[RFC PATCH 0/5] Add QPIC SPI NAND driver support

[Md Sadre Alam]

Hi Miquel,

This series is RFC for QPIC NAND driver design for
both SPI NAND and RAW NAND.

We have already discuss this design in the below link

https://patchwork.kernel.org/project/linux-arm-msm/patch/1602307902-16761-3-git-send-email-mdalam@codeaurora.org/#25270814

Since QPIC controller support both raw and as wel as
serial nand, In these patch series I am trying to write
these driver as per above discussion.

As per this design we are having new drivrs for:

1) SPI-NAND Driver
2) RAW-NAND Driver
3) QPIC-COMMON-API Driver
4) ECC ENGINE Driver

Could you plese review these RFC patches and let me know
if i am doing as per design and my code are proper so that
i can proceed further.

I have testd SPI NAND enumeration with this new design.

Command supported currently by spi nand driver
1) RESET
2) READ ID
3) GET FEATURE
4) SET FEATURE

Currently READ_PAGE, WRITE_PAGE are dummy API. Will write
this later on after your review.

One more thisng wanted to add here Since for QPIC ECC engine
its not a separte HW IP, and only one register is there to control ECC
enable/disable. So for just for one register writing a separte driver
is fine or not?
In dt I have added like as below 

 bch: qpic_ecc {
                      compatible = "qcom,ipq9574-ecc";
                      status = "ok";
              };

Is this ok ?

Thanks,
Alam.

Md Sadre Alam (5):
  mtd: nand: ecc-qcom: Add support for ECC Engine Driver
  arm64: dts: qcom: ipq9574: Add ecc engine support
  mtd: nand: qpic_common: Add support for qpic common API
  spi: qpic: Add support for qpic spi nand driver
  arm64: dts: qcom: ipq9574: Add support for SPI nand

 arch/arm64/boot/dts/qcom/ipq9574-rdp433.dts |  56 +-
 arch/arm64/boot/dts/qcom/ipq9574.dtsi       |  33 +
 drivers/mtd/nand/Kconfig                    |   7 +
 drivers/mtd/nand/Makefile                   |   1 +
 drivers/mtd/nand/ecc-qcom.c                 | 198 +++++
 drivers/mtd/nand/qpic_common.c              | 840 ++++++++++++++++++++
 drivers/spi/Kconfig                         |   7 +
 drivers/spi/Makefile                        |   1 +
 drivers/spi/spi-qpic-snand.c                | 604 ++++++++++++++
 include/linux/mtd/nand-qpic-common.h        | 641 +++++++++++++++
 10 files changed, 2360 insertions(+), 28 deletions(-)
 create mode 100644 drivers/mtd/nand/ecc-qcom.c
 create mode 100644 drivers/mtd/nand/qpic_common.c
 create mode 100644 drivers/spi/spi-qpic-snand.c
 create mode 100644 include/linux/mtd/nand-qpic-common.h

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2.34.1