pinctrl: imx1-core populate subdevices

Support gpio devicetree subnodes to allow a more detailed DT hardware
description.

Signed-off-by: Markus Pargmann <mpa@pengutronix.de>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

diff --git a/Documentation/devicetree/bindings/pinctrl/fsl,imx27-pinctrl.txt b/Documentation/devicetree/bindings/pinctrl/fsl,imx27-pinctrl.txt
index 353eca0..d1706ea 100644 (file)
--- a/Documentation/devicetree/bindings/pinctrl/fsl,imx27-pinctrl.txt
+++ b/Documentation/devicetree/bindings/pinctrl/fsl,imx27-pinctrl.txt
@@ -52,12 +52,25 @@ Required properties for pin configuration node:
   CONFIG can be 0 or 1, meaning Pullup disable/enable.
 
 
+The iomux controller has gpio child nodes which are embedded in the iomux
+control registers. They have to be defined as child nodes of the iomux device
+node. If gpio subnodes are defined "#address-cells", "#size-cells" and "ranges"
+properties for the iomux device node are required.
 
 Example:
 
 iomuxc: iomuxc@10015000 {
        compatible = "fsl,imx27-iomuxc";
        reg = <0x10015000 0x600>;
+       #address-cells = <1>;
+       #size-cells = <1>;
+       ranges;
+
+       gpio1: gpio@10015000 {
+               ...
+       };
+
+       ...
 
        uart {
                pinctrl_uart1: uart-1 {
@@ -83,6 +96,15 @@ The above example using macros:
 iomuxc: iomuxc@10015000 {
        compatible = "fsl,imx27-iomuxc";
        reg = <0x10015000 0x600>;
+       #address-cells = <1>;
+       #size-cells = <1>;
+       ranges;
+
+       gpio1: gpio@10015000 {
+               ...
+       };
+
+       ...
 
        uart {
                pinctrl_uart1: uart-1 {

diff --git a/drivers/pinctrl/pinctrl-imx1-core.c b/drivers/pinctrl/pinctrl-imx1-core.c
index f77914a..17aecde 100644 (file)
--- a/drivers/pinctrl/pinctrl-imx1-core.c
+++ b/drivers/pinctrl/pinctrl-imx1-core.c
@@ -638,6 +638,13 @@ int imx1_pinctrl_core_probe(struct platform_device *pdev,
                return -EINVAL;
        }
 
+       ret = of_platform_populate(pdev->dev.of_node, NULL, NULL, &pdev->dev);
+       if (ret) {
+               pinctrl_unregister(ipctl->pctl);
+               dev_err(&pdev->dev, "Failed to populate subdevices\n");
+               return ret;
+       }
+
        dev_info(&pdev->dev, "initialized IMX pinctrl driver\n");
 
        return 0;