diff options
Diffstat (limited to 'drivers/leds')
| -rw-r--r-- | drivers/leds/leds-lp5521.c | 102 | ||||
| -rw-r--r-- | drivers/leds/leds-lp5523.c | 47 |
2 files changed, 84 insertions, 65 deletions
diff --git a/drivers/leds/leds-lp5521.c b/drivers/leds/leds-lp5521.c index cb8a5220200..24f439f78bd 100644 --- a/drivers/leds/leds-lp5521.c +++ b/drivers/leds/leds-lp5521.c @@ -687,6 +687,59 @@ static void lp5521_unregister_sysfs(struct i2c_client *client) &lp5521_led_attribute_group); } +static int lp5521_init_device(struct lp5521_chip *chip) +{ + struct lp5521_platform_data *pdata = chip->pdata; + struct i2c_client *client = chip->client; + int ret; + u8 buf; + + if (pdata->setup_resources) { + ret = pdata->setup_resources(); + if (ret < 0) + return ret; + } + + if (pdata->enable) { + pdata->enable(0); + usleep_range(1000, 2000); /* Keep enable down at least 1ms */ + pdata->enable(1); + usleep_range(1000, 2000); /* 500us abs min. */ + } + + lp5521_write(client, LP5521_REG_RESET, 0xff); + usleep_range(10000, 20000); /* + * Exact value is not available. 10 - 20ms + * appears to be enough for reset. + */ + + /* + * Make sure that the chip is reset by reading back the r channel + * current reg. This is dummy read is required on some platforms - + * otherwise further access to the R G B channels in the + * LP5521_REG_ENABLE register will not have any effect - strange! + */ + ret = lp5521_read(client, LP5521_REG_R_CURRENT, &buf); + if (ret) { + dev_err(&client->dev, "error in resetting chip\n"); + return ret; + } + if (buf != LP5521_REG_R_CURR_DEFAULT) { + dev_err(&client->dev, + "unexpected data in register (expected 0x%x got 0x%x)\n", + LP5521_REG_R_CURR_DEFAULT, buf); + ret = -EINVAL; + return ret; + } + usleep_range(10000, 20000); + + ret = lp5521_detect(client); + if (ret) + dev_err(&client->dev, "Chip not found\n"); + + return ret; +} + static int lp5521_init_led(struct lp5521_led *led, struct i2c_client *client, int chan, struct lp5521_platform_data *pdata) @@ -742,7 +795,6 @@ static int lp5521_probe(struct i2c_client *client, struct lp5521_chip *chip; struct lp5521_platform_data *pdata; int ret, i, led; - u8 buf; chip = devm_kzalloc(&client->dev, sizeof(*chip), GFP_KERNEL); if (!chip) @@ -762,51 +814,9 @@ static int lp5521_probe(struct i2c_client *client, chip->pdata = pdata; - if (pdata->setup_resources) { - ret = pdata->setup_resources(); - if (ret < 0) - return ret; - } - - if (pdata->enable) { - pdata->enable(0); - usleep_range(1000, 2000); /* Keep enable down at least 1ms */ - pdata->enable(1); - usleep_range(1000, 2000); /* 500us abs min. */ - } - - lp5521_write(client, LP5521_REG_RESET, 0xff); - usleep_range(10000, 20000); /* - * Exact value is not available. 10 - 20ms - * appears to be enough for reset. - */ - - /* - * Make sure that the chip is reset by reading back the r channel - * current reg. This is dummy read is required on some platforms - - * otherwise further access to the R G B channels in the - * LP5521_REG_ENABLE register will not have any effect - strange! - */ - ret = lp5521_read(client, LP5521_REG_R_CURRENT, &buf); - if (ret) { - dev_err(&client->dev, "error in resetting chip\n"); - goto fail2; - } - if (buf != LP5521_REG_R_CURR_DEFAULT) { - dev_err(&client->dev, - "unexpected data in register (expected 0x%x got 0x%x)\n", - LP5521_REG_R_CURR_DEFAULT, buf); - ret = -EINVAL; - goto fail2; - } - usleep_range(10000, 20000); - - ret = lp5521_detect(client); - - if (ret) { - dev_err(&client->dev, "Chip not found\n"); - goto fail2; - } + ret = lp5521_init_device(chip); + if (ret) + goto fail1; dev_info(&client->dev, "%s programmable led chip found\n", id->name); diff --git a/drivers/leds/leds-lp5523.c b/drivers/leds/leds-lp5523.c index 7f5be8948cd..491ea725bb0 100644 --- a/drivers/leds/leds-lp5523.c +++ b/drivers/leds/leds-lp5523.c @@ -896,6 +896,33 @@ static int lp5523_init_led(struct lp5523_led *led, struct device *dev, return 0; } +static int lp5523_init_device(struct lp5523_chip *chip) +{ + struct lp5523_platform_data *pdata = chip->pdata; + struct i2c_client *client = chip->client; + int ret; + + if (pdata->setup_resources) { + ret = pdata->setup_resources(); + if (ret < 0) + return ret; + } + + if (pdata->enable) { + pdata->enable(0); + usleep_range(1000, 2000); /* Keep enable down at least 1ms */ + pdata->enable(1); + usleep_range(1000, 2000); /* 500us abs min. */ + } + + lp5523_write(client, LP5523_REG_RESET, 0xff); + usleep_range(10000, 20000); /* + * Exact value is not available. 10 - 20ms + * appears to be enough for reset. + */ + return lp5523_detect(client); +} + static int lp5523_probe(struct i2c_client *client, const struct i2c_device_id *id) { @@ -921,25 +948,7 @@ static int lp5523_probe(struct i2c_client *client, chip->pdata = pdata; - if (pdata->setup_resources) { - ret = pdata->setup_resources(); - if (ret < 0) - return ret; - } - - if (pdata->enable) { - pdata->enable(0); - usleep_range(1000, 2000); /* Keep enable down at least 1ms */ - pdata->enable(1); - usleep_range(1000, 2000); /* 500us abs min. */ - } - - lp5523_write(client, LP5523_REG_RESET, 0xff); - usleep_range(10000, 20000); /* - * Exact value is not available. 10 - 20ms - * appears to be enough for reset. - */ - ret = lp5523_detect(client); + ret = lp5523_init_device(chip); if (ret) goto fail1; |