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mediatek: add led count

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The LEDs connected to the MCU are so-called smart LEDs and their signal is
daisy-chained. Because of this, the MCU needs to be told how many LEDs are
connected. It also means the LEDs could be individually controlled, if the MCU
has a command for this.

Signed-off-by: Sven Wegener <sven.wegener@stealer.net>
(cherry picked from commit 76198e8f09)
This commit is contained in:
Sven Wegener 2021-06-12 21:56:22 +02:00 committed by Daniel Golle
parent 40610c5322
commit 420a86436f
1 changed files with 7 additions and 1 deletions
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8
target/linux/mediatek/files-5.10/drivers/leds/leds-ubnt-ledbar.c
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@ -31,9 +31,11 @@
#define UBNT_LEDBAR_TRANSACTION_BLUE_IDX 2
#define UBNT_LEDBAR_TRANSACTION_GREEN_IDX 3
#define UBNT_LEDBAR_TRANSACTION_RED_IDX 4
#define UBNT_LEDBAR_TRANSACTION_LED_COUNT_IDX 6
struct ubnt_ledbar {
struct mutex lock;
u32 led_count;
struct i2c_client *client;
struct led_classdev led_red;
struct led_classdev led_green;
@ -60,7 +62,7 @@ static int ubnt_ledbar_apply_state(struct ubnt_ledbar *ledbar)
char setup_msg[UBNT_LEDBAR_TRANSACTION_LENGTH] = {0x40, 0x10, 0x00, 0x00,
0x00, 0x00, 0x00, 0x11};
char led_msg[UBNT_LEDBAR_TRANSACTION_LENGTH] = {0x40, 0x00, 0x00, 0x00,
0x00, 0x00, 0x01, 0x00};
0x00, 0x00, 0x00, 0x00};
char i2c_response;
int ret = 0;
@ -69,6 +71,7 @@ static int ubnt_ledbar_apply_state(struct ubnt_ledbar *ledbar)
led_msg[UBNT_LEDBAR_TRANSACTION_BLUE_IDX] = ledbar->led_blue.brightness;
led_msg[UBNT_LEDBAR_TRANSACTION_GREEN_IDX] = ledbar->led_green.brightness;
led_msg[UBNT_LEDBAR_TRANSACTION_RED_IDX] = ledbar->led_red.brightness;
led_msg[UBNT_LEDBAR_TRANSACTION_LED_COUNT_IDX] = ledbar->led_count;
gpiod_set_value(ledbar->enable_gpio, 1);
@ -191,6 +194,9 @@ static int ubnt_ledbar_probe(struct i2c_client *client,
return ret;
}
ledbar->led_count = 1;
of_property_read_u32(np, "led-count", &ledbar->led_count);
ledbar->client = client;
mutex_init(&ledbar->lock);