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Commit ccdf81d0 authored by Dan O'Donovan's avatar Dan O'Donovan Committed by Linus Walleij
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pinctrl: cherryview: add option to set open-drain pin config 



On some CHV platforms, we need an option to configure the
open-drain setting for these pins.  This adds support for the
PIN_CONFIG_DRIVE_PUSH_PULL and PIN_CONFIG_DRIVE_OPEN_DRAIN to
disable/enable open-drain mode for a specific pin.

Signed-off-by: default avatarDan O'Donovan <dan@emutex.com>
Acked-by: default avatarMika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
parent 0bd50d71

drivers/pinctrl/intel/pinctrl-cherryview.c

+33 −0
Original line number Original line Diff line number Diff line
@@ -1108,6 +1108,27 @@ static int chv_config_set_pull(struct chv_pinctrl *pctrl, unsigned pin, 
	return 0;

	return 0;

}

}





static int chv_config_set_oden(struct chv_pinctrl *pctrl, unsigned int pin,

			       bool enable)

{

	void __iomem *reg = chv_padreg(pctrl, pin, CHV_PADCTRL1);

	unsigned long flags;

	u32 ctrl1;



	raw_spin_lock_irqsave(&chv_lock, flags);

	ctrl1 = readl(reg);



	if (enable)

		ctrl1 |= CHV_PADCTRL1_ODEN;

	else

		ctrl1 &= ~CHV_PADCTRL1_ODEN;



	chv_writel(ctrl1, reg);

	raw_spin_unlock_irqrestore(&chv_lock, flags);



	return 0;

}



static int chv_config_set(struct pinctrl_dev *pctldev, unsigned pin,

static int chv_config_set(struct pinctrl_dev *pctldev, unsigned pin,

			  unsigned long *configs, unsigned nconfigs)

			  unsigned long *configs, unsigned nconfigs)

{

{
@@ -1132,6 +1153,18 @@ static int chv_config_set(struct pinctrl_dev *pctldev, unsigned pin, 
				return ret;

				return ret;

			break;

			break;





		case PIN_CONFIG_DRIVE_PUSH_PULL:

			ret = chv_config_set_oden(pctrl, pin, false);

			if (ret)

				return ret;

			break;



		case PIN_CONFIG_DRIVE_OPEN_DRAIN:

			ret = chv_config_set_oden(pctrl, pin, true);

			if (ret)

				return ret;

			break;



		default:

		default:

			return -ENOTSUPP;

			return -ENOTSUPP;

		}

		}