diff options
Diffstat (limited to 'src/mainboard/google')
| -rw-r--r-- | src/mainboard/google/gru/mainboard.c | 34 |
1 files changed, 3 insertions, 31 deletions
diff --git a/src/mainboard/google/gru/mainboard.c b/src/mainboard/google/gru/mainboard.c index bb9b6fca98..1c823f3e7c 100644 --- a/src/mainboard/google/gru/mainboard.c +++ b/src/mainboard/google/gru/mainboard.c @@ -333,30 +333,8 @@ static void mainboard_init(device_t dev) register_apio_suspend(); } -static void enable_backlight_booster(void) +static void prepare_backlight_i2c(void) { - const struct { - uint8_t reg; - uint8_t value; - } i2c_writes[] = { - {1, 0x84}, - {1, 0x85}, - {0, 0x26} - }; - int i; - const int booster_i2c_port = 0; - uint8_t i2c_buf[2]; - struct i2c_seg i2c_command = { .read = 0, .chip = 0x2c, - .buf = i2c_buf, .len = sizeof(i2c_buf) - }; - - /* - * This function is called on Gru right after BL_EN is asserted. It - * takes time for the switcher chip to come online, let's wait a bit - * to let the voltage settle, so that the chip can be accessed. - */ - udelay(1000); - gpio_input(GPIO(1, B, 7)); /* I2C0_SDA remove pull_up */ gpio_input(GPIO(1, C, 0)); /* I2C0_SCL remove pull_up */ @@ -364,20 +342,14 @@ static void enable_backlight_booster(void) write32(&rk3399_pmugrf->iomux_i2c0_sda, IOMUX_I2C0_SDA); write32(&rk3399_pmugrf->iomux_i2c0_scl, IOMUX_I2C0_SCL); - - for (i = 0; i < ARRAY_SIZE(i2c_writes); i++) { - i2c_buf[0] = i2c_writes[i].reg; - i2c_buf[1] = i2c_writes[i].value; - i2c_transfer(booster_i2c_port, &i2c_command, 1); - } } void mainboard_power_on_backlight(void) { gpio_output(GPIO_BACKLIGHT, 1); /* BL_EN */ - if (IS_ENABLED(CONFIG_BOARD_GOOGLE_GRU) && board_id() == 0) - enable_backlight_booster(); + if (IS_ENABLED(CONFIG_BOARD_GOOGLE_GRU)) + prepare_backlight_i2c(); } static void mainboard_enable(device_t dev) |