zephyr: Add common led implementation to shim dir

Current implementation supports gpio based leds. It has been
tested on lazor board and can be expanded to other boards.

Kconfig.led_dt will eventually be replaced by Kconfig.led once
the shim layer supports PWM based LEDs as well and each board
has added led.dts policy file

BRANCH=None
BUG=b:226019522, b:194430340
TEST=manual led test on lazor

Signed-off-by: Parth Malkan <parthmalkan@google.com>
Change-Id: I761d5d52bf91a9a44bb70d421c54634f5cbb795a
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/3540926
Reviewed-by: Wai-Hong Tam <waihong@google.com>

Author: Parth Malkan

zephyr/CMakeLists.txt

@@ -295,6 +295,8 @@ zephyr_library_sources_ifdef(CONFIG_PLATFORM_EC_PWM_KBLIGHT
                                                 "${PLATFORM_EC}/common/keyboard_backlight.c")
 zephyr_library_sources_ifdef(CONFIG_PLATFORM_EC_LED_COMMON
                                                 "${PLATFORM_EC}/common/led_common.c")
+zephyr_library_sources_ifdef(CONFIG_PLATFORM_EC_LED_DT
+                                                "${PLATFORM_EC}/common/led_common.c")
 zephyr_library_sources_ifdef(CONFIG_PLATFORM_EC_LED_PWM
                                                 "${PLATFORM_EC}/common/led_pwm.c")
 zephyr_library_sources_ifdef(CONFIG_PLATFORM_EC_LED_ONOFF_STATES

zephyr/Kconfig

@@ -51,6 +51,7 @@ rsource "Kconfig.init_priority"
 rsource "Kconfig.ioex"
 rsource "Kconfig.keyboard"
 rsource "Kconfig.led"
+rsource "Kconfig.led_dt"
 rsource "Kconfig.panic"
 rsource "Kconfig.port80"
 rsource "Kconfig.powerseq"

zephyr/Kconfig.led_dt

@@ -0,0 +1,9 @@
+# Copyright 2022 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.
+
+menuconfig PLATFORM_EC_LED_DT
+	bool "LED Support"
+	help
+	  Enable devicetree based LED module supporting automatic control of the
+	  battery and power LEDs.

zephyr/projects/trogdor/lazor/CMakeLists.txt

@@ -21,6 +21,3 @@ zephyr_library_sources(
 # Board specific implementation
 zephyr_library_sources_ifdef(CONFIG_PLATFORM_EC_I2C
   "src/i2c.c")
-
-zephyr_library_sources_ifdef(CONFIG_PLATFORM_EC_LED_COMMON
-  "src/led.c")

zephyr/projects/trogdor/lazor/prj.conf

@@ -23,7 +23,7 @@ CONFIG_PLATFORM_EC_POWER_BUTTON=y
 CONFIG_PLATFORM_EC_I2C=y
 
 # LED
-CONFIG_PLATFORM_EC_LED_COMMON=y
+CONFIG_PLATFORM_EC_LED_DT=y
 
 # PWM
 CONFIG_PWM=y

zephyr/shim/src/CMakeLists.txt

@@ -36,6 +36,7 @@ zephyr_library_sources_ifdef(CONFIG_PLATFORM_EC_IOEX_CROS_DRV
                                                             ioex_drv.c)
 zephyr_library_sources_ifdef(CONFIG_PLATFORM_EC_KEYBOARD    keyboard_raw.c)
 zephyr_library_sources_ifdef(CONFIG_PLATFORM_EC_KEYBOARD    keyscan.c)
+zephyr_library_sources_ifdef(CONFIG_PLATFORM_EC_LED_DT      led.c)
 zephyr_library_sources_ifdef(CONFIG_PLATFORM_EC_MKBP_EVENT  mkbp_event.c)
 zephyr_library_sources_ifdef(CONFIG_PLATFORM_EC_MOTIONSENSE
                                                             motionsense_sensors.c)