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Input: pwm-vibra - add support for enable GPIO

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Some pwm vibrators have a dedicated enable GPIO that needs to be set
high so that the vibrator works. Add support for that optionally.

Signed-off-by: Luca Weiss <luca@z3ntu.xyz>
Reviewed-by: Brian Masney <bmasney@redhat.com>
Reviewed-by: Sebastian Reichel <sre@kernel.org>
Reviewed-by: Caleb Connolly <caleb.connolly@linaro.org>
Link: https://lore.kernel.org/r/20230427-hammerhead-vibra-v1-3-e87eeb94da51@z3ntu.xyz
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
This commit is contained in:
Luca Weiss 2023-05-08 09:41:54 -07:00 committed by Dmitry Torokhov
parent 29ebf697f1
commit bcf784985e
1 changed files with 16 additions and 0 deletions
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16
drivers/input/misc/pwm-vibra.c
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@ -11,6 +11,7 @@
* Copyright (C) 2010, Lars-Peter Clausen <lars@metafoo.de>
*/
#include <linux/gpio/consumer.h>
#include <linux/input.h>
#include <linux/kernel.h>
#include <linux/module.h>
@ -23,6 +24,7 @@
struct pwm_vibrator {
struct input_dev *input;
struct gpio_desc *enable_gpio;
struct pwm_device *pwm;
struct pwm_device *pwm_dir;
struct regulator *vcc;
@ -48,6 +50,8 @@ static int pwm_vibrator_start(struct pwm_vibrator *vibrator)
vibrator->vcc_on = true;
}
gpiod_set_value_cansleep(vibrator->enable_gpio, 1);
pwm_get_state(vibrator->pwm, &state);
pwm_set_relative_duty_cycle(&state, vibrator->level, 0xffff);
state.enabled = true;
@ -80,6 +84,8 @@ static void pwm_vibrator_stop(struct pwm_vibrator *vibrator)
pwm_disable(vibrator->pwm_dir);
pwm_disable(vibrator->pwm);
gpiod_set_value_cansleep(vibrator->enable_gpio, 0);
if (vibrator->vcc_on) {
regulator_disable(vibrator->vcc);
vibrator->vcc_on = false;
@ -142,6 +148,16 @@ static int pwm_vibrator_probe(struct platform_device *pdev)
return err;
}
vibrator->enable_gpio = devm_gpiod_get_optional(&pdev->dev, "enable",
GPIOD_OUT_LOW);
err = PTR_ERR_OR_ZERO(vibrator->enable_gpio);
if (err) {
if (err != -EPROBE_DEFER)
dev_err(&pdev->dev, "Failed to request enable gpio: %d\n",
err);
return err;
}
vibrator->pwm = devm_pwm_get(&pdev->dev, "enable");
err = PTR_ERR_OR_ZERO(vibrator->pwm);
if (err) {