diff options
Diffstat (limited to 'drivers/leds/leds-lp55xx-common.c')
| -rw-r--r-- | drivers/leds/leds-lp55xx-common.c | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/drivers/leds/leds-lp55xx-common.c b/drivers/leds/leds-lp55xx-common.c index 1c716ecfa817..05a854c0d9b2 100644 --- a/drivers/leds/leds-lp55xx-common.c +++ b/drivers/leds/leds-lp55xx-common.c @@ -12,6 +12,7 @@ * Derived from leds-lp5521.c, leds-lp5523.c */ +#include <linux/delay.h> #include <linux/i2c.h> #include <linux/leds.h> #include <linux/module.h> @@ -54,6 +55,39 @@ int lp55xx_update_bits(struct lp55xx_chip *chip, u8 reg, u8 mask, u8 val) } EXPORT_SYMBOL_GPL(lp55xx_update_bits); +int lp55xx_init_device(struct lp55xx_chip *chip) +{ + struct lp55xx_platform_data *pdata; + struct device *dev = &chip->cl->dev; + int ret = 0; + + WARN_ON(!chip); + + pdata = chip->pdata; + + if (!pdata) + return -EINVAL; + + if (pdata->setup_resources) { + ret = pdata->setup_resources(); + if (ret < 0) { + dev_err(dev, "setup resoure err: %d\n", ret); + goto err; + } + } + + 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. */ + } + +err: + return ret; +} +EXPORT_SYMBOL_GPL(lp55xx_init_device); + MODULE_AUTHOR("Milo Kim <milo.kim@ti.com>"); MODULE_DESCRIPTION("LP55xx Common Driver"); MODULE_LICENSE("GPL"); |