Some devices, such as Broadcom Bluetooth devices, require a specific
clock rate for the clock tied to the rfkill device. Add clock-frequency
property so we can specify this from the device tree.
Signed-off-by: Chen-Yu Tsai <wens@xxxxxxxx>
---
Documentation/devicetree/bindings/rfkill/rfkill-gpio.txt | 2 ++
net/rfkill/rfkill-gpio.c | 4 ++++
2 files changed, 6 insertions(+)
diff --git a/Documentation/devicetree/bindings/rfkill/rfkill-gpio.txt b/Documentation/devicetree/bindings/rfkill/rfkill-gpio.txt
index 8a07ea4..8b8db0a 100644
--- a/Documentation/devicetree/bindings/rfkill/rfkill-gpio.txt
+++ b/Documentation/devicetree/bindings/rfkill/rfkill-gpio.txt
@@ -13,6 +13,7 @@ NAME_reset-gpios, or both, must be defined.
Optional properties:
- clocks : phandle to clock to enable/disable
+- clock-frequency : clock rate to set for the given clock
Example:
@@ -23,4 +24,5 @@ Example:
bluetooth_shutdown-gpios = <0>, <&pio 7 18 0>;
bluetooth_reset-gpios = <&pio 7 24 0>;
clocks = <&clk_out_a>;
+ clock-frequency = <32678>;
};
diff --git a/net/rfkill/rfkill-gpio.c b/net/rfkill/rfkill-gpio.c
index 48381a8..3092681 100644
--- a/net/rfkill/rfkill-gpio.c
+++ b/net/rfkill/rfkill-gpio.c
@@ -40,6 +40,7 @@ struct rfkill_gpio_data {
char *reset_name;
char *shutdown_name;
struct clk *clk;
+ int clk_frequency;
bool clk_enabled;
};
@@ -92,6 +93,7 @@ static int rfkill_gpio_dt_probe(struct device *dev,
rfkill->name = np->name;
of_property_read_string(np, "rfkill-name", &rfkill->name);
of_property_read_u32(np, "rfkill-type", &rfkill->type);
+ of_property_read_u32(np, "clock-frequency", &rfkill->clk_frequency);
return 0;
}
@@ -138,6 +140,8 @@ static int rfkill_gpio_probe(struct platform_device *pdev)
snprintf(rfkill->shutdown_name, len + 10, "%s_shutdown", rfkill->name);
rfkill->clk = devm_clk_get(&pdev->dev, clk_name);
+ if (!IS_ERR(rfkill->clk) && rfkill->clk_frequency > 0)
+ clk_set_rate(rfkill->clk, rfkill->clk_frequency);
gpio = devm_gpiod_get_index(&pdev->dev, rfkill->reset_name, 0);
if (!IS_ERR(gpio)) {
--
1.8.5.2
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