From f43b6d4714ee7818cac5c8ef099ab461e12cce83 Mon Sep 17 00:00:00 2001
From: Jonas Karlman
Date: Sun, 21 Apr 2024 20:09:03 +0000
Subject: rockchip: io-domain: Add support for RK3328

Port the RK3328 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.

Enable by default on all RK3328 boards, skip rk3328-evb because this
target is typically also used on miscellaneous boards and boxes not
fully supported by U-Boot.

Signed-off-by: Jonas Karlman <jonas@kwiboo.se>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
---
 drivers/misc/Kconfig              |  2 +-
 drivers/misc/rockchip-io-domain.c | 38 ++++++++++++++++++++++++++++++++++++++
 2 files changed, 39 insertions(+), 1 deletion(-)

(limited to 'drivers')

diff --git a/drivers/misc/Kconfig b/drivers/misc/Kconfig
index 6b06888454f..6009d55f400 100644
--- a/drivers/misc/Kconfig
+++ b/drivers/misc/Kconfig
@@ -104,7 +104,7 @@ config ROCKCHIP_OTP
 config ROCKCHIP_IODOMAIN
 	bool "Rockchip IO-domain driver support"
 	depends on DM_REGULATOR && ARCH_ROCKCHIP
-	default y if ROCKCHIP_RK3568
+	default y if ROCKCHIP_RK3328 || ROCKCHIP_RK3568
 	help
 	  Enable support for IO-domains in Rockchip SoCs. It is necessary
 	  for the IO-domain setting of the SoC to match the voltage supplied
diff --git a/drivers/misc/rockchip-io-domain.c b/drivers/misc/rockchip-io-domain.c
index 0ffea32ef07..04d4d07c412 100644
--- a/drivers/misc/rockchip-io-domain.c
+++ b/drivers/misc/rockchip-io-domain.c
@@ -27,6 +27,10 @@
 #define MAX_VOLTAGE_1_8		1980000
 #define MAX_VOLTAGE_3_3		3600000
 
+#define RK3328_SOC_CON4			0x410
+#define RK3328_SOC_CON4_VCCIO2		BIT(7)
+#define RK3328_SOC_VCCIO2_SUPPLY_NUM	1
+
 #define RK3399_PMUGRF_CON0		0x180
 #define RK3399_PMUGRF_CON0_VSEL		BIT(8)
 #define RK3399_PMUGRF_VSEL_SUPPLY_NUM	9
@@ -95,6 +99,22 @@ static int rockchip_iodomain_write(struct regmap *grf, uint offset, int idx, int
 	return regmap_write(grf, offset, val);
 }
 
+static int rk3328_iodomain_write(struct regmap *grf, uint offset, int idx, int uV)
+{
+	int ret = rockchip_iodomain_write(grf, offset, idx, uV);
+
+	if (!ret && idx == RK3328_SOC_VCCIO2_SUPPLY_NUM) {
+		/*
+		 * set vccio2 iodomain to also use this framework
+		 * instead of a special gpio.
+		 */
+		u32 val = RK3328_SOC_CON4_VCCIO2 | (RK3328_SOC_CON4_VCCIO2 << 16);
+		ret = regmap_write(grf, RK3328_SOC_CON4, val);
+	}
+
+	return ret;
+}
+
 static int rk3399_pmu_iodomain_write(struct regmap *grf, uint offset, int idx, int uV)
 {
 	int ret = rockchip_iodomain_write(grf, offset, idx, uV);
@@ -111,6 +131,20 @@ static int rk3399_pmu_iodomain_write(struct regmap *grf, uint offset, int idx, i
 	return ret;
 }
 
+static const struct rockchip_iodomain_soc_data soc_data_rk3328 = {
+	.grf_offset = 0x410,
+	.supply_names = {
+		"vccio1-supply",
+		"vccio2-supply",
+		"vccio3-supply",
+		"vccio4-supply",
+		"vccio5-supply",
+		"vccio6-supply",
+		"pmuio-supply",
+	},
+	.write = rk3328_iodomain_write,
+};
+
 static const struct rockchip_iodomain_soc_data soc_data_rk3399 = {
 	.grf_offset = 0xe640,
 	.supply_names = {
@@ -156,6 +190,10 @@ static const struct rockchip_iodomain_soc_data soc_data_rk3568_pmu = {
 };
 
 static const struct udevice_id rockchip_iodomain_ids[] = {
+	{
+		.compatible = "rockchip,rk3328-io-voltage-domain",
+		.data = (ulong)&soc_data_rk3328,
+	},
 	{
 		.compatible = "rockchip,rk3399-io-voltage-domain",
 		.data = (ulong)&soc_data_rk3399,
-- 
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