[PATCH v2 05/12] rockchip: io-domain: Add support for RK3399

[Jonas Karlman]

Port the RK3399 part of the Rockchip IO-domain driver from linux.

This differs from linux version in that pmu io iodomain bit is enabled
in the write ops instead of in an init ops as in linux, this way we can
avoid keeping a full state of all supply that have been configured.

Signed-off-by: Jonas Karlman <jonas at kwiboo.se>
Reviewed-by: Quentin Schulz <quentin.schulz at theobroma-systems.com>
Reviewed-by: Kever Yang <kever.yang at rock-chips.com>
---
v2:
- Collect r-b tags
---
 drivers/misc/rockchip-io-domain.c | 79 +++++++++++++++++++++++++++++--
 1 file changed, 75 insertions(+), 4 deletions(-)

diff --git a/drivers/misc/rockchip-io-domain.c b/drivers/misc/rockchip-io-domain.c
index 3f6227f993f9..0ffea32ef07f 100644
--- a/drivers/misc/rockchip-io-domain.c
+++ b/drivers/misc/rockchip-io-domain.c
@@ -5,7 +5,6 @@
  * Ported from linux drivers/soc/rockchip/io-domain.c
  */
 
-#include <common.h>
 #include <dm.h>
 #include <dm/device_compat.h>
 #include <regmap.h>
@@ -28,6 +27,10 @@
 #define MAX_VOLTAGE_1_8		1980000
 #define MAX_VOLTAGE_3_3		3600000
 
+#define RK3399_PMUGRF_CON0		0x180
+#define RK3399_PMUGRF_CON0_VSEL		BIT(8)
+#define RK3399_PMUGRF_VSEL_SUPPLY_NUM	9
+
 #define RK3568_PMU_GRF_IO_VSEL0		0x0140
 #define RK3568_PMU_GRF_IO_VSEL1		0x0144
 #define RK3568_PMU_GRF_IO_VSEL2		0x0148
@@ -35,10 +38,10 @@
 struct rockchip_iodomain_soc_data {
 	int grf_offset;
 	const char *supply_names[MAX_SUPPLIES];
-	int (*write)(struct regmap *grf, int idx, int uV);
+	int (*write)(struct regmap *grf, uint offset, int idx, int uV);
 };
 
-static int rk3568_iodomain_write(struct regmap *grf, int idx, int uV)
+static int rk3568_iodomain_write(struct regmap *grf, uint offset, int idx, int uV)
 {
 	u32 is_3v3 = uV > MAX_VOLTAGE_1_8;
 	u32 val0, val1;
@@ -78,6 +81,64 @@ static int rk3568_iodomain_write(struct regmap *grf, int idx, int uV)
 	return 0;
 }
 
+static int rockchip_iodomain_write(struct regmap *grf, uint offset, int idx, int uV)
+{
+	u32 val;
+
+	/* set value bit */
+	val = (uV > MAX_VOLTAGE_1_8) ? 0 : 1;
+	val <<= idx;
+
+	/* apply hiword-mask */
+	val |= (BIT(idx) << 16);
+
+	return regmap_write(grf, offset, val);
+}
+
+static int rk3399_pmu_iodomain_write(struct regmap *grf, uint offset, int idx, int uV)
+{
+	int ret = rockchip_iodomain_write(grf, offset, idx, uV);
+
+	if (!ret && idx == RK3399_PMUGRF_VSEL_SUPPLY_NUM) {
+		/*
+		 * set pmu io iodomain to also use this framework
+		 * instead of a special gpio.
+		 */
+		u32 val = RK3399_PMUGRF_CON0_VSEL | (RK3399_PMUGRF_CON0_VSEL << 16);
+		ret = regmap_write(grf, RK3399_PMUGRF_CON0, val);
+	}
+
+	return ret;
+}
+
+static const struct rockchip_iodomain_soc_data soc_data_rk3399 = {
+	.grf_offset = 0xe640,
+	.supply_names = {
+		"bt656-supply",		/* APIO2_VDD */
+		"audio-supply",		/* APIO5_VDD */
+		"sdmmc-supply",		/* SDMMC0_VDD */
+		"gpio1830-supply",	/* APIO4_VDD */
+	},
+	.write = rockchip_iodomain_write,
+};
+
+static const struct rockchip_iodomain_soc_data soc_data_rk3399_pmu = {
+	.grf_offset = 0x180,
+	.supply_names = {
+		NULL,
+		NULL,
+		NULL,
+		NULL,
+		NULL,
+		NULL,
+		NULL,
+		NULL,
+		NULL,
+		"pmu1830-supply",	/* PMUIO2_VDD */
+	},
+	.write = rk3399_pmu_iodomain_write,
+};
+
 static const struct rockchip_iodomain_soc_data soc_data_rk3568_pmu = {
 	.grf_offset = 0x140,
 	.supply_names = {
@@ -95,6 +156,14 @@ static const struct rockchip_iodomain_soc_data soc_data_rk3568_pmu = {
 };
 
 static const struct udevice_id rockchip_iodomain_ids[] = {
+	{
+		.compatible = "rockchip,rk3399-io-voltage-domain",
+		.data = (ulong)&soc_data_rk3399,
+	},
+	{
+		.compatible = "rockchip,rk3399-pmu-io-voltage-domain",
+		.data = (ulong)&soc_data_rk3399_pmu,
+	},
 	{
 		.compatible = "rockchip,rk3568-pmu-io-voltage-domain",
 		.data = (ulong)&soc_data_rk3568_pmu,
@@ -152,7 +221,9 @@ static int rockchip_iodomain_probe(struct udevice *dev)
 			continue;
 		}
 
-		soc_data->write(grf, i, uV);
+		ret = soc_data->write(grf, soc_data->grf_offset, i, uV);
+		if (ret)
+			dev_err(dev, "%s: Couldn't write to GRF\n", supply_name);
 	}
 
 	return 0;
-- 
2.43.2