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Subject[PATCH 5/7] net: rfkill: gpio: add device tree support
Date
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
---
.../devicetree/bindings/rfkill/rfkill-gpio.txt | 24 ++++++++++++++++++++++
net/rfkill/rfkill-gpio.c | 23 +++++++++++++++++++++
2 files changed, 47 insertions(+)
create mode 100644 Documentation/devicetree/bindings/rfkill/rfkill-gpio.txt

diff --git a/Documentation/devicetree/bindings/rfkill/rfkill-gpio.txt b/Documentation/devicetree/bindings/rfkill/rfkill-gpio.txt
new file mode 100644
index 0000000..a23da65
--- /dev/null
+++ b/Documentation/devicetree/bindings/rfkill/rfkill-gpio.txt
@@ -0,0 +1,24 @@
+GPIO controlled RFKILL devices
+
+Required properties:
+- compatible : Must be "rfkill-gpio".
+- rfkill-name : Name of RFKILL device
+- rfkill-type : Type of RFKILL device: 1 for WiFi, 2 for BlueTooth, etc.
+ See include/uapi/linux/rfkill.h for all valid values
+- gpios : At most two GPIO phandles
+- gpio-names : Shall be "reset" or "shutdown", matching gpios.
+ If both are provided, the "reset" GPIO is toggled first.
+
+Optional properties:
+- clocks : phandle to clock to enable/disable
+
+Example:
+
+ rfkill_bt {
+ compatible = "rfkill-gpio";
+ rfkill-name = "bluetooth";
+ rfkill-type = <2>;
+ gpios = <&pio 7 18 0>;
+ gpio-names = "reset";
+ clocks = <&clk_out_a>;
+ };
diff --git a/net/rfkill/rfkill-gpio.c b/net/rfkill/rfkill-gpio.c
index f46ddf7..a174359 100644
--- a/net/rfkill/rfkill-gpio.c
+++ b/net/rfkill/rfkill-gpio.c
@@ -26,6 +26,7 @@
#include <linux/slab.h>
#include <linux/acpi.h>
#include <linux/gpio/consumer.h>
+#include <linux/of_gpio.h>

#include <linux/rfkill-gpio.h>

@@ -81,6 +82,18 @@ static int rfkill_gpio_acpi_probe(struct device *dev,
return 0;
}

+static int rfkill_gpio_dt_probe(struct device *dev,
+ struct rfkill_gpio_data *rfkill)
+{
+ struct device_node * np = dev->of_node;
+
+ rfkill->name = np->name;
+ of_property_read_string(np, "rfkill-name", &rfkill->name);
+ of_property_read_u32(np, "rfkill-type", &rfkill->type);
+
+ return 0;
+}
+
static int rfkill_gpio_probe(struct platform_device *pdev)
{
struct rfkill_gpio_platform_data *pdata = pdev->dev.platform_data;
@@ -96,6 +109,10 @@ static int rfkill_gpio_probe(struct platform_device *pdev)
ret = rfkill_gpio_acpi_probe(&pdev->dev, rfkill);
if (ret)
return ret;
+ } else if (&pdev->dev.of_node) {
+ ret = rfkill_gpio_dt_probe(&pdev->dev, rfkill);
+ if (ret)
+ return ret;
} else if (pdata) {
rfkill->name = pdata->name;
rfkill->type = pdata->type;
@@ -167,6 +184,11 @@ static const struct acpi_device_id rfkill_acpi_match[] = {
};
#endif

+static const struct of_device_id rfkill_of_match[] = {
+ { .compatible = "rfkill-gpio", },
+ {},
+};
+
static struct platform_driver rfkill_gpio_driver = {
.probe = rfkill_gpio_probe,
.remove = rfkill_gpio_remove,
@@ -174,6 +196,7 @@ static struct platform_driver rfkill_gpio_driver = {
.name = "rfkill_gpio",
.owner = THIS_MODULE,
.acpi_match_table = ACPI_PTR(rfkill_acpi_match),
+ .of_match_table = of_match_ptr(rfkill_of_match),
},
};

--
1.9.1


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