Change in coreboot[master]: mb/google/corsola: Add NOR-Flash support

[Rex-BC Chen (Code Review)]

Rex-BC Chen has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/58838 )

Change subject: mb/google/corsola: Add NOR-Flash support
......................................................................

mb/google/corsola: Add NOR-Flash support

Add NOR-Flash drivers to pass verification of flash at verstage.

TEST=boot to romstage
BUG=b:202871018

Signed-off-by: Rex-BC Chen 
Change-Id: Iee3dd336632b0cf998f5f7c1d118e01e8270e815
---
M src/mainboard/google/corsola/Kconfig
M src/mainboard/google/corsola/bootblock.c
2 files changed, 31 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/38/58838/1

diff --git a/src/mainboard/google/corsola/Kconfig b/src/mainboard/google/corsola/Kconfig
index 8b38d2b..bfdc8ee 100644
--- a/src/mainboard/google/corsola/Kconfig
+++ b/src/mainboard/google/corsola/Kconfig
@@ -22,4 +22,8 @@
 config MAINBOARD_PART_NUMBER
    string
    default "Corsola" if BOARD_GOOGLE_CORSOLA
+
+config BOOT_DEVICE_SPI_FLASH_BUS
+	int
+	default 7
 endif
diff --git a/src/mainboard/google/corsola/bootblock.c b/src/mainboard/google/corsola/bootblock.c
index 99947c0..81af529 100644
--- a/src/mainboard/google/corsola/bootblock.c
+++ b/src/mainboard/google/corsola/bootblock.c
@@ -2,7 +2,34 @@

#include <bootblock_common.h>
 #include <device/mmio.h>
+#include <soc/gpio.h>

+struct pad_func {
+	gpio_t gpio;
+	u8 func;
+};
+
+#define PAD_FUNC(name, func) {GPIO(name), PAD_##name##_FUNC_##func}
+
+static void nor_set_gpio_pinmux(void)
+{
+	const struct pad_func *ptr = NULL;
+
+	/* GPIO 36 ~ 39 */
+	struct pad_func nor_pinmux[] = {
+		PAD_FUNC(SPI0_CLK, SPINOR_CK),
+		PAD_FUNC(SPI0_CSB, SPINOR_CS),
+		PAD_FUNC(SPI0_MO, SPINOR_IO0),
+		PAD_FUNC(SPI0_MI, SPINOR_IO1),
+	};
+
+	ptr = nor_pinmux;
+	for (size_t i = 0; i < ARRAY_SIZE(nor_pinmux); i++) {
+		gpio_set_pull(nor_pinmux[i].gpio, GPIO_PULL_ENABLE, GPIO_PULL_UP);
+		gpio_set_mode(nor_pinmux[i].gpio, ptr[i].func);
+	}
+}
 void bootblock_mainboard_init(void)
 {
+	nor_set_gpio_pinmux();
 }