forked from luck/tmp_suning_uos_patched
1f0d3bb027
Use the new ChromeOS EC EC_CMD_PWM_{GET,SET}_DUTY commands to control
one or more PWMs attached to the Embedded Controller. Because the EC
allows us to modify the duty cycle (as a percentage, where U16_MAX is
100%) but not the period, we assign the period a fixed value of
EC_PWM_MAX_DUTY and reject all attempts to change it.
This driver supports only device tree at the moment, because that
provides a very flexible way of describing the relationship between PWMs
and their consumer devices (e.g., backlight). On a non-DT system, we'll
probably want to use the non-GENERIC addressing (i.e., we'll need to
make special device instances that will use EC_PWM_TYPE_KB_LIGHT or
EC_PWM_TYPE_DISPLAY_LIGHT), as well as the relatively inflexible
pwm_lookup infrastructure for matching devices. Defer that work for now.
Signed-off-by: Brian Norris <briannorris@chromium.org>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
|
||
|---|---|---|
| .. | ||
| core.c | ||
| Kconfig | ||
| Makefile | ||
| pwm-ab8500.c | ||
| pwm-atmel-hlcdc.c | ||
| pwm-atmel-tcb.c | ||
| pwm-atmel.c | ||
| pwm-bcm-iproc.c | ||
| pwm-bcm-kona.c | ||
| pwm-bcm2835.c | ||
| pwm-berlin.c | ||
| pwm-bfin.c | ||
| pwm-brcmstb.c | ||
| pwm-clps711x.c | ||
| pwm-crc.c | ||
| pwm-cros-ec.c | ||
| pwm-ep93xx.c | ||
| pwm-fsl-ftm.c | ||
| pwm-img.c | ||
| pwm-imx.c | ||
| pwm-jz4740.c | ||
| pwm-lp3943.c | ||
| pwm-lpc18xx-sct.c | ||
| pwm-lpc32xx.c | ||
| pwm-lpss-pci.c | ||
| pwm-lpss-platform.c | ||
| pwm-lpss.c | ||
| pwm-lpss.h | ||
| pwm-mtk-disp.c | ||
| pwm-mxs.c | ||
| pwm-omap-dmtimer.c | ||
| pwm-pca9685.c | ||
| pwm-puv3.c | ||
| pwm-pxa.c | ||
| pwm-rcar.c | ||
| pwm-renesas-tpu.c | ||
| pwm-rockchip.c | ||
| pwm-samsung.c | ||
| pwm-spear.c | ||
| pwm-sti.c | ||
| pwm-stmpe.c | ||
| pwm-sun4i.c | ||
| pwm-tegra.c | ||
| pwm-tiecap.c | ||
| pwm-tiehrpwm.c | ||
| pwm-tipwmss.c | ||
| pwm-twl-led.c | ||
| pwm-twl.c | ||
| pwm-vt8500.c | ||
| sysfs.c | ||