[PATCH 6.6 484/638] backlight: ktz8866: Correct the check for of_property_read_u32

[Sasha Levin]

From: Jianhua Lu <lujianhua000@xxxxxxxxx>

[ Upstream commit f1ac3c9825f99c93a9833beee6b78aa386e55b0b ]

of_property_read_u32 returns 0 when success, so reverse the
return value to get the true value.

Fixes: f8449c8f7355 ("backlight: ktz8866: Add support for Kinetic KTZ8866 backlight")
Signed-off-by: Jianhua Lu <lujianhua000@xxxxxxxxx>
Reviewed-by: Daniel Thompson <daniel.thompson@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20240129122829.16248-1-lujianhua000@xxxxxxxxx
Signed-off-by: Lee Jones <lee@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 drivers/video/backlight/ktz8866.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/video/backlight/ktz8866.c b/drivers/video/backlight/ktz8866.c
index 9c980f2571ee3..014877b5a9848 100644
--- a/drivers/video/backlight/ktz8866.c
+++ b/drivers/video/backlight/ktz8866.c
@@ -97,20 +97,20 @@ static void ktz8866_init(struct ktz8866 *ktz)
 {
 	unsigned int val = 0;
 
-	if (of_property_read_u32(ktz->client->dev.of_node, "current-num-sinks", &val))
+	if (!of_property_read_u32(ktz->client->dev.of_node, "current-num-sinks", &val))
 		ktz8866_write(ktz, BL_EN, BIT(val) - 1);
 	else
 		/* Enable all 6 current sinks if the number of current sinks isn't specified. */
 		ktz8866_write(ktz, BL_EN, BIT(6) - 1);
 
-	if (of_property_read_u32(ktz->client->dev.of_node, "kinetic,current-ramp-delay-ms", &val)) {
+	if (!of_property_read_u32(ktz->client->dev.of_node, "kinetic,current-ramp-delay-ms", &val)) {
 		if (val <= 128)
 			ktz8866_write(ktz, BL_CFG2, BIT(7) | (ilog2(val) << 3) | PWM_HYST);
 		else
 			ktz8866_write(ktz, BL_CFG2, BIT(7) | ((5 + val / 64) << 3) | PWM_HYST);
 	}
 
-	if (of_property_read_u32(ktz->client->dev.of_node, "kinetic,led-enable-ramp-delay-ms", &val)) {
+	if (!of_property_read_u32(ktz->client->dev.of_node, "kinetic,led-enable-ramp-delay-ms", &val)) {
 		if (val == 0)
 			ktz8866_write(ktz, BL_DIMMING, 0);
 		else {
-- 
2.43.0