From: Dmitry Torokhov <dmitry.torokhov@gmail.com>
To: Luca Weiss <luca@z3ntu.xyz>
Cc: Rob Herring <robh+dt@kernel.org>,
Mark Rutland <mark.rutland@arm.com>,
Mauro Carvalho Chehab <mchehab+samsung@kernel.org>,
Pascal PAILLET-LME <p.paillet@st.com>, Coly Li <colyli@suse.de>,
Lee Jones <lee.jones@linaro.org>,
Xiaotong Lu <xiaotong.lu@spreadtrum.com>,
Brian Masney <masneyb@onstation.org>,
Rob Herring <robh@kernel.org>,
Baolin Wang <baolin.wang@linaro.org>,
David Brown <david.brown@linaro.org>,
"open list:ARM/QUALCOMM SUPPORT" <linux-arm-msm@vger.kernel.org>,
"open list:INPUT (KEYBOARD, MOUSE, JOYSTICK,
TOUCHSCREEN)..." <linux-input@vger.kernel.org>,
"open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS"
<devicetree@vger.kernel.org>,
open list <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH v5 2/3] Input: add a driver for GPIO controllable vibrators
Date: Tue, 30 Apr 2019 00:14:57 -0700 [thread overview]
Message-ID: <20190430071457.GA148015@dtor-ws> (raw)
In-Reply-To: <20190426194747.22256-2-luca@z3ntu.xyz>
On Fri, Apr 26, 2019 at 09:47:46PM +0200, Luca Weiss wrote:
> Provide a simple driver for GPIO controllable vibrators.
> It will be used by the Fairphone 2.
>
> Signed-off-by: Luca Weiss <luca@z3ntu.xyz>
Applied, thank you.
> ---
> drivers/input/misc/Kconfig | 12 ++
> drivers/input/misc/Makefile | 1 +
> drivers/input/misc/gpio-vibra.c | 209 ++++++++++++++++++++++++++++++++
> 3 files changed, 222 insertions(+)
> create mode 100644 drivers/input/misc/gpio-vibra.c
>
> diff --git a/drivers/input/misc/Kconfig b/drivers/input/misc/Kconfig
> index e15ed1bb8558..6dfe9e2fe5b1 100644
> --- a/drivers/input/misc/Kconfig
> +++ b/drivers/input/misc/Kconfig
> @@ -290,6 +290,18 @@ config INPUT_GPIO_DECODER
> To compile this driver as a module, choose M here: the module
> will be called gpio_decoder.
>
> +config INPUT_GPIO_VIBRA
> + tristate "GPIO vibrator support"
> + depends on GPIOLIB || COMPILE_TEST
> + select INPUT_FF_MEMLESS
> + help
> + Say Y here to get support for GPIO based vibrator devices.
> +
> + If unsure, say N.
> +
> + To compile this driver as a module, choose M here: the module will be
> + called gpio-vibra.
> +
> config INPUT_IXP4XX_BEEPER
> tristate "IXP4XX Beeper support"
> depends on ARCH_IXP4XX
> diff --git a/drivers/input/misc/Makefile b/drivers/input/misc/Makefile
> index b936c5b1d4ac..f38ebbdb05e2 100644
> --- a/drivers/input/misc/Makefile
> +++ b/drivers/input/misc/Makefile
> @@ -36,6 +36,7 @@ obj-$(CONFIG_INPUT_DRV2667_HAPTICS) += drv2667.o
> obj-$(CONFIG_INPUT_GP2A) += gp2ap002a00f.o
> obj-$(CONFIG_INPUT_GPIO_BEEPER) += gpio-beeper.o
> obj-$(CONFIG_INPUT_GPIO_DECODER) += gpio_decoder.o
> +obj-$(CONFIG_INPUT_GPIO_VIBRA) += gpio-vibra.o
> obj-$(CONFIG_INPUT_HISI_POWERKEY) += hisi_powerkey.o
> obj-$(CONFIG_HP_SDC_RTC) += hp_sdc_rtc.o
> obj-$(CONFIG_INPUT_IMS_PCU) += ims-pcu.o
> diff --git a/drivers/input/misc/gpio-vibra.c b/drivers/input/misc/gpio-vibra.c
> new file mode 100644
> index 000000000000..b76c81015de9
> --- /dev/null
> +++ b/drivers/input/misc/gpio-vibra.c
> @@ -0,0 +1,209 @@
> +// SPDX-License-Identifier: GPL-2.0+
> +/*
> + * GPIO vibrator driver
> + *
> + * Copyright (C) 2019 Luca Weiss <luca@z3ntu.xyz>
> + *
> + * Based on PWM vibrator driver:
> + * Copyright (C) 2017 Collabora Ltd.
> + *
> + * Based on previous work from:
> + * Copyright (C) 2012 Dmitry Torokhov <dmitry.torokhov@gmail.com>
> + *
> + * Based on PWM beeper driver:
> + * 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>
> +#include <linux/of_device.h>
> +#include <linux/platform_device.h>
> +#include <linux/property.h>
> +#include <linux/regulator/consumer.h>
> +#include <linux/slab.h>
> +
> +struct gpio_vibrator {
> + struct input_dev *input;
> + struct gpio_desc *gpio;
> + struct regulator *vcc;
> +
> + struct work_struct play_work;
> + bool running;
> + bool vcc_on;
> +};
> +
> +static int gpio_vibrator_start(struct gpio_vibrator *vibrator)
> +{
> + struct device *pdev = vibrator->input->dev.parent;
> + int err;
> +
> + if (!vibrator->vcc_on) {
> + err = regulator_enable(vibrator->vcc);
> + if (err) {
> + dev_err(pdev, "failed to enable regulator: %d\n", err);
> + return err;
> + }
> + vibrator->vcc_on = true;
> + }
> +
> + gpiod_set_value_cansleep(vibrator->gpio, 1);
> +
> + return 0;
> +}
> +
> +static void gpio_vibrator_stop(struct gpio_vibrator *vibrator)
> +{
> + gpiod_set_value_cansleep(vibrator->gpio, 0);
> +
> + if (vibrator->vcc_on) {
> + regulator_disable(vibrator->vcc);
> + vibrator->vcc_on = false;
> + }
> +}
> +
> +static void gpio_vibrator_play_work(struct work_struct *work)
> +{
> + struct gpio_vibrator *vibrator =
> + container_of(work, struct gpio_vibrator, play_work);
> +
> + if (vibrator->running)
> + gpio_vibrator_start(vibrator);
> + else
> + gpio_vibrator_stop(vibrator);
> +}
> +
> +static int gpio_vibrator_play_effect(struct input_dev *dev, void *data,
> + struct ff_effect *effect)
> +{
> + struct gpio_vibrator *vibrator = input_get_drvdata(dev);
> +
> + int level = effect->u.rumble.strong_magnitude;
> +
> + if (!level)
> + level = effect->u.rumble.weak_magnitude;
> +
> + if (level)
> + vibrator->running = true;
> + else
> + vibrator->running = false;
> +
> + schedule_work(&vibrator->play_work);
> +
> + return 0;
> +}
> +
> +static void gpio_vibrator_close(struct input_dev *input)
> +{
> + struct gpio_vibrator *vibrator = input_get_drvdata(input);
> +
> + cancel_work_sync(&vibrator->play_work);
> + gpio_vibrator_stop(vibrator);
> + vibrator->running = false;
> +}
> +
> +static int gpio_vibrator_probe(struct platform_device *pdev)
> +{
> + struct gpio_vibrator *vibrator;
> + int err;
> +
> + 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");
> + err = PTR_ERR_OR_ZERO(vibrator->vcc);
> + if (err) {
> + if (err != -EPROBE_DEFER)
> + dev_err(&pdev->dev, "Failed to request regulator: %d\n",
> + err);
> + return err;
> + }
> +
> + vibrator->gpio = devm_gpiod_get(&pdev->dev, "enable", GPIOD_OUT_LOW);
> + err = PTR_ERR_OR_ZERO(vibrator->gpio);
> + if (err) {
> + if (err != -EPROBE_DEFER)
> + dev_err(&pdev->dev, "Failed to request main gpio: %d\n",
> + err);
> + return err;
> + }
> +
> + INIT_WORK(&vibrator->play_work, gpio_vibrator_play_work);
> +
> + vibrator->input->name = "gpio-vibrator";
> + vibrator->input->id.bustype = BUS_HOST;
> + vibrator->input->close = gpio_vibrator_close;
> +
> + input_set_drvdata(vibrator->input, vibrator);
> + input_set_capability(vibrator->input, EV_FF, FF_RUMBLE);
> +
> + err = input_ff_create_memless(vibrator->input, NULL,
> + gpio_vibrator_play_effect);
> + if (err) {
> + dev_err(&pdev->dev, "Couldn't create FF dev: %d\n", err);
> + return err;
> + }
> +
> + err = input_register_device(vibrator->input);
> + if (err) {
> + dev_err(&pdev->dev, "Couldn't register input dev: %d\n", err);
> + return err;
> + }
> +
> + platform_set_drvdata(pdev, vibrator);
> +
> + return 0;
> +}
> +
> +static int __maybe_unused gpio_vibrator_suspend(struct device *dev)
> +{
> + struct gpio_vibrator *vibrator = dev_get_drvdata(dev);
> +
> + cancel_work_sync(&vibrator->play_work);
> + if (vibrator->running)
> + gpio_vibrator_stop(vibrator);
> +
> + return 0;
> +}
> +
> +static int __maybe_unused gpio_vibrator_resume(struct device *dev)
> +{
> + struct gpio_vibrator *vibrator = dev_get_drvdata(dev);
> +
> + if (vibrator->running)
> + gpio_vibrator_start(vibrator);
> +
> + return 0;
> +}
> +
> +static SIMPLE_DEV_PM_OPS(gpio_vibrator_pm_ops,
> + gpio_vibrator_suspend, gpio_vibrator_resume);
> +
> +#ifdef CONFIG_OF
> +static const struct of_device_id gpio_vibra_dt_match_table[] = {
> + { .compatible = "gpio-vibrator" },
> + {}
> +};
> +MODULE_DEVICE_TABLE(of, gpio_vibra_dt_match_table);
> +#endif
> +
> +static struct platform_driver gpio_vibrator_driver = {
> + .probe = gpio_vibrator_probe,
> + .driver = {
> + .name = "gpio-vibrator",
> + .pm = &gpio_vibrator_pm_ops,
> + .of_match_table = of_match_ptr(gpio_vibra_dt_match_table),
> + },
> +};
> +module_platform_driver(gpio_vibrator_driver);
> +
> +MODULE_AUTHOR("Luca Weiss <luca@z3ntu.xy>");
> +MODULE_DESCRIPTION("GPIO vibrator driver");
> +MODULE_LICENSE("GPL");
> +MODULE_ALIAS("platform:gpio-vibrator");
> --
> 2.21.0
>
--
Dmitry
next prev parent reply other threads:[~2019-04-30 7:15 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-04-26 19:47 [PATCH v5 1/3] dt-bindings: input: add GPIO controllable vibrator Luca Weiss
2019-04-26 19:47 ` [PATCH v5 2/3] Input: add a driver for GPIO controllable vibrators Luca Weiss
2019-04-30 7:14 ` Dmitry Torokhov [this message]
2019-04-26 19:47 ` [PATCH v5 3/3] ARM: dts: msm8974-FP2: Add vibration motor Luca Weiss
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20190430071457.GA148015@dtor-ws \
--to=dmitry.torokhov@gmail.com \
--cc=baolin.wang@linaro.org \
--cc=colyli@suse.de \
--cc=david.brown@linaro.org \
--cc=devicetree@vger.kernel.org \
--cc=lee.jones@linaro.org \
--cc=linux-arm-msm@vger.kernel.org \
--cc=linux-input@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=luca@z3ntu.xyz \
--cc=mark.rutland@arm.com \
--cc=masneyb@onstation.org \
--cc=mchehab+samsung@kernel.org \
--cc=p.paillet@st.com \
--cc=robh+dt@kernel.org \
--cc=robh@kernel.org \
--cc=xiaotong.lu@spreadtrum.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).