[M] Change in coreboot[master]: mb/google/brya/variants/marasov: Disable touch panel power for non-to...

[Frank Chu (Code Review)]

Frank Chu has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/71691 )

Change subject: mb/google/brya/variants/marasov: Disable touch panel power for non-touch sku
......................................................................

mb/google/brya/variants/marasov: Disable touch panel power for non-touch sku

Disable touch panel power for non-touch sku by fw_config
TOUCH field.

BUG=b:263452842
BRANCH=firmware-brya-14505.B
TEST=emerge-brya coreboot chromeos-bootimage

Signed-off-by: Frank Chu 
Change-Id: I4736f94481512806377b733b26fdc7290046c555
---
M src/mainboard/google/brya/variants/marasov/Makefile.inc
A src/mainboard/google/brya/variants/marasov/fw_config.c
M src/mainboard/google/brya/variants/marasov/overridetree.cb
3 files changed, 53 insertions(+), 1 deletion(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/91/71691/1

diff --git a/src/mainboard/google/brya/variants/marasov/Makefile.inc b/src/mainboard/google/brya/variants/marasov/Makefile.inc
index 139345f..4d25f34e 100644
--- a/src/mainboard/google/brya/variants/marasov/Makefile.inc
+++ b/src/mainboard/google/brya/variants/marasov/Makefile.inc
@@ -2,6 +2,7 @@
 bootblock-y += gpio.c

romstage-y += gpio.c
+ramstage-$(CONFIG_FW_CONFIG) += fw_config.c

romstage-y += memory.c

diff --git a/src/mainboard/google/brya/variants/marasov/fw_config.c b/src/mainboard/google/brya/variants/marasov/fw_config.c
new file mode 100644
index 0000000..4e923c8
--- /dev/null
+++ b/src/mainboard/google/brya/variants/marasov/fw_config.c
@@ -0,0 +1,28 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <bootstate.h>
+#include <console/console.h>
+#include <fw_config.h>
+#include <gpio.h>
+
+static const struct pad_config touch_enable_pads[] = {
+	/* C0  : SMBCLK ==> EN_PP3300_TCHSCR */
+	PAD_CFG_GPO(GPP_C0, 1, DEEP),
+};
+
+static const struct pad_config touch_disable_pads[] = {
+	/* C0  : SMBCLK ==> NC */
+	PAD_NC(GPP_C0, NONE),
+};
+
+static void fw_config_handle(void *unused)
+{
+	if (fw_config_probe(FW_CONFIG(TOUCH, TOUCH_ELAN0001))) {
+		printk(BIOS_INFO, "Configure Touch GPIO GPP_C0 to GPO_H.\n");
+		gpio_configure_pads(touch_enable_pads, ARRAY_SIZE(touch_enable_pads));
+	} else if (fw_config_probe(FW_CONFIG(TOUCH, TOUCH_NONE))) {
+		printk(BIOS_INFO, "Configure Touch GPIO GPP_C0 to NC.\n");
+		gpio_configure_pads(touch_disable_pads, ARRAY_SIZE(touch_disable_pads));
+	}
+}
+BOOT_STATE_INIT_ENTRY(BS_DEV_ENABLE, BS_ON_ENTRY, fw_config_handle, NULL);
diff --git a/src/mainboard/google/brya/variants/marasov/overridetree.cb b/src/mainboard/google/brya/variants/marasov/overridetree.cb
index bf9d5e0..e90df9e 100644
--- a/src/mainboard/google/brya/variants/marasov/overridetree.cb
+++ b/src/mainboard/google/brya/variants/marasov/overridetree.cb
@@ -12,6 +12,10 @@
    	option UFC_USB				0
    	option UFC_MIPI				1
    end
+	field TOUCH 5 5
+		option TOUCH_NONE			0
+		option TOUCH_ELAN0001			1
+	end
    field STORAGE 30 31
    	option STORAGE_UNKNOWN			0
    	option STORAGE_NVME			1
@@ -163,7 +167,9 @@
    			register "stop_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_LOW(GPP_C6)"
    			register "stop_off_delay_ms" = "1"
    			register "has_power_resource" = "1"
-				device i2c 10 on end
+				device i2c 10 on
+					probe TOUCH TOUCH_ELAN0001
+				end
    		end
    	end #I2C3
    	device ref i2c5 on