From mboxrd@z Thu Jan  1 00:00:00 1970
From: Lee Jones <lee.jones@linaro.org>
Subject: Re: [RFC PATCH v2 05/16] mfd: Add ACPI support
Date: Tue, 16 Sep 2014 14:54:40 -0700
Message-ID: <20140916215440.GP25162@lee--X1>
References: <1410868367-11056-1-git-send-email-mika.westerberg@linux.intel.com>
 <1410868367-11056-6-git-send-email-mika.westerberg@linux.intel.com>
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To: Mika Westerberg <mika.westerberg@linux.intel.com>
Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net>, linux-acpi@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Greg Kroah-Hartman <gregkh@linuxfoundation.org>, Linus Walleij <linus.walleij@linaro.org>, Alexandre Courbot <gnurou@gmail.com>, Dmitry Torokhov <dmitry.torokhov@gmail.com>, Bryan Wu <cooloney@gmail.com>, Grant Likely <grant.likely@linaro.org>, Arnd Bergmann <arnd@arndb.de>, Aaron Lu <aaron.lu@intel.com>, Darren Hart <dvhart@linux.intel.com>
List-Id: devicetree@vger.kernel.org

On Tue, 16 Sep 2014, Mika Westerberg wrote:

> If an MFD device is backed by ACPI namespace, we should allow subdevi=
ce
> drivers to access their corresponding ACPI companion devices through =
normal
> means (e.g using ACPI_COMPANION()).
>=20
> This patch adds such support to the MFD core. If the MFD parent devic=
e
> does not specify any ACPI _HID/_CID for the child device, the child
> device will share the parent ACPI companion device. Otherwise the chi=
ld
> device will be assigned with the corresponding ACPI companion, if fou=
nd
> in the namespace below the parent.
>=20
> Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
> Reviewed-by: Darren Hart <dvhart@linux.intel.com>
> ---
> Lee, I tried to get rid of #ifdefs in the below patch but it wasn't
> possible because we are using functions that are not available when
> !CONFIG_ACPI.
>=20
>  Documentation/acpi/enumeration.txt | 27 +++++++++++++++++++++++++
>  drivers/mfd/mfd-core.c             | 40 ++++++++++++++++++++++++++++=
++++++++++
>  include/linux/mfd/core.h           |  3 +++
>  3 files changed, 70 insertions(+)

Acked-by: Lee Jones <lee.jones@linaro.org>

--=20
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org =E2=94=82 Open source software for ARM SoCs
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