1 files changed, 67 insertions, 0 deletions
diff --git a/zephyr/projects/brya/kblight_hooks.c b/zephyr/projects/brya/kblight_hooks.c
new file mode 100644
index 0000000000..d6d795f28e
--- /dev/null
+++ b/zephyr/projects/brya/kblight_hooks.c
@@ -0,0 +1,67 @@
+/* Copyright 2022 The ChromiumOS Authors
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include <zephyr/drivers/gpio.h>
+#include <stdbool.h>
+
+#include <ap_power/ap_power.h>
+#include "cbi.h"
+#include "hooks.h"
+
+/* Enable/Disable keyboard backlight gpio */
+static inline void kbd_backlight_enable(bool enable)
+{
+	if (get_board_id() == 1)
+		gpio_pin_set_dt(GPIO_DT_FROM_NODELABEL(gpio_id_1_ec_kb_bl_en),
+				enable);
+	else
+		gpio_pin_set_dt(GPIO_DT_FROM_NODELABEL(gpio_ec_kb_bl_en_l),
+				!enable);
+}
+
+static void board_backlight_handler(struct ap_power_ev_callback *cb,
+				    struct ap_power_ev_data data)
+{
+	bool enable;
+
+	switch (data.event) {
+	default:
+		return;
+
+	case AP_POWER_RESUME:
+		/* Called on AP S3 -> S0 transition */
+		enable = true;
+		break;
+
+	case AP_POWER_SUSPEND:
+		/* Called on AP S0 -> S3 transition */
+		enable = false;
+		break;
+	}
+	kbd_backlight_enable(enable);
+}
+
+/*
+ * Explicitly apply the board ID 1 *gpio.inc settings to pins that
+ * were reassigned on current boards.
+ */
+static void set_board_id_1_gpios(void)
+{
+	static struct ap_power_ev_callback cb;
+
+	/*
+	 * Add a callback for suspend/resume to
+	 * control the keyboard backlight.
+	 */
+	ap_power_ev_init_callback(&cb, board_backlight_handler,
+				  AP_POWER_RESUME | AP_POWER_SUSPEND);
+	ap_power_ev_add_callback(&cb);
+
+	if (get_board_id() != 1)
+		return;
+	gpio_pin_configure_dt(GPIO_DT_FROM_NODELABEL(gpio_id_1_ec_kb_bl_en),
+			      GPIO_OUTPUT_LOW);
+}
+DECLARE_HOOK(HOOK_INIT, set_board_id_1_gpios, HOOK_PRIO_FIRST);