leds: turris-omnia: Inform about missing LED gamma correction feature in the MCU driver

If the LED gamma correction feature is missing in the MCU firmware,
inform about this in the MCU firmware probe function instead of LED
driver probe function, so that all the feature checks are in one place.

Signed-off-by: Marek Behún <kabel@kernel.org>
Link: https://lore.kernel.org/r/20241111100355.6978-10-kabel@kernel.org
Signed-off-by: Lee Jones <lee@kernel.org>

Author: elkablo

drivers/leds/leds-turris-omnia.c

@@ -507,12 +507,6 @@ static int omnia_leds_probe(struct i2c_client *client)
 	}
 
 	leds->has_gamma_correction = ret & OMNIA_FEAT_LED_GAMMA_CORRECTION;
-	if (!leds->has_gamma_correction) {
-		dev_info(dev,
-			 "Your board's MCU firmware does not support the LED gamma correction feature.\n");
-		dev_info(dev,
-			 "Consider upgrading MCU firmware with the omnia-mcutool utility.\n");
-	}
 
 	if (ret & OMNIA_FEAT_BRIGHTNESS_INT) {
 		ret = omnia_request_brightness_irq(leds);

drivers/platform/cznic/turris-omnia-mcu-base.c

@@ -259,6 +259,7 @@ static int omnia_mcu_read_features(struct omnia_mcu *mcu)
 		_DEF_FEAT(POWEROFF_WAKEUP,	"poweroff and wakeup"),
 		_DEF_FEAT(TRNG,			"true random number generator"),
 		_DEF_FEAT(BRIGHTNESS_INT,	"LED panel brightness change interrupt"),
+		_DEF_FEAT(LED_GAMMA_CORRECTION,	"LED gamma correction"),
 #undef _DEF_FEAT
 	};
 	struct i2c_client *client = mcu->client;