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pinctrl: rockchip: correctly handle arguments of pinconf options

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Change the rockchip pinctrl driver to handle the arguments to the pull
pinconfig options correctly. So only accept non-0 values for the
pull options as the rockchip pin-controller can only turn pulls on and
off (this via BIAS_DISABLE).

Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Heiko Stübner 2013-06-16 17:41:16 +02:00 committed by Linus Walleij
parent 0f9bc4bcdf
commit 44b6d93043
1 changed files with 40 additions and 7 deletions
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47
drivers/pinctrl/pinctrl-rockchip.c
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@ -563,6 +563,25 @@ static const struct pinmux_ops rockchip_pmx_ops = {
* Pinconf_ops handling
*/
static bool rockchip_pinconf_pull_valid(struct rockchip_pin_ctrl *ctrl,
enum pin_config_param pull)
{
/* rk3066b does support any pulls */
if (!ctrl->pull_offset)
return pull ? false : true;
if (ctrl->pull_auto) {
if (pull != PIN_CONFIG_BIAS_PULL_PIN_DEFAULT &&
pull != PIN_CONFIG_BIAS_DISABLE)
return false;
} else {
if (pull == PIN_CONFIG_BIAS_PULL_PIN_DEFAULT)
return false;
}
return true;
}
/* set the pin config settings for a specified pin */
static int rockchip_pinconf_set(struct pinctrl_dev *pctldev, unsigned int pin,
unsigned long config)
@ -570,12 +589,21 @@ static int rockchip_pinconf_set(struct pinctrl_dev *pctldev, unsigned int pin,
struct rockchip_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
struct rockchip_pin_bank *bank = pin_to_bank(info, pin);
enum pin_config_param param = pinconf_to_config_param(config);
u16 arg = pinconf_to_config_argument(config);
switch (param) {
case PIN_CONFIG_BIAS_DISABLE:
return rockchip_set_pull(bank, pin - bank->pin_base, param);
break;
case PIN_CONFIG_BIAS_PULL_UP:
case PIN_CONFIG_BIAS_PULL_DOWN:
case PIN_CONFIG_BIAS_PULL_PIN_DEFAULT:
if (!rockchip_pinconf_pull_valid(info->ctrl, param))
return -ENOTSUPP;
if (!arg)
return -EINVAL;
return rockchip_set_pull(bank, pin - bank->pin_base, param);
break;
default:
@ -593,20 +621,25 @@ static int rockchip_pinconf_get(struct pinctrl_dev *pctldev, unsigned int pin,
struct rockchip_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
struct rockchip_pin_bank *bank = pin_to_bank(info, pin);
enum pin_config_param param = pinconf_to_config_param(*config);
unsigned int pull;
switch (param) {
case PIN_CONFIG_BIAS_DISABLE:
case PIN_CONFIG_BIAS_PULL_UP:
case PIN_CONFIG_BIAS_PULL_DOWN:
case PIN_CONFIG_BIAS_PULL_PIN_DEFAULT:
pull = rockchip_get_pull(bank, pin - bank->pin_base);
if (pull != param)
if (rockchip_get_pull(bank, pin - bank->pin_base) != param)
return -EINVAL;
*config = 0;
break;
case PIN_CONFIG_BIAS_PULL_UP:
case PIN_CONFIG_BIAS_PULL_DOWN:
case PIN_CONFIG_BIAS_PULL_PIN_DEFAULT:
if (!rockchip_pinconf_pull_valid(info->ctrl, param))
return -ENOTSUPP;
if (rockchip_get_pull(bank, pin - bank->pin_base) != param)
return -EINVAL;
*config = 1;
break;
default:
return -ENOTSUPP;
break;