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Subject[PATCH 2/2] leds-bcm6328: Swap LED ON and OFF definitions
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The values of BCM6328_LED_MODE_ON and BCM6328_LED_MODE_OFF were named
for active low LEDs. These should be swapped so that they are named for
the default case of active high LEDs.

Signed-off-by: Simon Arlott <simon@fire.lp0.eu>
---
On 05/11/15 10:41, Jacek Anaszewski wrote:
> On 11/04/2015 04:46 PM, Álvaro Fernández Rojas wrote:
>> BCM6328_LED_MODE_ON and BCM6328_LED_MODE_OFF values were extracted from
>> Broadcom's GPL code, in which they assume leds are active low by default.
>> I can confirm the code is correct as it is right now, since those values
>> match the active high / low values of the LEDs managed by GPIO instead
>> of by using this driver.
>
> BCM6328_LED_MODE_ON and BCM6328_LED_MODE_OFF should represent the values
> that actually set the LED state according to the current logic.
> Otherwise it will confuse people who will be analyzing this code.
> We are interested in the logic as it is seen from this driver's
> perspective and not GPIO perspective.
>
> IMO the values should be swapped.

drivers/leds/leds-bcm6328.c | 12 ++++++------
1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/drivers/leds/leds-bcm6328.c b/drivers/leds/leds-bcm6328.c
index 95d0cf9..0329dee 100644
--- a/drivers/leds/leds-bcm6328.c
+++ b/drivers/leds/leds-bcm6328.c
@@ -48,10 +48,10 @@
BCM6328_SERIAL_LED_SHIFT_DIR)

#define BCM6328_LED_MODE_MASK 3
-#define BCM6328_LED_MODE_OFF 0
+#define BCM6328_LED_MODE_ON 0
#define BCM6328_LED_MODE_FAST 1
#define BCM6328_LED_MODE_BLINK 2
-#define BCM6328_LED_MODE_ON 3
+#define BCM6328_LED_MODE_OFF 3
#define BCM6328_LED_SHIFT(X) ((X) << 1)

/**
@@ -126,9 +126,9 @@ static void bcm6328_led_set(struct led_classdev *led_cdev,
*(led->blink_leds) &= ~BIT(led->pin);
if ((led->active_low && value == LED_OFF) ||
(!led->active_low && value != LED_OFF))
- bcm6328_led_mode(led, BCM6328_LED_MODE_OFF);
- else
bcm6328_led_mode(led, BCM6328_LED_MODE_ON);
+ else
+ bcm6328_led_mode(led, BCM6328_LED_MODE_OFF);
spin_unlock_irqrestore(led->lock, flags);
}

@@ -303,8 +303,8 @@ static int bcm6328_led(struct device *dev, struct device_node *nc, u32 reg,
val = bcm6328_led_read(mode) >>
BCM6328_LED_SHIFT(shift % 16);
val &= BCM6328_LED_MODE_MASK;
- if ((led->active_low && val == BCM6328_LED_MODE_ON) ||
- (!led->active_low && val == BCM6328_LED_MODE_OFF))
+ if ((led->active_low && val == BCM6328_LED_MODE_OFF) ||
+ (!led->active_low && val == BCM6328_LED_MODE_ON))
led->cdev.brightness = LED_FULL;
else
led->cdev.brightness = LED_OFF;
--
2.1.4
--
Simon Arlott


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