[U-Boot] [PATCH 2/4] mtd: vf610_nfc: add Freescale NFC controller configs to Kconfig

[Scott Wood <scottwood@freescale.com>]

On Fri, 2015-04-03 at 22:42 +0200, Stefan Agner wrote:
> On 2015-04-03 22:30, Scott Wood wrote:
> > On Fri, 2015-04-03 at 20:40 +0200, Stefan Agner wrote:
> >> This commit allows users to enable/disable the Freescale NFC
> >> controller found in systems like Vybrid (VF610), MPC5125, MCF54418
> >> or Kinetis K70 via Kconfig with more detailed help docs.
> >>
> >> Signed-off-by: Stefan Agner <stefan@agner.ch>
> >> ---
> >>  configs/vf610twr_defconfig |  2 ++
> >>  drivers/mtd/nand/Kconfig   | 15 +++++++++++++++
> >>  include/configs/vf610twr.h |  3 ---
> >>  3 files changed, 17 insertions(+), 3 deletions(-)
> >>
> >> diff --git a/configs/vf610twr_defconfig b/configs/vf610twr_defconfig
> >> index 7de374a..5e0ac9f 100644
> >> --- a/configs/vf610twr_defconfig
> >> +++ b/configs/vf610twr_defconfig
> >> @@ -1,3 +1,5 @@
> >>  CONFIG_SYS_EXTRA_OPTIONS="IMX_CONFIG=board/freescale/vf610twr/imximage.cfg,ENV_IS_IN_MMC"
> >>  CONFIG_ARM=y
> >>  CONFIG_TARGET_VF610TWR=y
> >> +CONFIG_NAND_VF610_NFC=y
> >> +CONFIG_SYS_NAND_BUSWIDTH_16BIT=y
> >> diff --git a/drivers/mtd/nand/Kconfig b/drivers/mtd/nand/Kconfig
> >> index 72825c3..8056c06 100644
> >> --- a/drivers/mtd/nand/Kconfig
> >> +++ b/drivers/mtd/nand/Kconfig
> >> @@ -32,6 +32,21 @@ config NAND_DENALI_SPARE_AREA_SKIP_BYTES
> >>  	  of OOB area before last ECC sector data starts.  This is potentially
> >>  	  used to preserve the bad block marker in the OOB area.
> >>
> >> +config NAND_VF610_NFC
> >> +	bool "Support for Freescale NFC for VF610/MPC5125"
> >> +	select SYS_NAND_SELF_INIT
> >> +	help
> >> +	  Enables support for NAND Flash Controller on some Freescale
> >> +	  processors like the VF610, MPC5125, MCF54418 or Kinetis K70.
> >> +	  The driver supports a maximum 2k page size. The driver
> >> +	  currently does not support hardware ECC.
> >> +
> >> +config SYS_NAND_BUSWIDTH_16BIT
> >> +	bool "Use 16-bit NAND interface"
> >> +	depends on NAND_VF610_NFC
> >> +	help
> >> +	  Use 16-bit wide NAND flash interface.
> > 
> > Why does a generic-sounding config name depend on VF610?  Especially
> > when README already lists three other drivers as using this option...
> 
> That option is _not_ meant as being VF610 specific.
> 
> Since we have the ability to specify dependencies with Kconfig, I think
> it is nice to have options only available if a driver supports it, hence
> the depends. So far the VF610 NAND driver is the only one which is in
> Kconfig and supports it... I would expect that when another driver which
> supports that option gets migrated, depends will be extended
> accordingly.
> 
> However, I just realized that the option end up between Vybrid specific
> configs because of Patch 3. I will move the option at the very bottom in
> next revision.

Could you also add a comment mentioning the other drivers that use it,
which aren't yet kconfiged?  And then remove the old text from the
README.

-Scott