Re: [PATCH 3/3] mmc: enabling ColdFire esdhc controller support

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Hi Greg,
On Mon, May 13, 2019 at 02:19:57PM +1000, Greg Ungerer wrote:
> Hi Angelo,
> 
> On 13/5/19 5:41 am, Angelo Dureghello wrote:
> > Signed-off-by: Angelo Dureghello <angelo@xxxxxxxx>
> > ---
> >   drivers/mmc/host/Kconfig  | 13 +++++++++++++
> >   drivers/mmc/host/Makefile |  3 +++
> >   2 files changed, 16 insertions(+)
> > 
> > diff --git a/drivers/mmc/host/Kconfig b/drivers/mmc/host/Kconfig
> > index 0e86340536b6..91007572a097 100644
> > --- a/drivers/mmc/host/Kconfig
> > +++ b/drivers/mmc/host/Kconfig
> > @@ -220,6 +220,19 @@ config MMC_SDHCI_CNS3XXX
> >   	  If unsure, say N.
> > +config MMC_SDHCI_ESDHC_MCF
> > +	tristate "SDHCI support for the Freescale eSDHC ColdFire controller"
> > +	depends on M5441x
> > +	depends on MMC_SDHCI_PLTFM
> > +	select MMC_SDHCI_IO_ACCESSORS
> > +	help
> > +	  This selects the Freescale eSDHC/uSDHC controller support
> > +	  found on i.MX25, i.MX35 i.MX5x and i.MX6x.
> 
> So you copied/pasted this from the entry for the MMC_SDHCI_ESDHC_IMX driver?
> 
> I have not looked at the hardware module of the SHDC controller in
> the ColdFire parts, but is it in any way similar or the same as
> Freescale uses in the iMX families?
> 

Oh, i forgot those iMX references, need to fix it, thanks for 
catching it.

Initially i tried to use the existing imx driver, but mainly
the ColdFire controller needs all ops/accessors functions to be
big endian, and there are other minimal differecies in the
controllers. Finally the simpliest way was to create a separate
module. The base is still sdhci.c.

> Regards
> Greg
> 

Regards,
Angelo
> 
> 
> > +	  If you have a controller with this interface, say Y or M here.
> > +
> > +	  If unsure, say N.
> > +
> >   config MMC_SDHCI_ESDHC_IMX
> >   	tristate "SDHCI support for the Freescale eSDHC/uSDHC i.MX controller"
> >   	depends on ARCH_MXC
> > diff --git a/drivers/mmc/host/Makefile b/drivers/mmc/host/Makefile
> > index 73578718f119..17c3826dfe81 100644
> > --- a/drivers/mmc/host/Makefile
> > +++ b/drivers/mmc/host/Makefile
> > @@ -80,6 +80,7 @@ obj-$(CONFIG_MMC_REALTEK_USB)	+= rtsx_usb_sdmmc.o
> >   obj-$(CONFIG_MMC_SDHCI_PLTFM)		+= sdhci-pltfm.o
> >   obj-$(CONFIG_MMC_SDHCI_CADENCE)		+= sdhci-cadence.o
> >   obj-$(CONFIG_MMC_SDHCI_CNS3XXX)		+= sdhci-cns3xxx.o
> > +obj-$(CONFIG_MMC_SDHCI_ESDHC_MCF)       += sdhci-esdhc-mcf.o
> >   obj-$(CONFIG_MMC_SDHCI_ESDHC_IMX)	+= sdhci-esdhc-imx.o
> >   obj-$(CONFIG_MMC_SDHCI_DOVE)		+= sdhci-dove.o
> >   obj-$(CONFIG_MMC_SDHCI_TEGRA)		+= sdhci-tegra.o
> > @@ -104,3 +105,5 @@ endif
> >   obj-$(CONFIG_MMC_SDHCI_XENON)	+= sdhci-xenon-driver.o
> >   sdhci-xenon-driver-y		+= sdhci-xenon.o sdhci-xenon-phy.o
> > +
> > +CFLAGS_sdhci-esdhc-mcf.o := -DDEBUG
> > 



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