kappa: enable led

This patch is enabling led temporally for incoming build.
Will add gpio control for led after CL:1712887 merged.

BUG=b:146844869
BRANCH=kukui
TEST=make sure led is showing amber while battery is charging.
make sure led is showing white after battery was fully charged.

Change-Id: I5b55bbed45360807dceca9fe2896084619fb900a
Signed-off-by: Devin Lu <Devin.Lu@quantatw.com>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/2009540
Reviewed-by: Ting Shen <phoenixshen@chromium.org>

4 files changed, 77 insertions, 6 deletions

diff --git a/board/kappa/board.c b/board/kappa/board.c
index 6460579664..51ea4de1ef 100644
--- a/board/kappa/board.c
+++ b/board/kappa/board.c
@@ -33,8 +33,6 @@
 #include "lid_switch.h"
 #include "power.h"
 #include "power_button.h"
-#include "pwm.h"
-#include "pwm_chip.h"
 #include "registers.h"
 #include "spi.h"
 #include "system.h"
@@ -118,6 +116,13 @@ const struct pi3usb9201_config_t pi3usb9201_bc12_chips[] = {
 		.i2c_addr_flags = PI3USB9201_I2C_ADDR_3_FLAGS,
 	},
 };
+/******************************************************************************/
+const struct it8801_pwm_t it8801_pwm_channels[] = {
+	[PWM_CH_LED_AMBER] = { 1 },
+	[PWM_LED_NO_CHANNEL] = { -1 },
+	[PWM_CH_LED_WHITE] = { 3 },
+};
+BUILD_ASSERT(ARRAY_SIZE(it8801_pwm_channels) == PWM_CH_COUNT);
 
 /******************************************************************************/
 const struct tcpc_config_t tcpc_config[CONFIG_USB_PD_PORT_MAX_COUNT] = {
diff --git a/board/kappa/board.h b/board/kappa/board.h
index db9d40413e..a8a5880074 100644
--- a/board/kappa/board.h
+++ b/board/kappa/board.h
@@ -20,9 +20,6 @@
 #undef CONFIG_CHIPSET_POWER_SEQ_VERSION
 #define CONFIG_CHIPSET_POWER_SEQ_VERSION 1
 
-/* TODO(b:135086465) led implementation */
-#undef CONFIG_LED_COMMON
-
 #define CONFIG_BATTERY_HW_PRESENT_CUSTOM
 
 #define CONFIG_CHARGER_PSYS
@@ -94,6 +91,17 @@
 
 #define PD_OPERATING_POWER_MW 30000
 
+#undef CONFIG_LED_PWM_NEAR_FULL_COLOR
+#undef CONFIG_LED_PWM_CHARGE_ERROR_COLOR
+
+#define CONFIG_LED_PWM_NEAR_FULL_COLOR EC_LED_COLOR_WHITE
+#define CONFIG_LED_PWM_CHARGE_ERROR_COLOR EC_LED_COLOR_WHITE
+
+#define CONFIG_LED_PWM
+#define CONFIG_LED_PWM_CHARGE_STATE_ONLY
+#define CONFIG_IO_EXPANDER_IT8801_PWM
+#define CONFIG_LED_PWM_COUNT 1
+
 #ifndef __ASSEMBLER__
 
 enum adc_channel {
@@ -134,6 +142,13 @@ enum battery_type {
 	BATTERY_TYPE_COUNT,
 };
 
+enum pwm_channel {
+	PWM_CH_LED_AMBER,
+	PWM_LED_NO_CHANNEL,
+	PWM_CH_LED_WHITE,
+	PWM_CH_COUNT
+};
+
 #include "gpio_signal.h"
 #include "registers.h"
 
diff --git a/board/kappa/build.mk b/board/kappa/build.mk
index 7f9669d7d7..e449fce9fc 100644
--- a/board/kappa/build.mk
+++ b/board/kappa/build.mk
@@ -12,4 +12,4 @@ CHIP_FAMILY:=stm32f0
 CHIP_VARIANT:=stm32f09x
 BASEBOARD:=kukui
 
-board-y=battery.o board.o
+board-y=battery.o board.o led.o
diff --git a/board/kappa/led.c b/board/kappa/led.c
new file mode 100644
index 0000000000..de4eca8bbf
--- /dev/null
+++ b/board/kappa/led.c
@@ -0,0 +1,51 @@
+/* Copyright 2020 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.
+ *
+ * Power and battery LED control for Kappa
+ */
+
+#include "common.h"
+#include "driver/ioexpander/it8801.h"
+#include "ec_commands.h"
+#include "led_common.h"
+#include "led_pwm.h"
+
+const enum ec_led_id supported_led_ids[] = {
+	EC_LED_ID_POWER_LED,
+};
+const int supported_led_ids_count = ARRAY_SIZE(supported_led_ids);
+
+struct pwm_led led_color_map[EC_LED_COLOR_COUNT] = {
+	[EC_LED_COLOR_AMBER] =  {100, 0, 0},
+	[EC_LED_COLOR_WHITE] =  {0, 0, 100},
+};
+
+struct pwm_led pwm_leds[CONFIG_LED_PWM_COUNT] = {
+	[PWM_LED0] = {
+		.ch0 = PWM_CH_LED_AMBER,
+		.ch1 = PWM_LED_NO_CHANNEL,
+		.ch2 = PWM_CH_LED_WHITE,
+		.enable = &it8801_pwm_enable,
+		.set_duty = &it8801_pwm_set_duty,
+	},
+};
+
+void led_get_brightness_range(enum ec_led_id led_id, uint8_t *brightness_range)
+{
+	brightness_range[EC_LED_COLOR_AMBER] = 100;
+	brightness_range[EC_LED_COLOR_WHITE] = 100;
+}
+
+int led_set_brightness(enum ec_led_id led_id, const uint8_t *brightness)
+{
+	if (brightness[EC_LED_COLOR_AMBER])
+		set_pwm_led_color(PWM_LED0, EC_LED_COLOR_AMBER);
+	else if (brightness[EC_LED_COLOR_WHITE])
+		set_pwm_led_color(PWM_LED0, EC_LED_COLOR_WHITE);
+	else
+		/* Otherwise, the "color" is "off". */
+		set_pwm_led_color(PWM_LED0, -1);
+
+	return EC_SUCCESS;
+}