openwrtv4/target/linux/ipq806x/patches/0033-pinctrl-msm-Support-output-high-low-configuration.patch

From 469f83e0ed374250be5fd6202ac535276a752fa8 Mon Sep 17 00:00:00 2001
From: Bjorn Andersson <bjorn@kryo.se>
Date: Tue, 4 Feb 2014 19:55:31 -0800
Subject: [PATCH 033/182] pinctrl-msm: Support output-{high,low} configuration

Add support for configuring pins as output with value as from the
pinconf-generic interface.

Signed-off-by: Bjorn Andersson <bjorn.andersson@sonymobile.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
---
 drivers/pinctrl/pinctrl-msm.c |   27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)

--- a/drivers/pinctrl/pinctrl-msm.c
+++ b/drivers/pinctrl/pinctrl-msm.c
@@ -214,6 +214,11 @@ static int msm_config_reg(struct msm_pin
 		*bit = g->drv_bit;
 		*mask = 7;
 		break;
+	case PIN_CONFIG_OUTPUT:
+		*reg = g->ctl_reg;
+		*bit = g->oe_bit;
+		*mask = 1;
+		break;
 	default:
 		dev_err(pctrl->dev, "Invalid config param %04x\n", param);
 		return -ENOTSUPP;
@@ -282,6 +287,14 @@ static int msm_config_group_get(struct p
 	case PIN_CONFIG_DRIVE_STRENGTH:
 		arg = msm_regval_to_drive(arg);
 		break;
+	case PIN_CONFIG_OUTPUT:
+		/* Pin is not output */
+		if (!arg)
+			return -EINVAL;
+
+		val = readl(pctrl->regs + g->io_reg);
+		arg = !!(val & BIT(g->in_bit));
+		break;
 	default:
 		dev_err(pctrl->dev, "Unsupported config parameter: %x\n",
 			param);
@@ -337,6 +350,20 @@ static int msm_config_group_set(struct p
 			else
 				arg = (arg / 2) - 1;
 			break;
+		case PIN_CONFIG_OUTPUT:
+			/* set output value */
+			spin_lock_irqsave(&pctrl->lock, flags);
+			val = readl(pctrl->regs + g->io_reg);
+			if (arg)
+				val |= BIT(g->out_bit);
+			else
+				val &= ~BIT(g->out_bit);
+			writel(val, pctrl->regs + g->io_reg);
+			spin_unlock_irqrestore(&pctrl->lock, flags);
+
+			/* enable output */
+			arg = 1;
+			break;
 		default:
 			dev_err(pctrl->dev, "Unsupported config parameter: %x\n",
 				param);