bcma: use chipcommon node from DT for SoC GPIO chip

This will allow us to define GPIO-attached devices (LEDs, buttons) in
the the device tree.

Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

diff --git a/Documentation/devicetree/bindings/bus/bcma.txt b/Documentation/devicetree/bindings/bus/bcma.txt
index e9070c1..62a4834 100644 (file)
--- a/Documentation/devicetree/bindings/bus/bcma.txt
+++ b/Documentation/devicetree/bindings/bus/bcma.txt
@@ -9,6 +9,11 @@ Required properties:
 The cores on the AXI bus are automatically detected by bcma with the
 memory ranges they are using and they get registered afterwards.
 
+The top-level axi bus may contain children representing attached cores
+(devices). This is needed since some hardware details can't be auto
+detected (e.g. IRQ numbers). Also some of the cores may be responsible
+for extra things, e.g. ChipCommon providing access to the GPIO chip.
+
 Example:
 
        axi@18000000 {
@@ -17,4 +22,11 @@ Example:
                ranges = <0x00000000 0x18000000 0x00100000>;
                #address-cells = <1>;
                #size-cells = <1>;
+
+               chipcommon {
+                       reg = <0x00000000 0x1000>;
+
+                       gpio-controller;
+                       #gpio-cells = <2>;
+               };
        };

diff --git a/drivers/bcma/driver_gpio.c b/drivers/bcma/driver_gpio.c
index 8ea497c..57ce5fe 100644 (file)
--- a/drivers/bcma/driver_gpio.c
+++ b/drivers/bcma/driver_gpio.c
@@ -217,6 +217,10 @@ int bcma_gpio_init(struct bcma_drv_cc *cc)
        chip->direction_output  = bcma_gpio_direction_output;
 #if IS_BUILTIN(CONFIG_BCM47XX)
        chip->to_irq            = bcma_gpio_to_irq;
+#endif
+#if IS_BUILTIN(CONFIG_OF)
+       if (cc->core->bus->hosttype == BCMA_HOSTTYPE_SOC)
+               chip->of_node   = cc->core->dev.of_node;
 #endif
        switch (cc->core->bus->chipinfo.id) {
        case BCMA_CHIP_ID_BCM5357: