Support gpio devicetree subnodes to allow a more detailed DT hardware
description.
Signed-off-by: Markus Pargmann <m...@pengutronix.de>
---
Hi,
This is an incremental patch for the imx1-core and imx27-pinctrl patches to
support the gpio nodes as iomux subdevices.
Linus, I can resend this integrated into the other two patches if you want.
Regards,
Markus Pargmann
.../bindings/pinctrl/fsl,imx27-pinctrl.txt | 22 ++++++++++++++++++++++
drivers/pinctrl/pinctrl-imx1-core.c | 7 +++++++
2 files changed, 29 insertions(+)
diff --git a/Documentation/devicetree/bindings/pinctrl/fsl,imx27-pinctrl.txt
b/Documentation/devicetree/bindings/pinctrl/fsl,imx27-pinctrl.txt
index 353eca0..d1706ea 100644
--- 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 4d5a9e7..2eadba7 100644
--- 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;
--
1.8.4.2
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