[coreboot-gerrit] New patch to review for coreboot: 22c31e5 snow: Make coreboot set up pins for busses it knows are hooked up as such.

[Gabe Black]

Gabe Black ([e-mail]) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/3650

-gerrit

commit 22c31e5bf1e4a06b95b51415c7c9519e4aaf71fb
Author: Gabe Black 
Date:   Sat May 18 15:55:47 2013 -0700

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.

Change-Id: I1bb127c810e9ee077afc4227a6f316eaa53d6498
    Signed-off-by: Gabe Black 
---
 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 250b71f..2dd56fc 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);