diff options
| author | David Hendricks <dhendrix@chromium.org> | 2012-06-25 13:51:46 -0700 |
|---|---|---|
| committer | Gerrit <chrome-bot@google.com> | 2012-07-02 15:26:02 -0700 |
| commit | 1bedd55970387fd019c5a6fd368b1576606e8563 (patch) | |
| tree | e5ecb8d1d60d90ad1a87adcb3f0232294fd9ad73 /board/snow | |
| parent | bb27b96f13541f8df5fd8c210a619705c2c24d26 (diff) | |
| download | chrome-ec-1bedd55970387fd019c5a6fd368b1576606e8563.tar.gz | |
Daisy/Snow: Drive power LED with PWM
This drives the power LED for Snow (PB3) using TIM2 in PWM mode.
Since timer setup and manipulation is STM32-specific, the power LED
logic moved to to chip/stm32/power_led.c.
This also adds a "powerled" console command for testing.
Signed-off-by: David Hendricks <dhendrix@chromium.org>
BUG=chrome-os-partner:10647
TEST=Tested on Snow with powerled command, compiled for Daisy
Change-Id: I5a7dc20d201ea058767e3e76d54e7c8567a3b83c
Reviewed-on: https://gerrit.chromium.org/gerrit/26267
Commit-Ready: David Hendricks <dhendrix@chromium.org>
Reviewed-by: David Hendricks <dhendrix@chromium.org>
Tested-by: David Hendricks <dhendrix@chromium.org>
Diffstat (limited to 'board/snow')
| -rw-r--r-- | board/snow/board.c | 10 | ||||
| -rw-r--r-- | board/snow/board.h | 1 |
2 files changed, 9 insertions, 2 deletions
diff --git a/board/snow/board.c b/board/snow/board.c index b536ff3eda..4c9e30bd4b 100644 --- a/board/snow/board.c +++ b/board/snow/board.c @@ -56,7 +56,6 @@ const struct gpio_info gpio_list[GPIO_COUNT] = { {"PMIC_PWRON_L",GPIO_A, (1<<12), GPIO_OUT_HIGH, NULL}, {"ENTERING_RW", GPIO_D, (1<<0), GPIO_OUT_LOW, NULL}, {"CHARGER_EN", GPIO_B, (1<<2), GPIO_OUT_LOW, NULL}, - {"POWER_LED_L", GPIO_B, (1<<3), GPIO_OUT_HIGH, NULL}, {"EC_INT", GPIO_B, (1<<9), GPIO_HI_Z, NULL}, {"CODEC_INT", GPIO_D, (1<<1), GPIO_HI_Z, NULL}, {"KB_OUT00", GPIO_B, (1<<0), GPIO_KB_OUTPUT, NULL}, @@ -130,6 +129,15 @@ void configure_board(void) STM32_GPIO_AFIO_MAPR = (STM32_GPIO_AFIO_MAPR & ~(0x7 << 24)) | (2 << 24); + /* remap TIM2_CH2 to PB3 */ + STM32_GPIO_AFIO_MAPR = (STM32_GPIO_AFIO_MAPR & ~(0x3 << 8)) + | (1 << 8); + + /* set power LED to alternate function to be driven by TIM2/PWM */ + val = STM32_GPIO_CRL_OFF(GPIO_B) & ~0x0000f000; + val |= 0x00009000; + STM32_GPIO_CRL_OFF(GPIO_B) = val; + /* * I2C SCL/SDA on PB10-11 and PB6-7, bi-directional, no pull-up/down, * initialized as hi-Z until alt. function is set diff --git a/board/snow/board.h b/board/snow/board.h index 15db5a64d7..c78a30f574 100644 --- a/board/snow/board.h +++ b/board/snow/board.h @@ -79,7 +79,6 @@ enum gpio_signal { GPIO_PMIC_PWRON_L, /* 5v rail ready */ GPIO_EC_ENTERING_RW, /* EC is R/W mode for the kbc mux */ GPIO_CHARGER_EN, - GPIO_POWER_LED_L, /* Power state keyboard LED */ GPIO_EC_INT, GPIO_CODEC_INT, /* To audio codec (KB noise cancellation) */ GPIO_KB_OUT00, |