[S] Change in coreboot[main]: mb/google/fatcat/var/fatcat: Refactor GPIO programming for UFS support

[Subrata Banik (Code Review)]

Subrata Banik has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/85958?usp=email )

Change subject: mb/google/fatcat/var/fatcat: Refactor GPIO programming for UFS support
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mb/google/fatcat/var/fatcat: Refactor GPIO programming for UFS support

Refactor GPIO programming to support UFS storage on the fatcat
platform.

- Add pad configurations for UFS in `fw_config.c`.
- Update `fw_config_configure_pre_mem_gpio()` and
  `fw_config_gpio_padbased_override()` to include UFS support.
- Remove redundant UFS pad configuration from `gpio.c`.

TEST=Able to build and boot from UFS device on google/fatcat.

Change-Id: I09331d75501977d89592d1a70d5b0dca271f8747
Signed-off-by: Subrata Banik 
---
M src/mainboard/google/fatcat/variants/fatcat/fw_config.c
M src/mainboard/google/fatcat/variants/fatcat/gpio.c
2 files changed, 10 insertions(+), 8 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/58/85958/1

diff --git a/src/mainboard/google/fatcat/variants/fatcat/fw_config.c b/src/mainboard/google/fatcat/variants/fatcat/fw_config.c
index ac2155f..0ba6048 100644
--- a/src/mainboard/google/fatcat/variants/fatcat/fw_config.c
+++ b/src/mainboard/google/fatcat/variants/fatcat/fw_config.c
@@ -210,6 +210,11 @@
    PAD_CFG_GPO(GPP_B09, 1, PLTRST),
 };

+static const struct pad_config ufs_enable_pads[] = {
+	/* GPP_D21:     GPP_D21_UFS_REFCLK */
+	PAD_CFG_NF(GPP_D21, NONE, DEEP, NF1),
+};
+
 /* Gen5 NVME: at the bottom M.2 slot */
 static const struct pad_config pre_mem_gen5_ssd_pwr_pads[] = {
    /* GPP_B16:     GEN5_SSD_PWREN */
@@ -484,12 +489,9 @@
    	GPIO_CONFIGURE_PADS(pre_mem_gen4_ssd_pwr_pads);
    } else if (fw_config_probe(FW_CONFIG(STORAGE, STORAGE_NVME_GEN5))) {
    	GPIO_CONFIGURE_PADS(pre_mem_gen5_ssd_pwr_pads);
-	/* TODO: else if (fw_config_probe(FW_CONFIG(STORAGE, STORAGE_UFS)))
-	 */
    } else if (fw_config_probe(FW_CONFIG(STORAGE, STORAGE_UNKNOWN))) {
    	GPIO_CONFIGURE_PADS(pre_mem_gen4_ssd_pwr_pads);
    	GPIO_CONFIGURE_PADS(pre_mem_gen5_ssd_pwr_pads);
-		/* TODO for UFS */
    }

if (!fw_config_probe(FW_CONFIG(SD, SD_NONE)))
@@ -524,12 +526,12 @@
    	GPIO_PADBASED_OVERRIDE(padbased_table, gen4_ssd_pads);
    } else if (fw_config_probe(FW_CONFIG(STORAGE, STORAGE_NVME_GEN5))) {
    	GPIO_PADBASED_OVERRIDE(padbased_table, gen5_ssd_pads);
-	/* TODO: else if (fw_config_probe(FW_CONFIG(STORAGE, STORAGE_UFS)))
-	 */
+	} else if (fw_config_probe(FW_CONFIG(STORAGE, STORAGE_UFS))) {
+		GPIO_PADBASED_OVERRIDE(padbased_table, ufs_enable_pads);
    } else if (fw_config_probe(FW_CONFIG(STORAGE, STORAGE_UNKNOWN))) {
    	GPIO_PADBASED_OVERRIDE(padbased_table, gen4_ssd_pads);
    	GPIO_PADBASED_OVERRIDE(padbased_table, gen5_ssd_pads);
-		/* TODO for UFS */
+		GPIO_PADBASED_OVERRIDE(padbased_table, ufs_enable_pads);
    }

if (fw_config_probe(FW_CONFIG(AUDIO, AUDIO_NONE)))
diff --git a/src/mainboard/google/fatcat/variants/fatcat/gpio.c b/src/mainboard/google/fatcat/variants/fatcat/gpio.c
index d6fea09..cf1e040 100644
--- a/src/mainboard/google/fatcat/variants/fatcat/gpio.c
+++ b/src/mainboard/google/fatcat/variants/fatcat/gpio.c
@@ -175,8 +175,8 @@
    PAD_CFG_NF(GPP_D18, NONE, DEEP, NF1),
    /* GPP_D20:     CSE_EARLY_SW */
    PAD_CFG_GPI_SCI_HIGH(GPP_D20, NONE, DEEP, LEVEL),
-	/* GPP_D21:     GPP_D21_UFS_REFCLK */
-	PAD_CFG_NF(GPP_D21, NONE, DEEP, NF1),
+	/* GPP_D21:     NC */
+	PAD_NC(GPP_D21, NONE),
    /* GPP_D22:     BPKI3C_SDA */
    PAD_CFG_NF(GPP_D22, NONE, DEEP, NF1),
    /* GPP_D23:     BPKI3C_SCL */