mainboard/google/kahlee: Add hook for early wlan rst gpio init

Base on the grunt board schematic, gpio70 is an alternative way for wlan rst.
Add hook for variants to override default state.

BUG=b:154357210,b:154848243
BRANCH=master
TEST=emerge-grunt coreboot
Signed-off-by: Kevin Chiu <Kevin.Chiu@quantatw.com>
Change-Id: Ic3f1c016357dd5090e6adedf96e7593abff29a0c
Reviewed-on: https://review.coreboot.org/c/coreboot/+/40944
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Martin Roth <martinroth@google.com>

src/mainboard/google/kahlee/bootblock/bootblock.c

@@ -17,6 +17,9 @@ void bootblock_mainboard_early_init(void)
 	/* Enable the EC as soon as we have visibility */
 	mainboard_ec_init();
 
+	gpios = variant_wlan_rst_early_gpio_table(&num_gpios);
+	program_gpios(gpios, num_gpios);
+
 	gpios = variant_early_gpio_table(&num_gpios);
 	program_gpios(gpios, num_gpios);
 }

src/mainboard/google/kahlee/variants/baseboard/gpio.c

@@ -42,9 +42,6 @@ static const struct soc_amd_gpio gpio_set_stage_reset[] = {
 	/* GPIO_40 - EMMC_BRIDGE_RST */
 	PAD_GPO(GPIO_40, LOW),
 
-	/* GPIO_70 - WLAN_PE_RST_L */
-	PAD_GPO(GPIO_70, HIGH),
-
 	/* GPIO_74 - LPC_CLK0_EC_R */
 	PAD_NF(GPIO_74, LPCCLK0, PULL_DOWN),
 
@@ -77,6 +74,11 @@ static const struct soc_amd_gpio gpio_set_stage_reset[] = {
 	PAD_GPI(GPIO_142, PULL_NONE),
 };
 
+static const struct soc_amd_gpio gpio_wlan_rst_early_reset[] = {
+	/* GPIO_70 - WLAN_PE_RST_L */
+	PAD_GPO(GPIO_70, HIGH),
+};
+
 static const struct soc_amd_gpio gpio_set_stage_rom[] = {
 	/* GPIO_133 - APU_EDP_BKLTEN_L (backlight - Active LOW) */
 	PAD_GPO(GPIO_133, HIGH),
@@ -247,6 +249,13 @@ struct soc_amd_gpio *variant_early_gpio_table(size_t *size)
 	return gpio_set_stage_reset;
 }
 
+const __weak
+struct soc_amd_gpio *variant_wlan_rst_early_gpio_table(size_t *size)
+{
+	*size = ARRAY_SIZE(gpio_wlan_rst_early_reset);
+	return gpio_wlan_rst_early_reset;
+}
+
 const __weak
 struct soc_amd_gpio *variant_romstage_gpio_table(size_t *size)
 {

src/mainboard/google/kahlee/variants/baseboard/include/baseboard/variants.h

@@ -16,6 +16,7 @@ int variant_mainboard_read_spd(uint8_t spdAddress, char *buf, size_t len);
 int variant_get_xhci_oc_map(uint16_t *usb_oc_map);
 int variant_get_ehci_oc_map(uint16_t *usb_oc_map);
 const struct soc_amd_gpio *variant_early_gpio_table(size_t *size);
+const struct soc_amd_gpio *variant_wlan_rst_early_gpio_table(size_t *size);
 const struct soc_amd_gpio *variant_romstage_gpio_table(size_t *size);
 const struct soc_amd_gpio *variant_gpio_table(size_t *size);
 void variant_romstage_entry(int s3_resume);