[XS] Change in coreboot[main]: mb/google/rex: Configure ISH UART TX/RX as NC

[Subrata Banik (Code Review)]

Subrata Banik has submitted this change. ( https://review.coreboot.org/c/coreboot/+/78049?usp=email )

Change subject: mb/google/rex: Configure ISH UART TX/RX as NC
......................................................................

mb/google/rex: Configure ISH UART TX/RX as NC

This patch reverses ISH UART pin configuration to allow ISH to enter
into suspend mode. This UART port is for debugging purposes.

BUG=b:302612549
TEST=On Google/rex platform with ISH enabled, do suspend_stress_test
     This test must pass

Signed-off-by: Bernardo Perez Priego 
Change-Id: I8aba45420744a3990e1f9637c3b31ea2e0f78f87
Reviewed-on: https://review.coreboot.org/c/coreboot/+/78049
Reviewed-by: Tanu Malhotra 
Tested-by: build bot (Jenkins) 
Reviewed-by: Kapil Porwal 
Reviewed-by: Subrata Banik 
---
M src/mainboard/google/rex/variants/rex0/fw_config.c
1 file changed, 0 insertions(+), 4 deletions(-)

Approvals:
  build bot (Jenkins): Verified
  Subrata Banik: Looks good to me, approved
  Tanu Malhotra: Looks good to me, but someone else must approve
  Kapil Porwal: Looks good to me, approved

diff --git a/src/mainboard/google/rex/variants/rex0/fw_config.c b/src/mainboard/google/rex/variants/rex0/fw_config.c
index cea55ec..35a4fd9 100644
--- a/src/mainboard/google/rex/variants/rex0/fw_config.c
+++ b/src/mainboard/google/rex/variants/rex0/fw_config.c
@@ -88,10 +88,6 @@
    PAD_CFG_NF_IOSTANDBY_IGNORE(GPP_B02, NONE, DEEP, NF3),
    /* GPP_B03 : ISH_I2C0_SCL */
    PAD_CFG_NF_IOSTANDBY_IGNORE(GPP_B03, NONE, DEEP, NF3),
-	/* GPP_D05 : ISH_UART_TX */
-	PAD_CFG_NF(GPP_D05, NONE, DEEP, NF2),
-	/* GPP_D06 : ISH_UART_RX */
-	PAD_CFG_NF(GPP_D06, NONE, DEEP, NF2),
    /* GPP_B08 : ISH_GP3, SOC_ISH_ACCEL_INT_L */
    PAD_CFG_NF(GPP_B08, NONE, DEEP, NF4),
    /* GPP_E15 : ISH_GP5A, SOC_ISH_IMU_INT_L */