kernel/drivers/platform/chrome/cros_kbd_led_backlight.c, branch linux-6.9.y

platform/chrome: cros_kbd_led_backlight: fix build warning

2022-07-20T01:22:59Z

drivers/platform/chrome/cros_kbd_led_backlight.c got a new build warning when using the randconfig in [1]: >>> warning: unused variable 'keyboard_led_drvdata_ec_pwm' The warning happens when CONFIG_CROS_EC is set but CONFIG_OF is not set. Reproduce: - mkdir build_dir - wget [1] -O build_dir/.config - COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 \ O=build_dir ARCH=s390 SHELL=/bin/bash drivers/platform/chrome/ Fix the warning by using __maybe_unused. Also use IS_ENABLED() because CROS_EC is a tristate. [1]: https://download.01.org/0day-ci/archive/20220717/202207170538.MR39dw8m-lkp@intel.com/config Fixes: 40f58143745e ("platform/chrome: cros_kbd_led_backlight: support EC PWM backend") Reported-by: kernel test robot Signed-off-by: Tzung-Bi Shih Reviewed-by: Guenter Roeck Link: https://lore.kernel.org/r/20220718105047.2356542-1-tzungbi@kernel.org

platform/chrome: cros_kbd_led_backlight: support EC PWM backend

2022-06-10T02:31:42Z

EC PWM backend uses EC_CMD_PWM_SET_KEYBOARD_BACKLIGHT and EC_CMD_PWM_GET_KEYBOARD_BACKLIGHT for setting and getting the brightness respectively. Signed-off-by: Tzung-Bi Shih Reviewed-by: Matthias Kaehlcke Tested-by: Matthias Kaehlcke Link: https://lore.kernel.org/r/20220523090822.3035189-6-tzungbi@kernel.org

platform/chrome: cros_kbd_led_backlight: support OF match

2022-06-10T02:31:42Z

For letting device tree based machines to use the driver, support OF match. Reviewed-by: Guenter Roeck Signed-off-by: Tzung-Bi Shih Reviewed-by: Matthias Kaehlcke Link: https://lore.kernel.org/r/20220523090822.3035189-5-tzungbi@kernel.org

platform/chrome: cros_kbd_led_backlight: separate ACPI backend

2022-06-10T02:31:42Z

cros_kbd_led_backlight uses ACPI_KEYBOARD_BACKLIGHT_WRITE and ACPI_KEYBOARD_BACKLIGHT_READ for setting and getting the brightness respectively. Separate ACPI operations for preparing the driver to support other backends. Signed-off-by: Tzung-Bi Shih Reviewed-by: Guenter Roeck Link: https://lore.kernel.org/r/20220523090822.3035189-3-tzungbi@kernel.org

platform/chrome: cros_kbd_led_backlight: sort headers alphabetically

2022-06-10T02:31:42Z

To be neat and reduce conflict possibility, sort the headers alphabetically. Reviewed-by: Guenter Roeck Signed-off-by: Tzung-Bi Shih Link: https://lore.kernel.org/r/20220523090822.3035189-2-tzungbi@kernel.org

platform/chrome: cros_kbd_led_backlight: switch to SPDX identifier

2019-02-01T09:13:06Z

Adopt the SPDX license identifier headers to ease license compliance management. Also change the term 'Chrome OS' for 'ChromeOS' to be coherent with other drivers. Signed-off-by: Enric Balletbo i Serra Reviewed-by: Guenter Roeck

platform/chrome: Add Chrome OS keyboard backlight LEDs support

2016-05-11T18:55:47Z

This is a driver for ACPI-based keyboard backlight LEDs found on Chromebooks. The driver locates \\_SB.KBLT ACPI device and exports backlight as "chromeos::kbd_backlight" LED class device in sysfs. Signed-off-by: Simon Que Signed-off-by: Duncan Laurie Tested-by: Evan McClain Signed-off-by: Dmitry Torokhov Signed-off-by: Olof Johansson