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leds: pca9532: Explicitly disable hardware blink when PWM1 is unavailable

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When a LED is used to drive a beeper, it uses PWM1. This can cause
conflicts if an other LED want to use PWM1 for blinking.

Disable use of hardware for blinking when one or more LEDs are used to
drive beepers.

Signed-off-by: Bastien Curutchet <bastien.curutchet@bootlin.com>
Link: https://lore.kernel.org/r/20240617143910.154546-4-bastien.curutchet@bootlin.com
Signed-off-by: Lee Jones <lee@kernel.org>
This commit is contained in:
Bastien Curutchet 2024-06-17 16:39:09 +02:00 committed by Lee Jones
parent 48ca7f302c
commit f51bc3cedf
1 changed files with 9 additions and 0 deletions
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9
drivers/leds/leds-pca9532.c
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@ -53,6 +53,7 @@ struct pca9532_data {
#define PCA9532_PWM_ID_1 1
u8 pwm[2];
u8 psc[2];
bool hw_blink;
};
static int pca9532_probe(struct i2c_client *client);
@ -238,8 +239,13 @@ static int pca9532_set_blink(struct led_classdev *led_cdev,
unsigned long *delay_on, unsigned long *delay_off)
{
struct pca9532_led *led = ldev_to_led(led_cdev);
struct i2c_client *client = led->client;
struct pca9532_data *data = i2c_get_clientdata(client);
int err;
if (!data->hw_blink)
return -EINVAL;
if (*delay_on == 0 && *delay_off == 0) {
/* led subsystem ask us for a blink rate */
*delay_on = 1000;
@ -395,6 +401,7 @@ static int pca9532_configure(struct i2c_client *client,
data->psc[i]);
}
data->hw_blink = true;
for (i = 0; i < data->chip_info->num_leds; i++) {
struct pca9532_led *led = &data->leds[i];
struct pca9532_led *pled = &pdata->leds[i];
@ -429,6 +436,8 @@ static int pca9532_configure(struct i2c_client *client,
pca9532_setled(led);
break;
case PCA9532_TYPE_N2100_BEEP:
/* PWM1 is reserved for beeper so blink will not use hardware */
data->hw_blink = false;
BUG_ON(data->idev);
led->state = PCA9532_PWM1;
pca9532_setled(led);