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SubjectRe: [PATCH 3/3] ideapad: add hotkey support
On 11/18/2010 03:35 PM, Corentin Chary wrote:
> On Wed, Nov 17, 2010 at 10:29 PM, Dmitry Torokhov
> <dmitry.torokhov@gmail.com> wrote:
>> On Wed, Nov 17, 2010 at 03:00:38PM +0800, Ike Panhc wrote:
>>> Hotkey enabled by this patch:
>>> Fn+F3: Video mode switch
>>> Fn+F5: software rfkill for wifi
>>>
>>> For some ideapad when push Fn+F3, hardware generates Super-P keys, those key
>>> will not be enabled by this patch.
>>>
>>> Signed-off-by: Ike Panhc <ike.pan@canonical.com>
>>> ---
>>> drivers/platform/x86/ideapad-laptop.c | 74 +++++++++++++++++++++++++++++++++
>>> 1 files changed, 74 insertions(+), 0 deletions(-)
>>>
>>> diff --git a/drivers/platform/x86/ideapad-laptop.c b/drivers/platform/x86/ideapad-laptop.c
>>> index d75c21f..d397034 100644
>>> --- a/drivers/platform/x86/ideapad-laptop.c
>>> +++ b/drivers/platform/x86/ideapad-laptop.c
>>> @@ -28,6 +28,8 @@
>>> #include <acpi/acpi_drivers.h>
>>> #include <linux/rfkill.h>
>>> #include <linux/platform_device.h>
>>> +#include <linux/input.h>
>>> +#include <linux/input/sparse-keymap.h>
>>>
>>> #define IDEAPAD_DEV_CAMERA 0
>>> #define IDEAPAD_DEV_WLAN 1
>>> @@ -39,6 +41,7 @@ struct ideapad_private {
>>> acpi_handle handle;
>>> struct rfkill *rfk[5];
>>> struct platform_device *platform_device;
>>> + struct input_dev *inputdev;
>>> } *ideapad_priv;
>>>
>>> static struct {
>>> @@ -325,6 +328,68 @@ static void ideapad_platform_exit(void)
>>> }
>>> /* the above is platform device */
>>>
>>> +/*
>>> + * input device
>>> + */
>>> +static const struct key_entry ideapad_keymap[] = {
>>> + { KE_KEY, 0x06, { KEY_SWITCHVIDEOMODE } },
>>> + { KE_KEY, 0x0D, { KEY_WLAN } },
>>> + { KE_END, 0 },
>>> +};
>>> +
>>> +static int ideapad_input_init(void)
>>
>> __devinit?
>>
>>> +{
>>> + struct input_dev *inputdev;
>>> + int error;
>>> +
>>> + inputdev = input_allocate_device();
>>> + if (!inputdev) {
>>> + pr_info("Unable to allocate input device\n");
>>> + return -ENOMEM;
>>> + }
>>> +
>>> + inputdev->name = "Ideapad extra buttons";
>>> + inputdev->phys = "ideapad/input0";
>>> + inputdev->id.bustype = BUS_HOST;
>>> + inputdev->dev.parent = &ideapad_priv->platform_device->dev;
>>> +
>>> + error = sparse_keymap_setup(inputdev, ideapad_keymap, NULL);
>>> + if (error) {
>>> + pr_err("Unable to setup input device keymap\n");
>>> + goto err_free_dev;
>>> + }
>>> +
>>> + error = input_register_device(inputdev);
>>> + if (error) {
>>> + pr_err("Unable to register input device\n");
>>> + goto err_free_keymap;
>>> + }
>>> +
>>> + ideapad_priv->inputdev = inputdev;
>>
>> Why don't you pass ideapad_priv in as an argument instead of relying on
>> global. I know that there can only be one, but then why do you have a
>> structure?
>
> That may allow to remove the global later, like we did on
> eeepc-laptop/asus-laptop.

I am ok to go though the driver and try to avoid using global variable.

Other feedbacks is easy done, so I will fix them first..

>
>>> + return 0;
>>> +
>>> +err_free_keymap:
>>> + sparse_keymap_free(inputdev);
>>> +err_free_dev:
>>> + input_free_device(inputdev);
>>> + return error;
>>> +}
>>> +
>>> +static void ideapad_input_exit(void)
>>
>> __devexit? The rest of the driver might user these markups as well.
>>
>>> +{
>>> + if (ideapad_priv->inputdev) {
>>> + sparse_keymap_free(ideapad_priv->inputdev);
>>> + input_unregister_device(ideapad_priv->inputdev);
>>> + }
>>> + ideapad_priv->inputdev = NULL;
>>
>> You fail driver initialization when ideapad_input_init() fails so there
>> is no point in checking whether ideapad_priv->inputdev is null or not.
>>
>> Otherwise looks good from input POV.
>>
>> Thanks.
>
>
>



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