pinctrl: imx: make imx_pmx_ops.gpio_set_direction platform specific callbacks

Various IMX platforms may have different imx_pmx_ops.gpio_set_direction
implementations, so let's make it platform specific callbacks instead of
the fixed common one.

Currently only VF610 platform implements it. No function level changes.

Cc: Alexandre Courbot <gnurou@gmail.com>
Cc: Shawn Guo <shawnguo@kernel.org>
Acked-by: Stefan Agner <stefan@agner.ch>
Signed-off-by: Dong Aisheng <aisheng.dong@nxp.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

drivers/pinctrl/freescale/pinctrl-imx.c

@@ -35,18 +35,6 @@
 #define IMX_NO_PAD_CTL	0x80000000	/* no pin config need */
 #define IMX_PAD_SION 0x40000000		/* set SION */
 
-/**
- * @dev: a pointer back to containing device
- * @base: the offset to the controller in virtual memory
- */
-struct imx_pinctrl {
-	struct device *dev;
-	struct pinctrl_dev *pctl;
-	void __iomem *base;
-	void __iomem *input_sel_base;
-	struct imx_pinctrl_soc_info *info;
-};
-
 static inline const struct group_desc *imx_pinctrl_find_group_by_name(
 				struct pinctrl_dev *pctldev,
 				const char *name)
@@ -255,42 +243,11 @@ static int imx_pmx_set(struct pinctrl_dev *pctldev, unsigned selector,
 	return 0;
 }
 
-static int imx_pmx_gpio_set_direction(struct pinctrl_dev *pctldev,
-	   struct pinctrl_gpio_range *range, unsigned offset, bool input)
-{
-	struct imx_pinctrl *ipctl = pinctrl_dev_get_drvdata(pctldev);
-	struct imx_pinctrl_soc_info *info = ipctl->info;
-	const struct imx_pin_reg *pin_reg;
-	u32 reg;
-
-	/*
-	 * Only Vybrid has the input/output buffer enable flags (IBE/OBE)
-	 * They are part of the shared mux/conf register.
-	 */
-	if (!(info->flags & SHARE_MUX_CONF_REG))
-		return 0;
-
-	pin_reg = &info->pin_regs[offset];
-	if (pin_reg->mux_reg == -1)
-		return -EINVAL;
-
-	/* IBE always enabled allows us to read the value "on the wire" */
-	reg = readl(ipctl->base + pin_reg->mux_reg);
-	if (input)
-		reg &= ~0x2;
-	else
-		reg |= 0x2;
-	writel(reg, ipctl->base + pin_reg->mux_reg);
-
-	return 0;
-}
-
-static const struct pinmux_ops imx_pmx_ops = {
+struct pinmux_ops imx_pmx_ops = {
 	.get_functions_count = pinmux_generic_get_function_count,
 	.get_function_name = pinmux_generic_get_function_name,
 	.get_function_groups = pinmux_generic_get_function_groups,
 	.set_mux = imx_pmx_set,
-	.gpio_set_direction = imx_pmx_gpio_set_direction,
 };
 
 /* decode generic config into raw register values */
@@ -793,6 +750,9 @@ int imx_pinctrl_probe(struct platform_device *pdev,
 	imx_pinctrl_desc->custom_params = info->custom_params;
 	imx_pinctrl_desc->num_custom_params = info->num_custom_params;
 
+	/* platform specific callback */
+	imx_pmx_ops.gpio_set_direction = info->gpio_set_direction;
+
 	mutex_init(&info->mutex);
 
 	ipctl->info = info;

drivers/pinctrl/freescale/pinctrl-imx.h

@@ -16,9 +16,12 @@
 #define __DRIVERS_PINCTRL_IMX_H
 
 #include <linux/pinctrl/pinconf-generic.h>
+#include <linux/pinctrl/pinmux.h>
 
 struct platform_device;
 
+extern struct pinmux_ops imx_pmx_ops;
+
 /**
  * struct imx_pin - describes a single i.MX pin
  * @pin: the pin_id of this pin
@@ -76,6 +79,23 @@ struct imx_pinctrl_soc_info {
 	unsigned int num_decodes;
 	void (*fixup)(unsigned long *configs, unsigned int num_configs,
 		      u32 *raw_config);
+
+	int (*gpio_set_direction)(struct pinctrl_dev *pctldev,
+				  struct pinctrl_gpio_range *range,
+				  unsigned offset,
+				  bool input);
+};
+
+/**
+ * @dev: a pointer back to containing device
+ * @base: the offset to the controller in virtual memory
+ */
+struct imx_pinctrl {
+	struct device *dev;
+	struct pinctrl_dev *pctl;
+	void __iomem *base;
+	void __iomem *input_sel_base;
+	struct imx_pinctrl_soc_info *info;
 };
 
 #define IMX_CFG_PARAMS_DECODE(p, m, o) \

drivers/pinctrl/freescale/pinctrl-vf610.c

@@ -295,10 +295,35 @@ static const struct pinctrl_pin_desc vf610_pinctrl_pads[] = {
 	IMX_PINCTRL_PIN(VF610_PAD_PTA7),
 };
 
+static int vf610_pmx_gpio_set_direction(struct pinctrl_dev *pctldev,
+					struct pinctrl_gpio_range *range,
+					unsigned offset, bool input)
+{
+	struct imx_pinctrl *ipctl = pinctrl_dev_get_drvdata(pctldev);
+	struct imx_pinctrl_soc_info *info = ipctl->info;
+	const struct imx_pin_reg *pin_reg;
+	u32 reg;
+
+	pin_reg = &info->pin_regs[offset];
+	if (pin_reg->mux_reg == -1)
+		return -EINVAL;
+
+	/* IBE always enabled allows us to read the value "on the wire" */
+	reg = readl(ipctl->base + pin_reg->mux_reg);
+	if (input)
+		reg &= ~0x2;
+	else
+		reg |= 0x2;
+	writel(reg, ipctl->base + pin_reg->mux_reg);
+
+	return 0;
+}
+
 static struct imx_pinctrl_soc_info vf610_pinctrl_info = {
 	.pins = vf610_pinctrl_pads,
 	.npins = ARRAY_SIZE(vf610_pinctrl_pads),
 	.flags = SHARE_MUX_CONF_REG | ZERO_OFFSET_VALID,
+	.gpio_set_direction = vf610_pmx_gpio_set_direction,
 	.mux_mask = 0x700000,
 	.mux_shift = 20,
 };