From: Arnd Bergmann <arnd@arndb.de>
To: linux-arm-kernel@lists.infradead.org
Cc: Eric Anholt <eric@anholt.net>,
linux-watchdog@vger.kernel.org, Lee Jones <lee@kernel.org>,
linux-rpi-kernel@lists.infradead.org,
Stephen Warren <swarren@wwwdotorg.org>
Subject: Re: [PATCH 2/2] ARM: BCM2835: Move the restart/power_off handling to the WDT driver.
Date: Sat, 25 Apr 2015 22:11:40 +0200 [thread overview]
Message-ID: <12253069.Jm7LIDAreu@wuerfel> (raw)
In-Reply-To: <1429902534-2348-2-git-send-email-eric@anholt.net>
On Friday 24 April 2015 12:08:54 Eric Anholt wrote:
> +/*
> + * We can't really power off, but if we do the normal reset scheme, and
> + * indicate to bootcode.bin not to reboot, then most of the chip will be
> + * powered off.
> + */
> +static void bcm2835_power_off(void)
> +{
> + struct device_node *np =
> + of_find_compatible_node(NULL, NULL, "brcm,bcm2835-pm-wdt");
> + struct platform_device *pdev = of_find_device_by_node(np);
> + struct bcm2835_wdt *wdt = platform_get_drvdata(pdev);
> + u32 val;
> +
Instead of doing the lookup again here, I'd suggest using a static variable
in the driver to store the device pointer for the device used on power_off.
Make sure that the device remove callback assigns it back to NULL though
and that the function checks for NULL pointer.
Aside from this, the patch looks great.
Arnd
next prev parent reply other threads:[~2015-04-25 20:11 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <1429902534-2348-1-git-send-email-eric@anholt.net>
2015-04-24 19:08 ` [PATCH 2/2] ARM: BCM2835: Move the restart/power_off handling to the WDT driver Eric Anholt
2015-04-24 19:32 ` Pranith Kumar
2015-04-25 4:39 ` Stephen Warren
2015-04-25 20:11 ` Arnd Bergmann [this message]
2015-04-26 15:35 ` Guenter Roeck
2015-04-27 9:18 ` Arnd Bergmann
2015-04-27 12:44 ` Guenter Roeck
2015-04-27 12:48 ` Arnd Bergmann
2015-04-27 13:28 ` Guenter Roeck
2015-04-27 13:32 ` Arnd Bergmann
2015-04-27 12:58 ` Lubomir Rintel
2015-04-27 16:04 ` Guenter Roeck
2015-04-27 16:05 ` Guenter Roeck
2015-04-27 23:12 ` Eric Anholt
2015-04-28 1:39 ` Guenter Roeck
2015-04-28 9:22 ` Lee Jones
2015-04-28 19:38 ` Eric Anholt
2015-04-27 18:28 ` Lee Jones
2015-04-29 2:35 ` [2/2] " Guenter Roeck
2015-04-29 6:45 ` [PATCH 2/2] " Lee Jones
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