commit d44e08ad9f183f0ed92fb35ed52e92baf5022f37
author Subrata Banik <subratabanik@google.com> Fri Jun 30 22:47:34 2023 -0700
committer Subrata Banik <subratabanik@google.com> Sun Jul 02 22:31:41 2023 +0000
tree 062a72bf133e8c76a3c4585a1eaa7d1bf496ac3c
parent 9d8baea15cbbda7376b82909493f3f96c1f49089

mb/google/rex/var/ovis: Enable LAN0

This patch performs below operations to enable LAN0.
  - Complete the LAN PEREST power sequencing
  - Program the SRC_CLKREQ (GPP_D20) with correctly.
  - Add overridetree.cb entry to configure the LAN0 device.

BUG=b:289395519
TEST=Able to boot google/ovis with LAN0 being enabled.

Change-Id: I91b0a76395ade4459cf8705c333728a71f95df14
Signed-off-by: Subrata Banik <subratabanik@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/76213
Reviewed-by: Kapil Porwal <kapilporwal@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/mainboard/google/rex/variants/ovis/gpio.c

diff --git a/src/mainboard/google/rex/variants/ovis/gpio.c b/src/mainboard/google/rex/variants/ovis/gpio.c
index 6c1794d..b86307f 100644
--- a/src/mainboard/google/rex/variants/ovis/gpio.c
+++ b/src/mainboard/google/rex/variants/ovis/gpio.c
@@ -188,8 +188,8 @@
 	PAD_CFG_GPI_APIC_LOCK(GPP_D18, NONE, LEVEL, INVERT, LOCK_CONFIG),
 	/* GPP_D19 : [] ==> SSD_CLKREQ_ODL */
 	PAD_CFG_NF(GPP_D19, NONE, DEEP, NF1),
-	/* GPP_D20 : [] ==> EN_LAN_RAILS */
-	PAD_NC(GPP_D20, NONE),
+	/* GPP_D20 : [] ==> LAN_CLKREQ_ODL */
+	PAD_CFG_NF(GPP_D20, NONE, DEEP, NF1),
 	/* GPP_D21 : [] ==> WLAN_CLKREQ_ODL */
 	PAD_CFG_NF(GPP_D21, NONE, DEEP, NF2),
 	/* GPP_D22 : [] ==> NC */
@@ -398,6 +398,9 @@
 	/* GPP_A20 : [] ==> SSD_PERST_L */
 	PAD_CFG_GPO(GPP_A20, 0, DEEP),
 
+	/* GPP_C13 : [] ==> LAN_PERST_L */
+	PAD_CFG_GPO(GPP_C13, 0, DEEP),
+
 	/* GPP_H10 : [] ==> SOC_WP_OD */
 	PAD_CFG_GPI_GPIO_DRIVER_LOCK(GPP_H10, NONE, LOCK_CONFIG),
 
@@ -406,6 +409,8 @@
 };
 
 static const struct pad_config romstage_gpio_table[] = {
+	/* GPP_C13 : [] ==> LAN_PERST_L */
+	PAD_CFG_GPO(GPP_C13, 0, DEEP),
 	/* A20 : [] ==> SSD_PERST_L */
 	PAD_CFG_GPO(GPP_A20, 0, DEEP),
 	/* GPP_D02 : [] ==> SD_PERST_L */