From: Grant Likely <grant.likely-s3s/WqlpOiPyB63q8FvJNQ@public.gmane.org>
To: linux-i2c-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Cc: Jean Delvare <khali-PUYAD+kWke1g9hUCZPvPmw@public.gmane.org>,
devicetree-discuss-uLR06cmDAlY/bJ5BZ2RsiQ@public.gmane.org,
Ben Dooks <ben-linux-elnMNo+KYs3YtjvyW6yDsg@public.gmane.org>,
Wolfram Sang <w.sang-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org>,
Guenter Roeck <linux-0h96xk9xTtrk1uMJSBkQmQ@public.gmane.org>
Subject: Re: [PATCH RESEND] i2c: Add support for device-tree based chip initialization
Date: Mon, 26 Nov 2012 20:13:46 +0000 [thread overview]
Message-ID: <20121126201346.4E8963E095F@localhost> (raw)
In-Reply-To: <1353905636-6697-1-git-send-email-linux-0h96xk9xTtrk1uMJSBkQmQ@public.gmane.org>
On Sun, 25 Nov 2012 20:53:56 -0800, Guenter Roeck <linux-0h96xk9xTtrk1uMJSBkQmQ@public.gmane.org> wrote:
> Some I2C devices are not or not correctly initialized by the firmware.
> Configuration would be possible via platform data, but that would require
> per-driver platform data and a lot of code, and changing it would not be
> possible without re-compiling the kernel. It is more elegant to do it
> generically via devicetree properties.
>
> Add a generic I2C devicetree property named "reg-init". This property provides
> a sequence of device initialization commands to be executed prior to calling
> the probe function for a given device.
>
> Signed-off-by: Guenter Roeck <linux-0h96xk9xTtrk1uMJSBkQmQ@public.gmane.org>
This is a very similar problem to the power sequences series that was
recently posted to this list. I would like that feature and this
mechanism use the same approach.
g.
next prev parent reply other threads:[~2012-11-26 20:13 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-11-26 4:53 [PATCH RESEND] i2c: Add support for device-tree based chip initialization Guenter Roeck
[not found] ` <1353905636-6697-1-git-send-email-linux-0h96xk9xTtrk1uMJSBkQmQ@public.gmane.org>
2012-11-26 16:43 ` Rob Herring
[not found] ` <50B39C3A.5080600-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2012-11-26 20:19 ` Guenter Roeck
[not found] ` <20121126201954.GA14617-0h96xk9xTtrk1uMJSBkQmQ@public.gmane.org>
2012-11-26 22:37 ` Rob Herring
[not found] ` <50B3EF21.9020201-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2012-11-26 22:58 ` Mitch Bradley
[not found] ` <50B3F41E.3020805-D5eQfiDGL7eakBO8gow8eQ@public.gmane.org>
2012-11-27 3:40 ` Guenter Roeck
2012-11-26 20:13 ` Grant Likely [this message]
2012-11-27 0:26 ` David Daney
[not found] ` <50B408BF.8050508-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2012-11-27 0:41 ` Guenter Roeck
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