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| author | Bartosz Golaszewski <brgl@bgdev.pl> | 2018-03-19 12:17:18 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-03-23 18:25:44 +0300 |
| commit | 551a12669d85b5121e66bf39ff194efd7d1d9ac0 (patch) | |
| tree | b3572b47def0a292856768a97ea773f5acdf169f /drivers/misc | |
| parent | 7c2806642ecf3adabec005cc78ff2bf444d4acba (diff) | |
| download | linux-551a12669d85b5121e66bf39ff194efd7d1d9ac0.tar.xz | |
eeprom: at24: refactor at24_probe()
The code in at24_probe() is pretty mangled. It can be cleaned up a bit
by doing things one by one.
Let's group the code by logic: parse and verify pdata, initialize the
regmap, allocate and fill the fields of at24_data, allocate dummy i2c
devices, initialize pm & register with nvmem.
Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl>
Tested-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/misc')
| -rw-r--r-- | drivers/misc/eeprom/at24.c | 34 |
1 files changed, 18 insertions, 16 deletions
diff --git a/drivers/misc/eeprom/at24.c b/drivers/misc/eeprom/at24.c index 6895cd276bc4..f871439d499d 100644 --- a/drivers/misc/eeprom/at24.c +++ b/drivers/misc/eeprom/at24.c @@ -566,6 +566,7 @@ static int at24_probe(struct i2c_client *client) struct device *dev = &client->dev; unsigned int i, num_addresses; struct at24_data *at24; + struct regmap *regmap; size_t at24_size; bool writable; u8 test_byte; @@ -575,6 +576,11 @@ static int at24_probe(struct i2c_client *client) if (err) return err; + if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C) && + !i2c_check_functionality(client->adapter, + I2C_FUNC_SMBUS_WRITE_I2C_BLOCK)) + pdata.page_size = 1; + if (!pdata.page_size) { dev_err(dev, "page_size must not be 0!\n"); return -EINVAL; @@ -582,21 +588,26 @@ static int at24_probe(struct i2c_client *client) if (!is_power_of_2(pdata.page_size)) dev_warn(dev, "page_size looks suspicious (no power of 2)!\n"); - if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C) && - !i2c_check_functionality(client->adapter, - I2C_FUNC_SMBUS_WRITE_I2C_BLOCK)) - pdata.page_size = 1; - if (pdata.flags & AT24_FLAG_TAKE8ADDR) num_addresses = 8; else num_addresses = DIV_ROUND_UP(pdata.byte_len, (pdata.flags & AT24_FLAG_ADDR16) ? 65536 : 256); + if ((pdata.flags & AT24_FLAG_SERIAL) && (pdata.flags & AT24_FLAG_MAC)) { + dev_err(dev, + "invalid device data - cannot have both AT24_FLAG_SERIAL & AT24_FLAG_MAC."); + return -EINVAL; + } + regmap_config.val_bits = 8; regmap_config.reg_bits = (pdata.flags & AT24_FLAG_ADDR16) ? 16 : 8; regmap_config.disable_locking = true; + regmap = devm_regmap_init_i2c(client, ®map_config); + if (IS_ERR(regmap)) + return PTR_ERR(regmap); + at24_size = sizeof(*at24) + num_addresses * sizeof(struct at24_client); at24 = devm_kzalloc(dev, at24_size, GFP_KERNEL); if (!at24) @@ -608,22 +619,13 @@ static int at24_probe(struct i2c_client *client) at24->flags = pdata.flags; at24->num_addresses = num_addresses; at24->offset_adj = at24_get_offset_adj(pdata.flags, pdata.byte_len); + at24->client[0].client = client; + at24->client[0].regmap = regmap; at24->wp_gpio = devm_gpiod_get_optional(dev, "wp", GPIOD_OUT_HIGH); if (IS_ERR(at24->wp_gpio)) return PTR_ERR(at24->wp_gpio); - at24->client[0].client = client; - at24->client[0].regmap = devm_regmap_init_i2c(client, ®map_config); - if (IS_ERR(at24->client[0].regmap)) - return PTR_ERR(at24->client[0].regmap); - - if ((pdata.flags & AT24_FLAG_SERIAL) && (pdata.flags & AT24_FLAG_MAC)) { - dev_err(dev, - "invalid device data - cannot have both AT24_FLAG_SERIAL & AT24_FLAG_MAC."); - return -EINVAL; - } - writable = !(pdata.flags & AT24_FLAG_READONLY); if (writable) { at24->write_max = min_t(unsigned int, |