[PATCH v6 4/9] leds: st1202: set all pattern PWM slots to full after clearing pattern

[Manuel Fombuena]

pattern_clear() zeros all PWM registers then restores only Pattern0 to
full duty cycle. Patterns 1-7 are left at zero.

The LED1202 has a single global sequencer shared across all channels. If
another channel starts the sequencer after this one has been cleared, the
cleared channel cycles through its PWM steps — full brightness on step 0,
dark for steps 1-7 — producing an unintended blink.

Set all 8 PWM slots to ST1202_PATTERN_PWM_FULL and unify into a single
loop from 0, ensuring the channel outputs steady ILED regardless of which
sequencer step is active.

Signed-off-by: Manuel Fombuena <fombuena@xxxxxxxxxxx>
Assisted-by: Claude:claude-sonnet-4-6
---
 drivers/leds/leds-st1202.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/leds/leds-st1202.c b/drivers/leds/leds-st1202.c
index b4adade49898..3203b3768ec5 100644
--- a/drivers/leds/leds-st1202.c
+++ b/drivers/leds/leds-st1202.c
@@ -35,6 +35,7 @@
 #define ST1202_MILLIS_PATTERN_DUR_MIN      22
 #define ST1202_PATTERN_DUR                 0x16
 #define ST1202_PATTERN_PWM                 0x1E
+#define ST1202_PATTERN_PWM_FULL            0x0FFF
 #define ST1202_PATTERN_REP                 0x15
 
 struct st1202_led {
@@ -205,7 +206,7 @@ static int st1202_led_pattern_clear(struct led_classdev *ldev)
 		return ret;
 
 	for (int patt = 0; patt < ST1202_MAX_PATTERNS; patt++) {
-		ret = st1202_pwm_pattern_write(chip, led->led_num, patt, LED_OFF);
+		ret = st1202_pwm_pattern_write(chip, led->led_num, patt, ST1202_PATTERN_PWM_FULL);
 		if (ret != 0)
 			return ret;
 
-- 
2.55.0