Hi Linus,
On Wed, Feb 04, 2015 at 11:12:44AM +0100, Linus Walleij wrote:
> From: Dmitry Artamonow <mad_s...@inbox.ru>
>
> This adds a key input driver for the keys found on the h3xxx
> iPAQ series.
>
> Based on a driver from handhelds.org 2.6.21 kernel, written
> by Alessandro GARDICH.
>
> Signed-off-by: Alessandro GARDICH <grem...@gremlin.it>
> Signed-off-by: Dmitry Artamonow <mad_s...@inbox.ru>
> Signed-off-by: Linus Walleij <linus.wall...@linaro.org>
> ---
> Hi Dmitry (Torokhov), I have a vague memory of having sent
> this patch before but can't find it in my mail archives.
> So I'm guessing I never sent it properly :P
> ---
> drivers/input/keyboard/Kconfig | 7 ++
> drivers/input/keyboard/Makefile | 1 +
> drivers/input/keyboard/ipaq-micro-keys.c | 148
> +++++++++++++++++++++++++++++++
> 3 files changed, 156 insertions(+)
> create mode 100644 drivers/input/keyboard/ipaq-micro-keys.c
>
> diff --git a/drivers/input/keyboard/Kconfig b/drivers/input/keyboard/Kconfig
> index a5d9b3f3c871..043b720b500d 100644
> --- a/drivers/input/keyboard/Kconfig
> +++ b/drivers/input/keyboard/Kconfig
> @@ -578,6 +578,13 @@ config KEYBOARD_DAVINCI
> To compile this driver as a module, choose M here: the
> module will be called davinci_keyscan.
>
> +config KEYBOARD_IPAQ_MICRO
> + tristate "Buttons on Micro SoC (iPaq h3100,h3600,h3700)"
> + depends on MFD_IPAQ_MICRO
> + help
> + This enables support for the buttons attached to
> + Micro peripheral controller on iPAQ h3100/h3600/h3700
> +
To compile this driver as a module ...
> config KEYBOARD_OMAP
> tristate "TI OMAP keypad support"
> depends on ARCH_OMAP1
> diff --git a/drivers/input/keyboard/Makefile b/drivers/input/keyboard/Makefile
> index febafa527eb6..c59e73bdd260 100644
> --- a/drivers/input/keyboard/Makefile
> +++ b/drivers/input/keyboard/Makefile
> @@ -23,6 +23,7 @@ obj-$(CONFIG_KEYBOARD_TCA6416) +=
> tca6416-keypad.o
> obj-$(CONFIG_KEYBOARD_TCA8418) += tca8418_keypad.o
> obj-$(CONFIG_KEYBOARD_HIL) += hil_kbd.o
> obj-$(CONFIG_KEYBOARD_HIL_OLD) += hilkbd.o
> +obj-$(CONFIG_KEYBOARD_IPAQ_MICRO) += ipaq-micro-keys.o
> obj-$(CONFIG_KEYBOARD_IMX) += imx_keypad.o
> obj-$(CONFIG_KEYBOARD_HP6XX) += jornada680_kbd.o
> obj-$(CONFIG_KEYBOARD_HP7XX) += jornada720_kbd.o
> diff --git a/drivers/input/keyboard/ipaq-micro-keys.c
> b/drivers/input/keyboard/ipaq-micro-keys.c
> new file mode 100644
> index 000000000000..7ca8b738cc73
> --- /dev/null
> +++ b/drivers/input/keyboard/ipaq-micro-keys.c
> @@ -0,0 +1,148 @@
> +/*
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License version 2 as
> + * published by the Free Software Foundation.
> + *
> + * h3600 atmel micro companion support, key subdevice
> + * based on previous kernel 2.4 version
> + * Author : Alessandro Gardich <grem...@gremlin.it>
> + * Author : Linus Walleij <linus.wall...@linaro.org>
> + *
> + */
> +
> +
> +#include <linux/module.h>
> +#include <linux/version.h>
I do not think you need this.
> +
> +#include <linux/init.h>
> +#include <linux/fs.h>
> +#include <linux/interrupt.h>
> +#include <linux/sched.h>
> +#include <linux/pm.h>
> +#include <linux/sysctl.h>
> +#include <linux/proc_fs.h>
> +#include <linux/delay.h>
> +#include <linux/device.h>
> +#include <linux/input.h>
> +#include <linux/platform_device.h>
> +#include <linux/mfd/ipaq-micro.h>
> +
> +struct ipaq_micro_keys {
> + struct ipaq_micro *micro;
> + struct input_dev *input;
> +};
> +
> +static int keycodes[] = {
const.
> + KEY_RECORD, /* 1: Record button */
> + KEY_CALENDAR, /* 2: Calendar */
> + KEY_ADDRESSBOOK, /* 3: Contacts (looks like Outlook) */
> + KEY_MAIL, /* 4: Envelope (Q on older iPAQs) */
> + KEY_HOMEPAGE, /* 5: Start (looks like swoopy arrow) */
> + KEY_UP, /* 6: Up */
> + KEY_RIGHT, /* 7: Right */
> + KEY_LEFT, /* 8: Left */
> + KEY_DOWN, /* 9: Down */
> +};
> +
> +static void micro_key_receive(void *data, int len, unsigned char *msg)
> +{
> + struct ipaq_micro_keys *keys = data;
> + int key, down;
> +
> + down = (0x80 & msg[0]) ? 1 : 0;
input_report_key also converts to bool so just use "msg[0] & 0x80"
directly.
> + key = 0x7f & msg[0];
> +
> + if (key < ARRAY_SIZE(keycodes)) {
> + input_report_key(keys->input, keycodes[key], down);
Please copy keycodes into ipaq_micro_keys structurei (make it u16 BTW),
set up input_dev->keycode, keycodemax and keycodesize.
> + input_sync(keys->input);
> + }
> +}
> +
> +static int micro_key_probe(struct platform_device *pdev)
> +{
> + struct ipaq_micro_keys *keys;
> + int ret;
> + int i;
> +
> + keys = devm_kzalloc(&pdev->dev, sizeof(*keys), GFP_KERNEL);
> + if (!keys)
> + return -ENOMEM;
> + keys->input = input_allocate_device();
> + if (!keys->input)
> + return -ENOMEM;
> + keys->micro = dev_get_drvdata(pdev->dev.parent);
> + keys->input->evbit[0] = BIT(EV_KEY);
> + set_bit(EV_KEY, keys->input->evbit);
> + for (i = 0; i < ARRAY_SIZE(keycodes); i++)
> + set_bit(keycodes[i], keys->input->keybit);
> +
> + keys->input->name = "h3600 micro keys";
> +
> + ret = input_register_device(keys->input);
> + if (ret)
> + return ret;
Since you are not using devm_input_allocate_device() you are leaking
input device here.
> +
> + platform_set_drvdata(pdev, keys);
> + spin_lock(&keys->micro->lock);
> + keys->micro->key = micro_key_receive;
> + keys->micro->key_data = keys;
> + spin_unlock(&keys->micro->lock);
Please split it off, you seem to be using it in a few places. BTW maybe
put in into input_dev->open()?
> +
> + return 0;
> +}
> +
> +static int micro_key_remove(struct platform_device *pdev)
> +{
> + struct ipaq_micro_keys *keys = platform_get_drvdata(pdev);
> +
> + input_unregister_device(keys->input);
Nope, if key->input disappears and a keypress arrives you'll crash here.
> +
> + spin_lock(&keys->micro->lock);
> + keys->micro->key = NULL;
> + keys->micro->key_data = NULL;
> + spin_unlock(&keys->micro->lock);
Best place for this would be in input_dev->close().
> +
> + return 0;
> +}
> +
> +static int micro_key_suspend(struct device *dev)
__maybe_unused
> +{
> + struct ipaq_micro_keys *keys = dev_get_drvdata(dev);
> +
> + spin_lock(&keys->micro->lock);
> + keys->micro->key = NULL;
> + keys->micro->key_data = NULL;
> + spin_unlock(&keys->micro->lock);
> +
> + return 0;
> +}
> +
> +static int micro_key_resume(struct device *dev)
__maybe_unused
> +{
> + struct ipaq_micro_keys *keys = dev_get_drvdata(dev);
> +
> + spin_lock(&keys->micro->lock);
> + keys->micro->key = micro_key_receive;
> + keys->micro->key_data = keys;
> + spin_unlock(&keys->micro->lock);
> +
> + return 0;
> +}
> +
> +static const struct dev_pm_ops micro_key_dev_pm_ops = {
> + SET_SYSTEM_SLEEP_PM_OPS(micro_key_suspend, micro_key_resume)
> +};
SIMPLE_DEV_PM_OPS().
> +
> +struct platform_driver micro_key_device_driver = {
> + .driver = {
> + .name = "ipaq-micro-keys",
> + .pm = µ_key_dev_pm_ops,
> + },
> + .probe = micro_key_probe,
> + .remove = micro_key_remove,
> +};
> +module_platform_driver(micro_key_device_driver);
> +
> +MODULE_LICENSE("GPL");
> +MODULE_DESCRIPTION("driver for iPAQ Atmel micro keys");
> +MODULE_ALIAS("platform:ipaq-micro-keys");
> --
> 1.9.3
>
Thanks.
--
Dmitry
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