Patch fe527ea5a "mfd: max8925: Support dt for backlight"
added a new function for DT probing but introduced a
build warning for the case where CONFIG_OF is disabled:
drivers/video/backlight/max8925_bl.c: In function 'max8925_backlight_probe':
drivers/video/backlight/max8925_bl.c:177:3: warning: statement with no effect
[-Wunused-value]
A much nicer fix is to use the IS_ENABLED keyword to
have the same effect of dropping the device tree specific
function when it's not needed.
Signed-off-by: Arnd Bergmann <a...@arndb.de>
Cc: Qing Xu <qi...@marvell.com>
Cc: Haojian Zhuang <haojian.zhu...@gmail.com>
Cc: Samuel Ortiz <sa...@linux.intel.com>
---
drivers/video/backlight/max8925_bl.c | 6 +-----
1 file changed, 1 insertion(+), 5 deletions(-)
diff --git a/drivers/video/backlight/max8925_bl.c
b/drivers/video/backlight/max8925_bl.c
index 5ca11b0..9958fb1 100644
--- a/drivers/video/backlight/max8925_bl.c
+++ b/drivers/video/backlight/max8925_bl.c
@@ -101,14 +101,13 @@ static const struct backlight_ops max8925_backlight_ops =
{
.get_brightness = max8925_backlight_get_brightness,
};
-#ifdef CONFIG_OF
static int max8925_backlight_dt_init(struct platform_device *pdev,
struct max8925_backlight_pdata *pdata)
{
struct device_node *nproot = pdev->dev.parent->of_node, *np;
int dual_string;
- if (!nproot)
+ if (!nproot || !IS_ENABLED(CONFIG_OF))
return -ENODEV;
np = of_find_node_by_name(nproot, "backlight");
if (!np) {
@@ -120,9 +119,6 @@ static int max8925_backlight_dt_init(struct platform_device
*pdev,
pdata->dual_string = dual_string;
return 0;
}
-#else
-#define max8925_backlight_dt_init(x, y) (-1)
-#endif
static int max8925_backlight_probe(struct platform_device *pdev)
{
--
1.8.1.2
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