Change in coreboot[master]: mb/google/corsola: Support audio

[Rex-BC Chen (Code Review)]

Attention is currently required from: yu jiaxin.
Hello yu jiaxin,

I'd like you to do a code review. Please visit

https://review.coreboot.org/c/coreboot/+/60738

to review the following change.

Change subject: mb/google/corsola: Support audio
......................................................................

mb/google/corsola: Support audio

Turn on setting of audio power and select I2S pin-mux.

BUG=b:204164695
TEST=Verified by CLI command(badusbbeep/devbeep) on kingler and krabby

Signed-off-by: Jiaxin Yu 
Change-Id: Ia6374d0e5535b7cff4df8759312786fef8b94b6b
---
M src/mainboard/google/corsola/mainboard.c
1 file changed, 14 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/38/60738/1

diff --git a/src/mainboard/google/corsola/mainboard.c b/src/mainboard/google/corsola/mainboard.c
index 910d8d6..747b507 100644
--- a/src/mainboard/google/corsola/mainboard.c
+++ b/src/mainboard/google/corsola/mainboard.c
@@ -24,6 +24,18 @@
    register_bl31_aux_param(&param_reset.h);
 }

+static void configure_audio(void)
+{
+        /* Power on audio */
+        mtcmos_audio_power_on();
+
+        /* Set up I2S */
+        gpio_set_mode(GPIO(I2S2_MCK), PAD_I2S2_MCK_FUNC_I2S2_MCK);
+        gpio_set_mode(GPIO(I2S2_BCK), PAD_I2S2_BCK_FUNC_I2S2_BCK);
+        gpio_set_mode(GPIO(I2S2_LRCK), PAD_I2S2_LRCK_FUNC_I2S2_LRCK);
+        gpio_set_mode(GPIO(EINT4), PAD_EINT4_FUNC_I2S3_DO);
+}
+
 static void mainboard_init(struct device *dev)
 {
    mtk_msdc_configure_emmc(true);
@@ -35,6 +47,8 @@

setup_usb_host();

+	configure_audio();
+
    if (spm_init())
    	printk(BIOS_ERR, "spm init failed, system suspend may not work\n");