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Re: [PATCH][2/6] led: add Cobalt Raq series LEDs support

To: Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp>
Subject: Re: [PATCH][2/6] led: add Cobalt Raq series LEDs support
From: Ralf Baechle <ralf@linux-mips.org>
Date: Thu, 20 Sep 2007 17:00:34 +0100
Cc: Richard Purdie <rpurdie@rpsys.net>, linux-mips <linux-mips@linux-mips.org>
In-reply-to: <20070920230322.6600dd83.yoichi_yuasa@tripeaks.co.jp>
Original-recipient: rfc822;linux-mips@linux-mips.org
References: <20070920230204.0ad15513.yoichi_yuasa@tripeaks.co.jp> <20070920230322.6600dd83.yoichi_yuasa@tripeaks.co.jp>
Sender: linux-mips-bounce@linux-mips.org
User-agent: Mutt/1.5.14 (2007-02-12)
On Thu, Sep 20, 2007 at 11:03:22PM +0900, Yoichi Yuasa wrote:

> diff -pruN -X mips/Documentation/dontdiff 
> mips-orig/drivers/leds/leds-cobalt-raq.c mips/drivers/leds/leds-cobalt-raq.c
> --- mips-orig/drivers/leds/leds-cobalt-raq.c  1970-01-01 09:00:00.000000000 
> +0900
> +++ mips/drivers/leds/leds-cobalt-raq.c       2007-09-14 13:06:03.900173500 
> +0900
> @@ -0,0 +1,135 @@
> +/*
> + *  LEDs driver for the Cobalt Raq series.
> + *
> + *  Copyright (C) 2007  Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp>
> + *
> + *  This program is free software; you can redistribute it and/or modify
> + *  it under the terms of the GNU General Public License as published by
> + *  the Free Software Foundation; either version 2 of the License, or
> + *  (at your option) any later version.

Do you really want to allow version 2 or newer?  (Just checking)

> + *
> + *  This program is distributed in the hope that it will be useful,
> + *  but WITHOUT ANY WARRANTY; without even the implied warranty of
> + *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
> + *  GNU General Public License for more details.
> + *
> + *  You should have received a copy of the GNU General Public License
> + *  along with this program; if not, write to the Free Software
> + *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  
> 02110-1301  USA
> + */
> +#include <linux/init.h>
> +#include <linux/ioport.h>
> +#include <linux/leds.h>
> +#include <linux/platform_device.h>
> +#include <linux/spinlock.h>
> +#include <linux/types.h>
> +
> +#include <asm/io.h>

This should be <linux/io.h>

> +
> +#define LED_WEB              0x04
> +#define LED_POWER_OFF        0x08
> +
> +static void __iomem *led_port;
> +static u8 led_value;
> +static DEFINE_SPINLOCK(led_value_lock);
> +
> +static void raq_web_led_set(struct led_classdev *led_cdev,
> +                            enum led_brightness brightness)
> +{
> +     spin_lock_irq(&led_value_lock);
> +
> +     if (brightness)
> +             led_value |= LED_WEB;
> +     else
> +             led_value &= ~LED_WEB;
> +     writeb(led_value, led_port);
> +
> +     spin_unlock_irq(&led_value_lock);
> +}
> +
> +static struct led_classdev raq_web_led = {
> +     .name           = "raq-web",
> +     .brightness_set = raq_web_led_set,
> +};
> +
> +static void raq_power_off_led_set(struct led_classdev *led_cdev,
> +                                  enum led_brightness brightness)
> +{
> +     spin_lock_irq(&led_value_lock);
> +
> +     if (brightness)
> +             led_value |= LED_POWER_OFF;
> +     else
> +             led_value &= ~LED_POWER_OFF;
> +     writeb(led_value, led_port);
> +
> +     spin_unlock_irq(&led_value_lock);
> +}
> +
> +static struct led_classdev raq_power_off_led = {
> +     .name                   = "raq-power-off",
> +     .brightness_set         = raq_power_off_led_set,
> +     .default_trigger        = "power-off",
> +};
> +
> +static int __devinit cobalt_raq_led_probe(struct platform_device *pdev)
> +{
> +     struct resource *res;
> +     int retval;
> +
> +     res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> +     if (!res)
> +             return -EBUSY;
> +
> +     led_port = ioremap(res->start, res->end - res->start + 1);
> +     if (!led_port)
> +             return -ENOMEM;
> +
> +     retval = led_classdev_register(&pdev->dev, &raq_power_off_led);
> +     if (retval)
> +             goto err_iounmap;
> +
> +     retval = led_classdev_register(&pdev->dev, &raq_web_led);
> +     if (retval)
> +             goto err_unregister;
> +
> +     return 0;
> +
> +err_unregister:
> +     led_classdev_unregister(&raq_power_off_led);
> +
> +err_iounmap:
> +     iounmap(led_port);
> +     led_port = NULL;
> +
> +     return retval;
> +}
> +
> +static int __devexit cobalt_raq_led_remove(struct platform_device *pdev)
> +{
> +     led_classdev_unregister(&raq_power_off_led);
> +     led_classdev_unregister(&raq_web_led);
> +
> +     if (led_port) {
> +             iounmap(led_port);
> +             led_port = NULL;
> +     }
> +
> +     return 0;
> +}
> +
> +static struct platform_driver cobalt_raq_led_driver = {
> +     .probe  = cobalt_raq_led_probe,
> +     .remove = __devexit_p(cobalt_raq_led_remove),
> +     .driver = {
> +             .name   = "Cobalt Raq LEDs",
> +             .owner  = THIS_MODULE,
> +     },
> +};
> +
> +static int __init cobalt_raq_led_init(void)
> +{
> +     return platform_driver_register(&cobalt_raq_led_driver);
> +}
> +
> +module_init(cobalt_raq_led_init);

  Ralf

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