From: Sascha Hauer <s.hauer@pengutronix.de>
To: Tomaz Solc <tomaz.solc@tablix.org>
Cc: barebox@lists.infradead.org
Subject: Re: [PATCH 3/3] commands: add of_bootargs command.
Date: Fri, 22 Feb 2019 08:49:22 +0100 [thread overview]
Message-ID: <20190222074922.smfgbcwqmd6uddgi@pengutronix.de> (raw)
In-Reply-To: <20190221092848.4488-4-tomaz.solc@tablix.org>
On Thu, Feb 21, 2019 at 10:28:48AM +0100, Tomaz Solc wrote:
> When booting a Raspberry Pi, it is useful to extract bootargs from the
> device tree that was created by the VideoCore firmware. These bootargs
> contain for example settings for the framebuffer that the kernel needs
> to properly set the video output.
>
> This commit adds an of_bootargs command that extracts a bootargs
> property from a device tree and saves it to a global variable.
>
> For example, a bootloader environment can use this command to extract
> the bootargs to linux.bootargs.vc, which then gets included into the
> final bootargs for the kernel using CONFIG_FLEXIBLE_BOOTARGS.
Do we need an extra command for this? Can't you just unflatten the
VideoCore provided device tree in the board code you have added in 2/3
and set global.linux.bootargs.vc from there? It seems to be just the
right thing without further user intervention.
Sascha
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next prev parent reply other threads:[~2019-02-22 7:49 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-02-21 9:28 [PATCH 0/3] VideoCore FDT interop for Raspberry Pi Tomaz Solc
2019-02-21 9:28 ` [PATCH 1/3] ARM: start: save end of memory passed to start Tomaz Solc
2019-02-21 9:28 ` [PATCH 2/3] ARM: rpi: save fdt that was passed from VideoCore Tomaz Solc
2019-02-26 15:18 ` Roland Hieber
2019-02-21 9:28 ` [PATCH 3/3] commands: add of_bootargs command Tomaz Solc
2019-02-22 7:49 ` Sascha Hauer [this message]
2019-02-22 10:38 ` Tomaž Šolc
2019-02-22 11:08 ` Sascha Hauer
2019-02-26 15:21 ` Roland Hieber
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