From 3128756e834fb17a82f6837b3e6355fddef8bf2f Mon Sep 17 00:00:00 2001 From: Gabe Black Date: Sat, 18 May 2013 15:55:47 -0700 Subject: [PATCH] snow: Make coreboot set up pins for busses it knows are hooked up as such. Coreboot knows that, for the snow board, certain pins are to be connected to bus controllers in the SOC and to the wires of a bus external to the SOC. It can configure them as such and free its payload from having to know how to set everything up. BUG=None TEST=Built and booted on Snow. BRANCH=None Change-Id: Ia39cc5d0909f1be86dee828c0419bffa16edb69b Signed-off-by: Gabe Black Reviewed-on: https://gerrit.chromium.org/gerrit/55635 Commit-Queue: Stefan Reinauer Reviewed-by: Stefan Reinauer Tested-by: Stefan Reinauer --- src/mainboard/google/snow/mainboard.c | 28 +++++++++++++++++++++++++++ 1 file changed, 28 insertions(+) diff --git a/src/mainboard/google/snow/mainboard.c b/src/mainboard/google/snow/mainboard.c index 250b71fdee..2dd56fc17b 100644 --- a/src/mainboard/google/snow/mainboard.c +++ b/src/mainboard/google/snow/mainboard.c @@ -176,6 +176,32 @@ static void disable_usb30_pll(void) gpio_direction_output(usb3_pll_l, 0); } +static void gpio_init(void) +{ + /* Set up the I2C busses. */ + exynos_pinmux_config(PERIPH_ID_I2C0, PINMUX_FLAG_NONE); + exynos_pinmux_config(PERIPH_ID_I2C1, PINMUX_FLAG_NONE); + exynos_pinmux_config(PERIPH_ID_I2C2, PINMUX_FLAG_NONE); + exynos_pinmux_config(PERIPH_ID_I2C3, PINMUX_FLAG_NONE); + exynos_pinmux_config(PERIPH_ID_I2C4, PINMUX_FLAG_NONE); + exynos_pinmux_config(PERIPH_ID_I2C7, PINMUX_FLAG_NONE); + + /* Set up the GPIOs used to arbitrate for I2C bus 4. */ + gpio_set_pull(GPIO_F03, GPIO_PULL_NONE); + gpio_set_pull(GPIO_E04, GPIO_PULL_NONE); + gpio_direction_output(GPIO_F03, 1); + gpio_direction_input(GPIO_E04); + + /* Set up the GPIO used to enable the audio codec. */ + gpio_set_pull(GPIO_X17, GPIO_PULL_NONE); + gpio_set_pull(GPIO_X15, GPIO_PULL_NONE); + gpio_direction_output(GPIO_X17, 1); + gpio_direction_output(GPIO_X15, 1); + + /* Set up the I2S busses. */ + exynos_pinmux_config(PERIPH_ID_I2S1, PINMUX_FLAG_NONE); +} + /* this happens after cpu_init where exynos resources are set */ static void mainboard_init(device_t dev) { @@ -186,6 +212,8 @@ static void mainboard_init(device_t dev) }; void *fb_addr; + gpio_init(); + i2c_init(TPS69050_BUS, I2C_0_SPEED, I2C_SLAVE); i2c_init(7, I2C_0_SPEED, I2C_SLAVE);