[] = {
+	[IMX8MN_POWER_DOMAIN_HSIOMIX] = {
+		.genpd = {
+			.name = "hsiomix",
+		},
+		.bits  = {
+			.pxx = 0, /* no power sequence control */
+			.map = 0, /* no power sequence control */
+			.hskreq = IMX8MN_HSIO_HSK_PWRDNREQN,
+			.hskack = IMX8MN_HSIO_HSK_PWRDNACKN,
+		},
+	},
+
+	[IMX8MN_POWER_DOMAIN_OTG1] = {
+		.genpd = {
+			.name = "usb-otg1",
+		},
+		.bits  = {
+			.pxx = IMX8MN_OTG1_SW_Pxx_REQ,
+			.map = IMX8MN_OTG1_A53_DOMAIN,
+		},
+		.pgc   = IMX8MN_PGC_OTG1,
+	},
+
+	[IMX8MN_POWER_DOMAIN_GPUMIX] = {
+		.genpd = {
+			.name = "gpumix",
+		},
+		.bits  = {
+			.pxx = IMX8MN_GPUMIX_SW_Pxx_REQ,
+			.map = IMX8MN_GPUMIX_A53_DOMAIN,
+			.hskreq = IMX8MN_GPUMIX_HSK_PWRDNREQN,
+			.hskack = IMX8MN_GPUMIX_HSK_PWRDNACKN,
+		},
+		.pgc   = IMX8MN_PGC_GPUMIX,
+	},
+};
+
+static const struct regmap_range imx8mn_yes_ranges[] = {
+	regmap_reg_range(GPC_LPCR_A_CORE_BSC,
+			 GPC_PU_PWRHSK),
+	regmap_reg_range(GPC_PGC_CTRL(IMX8MN_PGC_MIPI),
+			 GPC_PGC_SR(IMX8MN_PGC_MIPI)),
+	regmap_reg_range(GPC_PGC_CTRL(IMX8MN_PGC_OTG1),
+			 GPC_PGC_SR(IMX8MN_PGC_OTG1)),
+	regmap_reg_range(GPC_PGC_CTRL(IMX8MN_PGC_DDR1),
+			 GPC_PGC_SR(IMX8MN_PGC_DDR1)),
+	regmap_reg_range(GPC_PGC_CTRL(IMX8MN_PGC_GPUMIX),
+			 GPC_PGC_SR(IMX8MN_PGC_GPUMIX)),
+	regmap_reg_range(GPC_PGC_CTRL(IMX8MN_PGC_DISPMIX),
+			 GPC_PGC_SR(IMX8MN_PGC_DISPMIX)),
+};
+
+static const struct regmap_access_table imx8mn_access_table = {
+	.yes_ranges	= imx8mn_yes_ranges,
+	.n_yes_ranges	= ARRAY_SIZE(imx8mn_yes_ranges),
+};
+
+static const struct imx_pgc_domain_data imx8mn_pgc_domain_data = {
+	.domains = imx8mn_pgc_domains,
+	.domains_num = ARRAY_SIZE(imx8mn_pgc_domains),
+	.reg_access_table = &imx8mn_access_table,
+};
+
 static int imx_pgc_domain_probe(struct platform_device *pdev)
 {
 	struct imx_pgc_domain *domain = pdev->dev.platform_data;
@@ -964,6 +1055,7 @@ static int imx_gpcv2_probe(struct platform_device *pdev)
 static const struct of_device_id imx_gpcv2_dt_ids[] = {
 	{ .compatible = "fsl,imx7d-gpc", .data = &imx7_pgc_domain_data, },
 	{ .compatible = "fsl,imx8mm-gpc", .data = &imx8mm_pgc_domain_data, },
+	{ .compatible = "fsl,imx8mn-gpc", .data = &imx8mn_pgc_domain_data, },
 	{ .compatible = "fsl,imx8mq-gpc", .data = &imx8m_pgc_domain_data, },
 	{ }
 };