Hi All, On some of the BYT devices, for DSI panels, the panel enable/disable signals and backlight control are done using the Crystalcove PMIC. This series provides support for the same and has been reviewed earlier on - https://lkml.org/lkml/2015/4/29/301
This series addresses the review comments with one patch from last set already merged as - https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git/commit/?id=...
Basically following are implemented -
1. GPIO control for panel enable/disable with GFX device as consumer 2. New PWM chip driver added for CRC PMIC based backlight control 3. i915 is modified to use the CRC gpio chip and the CRC PWM chip to do backlight control. This is now added in the generic panel backlight control infrastructure
All these patches have been tested on AsusT100 and working fine using /sys/class/backlight/intel_backlight interface.
Patches were also verified on android-x86 tree for AsusT100.
Regards Shobhit
Shobhit Kumar (7): gpiolib: Add support for removing registered consumer lookup table mfd: intel_soc_pmic_core: Add lookup table for Panel Control as GPIO signal mfd: intel_soc_pmic_crc: Add PWM cell device for Crystalcove PMIC mfd: intel_soc_pmic_core: ADD PWM lookup table for CRC PMIC based PWM pwm: crc: Add Crystalcove (CRC) PWM driver drm/i915: Use the CRC gpio for panel enable/disable drm/i915: Backlight control using CRC PMIC based PWM driver
drivers/gpio/gpiolib.c | 13 ++++ drivers/gpu/drm/i915/intel_bios.h | 7 ++ drivers/gpu/drm/i915/intel_drv.h | 4 + drivers/gpu/drm/i915/intel_dsi.c | 38 ++++++++- drivers/gpu/drm/i915/intel_dsi.h | 3 + drivers/gpu/drm/i915/intel_panel.c | 95 +++++++++++++++++++++-- drivers/mfd/intel_soc_pmic_core.c | 29 +++++++ drivers/mfd/intel_soc_pmic_crc.c | 3 + drivers/pwm/Kconfig | 7 ++ drivers/pwm/Makefile | 1 + drivers/pwm/pwm-crc.c | 155 +++++++++++++++++++++++++++++++++++++ include/linux/gpio/machine.h | 1 + 12 files changed, 349 insertions(+), 7 deletions(-) create mode 100644 drivers/pwm/pwm-crc.c