linux-kernel - [PATCH v3 0/5] mtd: Qualcomm NAND controller driver

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Date:	Mon,  3 Aug 2015 10:38:13 +0530
From:	Archit Taneja <architt@...eaurora.org>
To:	linux-mtd@...ts.infradead.org, dehrenberg@...gle.com,
	cernekee@...il.com, computersforpeace@...il.com
Cc:	linux-arm-msm@...r.kernel.org, agross@...eaurora.org,
	sboyd@...eaurora.org, linux-kernel@...r.kernel.org,
	Archit Taneja <architt@...eaurora.org>
Subject: [PATCH v3 0/5] mtd: Qualcomm NAND controller driver

Add support for the NAND controller driver for SoC's that contain EBI2.
For now, the only SoC upstream that has EBI2 is IPQ806x.

The original version was posted a while back. The main comments were
about the driver not being able to use nand_bbt. This was because the
controller could read factory bad block markers only in RAW mode. This
forced us to implement our own versions of chip->block_bad and
chip->blobk_markbad, and also we had to skip creating a BBT.

Discussions with Kevin Cernekee concluded that having a new BBT flag
that incorporates this controller's special requirement is a possible
option.

The new version makes use of this flag and now uses nand_bbt, at the
cost of implement read_oob_raw and write_oob_raw ops.

The patchset requires the v6 ADM dmaengine patches posted by Andy:

https://lkml.org/lkml/2015/3/17/19

v3:
- Various fixes and clean ups suggested by Stephen Boyd.

v2:
- Added a new BBT flag that allows us to read BBM in raw mode
- reduce memcpy-s in the driver
- some refactor and clean ups because of above changes

v1:
- original series:
  https://lkml.org/lkml/2015/1/16/317


Archit Taneja (5):
  mtd: nand: Create a BBT flag to access bad block markers in raw mode
  mtd: nand: Qualcomm NAND controller driver
  dt/bindings: qcom_nandc: Add DT bindings
  arm: qcom: dts: Add NAND controller node for ipq806x
  arm: qcom: dts: Enable NAND node on IPQ8064 AP148 platform

 .../devicetree/bindings/mtd/qcom_nandc.txt         |   49 +
 arch/arm/boot/dts/qcom-ipq8064-ap148.dts           |   36 +
 arch/arm/boot/dts/qcom-ipq8064.dtsi                |   15 +
 drivers/mtd/nand/Kconfig                           |    7 +
 drivers/mtd/nand/Makefile                          |    1 +
 drivers/mtd/nand/nand_base.c                       |    6 +-
 drivers/mtd/nand/nand_bbt.c                        |    6 +-
 drivers/mtd/nand/qcom_nandc.c                      | 1913 ++++++++++++++++++++
 include/linux/mtd/bbm.h                            |    7 +
 9 files changed, 2038 insertions(+), 2 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/mtd/qcom_nandc.txt
 create mode 100644 drivers/mtd/nand/qcom_nandc.c

-- 
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
hosted by The Linux Foundation

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