[PATCH] leds: pca9532: Fix inverted GPIO output polarity

[PATCH] leds: pca9532: Fix inverted GPIO output polarity

[Cosmo Chou]

The pca9532_gpio_set_value() function incorrectly mapped the requested
value to PCA9532_ON and PCA9532_OFF, inverting the GPIO output polarity.
A requested logical high (val=1) incorrectly enabled the LED output
driver, which on this open-drain device pulls the pin low, while a
requested logical low (val=0) released the pin.

Correct the mapping so that val=1 yields PCA9532_OFF (pin released /
high-impedance) and val=0 yields PCA9532_ON (pin driven low).

pca9532_gpio_direction_input() is also updated to pass val=1 to
pca9532_gpio_set_value() to align with the corrected polarity mapping,
ensuring the pin remains not driven when configured as an input.

Fixes: <3c1ab50d0a31b27bb4e55168f4901dd91e6e5ea4> ("drivers/leds/leds-pca9532.c: add gpio capability")
Signed-off-by: Cosmo Chou <chou.cosmo@gmail.com>
---
 drivers/leds/leds-pca9532.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/leds/leds-pca9532.c b/drivers/leds/leds-pca9532.c
index 0344189bb991..80bf94e699d4 100644
--- a/drivers/leds/leds-pca9532.c
+++ b/drivers/leds/leds-pca9532.c
@@ -325,9 +325,9 @@ static int pca9532_gpio_set_value(struct gpio_chip *gc, unsigned int offset,
 	struct pca9532_led *led = &data->leds[offset];
 
 	if (val)
-		led->state = PCA9532_ON;
-	else
 		led->state = PCA9532_OFF;
+	else
+		led->state = PCA9532_ON;
 
 	pca9532_setled(led);
 
@@ -347,7 +347,7 @@ static int pca9532_gpio_get_value(struct gpio_chip *gc, unsigned offset)
 static int pca9532_gpio_direction_input(struct gpio_chip *gc, unsigned offset)
 {
 	/* To use as input ensure pin is not driven */
-	pca9532_gpio_set_value(gc, offset, 0);
+	pca9532_gpio_set_value(gc, offset, 1);
 
 	return 0;
 }
-- 
2.43.0

Re: [PATCH] leds: pca9532: Fix inverted GPIO output polarity

[Lee Jones]

 n Wed, 17 Jun 2026, Cosmo Chou wrote:

> The pca9532_gpio_set_value() function incorrectly mapped the requested
> value to PCA9532_ON and PCA9532_OFF, inverting the GPIO output polarity.
> A requested logical high (val=1) incorrectly enabled the LED output
> driver, which on this open-drain device pulls the pin low, while a
> requested logical low (val=0) released the pin.
> 
> Correct the mapping so that val=1 yields PCA9532_OFF (pin released /
> high-impedance) and val=0 yields PCA9532_ON (pin driven low).
> 
> pca9532_gpio_direction_input() is also updated to pass val=1 to
> pca9532_gpio_set_value() to align with the corrected polarity mapping,
> ensuring the pin remains not driven when configured as an input.
> 
> Fixes: <3c1ab50d0a31b27bb4e55168f4901dd91e6e5ea4> ("drivers/leds/leds-pca9532.c: add gpio capability")

'Fixes: 3c1ab50d0a31 ("drivers/leds/leds-pca9532.c: add gpio capability")'

> Signed-off-by: Cosmo Chou <chou.cosmo@gmail.com>
> ---
>  drivers/leds/leds-pca9532.c | 6 +++---
>  1 file changed, 3 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/leds/leds-pca9532.c b/drivers/leds/leds-pca9532.c
> index 0344189bb991..80bf94e699d4 100644
> --- a/drivers/leds/leds-pca9532.c
> +++ b/drivers/leds/leds-pca9532.c
> @@ -325,9 +325,9 @@ static int pca9532_gpio_set_value(struct gpio_chip *gc, unsigned int offset,
>  	struct pca9532_led *led = &data->leds[offset];
>  
>  	if (val)
> -		led->state = PCA9532_ON;
> -	else
>  		led->state = PCA9532_OFF;
> +	else
> +		led->state = PCA9532_ON;
>  
>  	pca9532_setled(led);
>  
> @@ -347,7 +347,7 @@ static int pca9532_gpio_get_value(struct gpio_chip *gc, unsigned offset)
>  static int pca9532_gpio_direction_input(struct gpio_chip *gc, unsigned offset)
>  {
>  	/* To use as input ensure pin is not driven */
> -	pca9532_gpio_set_value(gc, offset, 0);
> +	pca9532_gpio_set_value(gc, offset, 1);
>  
>  	return 0;
>  }
> -- 
> 2.43.0
> 

-- 
Lee Jones