pinctrl: samsung: Hold pointer to driver data in bank struct

This patch is a preparation for converting the pinctrl-samsung driver to
one GPIO chip and IRQ domain per bank. It allows one having only
a pointer to particular bank struct to access driver data struct.

Signed-off-by: Tomasz Figa <t.figa@samsung.com>
Reviewed-by: Kyungmin Park <kyungmin.park@samsung.com>
Acked-by: Thomas Abraham <thomas.abraham@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

drivers/pinctrl/pinctrl-samsung.c

@@ -789,17 +789,18 @@ static const struct of_device_id samsung_pinctrl_dt_match[];
 
 /* retrieve the soc specific data */
 static struct samsung_pin_ctrl *samsung_pinctrl_get_soc_data(
+				struct samsung_pinctrl_drv_data *d,
 				struct platform_device *pdev)
 {
 	int id;
 	const struct of_device_id *match;
-	const struct device_node *node = pdev->dev.of_node;
+	struct device_node *node = pdev->dev.of_node;
 	struct device_node *np;
 	struct samsung_pin_ctrl *ctrl;
 	struct samsung_pin_bank *bank;
 	int i;
 
-	id = of_alias_get_id(pdev->dev.of_node, "pinctrl");
+	id = of_alias_get_id(node, "pinctrl");
 	if (id < 0) {
 		dev_err(&pdev->dev, "failed to get alias id\n");
 		return NULL;
@@ -809,6 +810,7 @@ static struct samsung_pin_ctrl *samsung_pinctrl_get_soc_data(
 
 	bank = ctrl->pin_banks;
 	for (i = 0; i < ctrl->nr_banks; ++i, ++bank) {
+		bank->drvdata = d;
 		bank->pin_base = ctrl->nr_pins;
 		ctrl->nr_pins += bank->nr_pins;
 		if (bank->eint_type == EINT_TYPE_GPIO) {
@@ -848,18 +850,18 @@ static int __devinit samsung_pinctrl_probe(struct platform_device *pdev)
 		return -ENODEV;
 	}
 
-	ctrl = samsung_pinctrl_get_soc_data(pdev);
-	if (!ctrl) {
-		dev_err(&pdev->dev, "driver data not available\n");
-		return -EINVAL;
-	}
-
 	drvdata = devm_kzalloc(dev, sizeof(*drvdata), GFP_KERNEL);
 	if (!drvdata) {
 		dev_err(dev, "failed to allocate memory for driver's "
 				"private data\n");
 		return -ENOMEM;
 	}
+
+	ctrl = samsung_pinctrl_get_soc_data(drvdata, pdev);
+	if (!ctrl) {
+		dev_err(&pdev->dev, "driver data not available\n");
+		return -EINVAL;
+	}
 	drvdata->ctrl = ctrl;
 	drvdata->dev = dev;
 

drivers/pinctrl/pinctrl-samsung.h

@@ -112,6 +112,7 @@ struct samsung_pinctrl_drv_data;
  * @irq_base: starting controller local irq number of the bank.
  * @name: name to be prefixed for each pin in this pin bank.
  * @of_node: OF node of the bank.
+ * @drvdata: link to controller driver data
  */
 struct samsung_pin_bank {
 	u32		pctl_offset;
@@ -126,6 +127,7 @@ struct samsung_pin_bank {
 	u32		irq_base;
 	char		*name;
 	struct device_node *of_node;
+	struct samsung_pinctrl_drv_data *drvdata;
 };
 
 /**