[U-Boot] [PATCH 0/4] nand: davinci: enable driver model for NAND

[Bartosz Golaszewski]

czw., 6 cze 2019 o 17:58 Adam Ford <aford173 at gmail.com> napisał(a):
>
> On Thu, Jun 6, 2019 at 10:50 AM Bartosz Golaszewski <brgl at bgdev.pl> wrote:
> >
> > From: Bartosz Golaszewski <bgolaszewski at baylibre.com>
> >
> > This series enables the driver model for NAND on davinci da850 boards.
> >
> > The first patch is a simple tweak for an unnecessarily exported function.
> >
> > The second patch extends the NAND driver to support both legacy and
> > driver-model users. For now we don't parse the device-tree as it's a
> > bit complicated on da850, namely: the nand node is a child of the
> > aemif node for which we don't have a driver in u-boot (unlike on linux
> > where the aemif driver populates all its subnodes). In order for the
> > nand device to be probed, we're adding a dummy node to the u-boot dts
> > extensions with an appropriate compatible.
> >
> > Two last patches enable driver model for NAND on da850-lcdk and da850-evm.
> > We don't enable the driver model in SPL as first: the patches enabling
> > CONFIG_SPL_DM are still waiting to be merged, and second: the
> > nand_spl_simple driver used by davinci SPL doesn't support driver model
> > users. This is planned for future series once some basic support is
> > merged.
>
> What happens when the board is booting SPL from NAND?  Will it still
> work as expected?  I know the da850-evm has at least one configuration
> which this is intended to boot from NAND instead of the default SPI
> flash.
>

The driver works just like before in SPL. The support for the driver
model is added incrementally. In fact I tested it on da850-lcdk with
SPL loading u-boot from NAND.

On da850-evm we could probably enable driver-model in SPL as well for
NAND, but I prefer to do it at once for both boards.

Bart

> adam
>
> >
> > Bartosz Golaszewski (4):
> >   nand: davinci: make davinci_nand_init() static
> >   nand: davinci: add support for driver model
> >   davinci: omapl138-lcdk: enable driver model for NAND
> >   davinci: da850-evm: enable driver model for NAND
> >
> >  arch/arm/dts/da850-evm-u-boot.dtsi            |  4 ++
> >  arch/arm/dts/da850-lcdk-u-boot.dtsi           |  4 ++
> >  arch/arm/include/asm/ti-common/davinci_nand.h |  2 -
> >  configs/da850evm_defconfig                    |  1 +
> >  configs/da850evm_direct_nor_defconfig         |  1 +
> >  configs/da850evm_nand_defconfig               |  1 +
> >  configs/omapl138_lcdk_defconfig               |  1 +
> >  drivers/mtd/nand/raw/davinci_nand.c           | 48 ++++++++++++++++++-
> >  include/configs/da850evm.h                    |  4 ++
> >  include/configs/omapl138_lcdk.h               |  4 ++
> >  10 files changed, 66 insertions(+), 4 deletions(-)
> >
> > --
> > 2.21.0
> >