Hello Maxime,
Am 09.11.2016 um 15:44 schrieb Maxime Ripard:
Hi Heiko,
On Wed, Nov 09, 2016 at 08:47:12AM +0100, Heiko Schocher wrote:
Am 08.11.2016 um 17:21 schrieb Maxime Ripard:
The CHIP Pro is a SoM made by NextThing Co, and that embeds a GR8 SIP, an
AXP209 PMIC, a WiFi BT chip and a 512MB SLC NAND.
Since the first Allwinner device coming whit an SLC NAND that doesn't have
the shortcomings (and breakages) the MLC NAND has, we can finally enable
the NAND support on a board by default.
This is the occasion to introduce a bunch of additions needed imo to be
able to come up with a sane NAND support for our users.
The biggest pain point is that the BROM uses a different ECC and randomizer
configuration than for the rest of the NAND. In order to lessen the number
of bitflips, you also need to pad with random data the SPL image.
Since it's quite tedious to do right (and most users won't be able to
figure it out) and since if it is not done right, it will eventually turn
into an unusable system (which is bad UX), we think that the best solution
is to generate an SPL image that already embeds all this. We'll possible
have to do the same thing for the U-Boot image (at least for the random
padding) on MLC NANDs.
The only drawback from that is that you need to flash it raw, instead of
using the usual nand write, but it's just a different command, nothing
major anyway.
In order to flash it, from a device switched in FEL, on your host:
sunxi-fel spl spl/sunxi-spl.bin
sunxi-fel write 0x4a000000 u-boot-dtb.bin
sunxi-fel write 0x43000000 spl/sunxi-spl-with-ecc.bin
sunxi-fel exe 0x4a000000
And on the board, once u-boot is running (assuming the NAND is already
erased):
nand write.raw.noverify 0x43000000 0 40
nand write.raw.noverify 0x43000000 0x400000 40
nand write 0x4a000000 0x800000 0xc0000
I also encountered some weird bug in the private libgcc that prevents
U-Boot from loading. Disabling CONFIG_USE_PRIVATE_LIBGCC fixes that.
What was the problem?
It has been reported here:
http://lists.denx.de/pipermail/u-boot/2016-August/264513.html
Hmm.. could not find, what was the real problem ...
Let me know what you think,
Maxime
Boris Brezillon (1):
mtd: nand: add support for the TC58NVG2S0H chip
Hans de Goede (1):
sunxi: Enable UBI and NAND support
Maxime Ripard (5):
sunxi: Sync GR8 DTS and AXP209 with the kernel
tools: sunxi: Add spl image builder
nand: sunxi: Add options for the SPL NAND configuration
scripts: sunxi: Build an raw SPL image
sunxi: Add support for the CHIP Pro
Makefile | 3 +-
arch/arm/dts/Makefile | 1 +-
arch/arm/dts/axp209.dtsi | 6 +-
arch/arm/dts/ntc-gr8-chip-pro.dts | 266 +++++++-
arch/arm/dts/ntc-gr8.dtsi | 1132 ++++++++++++++++++++++++++++++-
configs/CHIP_pro_defconfig | 27 +-
drivers/mtd/nand/Kconfig | 16 +-
drivers/mtd/nand/nand_ids.c | 3 +-
include/configs/sunxi-common.h | 26 +-
scripts/Makefile.spl | 12 +-
tools/.gitignore | 1 +-
tools/Makefile | 1 +-
tools/sunxi-spl-image-builder.c | 1113 +++++++++++++++++++++++++++++-
13 files changed, 2603 insertions(+), 4 deletions(-)
create mode 100644 arch/arm/dts/ntc-gr8-chip-pro.dts
create mode 100644 arch/arm/dts/ntc-gr8.dtsi
create mode 100644 configs/CHIP_pro_defconfig
create mode 100644 tools/sunxi-spl-image-builder.c
base-commit: d8bdfc80da39211d95f10d24e79f2e867305f71b
Can you please add a README file, where the above things are explained?
Sure, where do you want me to put it? in doc/README.* or somewhere
else?
Yes, may doc/README.sunxi ?
Thanks!
bye,
Heiko
--
DENX Software Engineering GmbH, Managing Director: Wolfgang Denk
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
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