From 3afb00d3f86d3d924f88b56fa8285d4e9db85852 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Wed, 7 Aug 2024 15:17:52 +0200 Subject: Merging upstream version 6.10.3. Signed-off-by: Daniel Baumann --- drivers/mfd/rsmu_i2c.c | 107 ++++++++++++++++++++++++++++++++++++++++++------- 1 file changed, 93 insertions(+), 14 deletions(-) (limited to 'drivers/mfd/rsmu_i2c.c') diff --git a/drivers/mfd/rsmu_i2c.c b/drivers/mfd/rsmu_i2c.c index 5711e512b6..cba64f107a 100644 --- a/drivers/mfd/rsmu_i2c.c +++ b/drivers/mfd/rsmu_i2c.c @@ -32,6 +32,8 @@ #define RSMU_SABRE_PAGE_ADDR 0x7F #define RSMU_SABRE_PAGE_WINDOW 128 +typedef int (*rsmu_rw_device)(struct rsmu_ddata *rsmu, u8 reg, u8 *buf, u8 bytes); + static const struct regmap_range_cfg rsmu_sabre_range_cfg[] = { { .range_min = 0, @@ -54,7 +56,28 @@ static bool rsmu_sabre_volatile_reg(struct device *dev, unsigned int reg) } } -static int rsmu_read_device(struct rsmu_ddata *rsmu, u8 reg, u8 *buf, u16 bytes) +static int rsmu_smbus_i2c_write_device(struct rsmu_ddata *rsmu, u8 reg, u8 *buf, u8 bytes) +{ + struct i2c_client *client = to_i2c_client(rsmu->dev); + + return i2c_smbus_write_i2c_block_data(client, reg, bytes, buf); +} + +static int rsmu_smbus_i2c_read_device(struct rsmu_ddata *rsmu, u8 reg, u8 *buf, u8 bytes) +{ + struct i2c_client *client = to_i2c_client(rsmu->dev); + int ret; + + ret = i2c_smbus_read_i2c_block_data(client, reg, bytes, buf); + if (ret == bytes) + return 0; + else if (ret < 0) + return ret; + else + return -EIO; +} + +static int rsmu_i2c_read_device(struct rsmu_ddata *rsmu, u8 reg, u8 *buf, u8 bytes) { struct i2c_client *client = to_i2c_client(rsmu->dev); struct i2c_msg msg[2]; @@ -84,10 +107,11 @@ static int rsmu_read_device(struct rsmu_ddata *rsmu, u8 reg, u8 *buf, u16 bytes) return 0; } -static int rsmu_write_device(struct rsmu_ddata *rsmu, u8 reg, u8 *buf, u16 bytes) +static int rsmu_i2c_write_device(struct rsmu_ddata *rsmu, u8 reg, u8 *buf, u8 bytes) { struct i2c_client *client = to_i2c_client(rsmu->dev); - u8 msg[RSMU_MAX_WRITE_COUNT + 1]; /* 1 Byte added for the device register */ + /* we add 1 byte for device register */ + u8 msg[RSMU_MAX_WRITE_COUNT + 1]; int cnt; if (bytes > RSMU_MAX_WRITE_COUNT) @@ -107,7 +131,8 @@ static int rsmu_write_device(struct rsmu_ddata *rsmu, u8 reg, u8 *buf, u16 bytes return 0; } -static int rsmu_write_page_register(struct rsmu_ddata *rsmu, u32 reg) +static int rsmu_write_page_register(struct rsmu_ddata *rsmu, u32 reg, + rsmu_rw_device rsmu_write_device) { u32 page = reg & RSMU_CM_PAGE_MASK; u8 buf[4]; @@ -136,35 +161,35 @@ static int rsmu_write_page_register(struct rsmu_ddata *rsmu, u32 reg) return err; } -static int rsmu_reg_read(void *context, unsigned int reg, unsigned int *val) +static int rsmu_i2c_reg_read(void *context, unsigned int reg, unsigned int *val) { struct rsmu_ddata *rsmu = i2c_get_clientdata((struct i2c_client *)context); u8 addr = (u8)(reg & RSMU_CM_ADDRESS_MASK); int err; - err = rsmu_write_page_register(rsmu, reg); + err = rsmu_write_page_register(rsmu, reg, rsmu_i2c_write_device); if (err) return err; - err = rsmu_read_device(rsmu, addr, (u8 *)val, 1); + err = rsmu_i2c_read_device(rsmu, addr, (u8 *)val, 1); if (err) dev_err(rsmu->dev, "Failed to read offset address 0x%x\n", addr); return err; } -static int rsmu_reg_write(void *context, unsigned int reg, unsigned int val) +static int rsmu_i2c_reg_write(void *context, unsigned int reg, unsigned int val) { struct rsmu_ddata *rsmu = i2c_get_clientdata((struct i2c_client *)context); u8 addr = (u8)(reg & RSMU_CM_ADDRESS_MASK); u8 data = (u8)val; int err; - err = rsmu_write_page_register(rsmu, reg); + err = rsmu_write_page_register(rsmu, reg, rsmu_i2c_write_device); if (err) return err; - err = rsmu_write_device(rsmu, addr, &data, 1); + err = rsmu_i2c_write_device(rsmu, addr, &data, 1); if (err) dev_err(rsmu->dev, "Failed to write offset address 0x%x\n", addr); @@ -172,12 +197,57 @@ static int rsmu_reg_write(void *context, unsigned int reg, unsigned int val) return err; } -static const struct regmap_config rsmu_cm_regmap_config = { +static int rsmu_smbus_i2c_reg_read(void *context, unsigned int reg, unsigned int *val) +{ + struct rsmu_ddata *rsmu = i2c_get_clientdata((struct i2c_client *)context); + u8 addr = (u8)(reg & RSMU_CM_ADDRESS_MASK); + int err; + + err = rsmu_write_page_register(rsmu, reg, rsmu_smbus_i2c_write_device); + if (err) + return err; + + err = rsmu_smbus_i2c_read_device(rsmu, addr, (u8 *)val, 1); + if (err) + dev_err(rsmu->dev, "Failed to read offset address 0x%x\n", addr); + + return err; +} + +static int rsmu_smbus_i2c_reg_write(void *context, unsigned int reg, unsigned int val) +{ + struct rsmu_ddata *rsmu = i2c_get_clientdata((struct i2c_client *)context); + u8 addr = (u8)(reg & RSMU_CM_ADDRESS_MASK); + u8 data = (u8)val; + int err; + + err = rsmu_write_page_register(rsmu, reg, rsmu_smbus_i2c_write_device); + if (err) + return err; + + err = rsmu_smbus_i2c_write_device(rsmu, addr, &data, 1); + if (err) + dev_err(rsmu->dev, + "Failed to write offset address 0x%x\n", addr); + + return err; +} + +static const struct regmap_config rsmu_i2c_cm_regmap_config = { .reg_bits = 32, .val_bits = 8, .max_register = 0x20120000, - .reg_read = rsmu_reg_read, - .reg_write = rsmu_reg_write, + .reg_read = rsmu_i2c_reg_read, + .reg_write = rsmu_i2c_reg_write, + .cache_type = REGCACHE_NONE, +}; + +static const struct regmap_config rsmu_smbus_i2c_cm_regmap_config = { + .reg_bits = 32, + .val_bits = 8, + .max_register = 0x20120000, + .reg_read = rsmu_smbus_i2c_reg_read, + .reg_write = rsmu_smbus_i2c_reg_write, .cache_type = REGCACHE_NONE, }; @@ -219,7 +289,15 @@ static int rsmu_i2c_probe(struct i2c_client *client) switch (rsmu->type) { case RSMU_CM: - cfg = &rsmu_cm_regmap_config; + if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) { + cfg = &rsmu_i2c_cm_regmap_config; + } else if (i2c_check_functionality(client->adapter, + I2C_FUNC_SMBUS_I2C_BLOCK)) { + cfg = &rsmu_smbus_i2c_cm_regmap_config; + } else { + dev_err(rsmu->dev, "Unsupported i2c adapter\n"); + return -ENOTSUPP; + } break; case RSMU_SABRE: cfg = &rsmu_sabre_regmap_config; @@ -236,6 +314,7 @@ static int rsmu_i2c_probe(struct i2c_client *client) rsmu->regmap = devm_regmap_init(&client->dev, NULL, client, cfg); else rsmu->regmap = devm_regmap_init_i2c(client, cfg); + if (IS_ERR(rsmu->regmap)) { ret = PTR_ERR(rsmu->regmap); dev_err(rsmu->dev, "Failed to allocate register map: %d\n", ret); -- cgit v1.2.3