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-rw-r--r--src/mainboard/google/gru/bootblock.c18
-rw-r--r--src/mainboard/google/gru/mainboard.c9
2 files changed, 6 insertions, 21 deletions
diff --git a/src/mainboard/google/gru/bootblock.c b/src/mainboard/google/gru/bootblock.c
index a18a61c101..0013414bf5 100644
--- a/src/mainboard/google/gru/bootblock.c
+++ b/src/mainboard/google/gru/bootblock.c
@@ -31,20 +31,10 @@
void bootblock_mainboard_early_init(void)
{
- /* Let gpio2ab io domains works at 1.8V.
- *
- * If io_vsel[0] == 0(default value), gpio2ab io domains is 3.0V
- * powerd by APIO2_VDD, otherwise, 1.8V supplied by APIO2_VDDPST.
- * But from the schematic of kevin rev0, the APIO2_VDD and
- * APIO2_VDDPST both are 1.8V(intentionally?).
- *
- * So, by default, CPU1_SDIO_PWREN(GPIO2_A2) can't output 3.0V
- * because the supply is 1.8V.
- * Let ask GPIO2_A2 output 1.8V to make GPIO interal logic happy.
- */
- write32(&rk3399_grf->io_vsel, RK_SETBITS(1 << 0));
-
- /* Scarlet-based gpio4cd iodomain is 1.8V */
+ /* Configure all programmable IO voltage domains (3D/4A and 2A/2B) early
+ so that we know we can use our GPIOs reliably in following code. */
+ write32(&rk3399_grf->io_vsel, RK_SETBITS(1 << 1 | 1 << 0));
+ /* On Scarlet-based boards, the 4C/4D domain is 1.8V (on others 3.0V) */
if (IS_ENABLED(CONFIG_GRU_BASEBOARD_SCARLET))
write32(&rk3399_grf->io_vsel, RK_SETBITS(1 << 3));
diff --git a/src/mainboard/google/gru/mainboard.c b/src/mainboard/google/gru/mainboard.c
index 9a241f59ad..1a24862184 100644
--- a/src/mainboard/google/gru/mainboard.c
+++ b/src/mainboard/google/gru/mainboard.c
@@ -218,18 +218,13 @@ static void configure_codec(void)
gpio_input(GPIO(3, D, 1)); /* I2S0_RX remove pull-up */
gpio_input(GPIO(3, D, 2)); /* I2S0_TX remove pull-up */
gpio_input(GPIO(3, D, 3)); /* I2S0_SDI0 remove pull-up */
- gpio_input(GPIO(3, D, 4)); /* I2S0_SDI1 remove pull-up */
- /* GPIO3_D5 (I2S0_SDI2SDO2) not connected */
- gpio_input(GPIO(3, D, 6)); /* I2S0_SDO1 remove pull-up */
+ /* GPIOs 3_D4 - 3_D6 not used for I2S and are SKU ID pins on Scarlet. */
gpio_input(GPIO(3, D, 7)); /* I2S0_SDO0 remove pull-up */
gpio_input(GPIO(4, A, 0)); /* I2S0_MCLK remove pull-up */
- write32(&rk3399_grf->iomux_i2s0, IOMUX_I2S0);
+ write32(&rk3399_grf->iomux_i2s0, IOMUX_I2S0_SD0);
write32(&rk3399_grf->iomux_i2sclk, IOMUX_I2SCLK);
- /* AUDIO IO domain 1.8V voltage selection */
- write32(&rk3399_grf->io_vsel, RK_SETBITS(1 << 1));
-
if (!IS_ENABLED(CONFIG_GRU_BASEBOARD_SCARLET))
gpio_output(GPIO_P18V_AUDIO_PWREN, 1);
gpio_output(GPIO_SPK_PA_EN, 0);