From: swarren@wwwdotorg•org (Stephen Warren)
To: linux-arm-kernel@lists•infradead.org
Subject: [PATCH 1/3] gpio: Add simple poweroff-gpio driver
Date: Sun, 11 Nov 2012 15:03:49 -0700 [thread overview]
Message-ID: <50A020C5.4070506@wwwdotorg.org> (raw)
In-Reply-To: <1352650891-18356-2-git-send-email-andrew@lunn.ch>
On 11/11/2012 09:21 AM, Andrew Lunn wrote:
> From: Jamie Lentin <jm@lentin•co.uk>
>
> Given appropriate devicetree bindings, this driver registers a
> pm_power_off function to set a GPIO line high/low to power down
> your board.
This feature will be useful for the Tegra TrimSlice board too.
> diff --git a/Documentation/devicetree/bindings/gpio/gpio-poweroff.txt b/Documentation/devicetree/bindings/gpio/gpio-poweroff.txt
> +Required properties:
> +- compatible : should be "gpio-poweroff".
> +- gpios : The GPIO to set high/low, see "gpios property" in
> + Documentation/devicetree/bindings/gpio/gpio.txt. If the pin should be
> + low to power down the board set it to "Active Low", otherwise set
> + gpio to "Active High".
Unfortunately, not all GPIO bindings support active high/low flags in
the GPIO specifier. As such, the flags there are basically useless.
Other bindings (e.g. IIRC the fixed-regulator binding) have added a
separate active-high property to indicate the GPIO polarity. This
binding should probably follow suite.
next prev parent reply other threads:[~2012-11-11 22:03 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-11-11 16:21 [PATCH 0/3] GPIO driver to turn power off Andrew Lunn
2012-11-11 16:21 ` [PATCH 1/3] gpio: Add simple poweroff-gpio driver Andrew Lunn
2012-11-11 22:03 ` Stephen Warren [this message]
2012-11-12 8:25 ` Andrew Lunn
2012-11-12 16:17 ` Stephen Warren
2012-11-12 18:19 ` Andrew Lunn
2012-11-12 18:43 ` Anton Vorontsov
2012-11-12 18:58 ` Stephen Warren
2012-11-12 19:17 ` Anton Vorontsov
2012-11-15 10:35 ` Linus Walleij
2012-11-15 10:59 ` Anton Vorontsov
2012-11-15 11:10 ` Linus Walleij
2012-11-21 13:17 ` Grant Likely
2012-11-15 18:00 ` Stephen Warren
2012-11-12 1:00 ` Linus Walleij
2012-11-12 1:12 ` Anton Vorontsov
2012-11-12 6:07 ` Andrew Lunn
2012-11-12 6:53 ` Anton Vorontsov
2012-11-15 18:05 ` Grant Likely
2012-11-15 18:11 ` Jamie Lentin
2012-11-15 18:21 ` Grant Likely
2012-11-21 13:20 ` Grant Likely
2012-11-11 16:21 ` [PATCH 2/3] ARM: Kirkwood: Convert DNSKW to use gpio-poweroff Andrew Lunn
2012-11-11 16:21 ` [PATCH 3/3] ARM: Kirkwood: Convert IB62x0 " Andrew Lunn
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