int lp55xx_init_device(struct lp55xx_chip *chip)
{
struct lp55xx_platform_data *pdata;
struct lp55xx_device_config *cfg;
struct device *dev = &chip->cl->dev;
int ret = 0;
WARN_ON(!chip);
pdata = chip->pdata;
cfg = chip->cfg;
if (!pdata || !cfg)
return -EINVAL;
if (gpio_is_valid(pdata->enable_gpio)) {
ret = devm_gpio_request_one(dev, pdata->enable_gpio,
GPIOF_DIR_OUT, "lp5523_enable");
if (ret < 0) {
dev_err(dev, "could not acquire enable gpio (err=%d)\n",
ret);
goto err;
}
gpio_set_value(pdata->enable_gpio, 0);
usleep_range(1000, 2000); /* Keep enable down at least 1ms */
gpio_set_value(pdata->enable_gpio, 1);
usleep_range(1000, 2000); /* 500us abs min. */
}
lp55xx_reset_device(chip);
/*
* Exact value is not available. 10 - 20ms
* appears to be enough for reset.
*/
usleep_range(10000, 20000);
ret = lp55xx_detect_device(chip);
if (ret) {
dev_err(dev, "device detection err: %d\n", ret);
goto err;
}
/* chip specific initialization */
ret = lp55xx_post_init_device(chip);
if (ret) {
dev_err(dev, "post init device err: %d\n", ret);
goto err_post_init;
}
return 0;
err_post_init:
lp55xx_deinit_device(chip);
err:
return ret;
}
int lp55xx_init_device(struct lp55xx_chip *chip)
{
struct lp55xx_platform_data *pdata;
struct lp55xx_device_config *cfg;
struct device *dev = &chip->cl->dev;
int ret = 0;
WARN_ON(!chip);
pdata = chip->pdata;
cfg = chip->cfg;
if (!pdata || !cfg)
return -EINVAL;
#if 0
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. */
}
#else
ret = gpio_request(pdata->en_gpio, "led_en");
if(ret) {
pr_err("%s: Failed to get gpio %d (code: %d)",
__func__, pdata->en_gpio, ret);
return ret;
}
ret = gpio_direction_output(pdata->en_gpio, 1);
gpio_set_value(pdata->en_gpio, 0);
usleep_range(1000,2000);
gpio_set_value(pdata->en_gpio, 1);
usleep_range(1000,2000);
#endif
lp55xx_reset_device(chip);
/*
* Exact value is not available. 10 - 20ms
* appears to be enough for reset.
*/
usleep_range(10000, 20000);
ret = lp55xx_detect_device(chip);
if (ret) {
dev_err(dev, "device detection err: %d\n", ret);
goto err;
}
/* chip specific initialization */
ret = lp55xx_post_init_device(chip);
if (ret) {
dev_err(dev, "post init device err: %d\n", ret);
goto err_post_init;
}
return 0;
err_post_init:
lp55xx_deinit_device(chip);
err:
return ret;
}