pinctrl: uniphier: allow to have pinctrl node under syscon node

Currently, the UniPhier pinctrl driver itself is a syscon, but it
turned out much more reasonable to make it a child node of a syscon
because our syscon node consists of a bunch of system configuration
registers, not only pinctrl, but also phy, and misc registers.
It is difficult to split the node.

To allow to migrate to the new DT structure, this commit adds new
compatible strings to not disturb the existing DT.  After a while,
the old binding will be removed.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

7 files changed, 35 insertions, 9 deletions

diff --git a/drivers/pinctrl/uniphier/pinctrl-uniphier-core.c b/drivers/pinctrl/uniphier/pinctrl-uniphier-core.c
index 5bfcfa8ac234..9b2ee717bccc 100644
--- a/drivers/pinctrl/uniphier/pinctrl-uniphier-core.c
+++ b/drivers/pinctrl/uniphier/pinctrl-uniphier-core.c
@@ -14,6 +14,7 @@
 
 #include <linux/export.h>
 #include <linux/mfd/syscon.h>
+#include <linux/of.h>
 #include <linux/pinctrl/pinconf.h>
 #include <linux/pinctrl/pinconf-generic.h>
 #include <linux/pinctrl/pinctrl.h>
@@ -29,6 +30,7 @@ struct uniphier_pinctrl_priv {
 	struct pinctrl_desc pctldesc;
 	struct pinctrl_dev *pctldev;
 	struct regmap *regmap;
+	unsigned int regbase;
 	struct uniphier_pinctrl_socdata *socdata;
 };
 
@@ -169,7 +171,7 @@ static int uniphier_conf_pin_bias_get(struct pinctrl_dev *pctldev,
 	reg = UNIPHIER_PINCTRL_PUPDCTRL_BASE + pupdctrl / 32 * 4;
 	shift = pupdctrl % 32;
 
-	ret = regmap_read(priv->regmap, reg, &val);
+	ret = regmap_read(priv->regmap, priv->regbase + reg, &val);
 	if (ret)
 		return ret;
 
@@ -229,7 +231,7 @@ static int uniphier_conf_pin_drive_get(struct pinctrl_dev *pctldev,
 	shift = drvctrl % 32;
 	mask = (1U << width) - 1;
 
-	ret = regmap_read(priv->regmap, reg, &val);
+	ret = regmap_read(priv->regmap, priv->regbase + reg, &val);
 	if (ret)
 		return ret;
 
@@ -250,7 +252,8 @@ static int uniphier_conf_pin_input_enable_get(struct pinctrl_dev *pctldev,
 		/* This pin is always input-enabled. */
 		return 0;
 
-	ret = regmap_read(priv->regmap, UNIPHIER_PINCTRL_IECTRL, &val);
+	ret = regmap_read(priv->regmap,
+			  priv->regbase + UNIPHIER_PINCTRL_IECTRL, &val);
 	if (ret)
 		return ret;
 
@@ -363,7 +366,8 @@ static int uniphier_conf_pin_bias_set(struct pinctrl_dev *pctldev,
 	reg = UNIPHIER_PINCTRL_PUPDCTRL_BASE + pupdctrl / 32 * 4;
 	shift = pupdctrl % 32;
 
-	return regmap_update_bits(priv->regmap, reg, 1 << shift, val << shift);
+	return regmap_update_bits(priv->regmap, priv->regbase + reg,
+				  1 << shift, val << shift);
 }
 
 static int uniphier_conf_pin_drive_set(struct pinctrl_dev *pctldev,
@@ -423,7 +427,7 @@ static int uniphier_conf_pin_drive_set(struct pinctrl_dev *pctldev,
 	shift = drvctrl % 32;
 	mask = (1U << width) - 1;
 
-	return regmap_update_bits(priv->regmap, reg,
+	return regmap_update_bits(priv->regmap, priv->regbase + reg,
 				  mask << shift, val << shift);
 }
 
@@ -447,7 +451,7 @@ static int uniphier_conf_pin_input_enable(struct pinctrl_dev *pctldev,
 	if (iectrl == UNIPHIER_PIN_IECTRL_NONE)
 		return enable ? 0 : -EINVAL;
 
-	reg = UNIPHIER_PINCTRL_IECTRL + iectrl / 32 * 4;
+	reg = priv->regbase + UNIPHIER_PINCTRL_IECTRL + iectrl / 32 * 4;
 	mask = BIT(iectrl % 32);
 
 	return regmap_update_bits(priv->regmap, reg, mask, enable ? mask : 0);
@@ -597,7 +601,7 @@ static int uniphier_pmx_set_one_mux(struct pinctrl_dev *pctldev, unsigned pin,
 	 * stored in the offset+4.
 	 */
 	for (; reg < reg_end; reg += 4) {
-		ret = regmap_update_bits(priv->regmap, reg,
+		ret = regmap_update_bits(priv->regmap, priv->regbase + reg,
 					 mask << shift, muxval << shift);
 		if (ret)
 			return ret;
@@ -606,7 +610,8 @@ static int uniphier_pmx_set_one_mux(struct pinctrl_dev *pctldev, unsigned pin,
 
 	if (load_pinctrl) {
 		ret = regmap_write(priv->regmap,
-				   UNIPHIER_PINCTRL_LOAD_PINMUX, 1);
+				   priv->regbase + UNIPHIER_PINCTRL_LOAD_PINMUX,
+				   1);
 		if (ret)
 			return ret;
 	}
@@ -679,6 +684,7 @@ int uniphier_pinctrl_probe(struct platform_device *pdev,
 {
 	struct device *dev = &pdev->dev;
 	struct uniphier_pinctrl_priv *priv;
+	struct device_node *parent;
 
 	if (!socdata ||
 	    !socdata->pins || !socdata->npins ||
@@ -692,7 +698,21 @@ int uniphier_pinctrl_probe(struct platform_device *pdev,
 	if (!priv)
 		return -ENOMEM;
 
-	priv->regmap = syscon_node_to_regmap(dev->of_node);
+	if (of_device_is_compatible(dev->of_node, "socionext,ph1-ld4-pinctrl") ||
+	    of_device_is_compatible(dev->of_node, "socionext,ph1-pro4-pinctrl") ||
+	    of_device_is_compatible(dev->of_node, "socionext,ph1-sld8-pinctrl") ||
+	    of_device_is_compatible(dev->of_node, "socionext,ph1-pro5-pinctrl") ||
+	    of_device_is_compatible(dev->of_node, "socionext,proxstream2-pinctrl") ||
+	    of_device_is_compatible(dev->of_node, "socionext,ph1-ld6b-pinctrl")) {
+		/* old binding */
+		priv->regmap = syscon_node_to_regmap(dev->of_node);
+	} else {
+		priv->regbase = 0x1000;
+		parent = of_get_parent(dev->of_node);
+		priv->regmap = syscon_node_to_regmap(parent);
+		of_node_put(parent);
+	}
+
 	if (IS_ERR(priv->regmap)) {
 		dev_err(dev, "failed to get regmap\n");
 		return PTR_ERR(priv->regmap);
diff --git a/drivers/pinctrl/uniphier/pinctrl-uniphier-ld4.c b/drivers/pinctrl/uniphier/pinctrl-uniphier-ld4.c
index 7437483d1bdb..98044bcd493e 100644
--- a/drivers/pinctrl/uniphier/pinctrl-uniphier-ld4.c
+++ b/drivers/pinctrl/uniphier/pinctrl-uniphier-ld4.c
@@ -914,6 +914,7 @@ static int uniphier_ld4_pinctrl_probe(struct platform_device *pdev)
 }
 
 static const struct of_device_id uniphier_ld4_pinctrl_match[] = {
+	{ .compatible = "socionext,uniphier-ld4-pinctrl" },
 	{ .compatible = "socionext,ph1-ld4-pinctrl" },
 	{ /* sentinel */ }
 };
diff --git a/drivers/pinctrl/uniphier/pinctrl-uniphier-ld6b.c b/drivers/pinctrl/uniphier/pinctrl-uniphier-ld6b.c
index d57519432538..6c0d66c23632 100644
--- a/drivers/pinctrl/uniphier/pinctrl-uniphier-ld6b.c
+++ b/drivers/pinctrl/uniphier/pinctrl-uniphier-ld6b.c
@@ -1275,6 +1275,7 @@ static int uniphier_ld6b_pinctrl_probe(struct platform_device *pdev)
 }
 
 static const struct of_device_id uniphier_ld6b_pinctrl_match[] = {
+	{ .compatible = "socionext,uniphier-ld6b-pinctrl" },
 	{ .compatible = "socionext,ph1-ld6b-pinctrl" },
 	{ /* sentinel */ }
 };
diff --git a/drivers/pinctrl/uniphier/pinctrl-uniphier-pro4.c b/drivers/pinctrl/uniphier/pinctrl-uniphier-pro4.c
index 35c5c5129935..8c614937bd8b 100644
--- a/drivers/pinctrl/uniphier/pinctrl-uniphier-pro4.c
+++ b/drivers/pinctrl/uniphier/pinctrl-uniphier-pro4.c
@@ -1573,6 +1573,7 @@ static int uniphier_pro4_pinctrl_probe(struct platform_device *pdev)
 }
 
 static const struct of_device_id uniphier_pro4_pinctrl_match[] = {
+	{ .compatible = "socionext,uniphier-pro4-pinctrl" },
 	{ .compatible = "socionext,ph1-pro4-pinctrl" },
 	{ /* sentinel */ }
 };
diff --git a/drivers/pinctrl/uniphier/pinctrl-uniphier-pro5.c b/drivers/pinctrl/uniphier/pinctrl-uniphier-pro5.c
index f94eb42270cf..55d4a12282a0 100644
--- a/drivers/pinctrl/uniphier/pinctrl-uniphier-pro5.c
+++ b/drivers/pinctrl/uniphier/pinctrl-uniphier-pro5.c
@@ -1364,6 +1364,7 @@ static int uniphier_pro5_pinctrl_probe(struct platform_device *pdev)
 }
 
 static const struct of_device_id uniphier_pro5_pinctrl_match[] = {
+	{ .compatible = "socionext,uniphier-pro5-pinctrl" },
 	{ .compatible = "socionext,ph1-pro5-pinctrl" },
 	{ /* sentinel */ }
 };
diff --git a/drivers/pinctrl/uniphier/pinctrl-uniphier-pxs2.c b/drivers/pinctrl/uniphier/pinctrl-uniphier-pxs2.c
index c879be3e72d6..8e1d73ea4ff0 100644
--- a/drivers/pinctrl/uniphier/pinctrl-uniphier-pxs2.c
+++ b/drivers/pinctrl/uniphier/pinctrl-uniphier-pxs2.c
@@ -1254,6 +1254,7 @@ static int uniphier_pxs2_pinctrl_probe(struct platform_device *pdev)
 }
 
 static const struct of_device_id uniphier_pxs2_pinctrl_match[] = {
+	{ .compatible = "socionext,uniphier-pxs2-pinctrl" },
 	{ .compatible = "socionext,proxstream2-pinctrl" },
 	{ /* sentinel */ }
 };
diff --git a/drivers/pinctrl/uniphier/pinctrl-uniphier-sld8.c b/drivers/pinctrl/uniphier/pinctrl-uniphier-sld8.c
index 096a460490a0..8ea740df9e6b 100644
--- a/drivers/pinctrl/uniphier/pinctrl-uniphier-sld8.c
+++ b/drivers/pinctrl/uniphier/pinctrl-uniphier-sld8.c
@@ -841,6 +841,7 @@ static int uniphier_sld8_pinctrl_probe(struct platform_device *pdev)
 }
 
 static const struct of_device_id uniphier_sld8_pinctrl_match[] = {
+	{ .compatible = "socionext,uniphier-sld8-pinctrl" },
 	{ .compatible = "socionext,ph1-sld8-pinctrl" },
 	{ /* sentinel */ }
 };