linux-kernel - Re: Input: add MAX7359 key switch controller driver

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Date:	Wed, 6 May 2009 19:08:25 +0530
From:	Trilok Soni <soni.trilok@...il.com>
To:	Kim Kyuwon <q1.kim@...sung.com>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	linux-input@...r.kernel.org,
	Kyungmin Park <kyungmin.park@...sung.com>,
	Marek Szyprowski <m.szyprowski@...sung.com>,
	linux-i2c@...r.kernel.org, Jean Delvare <khali@...ux-fr.org>
Subject: Re: Input: add MAX7359 key switch controller driver

Hi Kim,

On Wed, May 6, 2009 at 11:51 AM, Kim Kyuwon <q1.kim@...sung.com> wrote:
> The Maxim MAX7359 is a I2C interfaced key switch controller which provides microprocessors with management of up to 64 key switches.
> This patch adds support for the MAX7359 key switch controller.
>

Could you please restrict the commit text line to 80/72 columns? It
will look good.

> +static irqreturn_t max7359_interrupt(int irq, void *dev_id)
> +{
> +       struct max7359_keypad *keypad = (struct max7359_keypad *) dev_id;

No need of casting. Please remove.

> +
> +       if (!work_pending(&keypad->work)) {
> +               disable_irq_nosync(keypad->irq);
> +               schedule_work(&keypad->work);
> +       } else {
> +               dev_err(&keypad->client->dev,
> +                               "Another job is currently pending \n");
> +       }
> +
> +       return IRQ_HANDLED;
> +}
> +

> +
> +static int __devinit max7359_probe(struct i2c_client *client,
> +                                       const struct i2c_device_id *id)

You may want to remove __devinit as it is i2c client driver . I have
added linux-i2c for i2c
specific review.

> +static int max7359_suspend(struct i2c_client *client, pm_message_t mesg)
> +{
> +       /* If no keys are pressed, enter sleep mode for 8192 ms */
> +       max7359_write_reg(client, MAX7359_REG_SLEEP, 0x01);
> +
> +       return 0;
> +}
> +
> +static int max7359_resume(struct i2c_client *client)
> +{
> +       /* Restore the default setting (autosleep for 256 ms) */
> +       max7359_write_reg(client, MAX7359_REG_SLEEP, 0x07);
> +
> +       return 0;
> +}

Protect these two function with #ifdef CONFIG_PM please.

> +

> +
> +static struct i2c_driver max7359_i2c_driver = {
> +       .driver = {
> +               .name = "max7359",
> +       },
> +       .probe          = max7359_probe,
> +       .remove         = __exit_p(max7359_remove),


> +};
> +
> +
> +MODULE_AUTHOR("Kim Kyuwon <q1.kim@...sung.com>");
> +MODULE_DESCRIPTION("MAX7359 Key Switch Controller Driver");
> +MODULE_LICENSE("GPL v2");

MODULE_ALIAS ??

> diff --git a/include/linux/max7359_keypad.h b/include/linux/max7359_keypad.h

> +
> +#define KEY(row, col, val)     (((row) << 28) | ((col) << 24) | (val))

Looks like this macro is highly used by many input drivers, anyone
looking at it to place it at common location?


-- 
---Trilok Soni
http://triloksoni.wordpress.com
http://www.linkedin.com/in/triloksoni
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