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Message-ID: <560BC0DB.5020205@ti.com> Date: Wed, 30 Sep 2015 14:00:43 +0300 From: Roger Quadros <rogerq@...com> To: <tony@...mide.com> CC: <dwmw2@...radead.org>, <computersforpeace@...il.com>, <ezequiel@...guardiasur.com.ar>, <javier@...hile0.org>, <fcooper@...com>, <nsekhar@...com>, <linux-mtd@...ts.infradead.org>, <linux-omap@...r.kernel.org>, <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org> Subject: Re: [PATCH v3 00/27] memory: omap-gpmc: mtd: nand: Support GPMC NAND on non-OMAP platforms Tony, 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@...hub.com:rogerq/linux.git > in branch > for-v4.4/gpmc-v3 I've verified this series with the following boards -dra7-evm -am437x-gp-evm -am335x-evm -beagleboard-c4 For legacy boot I've checked only on beagleboard-c4. Test procedure was to read an existing ubifs partition, create a new one and read it back. Need you to Ack if it looks good. Do you mind taking it via omap-soc once MTD maintainers ack their relevant parts? 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 > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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