Re: [RFC PATCH] mmc: sprd: add MMC host driver for Spreadtrum SoC

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 




On Wed, Jul 1, 2015 at 5:57 PM, Jaehoon Chung <jh80.chung@xxxxxxxxxxx> wrote:
> Hi,
>
> Is sdhost based on SDHCI controller?
> Why don't use sdhci.c? Is there any reason?
>
> Best Regards,
> Jaehoon Chung
>

Because of base64 code problem of his email server, I'm reporting his
reply instead.

>From Billows Wu <billows.wu@xxxxxxxxxxxxxx>
----------------------------------------------------------------------------------------------------------------------------------------
Hi Jaehoon,
Sdhost driver is not based on SDHCI controller.
Our MMC controller is not a standard controller which meets host
controller specification completely.
We add some registers and change some bits in the remaining register,
such as about clock and regulator portion.
If our driver base on SDHCI controller, we must change many codes in
sdhci.c, and our MMC driver will become more complicated.
In order to better use our controller capability and make MMC driver
more compact, we do not use SDHCI controller.

Thanks.
--------------------------------------------------------------------------------------------------------------------------------------------------
--
To unsubscribe from this list: send the line "unsubscribe devicetree" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html



[Index of Archives]     [Device Tree Compilter]     [Device Tree Spec]     [Linux Driver Backports]     [Video for Linux]     [Linux USB Devel]     [Linux PCI Devel]     [Linux Audio Users]     [Linux Kernel]     [Linux SCSI]     [XFree86]     [Yosemite Backpacking]
  Powered by Linux