pinctrl: sunxi: add clock support

For the port controller to work, we need to enable the apb0_pio gate.
This commit adds the ability to enable one clock specified on the device
tree to the pinctrl driver.

Signed-off-by: Emilio López <emilio@elopez.com.ar>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

1 files changed, 8 insertions, 0 deletions

diff --git a/drivers/pinctrl/pinctrl-sunxi.c b/drivers/pinctrl/pinctrl-sunxi.c
index cb491d6ba601..617d351a0a44 100644
--- a/drivers/pinctrl/pinctrl-sunxi.c
+++ b/drivers/pinctrl/pinctrl-sunxi.c
@@ -11,6 +11,7 @@
  */
 
 #include <linux/io.h>
+#include <linux/clk.h>
 #include <linux/gpio.h>
 #include <linux/module.h>
 #include <linux/of.h>
@@ -1917,6 +1918,7 @@ static int sunxi_pinctrl_probe(struct platform_device *pdev)
         struct pinctrl_pin_desc *pins;
         struct sunxi_pinctrl *pctl;
         int i, ret, last_pin;
+        struct clk *clk;
 
         pctl = devm_kzalloc(&pdev->dev, sizeof(*pctl), GFP_KERNEL);
         if (!pctl)
@@ -1987,6 +1989,12 @@ static int sunxi_pinctrl_probe(struct platform_device *pdev)
                         goto gpiochip_error;
         }
 
+        clk = devm_clk_get(&pdev->dev, NULL);
+        if (IS_ERR(clk))
+                goto gpiochip_error;
+
+        clk_prepare_enable(clk);
+
         dev_info(&pdev->dev, "initialized sunXi PIO driver\n");
 
         return 0;