From: Sascha Hauer <s.hauer@pengutronix.de>
To: Ivor Kruger <ivor@veriline.co.za>
Cc: barebox@lists.infradead.org
Subject: Re: Writing to I2C device during Barebox boot
Date: Mon, 14 Oct 2013 10:27:01 +0200 [thread overview]
Message-ID: <20131014082701.GX30088@pengutronix.de> (raw)
In-Reply-To: <CE7BF428.8D50%ivor@veriline.co.za>
Hi Ivor,
On Thu, Oct 10, 2013 at 06:10:42AM -0700, Ivor Kruger wrote:
> Jan, thanks for the reply, I will look into using git-send-email a bit
> later since I am going to travel this morning fro a few hours.
>
> My question was however a little bit more generic. Take for example the
> PCM049 board.c file. One of the I2C components it loads is the TWL6030. If
> I wish to write to a register on this device, how would I go about it.
When the driver is probed you should see a /dev/twl6030. You can read
the registers doing:
md -s /dev/twl6030
And you can write registers like this:
mw -d /dev/twl6030 <offset> <value>
If you wish to read/write registers from code grep the code for
twl6030_get.
Sascha
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prev parent reply other threads:[~2013-10-14 8:27 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <CE7B48EC.8D30%ivor@veriline.co.za>
2013-10-10 1:59 ` FW: " Ivor Kruger
2013-10-10 7:42 ` Jan Lübbe
2013-10-10 13:10 ` Ivor Kruger
2013-10-14 8:27 ` Sascha Hauer [this message]
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