From: Rob Herring <robh-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
To: Jyri Sarha <jsarha-l0cyMroinI0@public.gmane.org>
Cc: linux-fbdev-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
plagnioj-sclMFOaUSTBWk0Htik3J/w@public.gmane.org,
tomi.valkeinen-l0cyMroinI0@public.gmane.org,
maxime.ripard-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org,
bcousson-rdvid1DuHRBWk0Htik3J/w@public.gmane.org
Subject: Re: [PATCH 2/3] fbdev: ssd1307fb: Remove reset-active-low from the DT binding document
Date: Wed, 8 Jun 2016 15:09:56 -0500 [thread overview]
Message-ID: <20160608200956.GA15788@rob-hp-laptop> (raw)
In-Reply-To: <fc99babab77bbf9fcbe34fc82d7e2a18f9a1e464.1465303439.git.jsarha-l0cyMroinI0@public.gmane.org>
On Tue, Jun 07, 2016 at 04:51:13PM +0300, Jyri Sarha wrote:
> Remove reset-active-low from the devicetree binding document. The actual
> implementation has never been there in the driver code and there is no
> reason to add it because the gpiod API supports gpio flags, including
> GPIO_ACTIVE_LOW, directly trough its own devicetree binding.
>
> Signed-off-by: Jyri Sarha <jsarha-l0cyMroinI0@public.gmane.org>
> ---
> Documentation/devicetree/bindings/display/ssd1307fb.txt | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/Documentation/devicetree/bindings/display/ssd1307fb.txt b/Documentation/devicetree/bindings/display/ssd1307fb.txt
> index eb31ed4..4aee67f 100644
> --- a/Documentation/devicetree/bindings/display/ssd1307fb.txt
> +++ b/Documentation/devicetree/bindings/display/ssd1307fb.txt
> @@ -8,14 +8,14 @@ Required properties:
> 0x3c or 0x3d
> - pwm: Should contain the pwm to use according to the OF device tree PWM
> specification [0]. Only required for the ssd1307.
> - - reset-gpios: Should contain the GPIO used to reset the OLED display
> + - reset-gpios: Should contain the GPIO used to reset the OLED display. See
> + Documentation/devicetree/bindings/gpio/gpio.txt for details.
You should state here it is active low.
> - solomon,height: Height in pixel of the screen driven by the controller
> - solomon,width: Width in pixel of the screen driven by the controller
> - solomon,page-offset: Offset of pages (band of 8 pixels) that the screen is
> mapped to.
>
> Optional properties:
> - - reset-active-low: Is the reset gpio is active on physical low?
> - solomon,segment-no-remap: Display needs normal (non-inverted) data column
> to segment mapping
> - solomon,com-seq: Display uses sequential COM pin configuration
> --
> 1.9.1
>
> --
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next prev parent reply other threads:[~2016-06-08 20:09 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-06-07 13:51 [PATCH 0/3] fbdev: ssd1307fb: Make reset-gpios optional property Jyri Sarha
[not found] ` <cover.1465303439.git.jsarha-l0cyMroinI0@public.gmane.org>
2016-06-07 13:51 ` [PATCH 1/3] fbdev: ssd1307fb: Start to use gpiod API for reset gpio Jyri Sarha
2016-06-07 13:51 ` [PATCH 2/3] fbdev: ssd1307fb: Remove reset-active-low from the DT binding document Jyri Sarha
[not found] ` <fc99babab77bbf9fcbe34fc82d7e2a18f9a1e464.1465303439.git.jsarha-l0cyMroinI0@public.gmane.org>
2016-06-08 20:09 ` Rob Herring [this message]
2016-06-07 13:51 ` [PATCH 3/3] fbdev: ssd1307fb: Make reset gpio devicetree property optional Jyri Sarha
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