[PATCHv6 06/11] mfd: rk8xx-i2c: use device_get_match_data

Sebastian Reichel
2023-01-27T18:13:59Z

Simplify the device identification logic by supplying the relevant
information via of_match_data. This also removes the dev_info()
printing the chip version, since that's supplied by the match data
now.

Due to lack of hardware this change is compile-tested only.

Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
---
drivers/mfd/rk8xx-core.c | 2 -
drivers/mfd/rk8xx-i2c.c | 89 +++++++++++++++++-----------------------
2 files changed, 37 insertions(+), 54 deletions(-)

diff --git a/drivers/mfd/rk8xx-core.c b/drivers/mfd/rk8xx-core.c
index c52f5fa1a4da..21c6484a951c 100644
--- a/drivers/mfd/rk8xx-core.c
+++ b/drivers/mfd/rk8xx-core.c
@@ -596,8 +596,6 @@ int rk8xx_probe(struct device *dev, int variant, unsigned int irq, struct regmap
return -EINVAL;
}

- dev_info(dev, "chip id: 0x%x\n", (unsigned int)rk808->variant);
-
if (!irq)
return dev_err_probe(dev, -EINVAL, "No interrupt support, no core IRQ\n");

diff --git a/drivers/mfd/rk8xx-i2c.c b/drivers/mfd/rk8xx-i2c.c
index 6d121b589fec..2822bfa8a04a 100644
--- a/drivers/mfd/rk8xx-i2c.c
+++ b/drivers/mfd/rk8xx-i2c.c
@@ -16,6 +16,11 @@
#include <linux/of.h>
#include <linux/regmap.h>

+struct rk8xx_i2c_platform_data {
+ const struct regmap_config *regmap_cfg;
+ int variant;
+};
+
static bool rk808_is_volatile_reg(struct device *dev, unsigned int reg)
{
/*
@@ -103,66 +108,46 @@ static const struct regmap_config rk817_regmap_config = {
.volatile_reg = rk817_is_volatile_reg,
};

-static int rk8xx_i2c_get_variant(struct i2c_client *client)
-{
- u8 pmic_id_msb, pmic_id_lsb;
- int msb, lsb;
-
- if (of_device_is_compatible(client->dev.of_node, "rockchip,rk817") ||
- of_device_is_compatible(client->dev.of_node, "rockchip,rk809")) {
- pmic_id_msb = RK817_ID_MSB;
- pmic_id_lsb = RK817_ID_LSB;
- } else {
- pmic_id_msb = RK808_ID_MSB;
- pmic_id_lsb = RK808_ID_LSB;
- }
+static const struct rk8xx_i2c_platform_data rk805_data = {
+ .regmap_cfg = &rk805_regmap_config,
+ .variant = RK805_ID,
+};
+
+static const struct rk8xx_i2c_platform_data rk808_data = {
+ .regmap_cfg = &rk808_regmap_config,
+ .variant = RK808_ID,
+};

- /* Read chip variant */
- msb = i2c_smbus_read_byte_data(client, pmic_id_msb);
- if (msb < 0)
- return dev_err_probe(&client->dev, msb, "failed to read the chip id MSB\n");
+static const struct rk8xx_i2c_platform_data rk809_data = {
+ .regmap_cfg = &rk817_regmap_config,
+ .variant = RK809_ID,
+};

- lsb = i2c_smbus_read_byte_data(client, pmic_id_lsb);
- if (lsb < 0)
- return dev_err_probe(&client->dev, lsb, "failed to read the chip id LSB\n");
+static const struct rk8xx_i2c_platform_data rk817_data = {
+ .regmap_cfg = &rk817_regmap_config,
+ .variant = RK817_ID,
+};

- return ((msb << 8) | lsb) & RK8XX_ID_MSK;
-}
+static const struct rk8xx_i2c_platform_data rk818_data = {
+ .regmap_cfg = &rk818_regmap_config,
+ .variant = RK818_ID,
+};

static int rk8xx_i2c_probe(struct i2c_client *client)
{
- const struct regmap_config *regmap_cfg;
+ const struct rk8xx_i2c_platform_data *data;
struct regmap *regmap;
- int variant;

- variant = rk8xx_i2c_get_variant(client);
- if (variant < 0)
- return variant;
-
- switch (variant) {
- case RK805_ID:
- regmap_cfg = &rk805_regmap_config;
- break;
- case RK808_ID:
- regmap_cfg = &rk808_regmap_config;
- break;
- case RK818_ID:
- regmap_cfg = &rk818_regmap_config;
- break;
- case RK809_ID:
- case RK817_ID:
- regmap_cfg = &rk817_regmap_config;
- break;
- default:
- return dev_err_probe(&client->dev, -EINVAL, "Unsupported RK8XX ID %x\n", variant);
- }
+ data = device_get_match_data(&client->dev);
+ if (!data)
+ return -ENODEV;

- regmap = devm_regmap_init_i2c(client, regmap_cfg);
+ regmap = devm_regmap_init_i2c(client, data->regmap_cfg);
if (IS_ERR(regmap))
return dev_err_probe(&client->dev, PTR_ERR(regmap),
"regmap initialization failed\n");

- return rk8xx_probe(&client->dev, variant, client->irq, regmap);
+ return rk8xx_probe(&client->dev, data->variant, client->irq, regmap);
}

static void rk8xx_i2c_shutdown(struct i2c_client *client)
@@ -173,11 +158,11 @@ static void rk8xx_i2c_shutdown(struct i2c_client *client)
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" },
- { .compatible = "rockchip,rk808" },
- { .compatible = "rockchip,rk809" },
- { .compatible = "rockchip,rk817" },
- { .compatible = "rockchip,rk818" },
+ { .compatible = "rockchip,rk805", .data = &rk805_data },
+ { .compatible = "rockchip,rk808", .data = &rk808_data },
+ { .compatible = "rockchip,rk809", .data = &rk809_data },
+ { .compatible = "rockchip,rk817", .data = &rk817_data },
+ { .compatible = "rockchip,rk818", .data = &rk818_data },
{ },
};
MODULE_DEVICE_TABLE(of, rk8xx_i2c_of_match);
--
2.39.0