From 013a956f086dc5d88f6e9cbd852ed4d900d436e0 Mon Sep 17 00:00:00 2001 From: Sven Wegener Date: Sat, 12 Jun 2021 21:56:22 +0200 Subject: mediatek: add initialization after reset During GPIO initialization the pin state flips and triggers a reset of the ledbar MCU. It needs to be moved through an initialization sequence before working correctly. Signed-off-by: Sven Wegener --- .../linux/mediatek/files/drivers/leds/leds-ubnt-ledbar.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+) (limited to 'target') diff --git a/target/linux/mediatek/files/drivers/leds/leds-ubnt-ledbar.c b/target/linux/mediatek/files/drivers/leds/leds-ubnt-ledbar.c index 1d687b7686..10d240d2be 100644 --- a/target/linux/mediatek/files/drivers/leds/leds-ubnt-ledbar.c +++ b/target/linux/mediatek/files/drivers/leds/leds-ubnt-ledbar.c @@ -99,6 +99,12 @@ out_gpio: static void ubnt_ledbar_reset(struct ubnt_ledbar *ledbar) { + static const char init_msg[16] = {0x02, 0x81, 0xfd, 0x7e, + 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00}; + char init_response[4]; + if (!ledbar->reset_gpio) return; @@ -108,6 +114,14 @@ static void ubnt_ledbar_reset(struct ubnt_ledbar *ledbar) msleep(10); gpiod_set_value(ledbar->reset_gpio, 0); + msleep(10); + + gpiod_set_value(ledbar->enable_gpio, 1); + msleep(10); + ubnt_ledbar_perform_transaction(ledbar, init_msg, sizeof(init_msg), init_response, sizeof(init_response)); + msleep(10); + gpiod_set_value(ledbar->enable_gpio, 0); + mutex_unlock(&ledbar->lock); } -- cgit v1.2.3