1 files changed, 50 insertions, 1 deletions
diff --git a/board/volteer/board.c b/board/volteer/board.c
index dc81ada7d5..4f0e0ef6be 100644
--- a/board/volteer/board.c
+++ b/board/volteer/board.c
@@ -21,6 +21,8 @@
 #include "lid_switch.h"
 #include "power.h"
 #include "power_button.h"
+#include "pwm.h"
+#include "pwm_chip.h"
 #include "switch.h"
 #include "system.h"
 #include "task.h"
@@ -56,7 +58,9 @@ __override void config_volteer_gpios(void)
 
 static void board_init(void)
 {
-	/* TODO */
+	/* Illuminate motherboard and daughter board LEDs equally to start. */
+	pwm_enable(PWM_CH_LED4_SIDESEL, 1);
+	pwm_set_duty(PWM_CH_LED4_SIDESEL, 50);
 }
 DECLARE_HOOK(HOOK_INIT, board_init, HOOK_PRIO_DEFAULT);
 
@@ -174,3 +178,48 @@ const struct i2c_port_t i2c_ports[] = {
 	},
 };
 const unsigned int i2c_ports_used = ARRAY_SIZE(i2c_ports);
+
+/******************************************************************************/
+/* PWM configuration */
+const struct pwm_t pwm_channels[] = {
+	[PWM_CH_LED1_BLUE] = {
+		.channel = 2,
+		.flags = PWM_CONFIG_ACTIVE_LOW | PWM_CONFIG_DSLEEP,
+		.freq = 2400,
+	},
+	[PWM_CH_LED2_GREEN] = {
+		.channel = 0,
+		.flags = PWM_CONFIG_ACTIVE_LOW | PWM_CONFIG_DSLEEP,
+		.freq = 2400,
+	},
+	[PWM_CH_LED3_RED] = {
+		.channel = 1,
+		.flags = PWM_CONFIG_ACTIVE_LOW | PWM_CONFIG_DSLEEP,
+		.freq = 2400,
+	},
+	[PWM_CH_LED4_SIDESEL] = {
+		.channel = 7,
+		.flags = PWM_CONFIG_ACTIVE_LOW | PWM_CONFIG_DSLEEP,
+		/* Run at a higher frequency than the color PWM signals to avoid
+		 * timing-based color shifts.
+		 */
+		.freq = 4800,
+	},
+	[PWM_CH_FAN] = {
+		.channel = 5,
+		.flags = PWM_CONFIG_OPEN_DRAIN,
+		.freq = 25000
+	},
+	[PWM_CH_KBLIGHT] = {
+		.channel = 3,
+		.flags = 0,
+		/*
+		 * Set PWM frequency to multiple of 50 Hz and 60 Hz to prevent
+		 * flicker. Higher frequencies consume similar average power to
+		 * lower PWM frequencies, but higher frequencies record a much
+		 * lower maximum power.
+		 */
+		.freq = 2400,
+	},
+};
+BUILD_ASSERT(ARRAY_SIZE(pwm_channels) == PWM_CH_COUNT);