target/linux/sunxi/patches-4.9/0032-pinctrl-sunxi-Handle-bias-disable.patch

   1 From 07fe64ba213f36ca8f6ffd8c4d5893f022744fdb Mon Sep 17 00:00:00 2001
   2 From: Maxime Ripard <maxime.ripard@free-electrons.com>
   3 Date: Tue, 11 Oct 2016 17:46:01 +0200
   4 Subject: pinctrl: sunxi: Handle bias disable
   5
   6 So far, putting NO_PULL in allwinner,pull was ignored, behaving like if
   7 that property was not there at all.
   8
   9 Obviously, this is not the right thing to do, and in that case, we really
  10 need to just disable the bias.
  11
  12 Acked-by: Chen-Yu Tsai <wens@csie.org>
  13 Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
  14 Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
  15 ---
  16  drivers/pinctrl/sunxi/pinctrl-sunxi.c | 8 ++++++++
  17  1 file changed, 8 insertions(+)
  18
  19 --- a/drivers/pinctrl/sunxi/pinctrl-sunxi.c
  20 +++ b/drivers/pinctrl/sunxi/pinctrl-sunxi.c
  21 @@ -165,6 +165,8 @@ static int sunxi_pctrl_parse_bias_prop(s
  22                 return -EINVAL;
  23
  24         switch (val) {
  25 +       case SUN4I_PINCTRL_NO_PULL:
  26 +               return PIN_CONFIG_BIAS_DISABLE;
  27         case SUN4I_PINCTRL_PULL_UP:
  28                 return PIN_CONFIG_BIAS_PULL_UP;
  29         case SUN4I_PINCTRL_PULL_DOWN:
  30 @@ -401,6 +403,12 @@ static int sunxi_pconf_group_set(struct
  31                                 | dlevel << sunxi_dlevel_offset(pin),
  32                                 pctl->membase + sunxi_dlevel_reg(pin));
  33                         break;
  34 +               case PIN_CONFIG_BIAS_DISABLE:
  35 +                       val = readl(pctl->membase + sunxi_pull_reg(pin));
  36 +                       mask = PULL_PINS_MASK << sunxi_pull_offset(pin);
  37 +                       writel((val & ~mask),
  38 +                              pctl->membase + sunxi_pull_reg(pin));
  39 +                       break;
  40                 case PIN_CONFIG_BIAS_PULL_UP:
  41                         val = readl(pctl->membase + sunxi_pull_reg(pin));
  42                         mask = PULL_PINS_MASK << sunxi_pull_offset(pin);