This work allows user to control the indicator and flash LEDs though sysfs in user space. TPS68470 is a part of INT3470 and provides GPIO, LED, and power controls. To allow the user to control these two LEDs, two masks for the ILEDCTL, called TPS68470_ILEDCTL_ENA and TPS68470_ILEDCTL_ENA and a two bits mask, called TPS68470_ILEDCTL_CTRLB are defined and are used to enable/disable the LEDs and set the power status, respectively. The LED driver called leds-tps68470 provides the sysfs interface and the register configuration implementation. For the indicator LED, only TPS68470_ILEDCTL_ENA needs to be set to turn on/off the LED. For the flash LED, TPS68470 provides 4 levels of power settings. After enabling the TPS68470_ILEDCTL_ENB, the power level should also be set. The strategy is Brightness | Power ======================= LED_OFF | - LED_ON | 4mA LED_HALF | 8mA LED_FULL | 16mA Moreover, the user and application can set the brightness through sysfs, /sys/class/leds/tps68470-ileda and /sys/class/leds/tps68470-iledb Kate Hsuan (3): platform: x86: int3472: Add MFD cell for tps68470 LED include: mfd: tps68470: Add masks for LEDA and LEDB leds: tps68470: Add LED control for tps68470 drivers/leds/Kconfig | 12 ++ drivers/leds/Makefile | 1 + drivers/leds/leds-tps68470.c | 170 ++++++++++++++++++ drivers/platform/x86/intel/int3472/tps68470.c | 3 +- include/linux/mfd/tps68470.h | 5 + 5 files changed, 190 insertions(+), 1 deletion(-) create mode 100644 drivers/leds/leds-tps68470.c -- 2.39.0
