[S] Change in coreboot[main]: mb/google/brox/var/lotso: Fix goodix touchscreen power off sequence ...

[Kun Liu (Code Review)]

Kun Liu has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/84412?usp=email )

Change subject: mb/google/brox/var/lotso: Fix goodix touchscreen power off sequence  Power off does not seem to use the ACPI _OFF function, but rather the smihandler.  Creating variant_smi_sleep function for nami to handle the power off sequence during reboot/power off.  BUG=b:364193909 TEST=emerge-brox coreboot
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mb/google/brox/var/lotso: Fix goodix touchscreen power off sequence

Power off does not seem to use the ACPI _OFF function, but rather the
smihandler.  Creating variant_smi_sleep function for nami to handle
the power off sequence during reboot/power off.

BUG=b:364193909
TEST=emerge-brox coreboot

Change-Id: I0108be4e5e7c0265aae0f16fd4e2b7cbe5936112
Signed-off-by: Kun Liu 
---
M src/mainboard/google/brox/smihandler.c
M src/mainboard/google/brox/variants/baseboard/include/baseboard/variants.h
M src/mainboard/google/brox/variants/lotso/Makefile.mk
A src/mainboard/google/brox/variants/lotso/smihandler.c
4 files changed, 32 insertions(+), 1 deletion(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/12/84412/1

diff --git a/src/mainboard/google/brox/smihandler.c b/src/mainboard/google/brox/smihandler.c
index 9208d51..2dee327 100644
--- a/src/mainboard/google/brox/smihandler.c
+++ b/src/mainboard/google/brox/smihandler.c
@@ -4,11 +4,14 @@
 #include <ec/google/chromeec/ec.h>
 #include <ec/google/chromeec/smm.h>
 #include <elog.h>
+#include <baseboard/variants.h>
 #include <intelblocks/smihandler.h>
 #include <variant/ec.h>

+void __weak variant_smi_sleep(u8 slp_typ) {}
 void mainboard_smi_sleep(u8 slp_typ)
 {
+	variant_smi_sleep(slp_typ);
    chromeec_smi_sleep(slp_typ, MAINBOARD_EC_S3_WAKE_EVENTS, MAINBOARD_EC_S5_WAKE_EVENTS);
 }

diff --git a/src/mainboard/google/brox/variants/baseboard/include/baseboard/variants.h b/src/mainboard/google/brox/variants/baseboard/include/baseboard/variants.h
index ad8eb05..a6d1461 100644
--- a/src/mainboard/google/brox/variants/baseboard/include/baseboard/variants.h
+++ b/src/mainboard/google/brox/variants/baseboard/include/baseboard/variants.h
@@ -25,7 +25,7 @@
 void variant_update_soc_chip_config(struct soc_intel_alderlake_config *config);
 void variant_fill_ssdt(const struct device *dev);
 void variant_configure_pads(void);
-
+void variant_smi_sleep(u8 slp_typ);
 enum s0ix_entry {
    S0IX_EXIT,
    S0IX_ENTRY,
diff --git a/src/mainboard/google/brox/variants/lotso/Makefile.mk b/src/mainboard/google/brox/variants/lotso/Makefile.mk
index c88fed9..6ea63ef 100644
--- a/src/mainboard/google/brox/variants/lotso/Makefile.mk
+++ b/src/mainboard/google/brox/variants/lotso/Makefile.mk
@@ -5,3 +5,4 @@
 romstage-y += gpio.c
 ramstage-y += gpio.c
 ramstage-$(CONFIG_FW_CONFIG) += variant.c
+smm-y += smihandler.c
diff --git a/src/mainboard/google/brox/variants/lotso/smihandler.c b/src/mainboard/google/brox/variants/lotso/smihandler.c
new file mode 100644
index 0000000..40c6fdc
--- /dev/null
+++ b/src/mainboard/google/brox/variants/lotso/smihandler.c
@@ -0,0 +1,27 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <acpi/acpi.h>
+#include <baseboard/variants.h>
+#include <delay.h>
+
+#include "gpio.h"
+
+#define TOUCH_RESET           GPP_F17
+#define TOUCH_ENABLE          GPP_F7
+
+/*
+ * Elan touchscreen has higher delay requirements than the other
+ * devices, so using that.
+ */
+#define GOODIX_RESET_OFF_DELAY  5
+
+void variant_smi_sleep(u8 slp_typ)
+{
+	if (slp_typ == ACPI_S5) {
+		/* TOUCHSCREEN_RST# */
+		gpio_set(TOUCH_RESET, 0);
+		mdelay(GOODIX_RESET_OFF_DELAY);
+		/* EN_PP3300_DX_TOUCHSCREEN */
+		gpio_set(TOUCH_ENABLE, 0);
+	}
+}