1. 22 May, 2017 1 commit
    • Paul Cercueil's avatar
      pwm: jz4740: Let the pinctrl driver configure the pins · 47096d70
      Paul Cercueil authored
      Now that the JZ4740 and similar SoCs have a pinctrl driver, we rely on
      the pins being properly configured before the driver probes.
      
      One inherent problem of this new approach is that the pinctrl framework
      does not allow us to configure each pin on demand, when the various PWM
      channels are requested or released. For instance, the PWM channels can
      be configured from sysfs, which would require all PWM pins to be configured
      properly beforehand for the PWM function, eventually causing conflicts
      with other platform or board drivers.
      
      The proper solution here would be to modify the pwm-jz4740 driver to
      handle only one PWM channel, and create an instance of this driver
      for each one of the 8 PWM channels. Then, it could use the pinctrl
      framework to dynamically configure the PWM pin it controls.
      
      Until this can be done, the only jz4740 board supported upstream
      (Qi lb60) can configure all of its connected PWM pins in PWM function
      mode, since those are not used by other drivers nor by GPIOs on the
      board.
      Signed-off-by: default avatarPaul Cercueil <paul@crapouillou.net>
      Acked-by: default avatarThierry Reding <thierry.reding@gmail.com>
      Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
      47096d70
  2. 20 Oct, 2014 1 commit
  3. 12 Dec, 2013 2 commits
  4. 28 Nov, 2012 3 commits
  5. 05 Oct, 2012 1 commit