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authorDan O'Donovan <dan@emutex.com>2016-06-10 13:23:35 +0100
committerLinus Walleij <linus.walleij@linaro.org>2016-06-15 08:37:39 +0200
commitccdf81d08dbe059885d77a82adea33d0599b6421 (patch)
treefd83020a1d72df6a7354a88574564bc379512658
parent0bd50d719b004110e791800450ad204399100a86 (diff)
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: Dan O'Donovan <dan@emutex.com> Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
-rw-r--r--drivers/pinctrl/intel/pinctrl-cherryview.c33
1 files changed, 33 insertions, 0 deletions
diff --git a/drivers/pinctrl/intel/pinctrl-cherryview.c b/drivers/pinctrl/intel/pinctrl-cherryview.c
index bf65c948b31d..7b3f147279c8 100644
--- a/drivers/pinctrl/intel/pinctrl-cherryview.c
+++ b/drivers/pinctrl/intel/pinctrl-cherryview.c
@@ -1108,6 +1108,27 @@ static int chv_config_set_pull(struct chv_pinctrl *pctrl, unsigned pin,
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,
unsigned long *configs, unsigned nconfigs)
{
@@ -1132,6 +1153,18 @@ static int chv_config_set(struct pinctrl_dev *pctldev, unsigned pin,
return ret;
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:
return -ENOTSUPP;
}