This patch series modifies pinctrl/sh-pfc and pwm drivers. Since the R-Car
SoCs PWM Timer cannot output duty zero, the Salvator-X[S] board cannot
output max_brightness. This patch series can support it.
I'm not sure whether pinctrl subsystem and sh-pfc driver allows
to change the pin configuration automatically by .gpio_disable_free(),
so that I marked "RFC" on this patch series.
< log file >
# cd /sys/class/backlight/backlight
# echo 1 > brightness
# cat /sys/kernel/debug/pinctrl/e60060000.pin-controller-sh-pfc/pinmux-pins |\
grep -w 71
pin 71 (GP_2_7): e6e31000.pwm (GPIO UNCLAIMED) function pwm1 group pwm1_a
# echo 6 > brightness
# cat /sys/kernel/debug/pinctrl/e60060000.pin-controller-sh-pfc/pinmux-pins |\
grep -w 71
pin 71 (GP_2_7): e6e31000.pwm e6052000.gpio:459 function pwm1 group pwm1_a
# echo 1 > brightness
# cat /sys/kernel/debug/pinctrl/e60060000.pin-controller-sh-pfc/pinmux-pins |\
grep -w 71
pin 71 (GP_2_7): e6e31000.pwm (GPIO UNCLAIMED) function pwm1 group pwm1_a
Yoshihiro Shimoda (7):
pinctrl: sh-pfc: add new flags into struct sh_pfc_pin_config
pinctrl: sh-pfc: remove incomplete flag "cfg->type"
pinctrl: sh-pfc: Rollback to mux if requires when the gpio is freed
dt-bindings: pwm: rcar: Add specific gpios property to output duty
zero
pwm: rcar: remove a redundant condition in rcar_pwm_apply()
pwm: rcar: Add gpio support to output duty zero
arm64: dts: renesas: salvator-common: add gpio property into pwm1
.../devicetree/bindings/pwm/renesas,pwm-rcar.txt | 3 ++
arch/arm64/boot/dts/renesas/salvator-common.dtsi | 1 +
drivers/pinctrl/sh-pfc/pinctrl.c | 44 +++++++++++-----------
drivers/pwm/pwm-rcar.c | 36 +++++++++++++++++-
4 files changed, 60 insertions(+), 24 deletions(-)
--
2.7.4
