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authorBen Dooks <ben-linux@fluff.org>2008-08-05 13:01:22 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2008-08-05 14:33:48 -0700
commit14563a4ec450f35c70fbe5f6ac5199e9d5a0edc5 (patch)
tree07cc513465e074eef9d0f369dc639af845b1db8d /drivers
parent26cb8bb21b11245a53f79d9fa766537752f77d88 (diff)
downloadlinux-stericsson-14563a4ec450f35c70fbe5f6ac5199e9d5a0edc5.tar.gz
backlight: add more information output to pwm_backlight
Make the error paths in the pwm_backlight driver more informative in the probe path, especially for the times that it finds an error. Cc: Russell King <rmk@arm.linux.org.uk> Signed-off-by: Ben Dooks <ben-linux@fluff.org> Cc: Richard Purdie <rpurdie@rpsys.net> Acked-by: Krzysztof Helt <krzysztof.h1@wp.pl> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/video/backlight/pwm_bl.c8
1 files changed, 6 insertions, 2 deletions
diff --git a/drivers/video/backlight/pwm_bl.c b/drivers/video/backlight/pwm_bl.c
index 6338d0e2fe07..441e5a707d37 100644
--- a/drivers/video/backlight/pwm_bl.c
+++ b/drivers/video/backlight/pwm_bl.c
@@ -68,8 +68,10 @@ static int pwm_backlight_probe(struct platform_device *pdev)
struct pwm_bl_data *pb;
int ret;
- if (!data)
+ if (!data) {
+ dev_err(&pdev->dev, "failed to find platform data\n");
return -EINVAL;
+ }
if (data->init) {
ret = data->init(&pdev->dev);
@@ -79,6 +81,7 @@ static int pwm_backlight_probe(struct platform_device *pdev)
pb = kzalloc(sizeof(*pb), GFP_KERNEL);
if (!pb) {
+ dev_err(&pdev->dev, "no memory for state\n");
ret = -ENOMEM;
goto err_alloc;
}
@@ -91,7 +94,8 @@ static int pwm_backlight_probe(struct platform_device *pdev)
dev_err(&pdev->dev, "unable to request PWM for backlight\n");
ret = PTR_ERR(pb->pwm);
goto err_pwm;
- }
+ } else
+ dev_dbg(&pdev->dev, "got pwm for backlight\n");
bl = backlight_device_register(pdev->name, &pdev->dev,
pb, &pwm_backlight_ops);