mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-26 19:00:25 +00:00
![Arnd Bergmann](/assets/img/avatar_default.png)
When CONFIG_GPIOLIB is not set, we get a couple of build
errors during test building:
drivers/input/misc/msm-vibrator.c: In function 'msm_vibrator_start':
drivers/input/misc/msm-vibrator.c:79:3: error: implicit declaration of function 'gpiod_set_value_cansleep'; did you mean 'gpio_set_value_cansleep'? [-Werror=implicit-function-declaration]
gpiod_set_value_cansleep(vibrator->enable_gpio, 1);
^~~~~~~~~~~~~~~~~~~~~~~~
gpio_set_value_cansleep
drivers/input/misc/msm-vibrator.c: In function 'msm_vibrator_probe':
drivers/input/misc/msm-vibrator.c:176:26: error: implicit declaration of function 'devm_gpiod_get'; did you mean 'devm_gpio_free'? [-Werror=implicit-function-declaration]
vibrator->enable_gpio = devm_gpiod_get(&pdev->dev, "enable",
^~~~~~~~~~~~~~
devm_gpio_free
drivers/input/misc/msm-vibrator.c:177:13: error: 'GPIOD_OUT_LOW' undeclared (first use in this function); did you mean 'GPIOF_INIT_LOW'?
GPIOD_OUT_LOW);
^~~~~~~~~~~~~
GPIOF_INIT_LOW
drivers/input/misc/msm-vibrator.c:177:13: note: each undeclared identifier is reported only once for each function it appears in
This is easy to avoid when we use gpio/consumer.h as the documented interface.
Fixes: 0f681d09e6
("Input: add new vibrator driver for various MSM SOCs")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
281 lines
6.9 KiB
C
281 lines
6.9 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* Qualcomm MSM vibrator driver
|
|
*
|
|
* Copyright (c) 2018 Brian Masney <masneyb@onstation.org>
|
|
*
|
|
* Based on qcom,pwm-vibrator.c from:
|
|
* Copyright (c) 2018 Jonathan Marek <jonathan@marek.ca>
|
|
*
|
|
* Based on msm_pwm_vibrator.c from downstream Android sources:
|
|
* Copyright (C) 2009-2014 LGE, Inc.
|
|
*/
|
|
|
|
#include <linux/clk.h>
|
|
#include <linux/err.h>
|
|
#include <linux/gpio/consumer.h>
|
|
#include <linux/input.h>
|
|
#include <linux/io.h>
|
|
#include <linux/module.h>
|
|
#include <linux/of.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/regulator/consumer.h>
|
|
|
|
#define REG_CMD_RCGR 0x00
|
|
#define REG_CFG_RCGR 0x04
|
|
#define REG_M 0x08
|
|
#define REG_N 0x0C
|
|
#define REG_D 0x10
|
|
#define REG_CBCR 0x24
|
|
#define MMSS_CC_M_DEFAULT 1
|
|
|
|
struct msm_vibrator {
|
|
struct input_dev *input;
|
|
struct mutex mutex;
|
|
struct work_struct worker;
|
|
void __iomem *base;
|
|
struct regulator *vcc;
|
|
struct clk *clk;
|
|
struct gpio_desc *enable_gpio;
|
|
u16 magnitude;
|
|
bool enabled;
|
|
};
|
|
|
|
static void msm_vibrator_write(struct msm_vibrator *vibrator, int offset,
|
|
u32 value)
|
|
{
|
|
writel(value, vibrator->base + offset);
|
|
}
|
|
|
|
static int msm_vibrator_start(struct msm_vibrator *vibrator)
|
|
{
|
|
int d_reg_val, ret = 0;
|
|
|
|
mutex_lock(&vibrator->mutex);
|
|
|
|
if (!vibrator->enabled) {
|
|
ret = clk_set_rate(vibrator->clk, 24000);
|
|
if (ret) {
|
|
dev_err(&vibrator->input->dev,
|
|
"Failed to set clock rate: %d\n", ret);
|
|
goto unlock;
|
|
}
|
|
|
|
ret = clk_prepare_enable(vibrator->clk);
|
|
if (ret) {
|
|
dev_err(&vibrator->input->dev,
|
|
"Failed to enable clock: %d\n", ret);
|
|
goto unlock;
|
|
}
|
|
|
|
ret = regulator_enable(vibrator->vcc);
|
|
if (ret) {
|
|
dev_err(&vibrator->input->dev,
|
|
"Failed to enable regulator: %d\n", ret);
|
|
clk_disable(vibrator->clk);
|
|
goto unlock;
|
|
}
|
|
|
|
gpiod_set_value_cansleep(vibrator->enable_gpio, 1);
|
|
|
|
vibrator->enabled = true;
|
|
}
|
|
|
|
d_reg_val = 127 - ((126 * vibrator->magnitude) / 0xffff);
|
|
msm_vibrator_write(vibrator, REG_CFG_RCGR,
|
|
(2 << 12) | /* dual edge mode */
|
|
(0 << 8) | /* cxo */
|
|
(7 << 0));
|
|
msm_vibrator_write(vibrator, REG_M, 1);
|
|
msm_vibrator_write(vibrator, REG_N, 128);
|
|
msm_vibrator_write(vibrator, REG_D, d_reg_val);
|
|
msm_vibrator_write(vibrator, REG_CMD_RCGR, 1);
|
|
msm_vibrator_write(vibrator, REG_CBCR, 1);
|
|
|
|
unlock:
|
|
mutex_unlock(&vibrator->mutex);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void msm_vibrator_stop(struct msm_vibrator *vibrator)
|
|
{
|
|
mutex_lock(&vibrator->mutex);
|
|
|
|
if (vibrator->enabled) {
|
|
gpiod_set_value_cansleep(vibrator->enable_gpio, 0);
|
|
regulator_disable(vibrator->vcc);
|
|
clk_disable(vibrator->clk);
|
|
vibrator->enabled = false;
|
|
}
|
|
|
|
mutex_unlock(&vibrator->mutex);
|
|
}
|
|
|
|
static void msm_vibrator_worker(struct work_struct *work)
|
|
{
|
|
struct msm_vibrator *vibrator = container_of(work,
|
|
struct msm_vibrator,
|
|
worker);
|
|
|
|
if (vibrator->magnitude)
|
|
msm_vibrator_start(vibrator);
|
|
else
|
|
msm_vibrator_stop(vibrator);
|
|
}
|
|
|
|
static int msm_vibrator_play_effect(struct input_dev *dev, void *data,
|
|
struct ff_effect *effect)
|
|
{
|
|
struct msm_vibrator *vibrator = input_get_drvdata(dev);
|
|
|
|
mutex_lock(&vibrator->mutex);
|
|
|
|
if (effect->u.rumble.strong_magnitude > 0)
|
|
vibrator->magnitude = effect->u.rumble.strong_magnitude;
|
|
else
|
|
vibrator->magnitude = effect->u.rumble.weak_magnitude;
|
|
|
|
mutex_unlock(&vibrator->mutex);
|
|
|
|
schedule_work(&vibrator->worker);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void msm_vibrator_close(struct input_dev *input)
|
|
{
|
|
struct msm_vibrator *vibrator = input_get_drvdata(input);
|
|
|
|
cancel_work_sync(&vibrator->worker);
|
|
msm_vibrator_stop(vibrator);
|
|
}
|
|
|
|
static int msm_vibrator_probe(struct platform_device *pdev)
|
|
{
|
|
struct msm_vibrator *vibrator;
|
|
struct resource *res;
|
|
int ret;
|
|
|
|
vibrator = devm_kzalloc(&pdev->dev, sizeof(*vibrator), GFP_KERNEL);
|
|
if (!vibrator)
|
|
return -ENOMEM;
|
|
|
|
vibrator->input = devm_input_allocate_device(&pdev->dev);
|
|
if (!vibrator->input)
|
|
return -ENOMEM;
|
|
|
|
vibrator->vcc = devm_regulator_get(&pdev->dev, "vcc");
|
|
if (IS_ERR(vibrator->vcc)) {
|
|
if (PTR_ERR(vibrator->vcc) != -EPROBE_DEFER)
|
|
dev_err(&pdev->dev, "Failed to get regulator: %ld\n",
|
|
PTR_ERR(vibrator->vcc));
|
|
return PTR_ERR(vibrator->vcc);
|
|
}
|
|
|
|
vibrator->enable_gpio = devm_gpiod_get(&pdev->dev, "enable",
|
|
GPIOD_OUT_LOW);
|
|
if (IS_ERR(vibrator->enable_gpio)) {
|
|
if (PTR_ERR(vibrator->enable_gpio) != -EPROBE_DEFER)
|
|
dev_err(&pdev->dev, "Failed to get enable gpio: %ld\n",
|
|
PTR_ERR(vibrator->enable_gpio));
|
|
return PTR_ERR(vibrator->enable_gpio);
|
|
}
|
|
|
|
vibrator->clk = devm_clk_get(&pdev->dev, "pwm");
|
|
if (IS_ERR(vibrator->clk)) {
|
|
if (PTR_ERR(vibrator->clk) != -EPROBE_DEFER)
|
|
dev_err(&pdev->dev, "Failed to lookup pwm clock: %ld\n",
|
|
PTR_ERR(vibrator->clk));
|
|
return PTR_ERR(vibrator->clk);
|
|
}
|
|
|
|
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
|
if (!res) {
|
|
dev_err(&pdev->dev, "Failed to get platform resource\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
vibrator->base = devm_ioremap(&pdev->dev, res->start,
|
|
resource_size(res));
|
|
if (!vibrator->base) {
|
|
dev_err(&pdev->dev, "Failed to iomap resource.\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
vibrator->enabled = false;
|
|
mutex_init(&vibrator->mutex);
|
|
INIT_WORK(&vibrator->worker, msm_vibrator_worker);
|
|
|
|
vibrator->input->name = "msm-vibrator";
|
|
vibrator->input->id.bustype = BUS_HOST;
|
|
vibrator->input->close = msm_vibrator_close;
|
|
|
|
input_set_drvdata(vibrator->input, vibrator);
|
|
input_set_capability(vibrator->input, EV_FF, FF_RUMBLE);
|
|
|
|
ret = input_ff_create_memless(vibrator->input, NULL,
|
|
msm_vibrator_play_effect);
|
|
if (ret) {
|
|
dev_err(&pdev->dev, "Failed to create ff memless: %d", ret);
|
|
return ret;
|
|
}
|
|
|
|
ret = input_register_device(vibrator->input);
|
|
if (ret) {
|
|
dev_err(&pdev->dev, "Failed to register input device: %d", ret);
|
|
return ret;
|
|
}
|
|
|
|
platform_set_drvdata(pdev, vibrator);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int __maybe_unused msm_vibrator_suspend(struct device *dev)
|
|
{
|
|
struct platform_device *pdev = to_platform_device(dev);
|
|
struct msm_vibrator *vibrator = platform_get_drvdata(pdev);
|
|
|
|
cancel_work_sync(&vibrator->worker);
|
|
|
|
if (vibrator->enabled)
|
|
msm_vibrator_stop(vibrator);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int __maybe_unused msm_vibrator_resume(struct device *dev)
|
|
{
|
|
struct platform_device *pdev = to_platform_device(dev);
|
|
struct msm_vibrator *vibrator = platform_get_drvdata(pdev);
|
|
|
|
if (vibrator->enabled)
|
|
msm_vibrator_start(vibrator);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static SIMPLE_DEV_PM_OPS(msm_vibrator_pm_ops, msm_vibrator_suspend,
|
|
msm_vibrator_resume);
|
|
|
|
static const struct of_device_id msm_vibrator_of_match[] = {
|
|
{ .compatible = "qcom,msm8226-vibrator" },
|
|
{ .compatible = "qcom,msm8974-vibrator" },
|
|
{},
|
|
};
|
|
MODULE_DEVICE_TABLE(of, msm_vibrator_of_match);
|
|
|
|
static struct platform_driver msm_vibrator_driver = {
|
|
.probe = msm_vibrator_probe,
|
|
.driver = {
|
|
.name = "msm-vibrator",
|
|
.pm = &msm_vibrator_pm_ops,
|
|
.of_match_table = of_match_ptr(msm_vibrator_of_match),
|
|
},
|
|
};
|
|
module_platform_driver(msm_vibrator_driver);
|
|
|
|
MODULE_AUTHOR("Brian Masney <masneyb@onstation.org>");
|
|
MODULE_DESCRIPTION("Qualcomm MSM vibrator driver");
|
|
MODULE_LICENSE("GPL");
|