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-rw-r--r--src/mainboard/google/octopus/variants/phaser/Makefile.inc1
-rw-r--r--src/mainboard/google/octopus/variants/phaser/variant.c73
2 files changed, 74 insertions, 0 deletions
diff --git a/src/mainboard/google/octopus/variants/phaser/Makefile.inc b/src/mainboard/google/octopus/variants/phaser/Makefile.inc
new file mode 100644
index 0000000000..1644083954
--- /dev/null
+++ b/src/mainboard/google/octopus/variants/phaser/Makefile.inc
@@ -0,0 +1 @@
+ramstage-y += variant.c
diff --git a/src/mainboard/google/octopus/variants/phaser/variant.c b/src/mainboard/google/octopus/variants/phaser/variant.c
new file mode 100644
index 0000000000..1ead5e230c
--- /dev/null
+++ b/src/mainboard/google/octopus/variants/phaser/variant.c
@@ -0,0 +1,73 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2018 Google LLC.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <arch/acpi_device.h>
+#include <baseboard/variants.h>
+#include <boardid.h>
+#include <device/device.h>
+#include <drivers/i2c/generic/chip.h>
+#include <drivers/i2c/hid/chip.h>
+#include <soc/gpio.h>
+#include <soc/pci_devs.h>
+#include <string.h>
+
+extern struct chip_operations drivers_i2c_generic_ops;
+extern struct chip_operations drivers_i2c_hid_ops;
+
+void variant_update_devtree(struct device *dev)
+{
+ uint32_t bid;
+ struct device *touchscreen_i2c_host;
+ struct device *child;
+ const struct bus *children_bus;
+ static const struct acpi_gpio new_enable_gpio =
+ ACPI_GPIO_OUTPUT_ACTIVE_HIGH(GPIO_146);
+
+ bid = board_id();
+
+ /* Nothing to update. */
+ if (bid == UNDEFINED_STRAPPING_ID || bid < 1)
+ return;
+
+ touchscreen_i2c_host = dev_find_slot(0, PCH_DEVFN_I2C7);
+
+ if (touchscreen_i2c_host == NULL)
+ return;
+
+ children_bus = touchscreen_i2c_host->link_list;
+ child = NULL;
+
+ /* Find all children on bus to update touchscreen enable gpio. */
+ while ((child = dev_bus_each_child(children_bus, child)) != NULL) {
+ struct drivers_i2c_generic_config *cfg;
+
+ /* No configration to change. */
+ if (child->chip_info == NULL)
+ continue;
+
+ if (child->chip_ops == &drivers_i2c_generic_ops)
+ cfg = child->chip_info;
+ else if (child->chip_ops == &drivers_i2c_hid_ops) {
+ struct drivers_i2c_hid_config *hid_cfg;
+ hid_cfg = child->chip_info;
+ cfg = &hid_cfg->generic;
+ } else
+ continue;
+
+ /* Update the enable gpio. */
+ memcpy(&cfg->enable_gpio, &new_enable_gpio,
+ sizeof(new_enable_gpio));
+ }
+}