Re: [PATCH v3 1/2] regulator: s5m8767: Use GPIO for controllingBuck9/eMMC

[Lee Jones]

On Fri, 24 Jan 2014, Krzysztof Kozlowski wrote:

> Add support for GPIO control (enable/disable) over Buck9. The Buck9
> Converter is used as a supply for eMMC Host Controller.
> 
> BUCK9EN GPIO of S5M8767 chip may be used by application processor to
> enable or disable the Buck9. This has two benefits:
>  - It is faster than toggling it over I2C bus.
>  - It allows disabling the regulator during suspend to RAM; The AP will
>    enable it during resume; Without the patch the regulator supplying
>    eMMC must be defined as fixed-regulator.
> 
> Signed-off-by: Krzysztof Kozlowski <k.kozlowski@xxxxxxxxxxx>
> Cc: Kyungmin Park <kyungmin.park@xxxxxxxxxxx>
> Cc: Marek Szyprowski <m.szyprowski@xxxxxxxxxxx>
> Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@xxxxxxxxxxx>
> ---
>  drivers/regulator/s5m8767.c         |   87 +++++++++++++++++++++++++++++++++--
>  include/linux/mfd/samsung/core.h    |    3 +-
>  include/linux/mfd/samsung/s5m8767.h |    7 +++
>  3 files changed, 93 insertions(+), 4 deletions(-)

For the MFD changes:
  Acked-by: Lee Jones <lee.jones@xxxxxxxxxx>

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org â Open source software for ARM SoCs
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