[PATCH 3/5] pinctrl: qcom: add support setting pin configuration for special pins

[Neil Armstrong]

Use the previously introduced msm_special_pin_data to setup the special
pins configuration if the SoC driver have them specified.

Signed-off-by: Neil Armstrong <neil.armstrong at linaro.org>
---
 drivers/pinctrl/qcom/pinctrl-qcom.c | 37 +++++++++++++++++++++++++++++++++++--
 1 file changed, 35 insertions(+), 2 deletions(-)

diff --git a/drivers/pinctrl/qcom/pinctrl-qcom.c b/drivers/pinctrl/qcom/pinctrl-qcom.c
index 4f4e9a83949..26a3fba194a 100644
--- a/drivers/pinctrl/qcom/pinctrl-qcom.c
+++ b/drivers/pinctrl/qcom/pinctrl-qcom.c
@@ -103,14 +103,47 @@ static int msm_pinmux_set(struct udevice *dev, unsigned int pin_selector,
 	return 0;
 }
 
+static int msm_pinconf_set_special(struct msm_pinctrl_priv *priv, unsigned int pin_selector,
+				   unsigned int param, unsigned int argument)
+{
+	unsigned int offset = pin_selector - priv->data->pin_data.special_pins_start;
+	const struct msm_special_pin_data *data;
+
+	if (!priv->data->pin_data.special_pins_data)
+		return 0;
+
+	data = &priv->data->pin_data.special_pins_data[offset];
+
+	switch (param) {
+	case PIN_CONFIG_DRIVE_STRENGTH:
+		argument = (argument / 2) - 1;
+		clrsetbits_le32(priv->base + data->ctl_reg,
+				GENMASK(2, 0) << data->drv_bit,
+				argument << data->drv_bit);
+		break;
+	case PIN_CONFIG_BIAS_DISABLE:
+		clrbits_le32(priv->base + data->ctl_reg,
+			     TLMM_GPIO_PULL_MASK << data->pull_bit);
+		break;
+	case PIN_CONFIG_BIAS_PULL_UP:
+		clrsetbits_le32(priv->base + data->ctl_reg,
+				TLMM_GPIO_PULL_MASK << data->pull_bit,
+				argument << data->pull_bit);
+		break;
+	default:
+		return 0;
+	}
+
+	return 0;
+}
+
 static int msm_pinconf_set(struct udevice *dev, unsigned int pin_selector,
 			   unsigned int param, unsigned int argument)
 {
 	struct msm_pinctrl_priv *priv = dev_get_priv(dev);
 
-	/* Always NOP for special pins */
 	if (qcom_is_special_pin(&priv->data->pin_data, pin_selector))
-		return 0;
+		return msm_pinconf_set_special(priv, pin_selector, param, argument);
 
 	switch (param) {
 	case PIN_CONFIG_DRIVE_STRENGTH:

-- 
2.34.1