Re: [PATCH v3 00/27] memory: omap-gpmc: mtd: nand: Support GPMC NAND on non-OMAP platforms

[Roger Quadros]

Brian/David,

On 18/09/15 17:53, Roger Quadros wrote:
> Hi,
> 
> We do a couple of things in this series which result in
> cleaner device tree implementation, faster perfomance and
> multi-platform support. As an added bonus we get new GPI/Interrupt pins
> for use in the system.
> 
> - Establish a custom interface between NAND and GPMC driver. This is
> needed because all of the NAND registers sit in the GPMC register space.
> Some bits like NAND IRQ are even shared with GPMC.
> 
> - Remove NAND IRQ handling from omap-gpmc driver, share the GPMC IRQ
> with the omap2-nand driver and handle NAND IRQ events in the NAND driver.
> This causes performance increase when using prefetch-irq mode.
> 30% increase in read, 17% increase in write in prefetch-irq mode.
> 
> - Clean up device tree support so that omap-gpmc IP and the omap2 NAND
> driver can be used on non-OMAP platforms. e.g. Keystone.
> 
> - Implement GPIOCHIP + IRQCHIP for the GPMC WAITPINS. SoCs can contain
> 2 to 4 of these and most of them would be unused otherwise. It also
> allows a cleaner implementation of NAND Ready pin status for the NAND driver.
> 
> - Implement GPIOlib based NAND ready pin checking for OMAP NAND driver.
> 
> This series is available at
> git@xxxxxxxxxx:rogerq/linux.git
> in branch
> for-v4.4/gpmc-v3

Could you please ack the patches affecting the omap2 nand driver?
These would be patches 4, 6, 9, 10, 11, 12, 18. Thanks.

cheers,
-roger

> 
> Changelog:
> v3:
> -Fixed and tested NAND using legacy boot on omap3-beagle.
> -Support rising and falling edge interrupts on WAITpins.
> -Update DT node of all gpmc users.
> 
> Roger Quadros (27):
>   ARM: OMAP2+: gpmc: Add platform data
>   ARM: OMAP2+: gpmc: Add gpmc timings and settings to platform data
>   memory: omap-gpmc: Introduce GPMC to NAND interface
>   mtd: nand: omap2: Use gpmc_omap_get_nand_ops() to get NAND registers
>   memory: omap-gpmc: Add GPMC-NAND ops to get writebufferempty status
>   mtd: nand: omap2: Switch to using GPMC-NAND ops for writebuffer empty
>     check
>   memory: omap-gpmc: Remove NAND IRQ code
>   memory: omap-gpmc: Add IRQ ops for GPMC-NAND interface
>   mtd: nand: omap2: manage NAND interrupts
>   mtd: nand: omap: Copy platform data parameters to omap_nand_info data
>   mtd: nand: omap: Clean up device tree support
>   mtd: nand: omap: Update DT binding documentation
>   memory: omap-gpmc: Prevent mapping into 1st 16MB
>   memory: omap-gpmc: Move device tree binding to correct location
>   memory: omap-gpmc: Support general purpose input for WAITPINs
>   memory: omap-gpmc: Reserve WAITPIN if needed for WAIT monitoring
>   memory: omap-gpmc: Add irqchip support to the gpiochip
>   mtd: nand: omap2: Implement NAND ready using gpiolib
>   memory: omap-gpmc: Prevent GPMC_STATUS from being accessed via
>     gpmc_regs
>   ARM: dts: dra7: Fix NAND device nodes.
>   ARM: dts: dra7x-evm: Provide NAND ready pin
>   ARM: dts: am437x: Fix NAND device nodes
>   ARM: dts: am437x-gp-evm: Provide NAND ready pin
>   ARM: dts: am335x: Fix NAND device nodes
>   ARM: dts: am335x: Provide NAND ready pin
>   ARM: dts: dm816x: Fix gpmc and NAND node
>   ARM: dts: omap3: Fix gpmc and NAND nodes
> 
>  Documentation/devicetree/bindings/bus/ti-gpmc.txt  | 130 -----
>  .../bindings/memory-controllers/omap-gpmc.txt      | 130 +++++
>  .../devicetree/bindings/mtd/gpmc-nand.txt          |  16 +-
>  arch/arm/boot/dts/am335x-chilisom.dtsi             |   7 +-
>  arch/arm/boot/dts/am335x-evm.dts                   |   7 +-
>  arch/arm/boot/dts/am335x-igep0033.dtsi             |   7 +-
>  arch/arm/boot/dts/am33xx.dtsi                      |   4 +
>  arch/arm/boot/dts/am4372.dtsi                      |   4 +
>  arch/arm/boot/dts/am437x-gp-evm.dts                |   8 +-
>  arch/arm/boot/dts/am43x-epos-evm.dts               |   8 +-
>  arch/arm/boot/dts/dm8168-evm.dts                   |   7 +-
>  arch/arm/boot/dts/dm816x.dtsi                      |   4 +
>  arch/arm/boot/dts/dra7-evm.dts                     |   6 +-
>  arch/arm/boot/dts/dra7.dtsi                        |   4 +
>  arch/arm/boot/dts/dra72-evm.dts                    |   6 +-
>  arch/arm/boot/dts/logicpd-torpedo-som.dtsi         |   7 +-
>  arch/arm/boot/dts/omap3-beagle.dts                 |   2 +
>  arch/arm/boot/dts/omap3-cm-t3x.dtsi                |   5 +-
>  arch/arm/boot/dts/omap3-devkit8000-common.dtsi     |   3 +
>  arch/arm/boot/dts/omap3-evm-37xx.dts               |   7 +-
>  arch/arm/boot/dts/omap3-gta04.dtsi                 |   3 +
>  arch/arm/boot/dts/omap3-igep.dtsi                  |   5 +-
>  arch/arm/boot/dts/omap3-igep0020-common.dtsi       |   4 +-
>  arch/arm/boot/dts/omap3-igep0030-common.dtsi       |   4 +
>  arch/arm/boot/dts/omap3-ldp.dts                    |   9 +-
>  arch/arm/boot/dts/omap3-lilly-a83x.dtsi            |   5 +-
>  arch/arm/boot/dts/omap3-pandora-common.dtsi        |   3 +
>  arch/arm/boot/dts/omap3-tao3530.dtsi               |   5 +-
>  arch/arm/boot/dts/omap3.dtsi                       |   4 +
>  arch/arm/boot/dts/omap3430-sdp.dts                 |   5 +-
>  arch/arm/mach-omap2/gpmc-nand.c                    |  11 +-
>  drivers/memory/omap-gpmc.c                         | 640 ++++++++++++---------
>  drivers/mtd/nand/omap2.c                           | 261 ++++++---
>  include/linux/omap-gpmc.h                          | 183 ++----
>  include/linux/platform_data/gpmc-omap.h            | 167 ++++++
>  include/linux/platform_data/mtd-nand-omap2.h       |  12 +-
>  36 files changed, 1045 insertions(+), 648 deletions(-)
>  delete mode 100644 Documentation/devicetree/bindings/bus/ti-gpmc.txt
>  create mode 100644 Documentation/devicetree/bindings/memory-controllers/omap-gpmc.txt
>  create mode 100644 include/linux/platform_data/gpmc-omap.h
> 
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