linux-kernel - Re: [PATCH v3 1/6] i2c / ACPI: Rework I2C device scanning

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Message-ID: <20151020142631.GA5379@katana>
Date:	Tue, 20 Oct 2015 16:26:32 +0200
From:	Wolfram Sang <wsa@...-dreams.de>
To:	Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Cc:	linux-acpi@...r.kernel.org, linux-i2c@...r.kernel.org,
	Lee Jones <lee.jones@...aro.org>,
	"Rafael J . Wysocki" <rjw@...ysocki.net>,
	Mika Westerberg <mika.westerberg@...el.com>,
	"Puustinen, Ismo" <ismo.puustinen@...el.com>,
	"Pandruvada, Srinivas" <srinivas.pandruvada@...el.com>,
	linux-kernel@...r.kernel.org,
	Mika Westerberg <mika.westerberg@...ux.intel.com>
Subject: Re: [PATCH v3 1/6] i2c / ACPI: Rework I2C device scanning

On Wed, Oct 07, 2015 at 01:18:44PM +0300, Andy Shevchenko wrote:
> From: Mika Westerberg <mika.westerberg@...ux.intel.com>
> 
> The way we currently scan I2C devices behind an I2C host controller does not
> work in cases where the I2C device in question is not declared directly below
> the host controller ACPI node.
> 
> This is perfectly legal according the ACPI 6.0 specification and some existing
> systems are doing this.
> 
> To be able to enumerate all devices which are connected to a certain I2C host
> controller we need to rework the current I2C scanning routine a bit. Instead of
> scanning directly below the host controller we scan the whole ACPI namespace
> for present devices with valid I2cSerialBus() connection pointing to the host
> controller in question.
> 
> Signed-off-by: Mika Westerberg <mika.westerberg@...ux.intel.com>
> Acked-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
> Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>

Applied to for-next, thanks!

I am going to pick up patch 5 as well. I hope the others can go via mfd
and there is no build dependency on them?


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