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From: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
To: Sascha Hauer <s.hauer@pengutronix.de>
Cc: barebox@lists.infradead.org
Subject: Re: [PATCH] devicetree probe support
Date: Thu, 20 Sep 2012 20:45:15 +0200	[thread overview]
Message-ID: <20120920184515.GJ26553@game.jcrosoft.org> (raw)
In-Reply-To: <1347480407-16865-1-git-send-email-s.hauer@pengutronix.de>

On 22:06 Wed 12 Sep     , Sascha Hauer wrote:
> Hi All,
> 
> The following patch series adds support for probing barebox from
> devicetree.
> 
> Most of the of helper code is taken directly from the Linux Kernel,
> only little glue code is needed to populate the barebox devicetree
> from a dtb.
> 
> Currently the dtb can be probed with 'oftree -p <dtb>'. After calling
> this command the devices found in the dtb are probed. Devices which
> were present before are not probed again, instead the corresponding
> device nodes are attached to the barebox devices.
> 
> Further directions could be that barebox takes the dtb directly from
> a first stage loader, so a second stage barebox could be started just
> like a Linux Kernel. I have some experimental code for that. Another
> possibility would be to compile a dtb into barebox, but this is not
> done yet.
> 
> This series contains support for the basic probing, GPIO, SPI and
> several i.MX devices. The devicetree probe support nearly compiles
> away if disabled and takes about 6k in an uncompressed image when
> enabled.
> 
> Here is an example session:
> 
> barebox@Phytec phyCORE-i.MX27:/ oftree -p mnt/tftp/sha-oftree-pcm038
> barebox@Phytec phyCORE-i.MX27:/ devinfo 1000c000.serial
> resources:
> num   : 0
> start : 0x1000c000
> size  : 0x00001000
> driver: imx_serial
> 
> no info available for 1000c000.serial
> no parameters available
> 
> device node: /soc/aipi@10000000/serial@1000c000
> serial@1000c000 {
>         compatible: "fsl,imx27-uart", "fsl,imx21-uart"
>         reg: <0x1000c000 0x1000>
>         interrupts: <0x12>
>         status: "okay"
>         fsl,uart-has-rtscts:
> };
this break the fb support as those framework register device
whith resource but that may not init as the start of the ressource is
screen_base which could be 0 as no mode is selected

we really need to finish to clean the bus before applying this one

Best Regards,
J.

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  parent reply	other threads:[~2012-09-20 18:47 UTC|newest]

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-09-12 20:06 Sascha Hauer
2012-09-12 20:06 ` [PATCH 01/15] driver: add dev_get_drvdata function Sascha Hauer
2012-09-12 20:06 ` [PATCH 02/15] of: add devicetree probing support Sascha Hauer
2012-09-18 15:48   ` Jean-Christophe PLAGNIOL-VILLARD
2012-09-12 20:06 ` [PATCH 03/15] oftree command: Add devicetree probe support Sascha Hauer
2012-09-12 20:06 ` [PATCH 04/15] of: Add devicetree partition parsing Sascha Hauer
2012-09-12 20:06 ` [PATCH 05/15] spi: add oftree support Sascha Hauer
2012-09-12 20:06 ` [PATCH 06/15] ARM i.MX: Use platform_device_id for gpio driver Sascha Hauer
2012-09-12 20:06 ` [PATCH 07/15] ARM i.MX: implement clocksource as driver Sascha Hauer
2012-09-17 16:17   ` Sascha Hauer
2012-09-12 20:06 ` [PATCH 08/15] serial i.MX: oftree support Sascha Hauer
2012-09-12 20:06 ` [PATCH 09/15] net fec_imx: " Sascha Hauer
2012-09-12 20:06 ` [PATCH 10/15] spi imx: dt support Sascha Hauer
2012-09-12 20:06 ` [PATCH 11/15] mfd mc13xxx: Add devicetree support Sascha Hauer
2012-09-12 20:06 ` [PATCH 12/15] cfi-flash: Add devicetree probe support Sascha Hauer
2012-09-12 20:06 ` [PATCH 13/15] mci i.MX esdhc: Add oftree support Sascha Hauer
2012-09-12 20:06 ` [PATCH 14/15] ARM i.MX: add devicetree support for gpio driver Sascha Hauer
2012-09-12 20:06 ` [PATCH 15/15] ARM i.MX: Add devicetree support for clocksource driver Sascha Hauer
2012-09-20 18:45 ` Jean-Christophe PLAGNIOL-VILLARD [this message]
2012-09-20 18:51   ` [PATCH 1/1] fb: add it's own bus for fb devices Jean-Christophe PLAGNIOL-VILLARD
2012-09-20 21:17     ` Sascha Hauer

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