[XS] Change in coreboot[main]: mb/google/rex: Fix ISH I2C pad for suspend

[Subrata Banik (Code Review)]

Subrata Banik has submitted this change. ( https://review.coreboot.org/c/coreboot/+/78179?usp=email )

(

1 is the latest approved patch-set.
No files were changed between the latest approved patch-set and the submitted one.
 )Change subject: mb/google/rex: Fix ISH I2C pad for suspend
......................................................................

mb/google/rex: Fix ISH I2C pad for suspend

During suspend, the ISH I2C transactions cannot go through
because the GPIO pads remain the pervious value.
The IO Standby State (IOSSTATE) needs to be changed to keep I2C bus
active and functional during suspend.

BUG=b:302612549
TEST=on Google/rex platform with ISH enabled, do suspend_stress_test
and check that no i2c failure.

Signed-off-by: Cliff Huang 
Change-Id: I9a2c902ed56461f3a535428db399c2050756f2da
Reviewed-on: https://review.coreboot.org/c/coreboot/+/78179
Reviewed-by: Subrata Banik 
Reviewed-by: Li1 Feng 
Tested-by: build bot (Jenkins) 
---
M src/mainboard/google/rex/variants/rex0/fw_config.c
1 file changed, 2 insertions(+), 2 deletions(-)

Approvals:
  Li1 Feng: Looks good to me, but someone else must approve
  build bot (Jenkins): Verified
  Subrata Banik: 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 86cb781..cea55ec 100644
--- a/src/mainboard/google/rex/variants/rex0/fw_config.c
+++ b/src/mainboard/google/rex/variants/rex0/fw_config.c
@@ -85,9 +85,9 @@

static const struct pad_config ish_enable_pads[] = {
    /* GPP_B02 : ISH I2C0_SDA */
-	PAD_CFG_NF(GPP_B02, NONE, DEEP, NF3),
+	PAD_CFG_NF_IOSTANDBY_IGNORE(GPP_B02, NONE, DEEP, NF3),
    /* GPP_B03 : ISH_I2C0_SCL */
-	PAD_CFG_NF(GPP_B03, NONE, DEEP, NF3),
+	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 */