atlas: enable charge status LEDs

this enables the charge status LEDs.  this is largely taken from the
nocturne config.  the color_map is tweaked to produce reasonable
colors on atlas - at least as a 1st order approximation.

BUG=b:110505328
BRANCH=none
TEST=verified LEDs on a reworked board.  color pattern is the same as
	nocturne.

Change-Id: I4be4847e7a7d41ab83df8ab173bb3dba83297212
Signed-off-by: Caveh Jalali <caveh@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/1111576
Commit-Ready: caveh jalali <caveh@chromium.org>
Tested-by: caveh jalali <caveh@chromium.org>
Reviewed-by: Aseda Aboagye <aaboagye@chromium.org>
Reviewed-by: caveh jalali <caveh@chromium.org>

4 files changed, 108 insertions, 9 deletions

diff --git a/board/atlas/board.c b/board/atlas/board.c
index 0d122f022e..5725e1f14e 100644
--- a/board/atlas/board.c
+++ b/board/atlas/board.c
@@ -95,11 +95,19 @@ struct keyboard_scan_config keyscan_config = {
 
 /* PWM channels. Must be in the exactly same order as in enum pwm_channel. */
 const struct pwm_t pwm_channels[] = {
-	[PWM_CH_KBLIGHT] = { 3, 0, 10000 },
-	[PWM_CH_LED1]    = { 0, PWM_CONFIG_DSLEEP, 100 },
-	[PWM_CH_LED2]    = { 2, PWM_CONFIG_DSLEEP, 100 },
-	[PWM_CH_LED3]    = { 6, PWM_CONFIG_DSLEEP, 100 },
-	[PWM_CH_LED4]    = { 1, PWM_CONFIG_DSLEEP, 100 },
+	[PWM_CH_KBLIGHT]       = { 3, 0, 10000 },
+	[PWM_CH_DB0_LED_BLUE]  = {
+		0, PWM_CONFIG_ACTIVE_LOW | PWM_CONFIG_DSLEEP, 2400 },
+	[PWM_CH_DB0_LED_RED]   = {
+		2, PWM_CONFIG_ACTIVE_LOW | PWM_CONFIG_DSLEEP, 2400 },
+	[PWM_CH_DB0_LED_GREEN] = {
+		6, PWM_CONFIG_ACTIVE_LOW | PWM_CONFIG_DSLEEP, 2400 },
+	[PWM_CH_DB1_LED_BLUE]  = {
+		1, PWM_CONFIG_ACTIVE_LOW | PWM_CONFIG_DSLEEP, 2400 },
+	[PWM_CH_DB1_LED_RED]   = {
+		7, PWM_CONFIG_ACTIVE_LOW | PWM_CONFIG_DSLEEP, 2400 },
+	[PWM_CH_DB1_LED_GREEN] = {
+		5, PWM_CONFIG_ACTIVE_LOW | PWM_CONFIG_DSLEEP, 2400 },
 };
 BUILD_ASSERT(ARRAY_SIZE(pwm_channels) == PWM_CH_COUNT);
 
diff --git a/board/atlas/board.h b/board/atlas/board.h
index ae290ca666..d4cca06959 100644
--- a/board/atlas/board.h
+++ b/board/atlas/board.h
@@ -100,6 +100,10 @@
 #define CONFIG_POWER_S0IX
 #define CONFIG_POWER_TRACK_HOST_SLEEP_STATE
 
+/* LEDs */
+#define CONFIG_LED_COMMON
+#define CONFIG_LED_PWM_COUNT 2
+
 /* Temperature Sensor */
 #define CONFIG_TEMP_SENSOR
 #define CONFIG_TEMP_SENSOR_BD99992GW
@@ -196,10 +200,12 @@ enum temp_sensor_id {
 
 enum pwm_channel {
 	PWM_CH_KBLIGHT,
-	PWM_CH_LED1,
-	PWM_CH_LED2,
-	PWM_CH_LED3,
-	PWM_CH_LED4,
+	PWM_CH_DB0_LED_BLUE,
+	PWM_CH_DB0_LED_RED,
+	PWM_CH_DB0_LED_GREEN,
+	PWM_CH_DB1_LED_BLUE,
+	PWM_CH_DB1_LED_RED,
+	PWM_CH_DB1_LED_GREEN,
 	PWM_CH_COUNT
 };
 
diff --git a/board/atlas/build.mk b/board/atlas/build.mk
index 8fbcd50554..77001ecfa1 100644
--- a/board/atlas/build.mk
+++ b/board/atlas/build.mk
@@ -12,4 +12,5 @@ CHIP_VARIANT:=npcx7m6f
 
 board-y=board.o
 board-$(CONFIG_BATTERY_SMART)+=battery.o
+board-$(CONFIG_LED_COMMON)+=led.o
 board-$(CONFIG_USB_POWER_DELIVERY)+=usb_pd_policy.o
diff --git a/board/atlas/led.c b/board/atlas/led.c
new file mode 100644
index 0000000000..85c1ef9214
--- /dev/null
+++ b/board/atlas/led.c
@@ -0,0 +1,84 @@
+/* Copyright 2018 The Chromium OS Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+/* Atlas specific PWM LED settings. */
+
+#include "common.h"
+#include "ec_commands.h"
+#include "led_pwm.h"
+#include "pwm.h"
+#include "util.h"
+
+const enum ec_led_id supported_led_ids[] = {
+	EC_LED_ID_LEFT_LED,
+	EC_LED_ID_RIGHT_LED,
+};
+const int supported_led_ids_count = ARRAY_SIZE(supported_led_ids);
+
+/* We may not be using the blue channel long term. */
+struct pwm_led led_color_map[EC_LED_COLOR_COUNT] = {
+				/* Red, Green, Blue */
+	[EC_LED_COLOR_RED]    = {  45,   0,   0 },
+	[EC_LED_COLOR_GREEN]  = {   0,  30,   0 },
+	[EC_LED_COLOR_BLUE]   = {   0,   0,  60 },
+	[EC_LED_COLOR_YELLOW] = {  25,  15,   0 },
+	[EC_LED_COLOR_WHITE]  = {  30,  25,  25 },
+	[EC_LED_COLOR_AMBER]  = {  40,   5,   0 },
+};
+
+/* Two tri-color LEDs with red, green, and blue channels. */
+struct pwm_led pwm_leds[CONFIG_LED_PWM_COUNT] = {
+	[PWM_LED0] = {
+		PWM_CH_DB0_LED_RED,
+		PWM_CH_DB0_LED_GREEN,
+		PWM_CH_DB0_LED_BLUE,
+	},
+	[PWM_LED1] = {
+		PWM_CH_DB1_LED_RED,
+		PWM_CH_DB1_LED_GREEN,
+		PWM_CH_DB1_LED_BLUE,
+	},
+};
+
+void led_get_brightness_range(enum ec_led_id led_id, uint8_t *brightness_range)
+{
+	brightness_range[EC_LED_COLOR_RED] = 100;
+	brightness_range[EC_LED_COLOR_GREEN] = 100;
+	brightness_range[EC_LED_COLOR_YELLOW] = 100;
+	brightness_range[EC_LED_COLOR_AMBER] = 100;
+	brightness_range[EC_LED_COLOR_BLUE] = 100;
+	brightness_range[EC_LED_COLOR_WHITE] = 100;
+}
+
+int led_set_brightness(enum ec_led_id led_id, const uint8_t *brightness)
+{
+	enum pwm_led_id pwm_id;
+
+	/* Convert ec_led_id to pwm_led_id. */
+	if (led_id == EC_LED_ID_LEFT_LED)
+		pwm_id = PWM_LED1;
+	else if (led_id == EC_LED_ID_RIGHT_LED)
+		pwm_id = PWM_LED0;
+	else
+		return EC_ERROR_UNKNOWN;
+
+	if (brightness[EC_LED_COLOR_RED])
+		set_pwm_led_color(pwm_id, EC_LED_COLOR_RED);
+	else if (brightness[EC_LED_COLOR_GREEN])
+		set_pwm_led_color(pwm_id, EC_LED_COLOR_GREEN);
+	else if (brightness[EC_LED_COLOR_BLUE])
+		set_pwm_led_color(pwm_id, EC_LED_COLOR_BLUE);
+	else if (brightness[EC_LED_COLOR_YELLOW])
+		set_pwm_led_color(pwm_id, EC_LED_COLOR_YELLOW);
+	else if (brightness[EC_LED_COLOR_WHITE])
+		set_pwm_led_color(pwm_id, EC_LED_COLOR_WHITE);
+	else if (brightness[EC_LED_COLOR_AMBER])
+		set_pwm_led_color(pwm_id, EC_LED_COLOR_AMBER);
+	else
+		/* Otherwise, the "color" is "off". */
+		set_pwm_led_color(pwm_id, -1);
+
+	return EC_SUCCESS;
+}