From: Mark Brown <broonie-yzvPICuk2AATkU/dhu1WVueM+bqZidxxQQ4Iyu8u01E@public.gmane.org>
To: Guenter Roeck <linux-0h96xk9xTtrk1uMJSBkQmQ@public.gmane.org>
Cc: spi-devel-general-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org,
linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Subject: Re: [PATCH resend] spi core: Provide means to instantiate devices through sysfs
Date: Sat, 22 Sep 2012 12:11:33 -0400 [thread overview]
Message-ID: <20120922161133.GU4495@opensource.wolfsonmicro.com> (raw)
In-Reply-To: <1347925880-13076-1-git-send-email-linux-0h96xk9xTtrk1uMJSBkQmQ@public.gmane.org>
On Mon, Sep 17, 2012 at 04:51:20PM -0700, Guenter Roeck wrote:
> The I2C core provides a means to instantiate devices from userspace
> using sysfs attributes. Provide the same mechanism for SPI devices.
So, unlike I2C this is only going to work for a subset of controllers -
anything that relies on GPIOs for chip select will need more data to add
the chip selects for example. This means I'm having a hard time getting
enthused about the idea, it seems like it might be a support burden.
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WARNING: multiple messages have this Message-ID (diff)
From: Mark Brown <broonie@opensource.wolfsonmicro.com>
To: Guenter Roeck <linux@roeck-us.net>
Cc: spi-devel-general@lists.sourceforge.net,
linux-kernel@vger.kernel.org,
Grant Likely <grant.likely@secretlab.ca>
Subject: Re: [PATCH resend] spi core: Provide means to instantiate devices through sysfs
Date: Sat, 22 Sep 2012 12:11:33 -0400 [thread overview]
Message-ID: <20120922161133.GU4495@opensource.wolfsonmicro.com> (raw)
In-Reply-To: <1347925880-13076-1-git-send-email-linux@roeck-us.net>
On Mon, Sep 17, 2012 at 04:51:20PM -0700, Guenter Roeck wrote:
> The I2C core provides a means to instantiate devices from userspace
> using sysfs attributes. Provide the same mechanism for SPI devices.
So, unlike I2C this is only going to work for a subset of controllers -
anything that relies on GPIOs for chip select will need more data to add
the chip selects for example. This means I'm having a hard time getting
enthused about the idea, it seems like it might be a support burden.
next prev parent reply other threads:[~2012-09-22 16:11 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-09-17 23:51 [PATCH resend] spi core: Provide means to instantiate devices through sysfs Guenter Roeck
2012-09-17 23:51 ` Guenter Roeck
[not found] ` <1347925880-13076-1-git-send-email-linux-0h96xk9xTtrk1uMJSBkQmQ@public.gmane.org>
2012-09-22 16:11 ` Mark Brown [this message]
2012-09-22 16:11 ` Mark Brown
2012-09-22 18:56 ` Guenter Roeck
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