openwrt/target/linux/lantiq/patches-3.7/0108-PINCTRL-lantiq-fixes.patch

From 13e754b5fff5be1930e2b8fe534a52b608c9e479 Mon Sep 17 00:00:00 2001
From: John Crispin <blogic@openwrt.org>
Date: Mon, 3 Dec 2012 19:27:28 +0100
Subject: [PATCH] PINCTRL: lantiq: fixes

---
 drivers/pinctrl/pinctrl-lantiq.c |   54 ++++++++++++++++++-----------
 drivers/pinctrl/pinctrl-lantiq.h |    1 +
 drivers/pinctrl/pinctrl-xway.c   |   70 ++++++++++++++++++++++++++++++++++----
 3 files changed, 99 insertions(+), 26 deletions(-)

--- a/drivers/pinctrl/pinctrl-lantiq.c
+++ b/drivers/pinctrl/pinctrl-lantiq.c
@@ -64,11 +64,13 @@ static void ltq_pinctrl_pin_dbg_show(str
 	seq_printf(s, " %s", dev_name(pctldev->dev));
 }
 
-static int ltq_pinctrl_dt_subnode_to_map(struct pinctrl_dev *pctldev,
+static void ltq_pinctrl_dt_subnode_to_map(struct pinctrl_dev *pctldev,
 				struct device_node *np,
 				struct pinctrl_map **map)
 {
 	struct ltq_pinmux_info *info = pinctrl_dev_get_drvdata(pctldev);
+	struct property *pins = of_find_property(np, "lantiq,pins", NULL);
+	struct property *groups = of_find_property(np, "lantiq,groups", NULL);
 	unsigned long configs[3];
 	unsigned num_configs = 0;
 	struct property *prop;
@@ -76,8 +78,20 @@ static int ltq_pinctrl_dt_subnode_to_map
 	const char *function;
 	int ret, i;
 
+	if (!pins && !groups) {
+		dev_err(pctldev->dev, "%s defines neither pins nor groups\n",
+			np->name);
+		return;
+	}
+
+	if (pins && groups) {
+		dev_err(pctldev->dev, "%s defines both pins and groups\n",
+			np->name);
+		return;
+	}
+
 	ret = of_property_read_string(np, "lantiq,function", &function);
-	if (!ret) {
+	if (groups && !ret) {
 		of_property_for_each_string(np, "lantiq,groups", prop, group) {
 			(*map)->type = PIN_MAP_TYPE_MUX_GROUP;
 			(*map)->name = function;
@@ -85,11 +99,6 @@ static int ltq_pinctrl_dt_subnode_to_map
 			(*map)->data.mux.function = function;
 			(*map)++;
 		}
-		if (of_find_property(np, "lantiq,pins", NULL))
-			dev_err(pctldev->dev,
-				"%s mixes pins and groups settings\n",
-				np->name);
-		return 0;
 	}
 
 	for (i = 0; i < info->num_params; i++) {
@@ -103,7 +112,7 @@ static int ltq_pinctrl_dt_subnode_to_map
 	}
 
 	if (!num_configs)
-		return -EINVAL;
+		return;
 
 	of_property_for_each_string(np, "lantiq,pins", prop, pin) {
 		(*map)->data.configs.configs = kmemdup(configs,
@@ -115,7 +124,16 @@ static int ltq_pinctrl_dt_subnode_to_map
 		(*map)->data.configs.num_configs = num_configs;
 		(*map)++;
 	}
-	return 0;
+	of_property_for_each_string(np, "lantiq,groups", prop, group) {
+		(*map)->data.configs.configs = kmemdup(configs,
+					num_configs * sizeof(unsigned long),
+					GFP_KERNEL);
+		(*map)->type = PIN_MAP_TYPE_CONFIGS_GROUP;
+		(*map)->name = group;
+		(*map)->data.configs.group_or_pin = group;
+		(*map)->data.configs.num_configs = num_configs;
+		(*map)++;
+	}
 }
 
 static int ltq_pinctrl_dt_subnode_size(struct device_node *np)
@@ -135,23 +153,19 @@ int ltq_pinctrl_dt_node_to_map(struct pi
 {
 	struct pinctrl_map *tmp;
 	struct device_node *np;
-	int ret;
+	int max_maps = 0;
 
-	*num_maps = 0;
 	for_each_child_of_node(np_config, np)
-		*num_maps += ltq_pinctrl_dt_subnode_size(np);
-	*map = kzalloc(*num_maps * sizeof(struct pinctrl_map), GFP_KERNEL);
+		max_maps += ltq_pinctrl_dt_subnode_size(np);
+	*map = kzalloc(max_maps * sizeof(struct pinctrl_map) * 2, GFP_KERNEL);
 	if (!*map)
 		return -ENOMEM;
 	tmp = *map;
 
-	for_each_child_of_node(np_config, np) {
-		ret = ltq_pinctrl_dt_subnode_to_map(pctldev, np, &tmp);
-		if (ret < 0) {
-			ltq_pinctrl_dt_free_map(pctldev, *map, *num_maps);
-			return ret;
-		}
-	}
+	for_each_child_of_node(np_config, np)
+		ltq_pinctrl_dt_subnode_to_map(pctldev, np, &tmp);
+	*num_maps = ((int)(tmp - *map));
+
 	return 0;
 }
 
--- a/drivers/pinctrl/pinctrl-lantiq.h
+++ b/drivers/pinctrl/pinctrl-lantiq.h
@@ -34,6 +34,7 @@ enum ltq_pinconf_param {
 	LTQ_PINCONF_PARAM_OPEN_DRAIN,
 	LTQ_PINCONF_PARAM_DRIVE_CURRENT,
 	LTQ_PINCONF_PARAM_SLEW_RATE,
+	LTQ_PINCONF_PARAM_OUTPUT,
 };
 
 struct ltq_cfg_param {
--- a/drivers/pinctrl/pinctrl-xway.c
+++ b/drivers/pinctrl/pinctrl-xway.c
@@ -443,7 +443,7 @@ static int xway_pinconf_get(struct pinct
 		else
 			reg = GPIO_OD(pin);
 		*config = LTQ_PINCONF_PACK(param,
-			!!gpio_getbit(info->membase[0], reg, PORT_PIN(pin)));
+			!gpio_getbit(info->membase[0], reg, PORT_PIN(pin)));
 		break;
 
 	case LTQ_PINCONF_PARAM_PULL:
@@ -466,6 +466,11 @@ static int xway_pinconf_get(struct pinct
 			*config = LTQ_PINCONF_PACK(param, 1);
 		break;
 
+	case LTQ_PINCONF_PARAM_OUTPUT:
+		reg = GPIO_DIR(pin);
+		*config = LTQ_PINCONF_PACK(param,
+			gpio_getbit(info->membase[0], reg, PORT_PIN(pin)));
+		break;
 	default:
 		dev_err(pctldev->dev, "Invalid config param %04x\n", param);
 		return -ENOTSUPP;
@@ -489,7 +494,10 @@ static int xway_pinconf_set(struct pinct
 			reg = GPIO3_OD;
 		else
 			reg = GPIO_OD(pin);
-		gpio_setbit(info->membase[0], reg, PORT_PIN(pin));
+		if (arg == 0)
+			gpio_setbit(info->membase[0], reg, PORT_PIN(pin));
+		else
+			gpio_clearbit(info->membase[0], reg, PORT_PIN(pin));
 		break;
 
 	case LTQ_PINCONF_PARAM_PULL:
@@ -515,6 +523,14 @@ static int xway_pinconf_set(struct pinct
 			dev_err(pctldev->dev, "Invalid pull value %d\n", arg);
 		break;
 
+	case LTQ_PINCONF_PARAM_OUTPUT:
+		reg = GPIO_DIR(pin);
+		if (arg == 0)
+			gpio_clearbit(info->membase[0], reg, PORT_PIN(pin));
+		else
+			gpio_setbit(info->membase[0], reg, PORT_PIN(pin));
+		break;
+
 	default:
 		dev_err(pctldev->dev, "Invalid config param %04x\n", param);
 		return -ENOTSUPP;
@@ -522,9 +538,25 @@ static int xway_pinconf_set(struct pinct
 	return 0;
 }
 
+int xway_pinconf_group_set(struct pinctrl_dev *pctldev,
+			unsigned selector,
+			unsigned long config)
+{
+	struct ltq_pinmux_info *info = pinctrl_dev_get_drvdata(pctldev);
+	int i, ret = 0;
+
+	for (i = 0; i < info->grps[selector].npins && !ret; i++)
+		ret = xway_pinconf_set(pctldev,
+					info->grps[selector].pins[i], config);
+
+	return ret;
+}
+
+
 struct pinconf_ops xway_pinconf_ops = {
 	.pin_config_get	= xway_pinconf_get,
 	.pin_config_set	= xway_pinconf_set,
+	.pin_config_group_set = xway_pinconf_group_set,
 };
 
 static struct pinctrl_desc xway_pctrl_desc = {
@@ -532,10 +564,9 @@ static struct pinctrl_desc xway_pctrl_de
 	.confops	= &xway_pinconf_ops,
 };
 
-static inline int xway_mux_apply(struct pinctrl_dev *pctrldev,
+static int mux_apply(struct ltq_pinmux_info *info,
 				int pin, int mux)
 {
-	struct ltq_pinmux_info *info = pinctrl_dev_get_drvdata(pctrldev);
 	int port = PORT(pin);
 	u32 alt1_reg = GPIO_ALT1(pin);
 
@@ -555,9 +586,18 @@ static inline int xway_mux_apply(struct
 	return 0;
 }
 
+static inline int xway_mux_apply(struct pinctrl_dev *pctrldev,
+				int pin, int mux)
+{
+	struct ltq_pinmux_info *info = pinctrl_dev_get_drvdata(pctrldev);
+
+	return mux_apply(info, pin, mux);
+}
+
 static const struct ltq_cfg_param xway_cfg_params[] = {
 	{"lantiq,pull",		LTQ_PINCONF_PARAM_PULL},
 	{"lantiq,open-drain",	LTQ_PINCONF_PARAM_OPEN_DRAIN},
+	{"lantiq,output",	LTQ_PINCONF_PARAM_OUTPUT},
 };
 
 static struct ltq_pinmux_info xway_info = {
@@ -598,6 +638,10 @@ static int xway_gpio_dir_out(struct gpio
 {
 	struct ltq_pinmux_info *info = dev_get_drvdata(chip->dev);
 
+	if (PORT(pin) == PORT3)
+		gpio_setbit(info->membase[0], GPIO3_OD, PORT_PIN(pin));
+	else
+		gpio_setbit(info->membase[0], GPIO_OD(pin), PORT_PIN(pin));
 	gpio_setbit(info->membase[0], GPIO_DIR(pin), PORT_PIN(pin));
 	xway_gpio_set(chip, pin, val);
 
@@ -618,6 +662,18 @@ static void xway_gpio_free(struct gpio_c
 	pinctrl_free_gpio(gpio);
 }
 
+static int xway_gpio_to_irq(struct gpio_chip *chip, unsigned offset)
+{
+	struct ltq_pinmux_info *info = dev_get_drvdata(chip->dev);
+	int i;
+
+	for (i = 0; i < info->num_exin; i++)
+		if (info->exin[i] == offset)
+			return ltq_eiu_get_irq(i);
+
+	return -1;
+}
+
 static struct gpio_chip xway_chip = {
 	.label = "gpio-xway",
 	.direction_input = xway_gpio_dir_in,
@@ -626,6 +682,7 @@ static struct gpio_chip xway_chip = {
 	.set = xway_gpio_set,
 	.request = xway_gpio_req,
 	.free = xway_gpio_free,
+	.to_irq = xway_gpio_to_irq,
 	.base = -1,
 };