From 0f86815ad0a2c0c70cbe0ecc2f80571726285461 Mon Sep 17 00:00:00 2001 From: Peter Ujfalusi Date: Fri, 21 Dec 2012 01:43:56 -0800 Subject: leds: leds-pwm: Preparing the driver for device tree support In order to be able to add device tree support for leds-pwm driver we need to rearrange the data structures used by the drivers. Signed-off-by: Peter Ujfalusi Signed-off-by: Bryan Wu --- drivers/leds/leds-pwm.c | 39 +++++++++++++++++++++++---------------- 1 file changed, 23 insertions(+), 16 deletions(-) (limited to 'drivers') diff --git a/drivers/leds/leds-pwm.c b/drivers/leds/leds-pwm.c index 351257c2a7b8..c767837522fe 100644 --- a/drivers/leds/leds-pwm.c +++ b/drivers/leds/leds-pwm.c @@ -30,6 +30,11 @@ struct led_pwm_data { unsigned int period; }; +struct led_pwm_priv { + int num_leds; + struct led_pwm_data leds[0]; +}; + static void led_pwm_set(struct led_classdev *led_cdev, enum led_brightness brightness) { @@ -47,25 +52,29 @@ static void led_pwm_set(struct led_classdev *led_cdev, } } +static inline size_t sizeof_pwm_leds_priv(int num_leds) +{ + return sizeof(struct led_pwm_priv) + + (sizeof(struct led_pwm_data) * num_leds); +} + static int led_pwm_probe(struct platform_device *pdev) { struct led_pwm_platform_data *pdata = pdev->dev.platform_data; - struct led_pwm *cur_led; - struct led_pwm_data *leds_data, *led_dat; + struct led_pwm_priv *priv; int i, ret = 0; if (!pdata) return -EBUSY; - leds_data = devm_kzalloc(&pdev->dev, - sizeof(struct led_pwm_data) * pdata->num_leds, - GFP_KERNEL); - if (!leds_data) + priv = devm_kzalloc(&pdev->dev, sizeof_pwm_leds_priv(pdata->num_leds), + GFP_KERNEL); + if (!priv) return -ENOMEM; for (i = 0; i < pdata->num_leds; i++) { - cur_led = &pdata->leds[i]; - led_dat = &leds_data[i]; + struct led_pwm *cur_led = &pdata->leds[i]; + struct led_pwm_data *led_dat = &priv->leds[i]; led_dat->pwm = devm_pwm_get(&pdev->dev, cur_led->name); if (IS_ERR(led_dat->pwm)) { @@ -88,15 +97,16 @@ static int led_pwm_probe(struct platform_device *pdev) if (ret < 0) goto err; } + priv->num_leds = pdata->num_leds; - platform_set_drvdata(pdev, leds_data); + platform_set_drvdata(pdev, priv); return 0; err: if (i > 0) { for (i = i - 1; i >= 0; i--) - led_classdev_unregister(&leds_data[i].cdev); + led_classdev_unregister(&priv->leds[i].cdev); } return ret; @@ -104,14 +114,11 @@ err: static int led_pwm_remove(struct platform_device *pdev) { + struct led_pwm_priv *priv = platform_get_drvdata(pdev); int i; - struct led_pwm_platform_data *pdata = pdev->dev.platform_data; - struct led_pwm_data *leds_data; - - leds_data = platform_get_drvdata(pdev); - for (i = 0; i < pdata->num_leds; i++) - led_classdev_unregister(&leds_data[i].cdev); + for (i = 0; i < priv->num_leds; i++) + led_classdev_unregister(&priv->leds[i].cdev); return 0; } -- cgit v1.2.3