pt., 7 cze 2019 o 10:16 Bartosz Golaszewski brgl@bgdev.pl napisał(a):
czw., 6 cze 2019 o 17:58 Adam Ford aford173@gmail.com napisał(a):
On Thu, Jun 6, 2019 at 10:50 AM Bartosz Golaszewski brgl@bgdev.pl wrote:
From: Bartosz Golaszewski bgolaszewski@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
Hi Tom,
can you pick up this series?
Bart