[U-Boot] [PATCH 0/4] nand: davinci: enable driver model for NAND
brgl at bgdev.pl
Fri Jun 7 08:16:28 UTC 2019
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
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.
> > 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
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