[PATCH] mfd: rk8xx: Add support for rk806 on i2c bus

From: Detlev Casanova
Date: Fri Aug 02 2024 - 09:46:45 EST


The ArmSoM Sige 5 board connects the rk806 PMIC on an i2c bus.

Signed-off-by: Detlev Casanova <detlev.casanova@xxxxxxxxxxxxx>
---
drivers/mfd/rk8xx-i2c.c | 25 +++++++++++++++++++++++++
1 file changed, 25 insertions(+)

diff --git a/drivers/mfd/rk8xx-i2c.c b/drivers/mfd/rk8xx-i2c.c
index 69a6b297d7238..37287b06dab0d 100644
--- a/drivers/mfd/rk8xx-i2c.c
+++ b/drivers/mfd/rk8xx-i2c.c
@@ -21,6 +21,17 @@ struct rk8xx_i2c_platform_data {
int variant;
};

+static bool rk806_is_volatile_reg(struct device *dev, unsigned int reg)
+{
+ switch (reg) {
+ case RK806_POWER_EN0 ... RK806_POWER_EN5:
+ case RK806_DVS_START_CTRL ... RK806_INT_MSK1:
+ return true;
+ }
+
+ return false;
+}
+
static bool rk808_is_volatile_reg(struct device *dev, unsigned int reg)
{
/*
@@ -121,6 +132,14 @@ static const struct regmap_config rk805_regmap_config = {
.volatile_reg = rk808_is_volatile_reg,
};

+static const struct regmap_config rk806_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+ .max_register = RK806_BUCK_RSERVE_REG5,
+ .cache_type = REGCACHE_MAPLE,
+ .volatile_reg = rk806_is_volatile_reg,
+};
+
static const struct regmap_config rk808_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
@@ -150,6 +169,11 @@ static const struct rk8xx_i2c_platform_data rk805_data = {
.variant = RK805_ID,
};

+static const struct rk8xx_i2c_platform_data rk806_data = {
+ .regmap_cfg = &rk806_regmap_config,
+ .variant = RK806_ID,
+};
+
static const struct rk8xx_i2c_platform_data rk808_data = {
.regmap_cfg = &rk808_regmap_config,
.variant = RK808_ID,
@@ -201,6 +225,7 @@ static SIMPLE_DEV_PM_OPS(rk8xx_i2c_pm_ops, rk8xx_suspend, rk8xx_resume);

static const struct of_device_id rk8xx_i2c_of_match[] = {
{ .compatible = "rockchip,rk805", .data = &rk805_data },
+ { .compatible = "rockchip,rk806", .data = &rk806_data },
{ .compatible = "rockchip,rk808", .data = &rk808_data },
{ .compatible = "rockchip,rk809", .data = &rk809_data },
{ .compatible = "rockchip,rk816", .data = &rk816_data },
--
2.46.0