can: c_can: Adopt pinctrl support

Adopt pinctrl support to c_can driver based on c_can device
pointer, pinctrl driver configure SoC pins to d_can mode
according to definitions provided in .dts file.

In device specific device tree file 'pinctrl-names = "default";'
and 'pinctrl-0 = <&d_can1_pins>;' needs to add to configure pins
from c_can driver. d_can1_pins node contains the pinmux/config
details of d_can L/H pins.

Signed-off-by: AnilKumar Ch <[email protected]>
Acked-by: Tony Lindgren <[email protected]>
Signed-off-by: Marc Kleine-Budde <[email protected]>

Author: AnilKumar Ch

drivers/net/can/c_can/c_can_platform.c

@@ -32,6 +32,7 @@
 #include <linux/clk.h>
 #include <linux/of.h>
 #include <linux/of_device.h>
+#include <linux/pinctrl/consumer.h>
 
 #include <linux/can/dev.h>
 
@@ -97,6 +98,7 @@ static int __devinit c_can_plat_probe(struct platform_device *pdev)
 	struct c_can_priv *priv;
 	const struct of_device_id *match;
 	const struct platform_device_id *id;
+	struct pinctrl *pinctrl;
 	struct resource *mem;
 	int irq;
 	struct clk *clk;
@@ -113,6 +115,11 @@ static int __devinit c_can_plat_probe(struct platform_device *pdev)
 		id = platform_get_device_id(pdev);
 	}
 
+	pinctrl = devm_pinctrl_get_select_default(&pdev->dev);
+	if (IS_ERR(pinctrl))
+		dev_warn(&pdev->dev,
+			"failed to configure pins from driver\n");
+
 	/* get the appropriate clk */
 	clk = clk_get(&pdev->dev, NULL);
 	if (IS_ERR(clk)) {