Re: [RFC PATCH v2 05/16] mfd: Add ACPI support

Lee Jones
2014-09-16T21:54:40Z

On Tue, 16 Sep 2014, Mika Westerberg wrote:

> If an MFD device is backed by ACPI namespace, we should allow subdevice
> drivers to access their corresponding ACPI companion devices through normal
> means (e.g using ACPI_COMPANION()).
>
> This patch adds such support to the MFD core. If the MFD parent device
> does not specify any ACPI _HID/_CID for the child device, the child
> device will share the parent ACPI companion device. Otherwise the child
> device will be assigned with the corresponding ACPI companion, if found
> in the namespace below the parent.
>
> 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.
>
> 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>

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Lee Jones
Linaro STMicroelectronics Landing Team Lead
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