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| author | Guan Ben <ben.guan@cn.bosch.com> | 2017-03-07 21:25:27 +0300 |
|---|---|---|
| committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2017-03-07 21:39:23 +0300 |
| commit | fad358a06c51bd40a131f4f94711c46e5d77cdae (patch) | |
| tree | 23c53b729024d3eaf2f7563ec09f328682555e78 | |
| parent | a3cbfd56ff909393e2d59236d94205ae17dfc5d5 (diff) | |
| download | linux-fad358a06c51bd40a131f4f94711c46e5d77cdae.tar.xz | |
Input: pwm-beeper - support customized freq for SND_BELL
Extend the pwm-beeper driver to support customized frequency for SND_BELL
from device properties.
Signed-off-by: Guan Ben <ben.guan@cn.bosch.com>
Signed-off-by: Mark Jonas <mark.jonas@de.bosch.com>
Signed-off-by: Heiko Schocher <hs@denx.de>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
| -rw-r--r-- | Documentation/devicetree/bindings/input/pwm-beeper.txt | 1 | ||||
| -rw-r--r-- | drivers/input/misc/pwm-beeper.c | 15 |
2 files changed, 15 insertions, 1 deletions
diff --git a/Documentation/devicetree/bindings/input/pwm-beeper.txt b/Documentation/devicetree/bindings/input/pwm-beeper.txt index 529408b4431a..8fc0e48c20db 100644 --- a/Documentation/devicetree/bindings/input/pwm-beeper.txt +++ b/Documentation/devicetree/bindings/input/pwm-beeper.txt @@ -8,6 +8,7 @@ Required properties: Optional properties: - amp-supply: phandle to a regulator that acts as an amplifier for the beeper +- beeper-hz: bell frequency in Hz Example: diff --git a/drivers/input/misc/pwm-beeper.c b/drivers/input/misc/pwm-beeper.c index e53801dbd560..edca0d737750 100644 --- a/drivers/input/misc/pwm-beeper.c +++ b/drivers/input/misc/pwm-beeper.c @@ -19,6 +19,7 @@ #include <linux/kernel.h> #include <linux/of.h> #include <linux/platform_device.h> +#include <linux/property.h> #include <linux/pwm.h> #include <linux/slab.h> #include <linux/workqueue.h> @@ -29,6 +30,7 @@ struct pwm_beeper { struct regulator *amplifier; struct work_struct work; unsigned long period; + unsigned int bell_frequency; bool suspended; bool amplifier_on; }; @@ -94,7 +96,7 @@ static int pwm_beeper_event(struct input_dev *input, switch (code) { case SND_BELL: - value = value ? 1000 : 0; + value = value ? beeper->bell_frequency : 0; break; case SND_TONE: break; @@ -131,6 +133,7 @@ static int pwm_beeper_probe(struct platform_device *pdev) struct device *dev = &pdev->dev; struct pwm_beeper *beeper; struct pwm_state state; + u32 bell_frequency; int error; beeper = devm_kzalloc(dev, sizeof(*beeper), GFP_KERNEL); @@ -167,6 +170,16 @@ static int pwm_beeper_probe(struct platform_device *pdev) INIT_WORK(&beeper->work, pwm_beeper_work); + error = device_property_read_u32(dev, "beeper-hz", &bell_frequency); + if (error) { + bell_frequency = 1000; + dev_dbg(dev, + "failed to parse 'beeper-hz' property, using default: %uHz\n", + bell_frequency); + } + + beeper->bell_frequency = bell_frequency; + beeper->input = devm_input_allocate_device(dev); if (!beeper->input) { dev_err(dev, "Failed to allocate input device\n"); |