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Commit cc54e96b authored by Pavan Anamula's avatar Pavan Anamula
Browse files

mtd: msm_qpic_nand: Adding qpic nand driver 



Add msm_qpic_nand driver and supported files,
for QPIC based NAND controller.

Change-Id: I568b8c7ed98afab60fe6a254a4f81aeb46436691
Signed-off-by: default avatarPavan Anamula <pavana@codeaurora.org>
parent da9777c8

Documentation/devicetree/bindings/mtd/msm_qpic_nand.txt

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+65 −0
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Qualcomm Technologies, Inc. Parallel Interface controller (QPIC) for NAND devices



Required properties:

- compatible : "qcom,msm-nand".

- reg : should specify QPIC NANDc and BAM physical address range.

- reg-names : should specify relevant names to each reg property defined.

- interrupts : should specify QPIC/BAM interrupt numbers.

- interrupt-names : should specify relevant names to each interrupts property

  defined.



MTD flash partition layout for NAND devices -



Each partition is represented as a sub-node of the qcom,mtd-partitions device.

Each node's name represents the name of the corresponding partition.



This is now completely optional as the partition information is avaialble from

bootloader.



Optional properties:

- reg : The partition offset and size

- label : The label / name for this partition.

- read-only: This parameter, if present, indicates that this partition

  should only be mounted read-only.

- Refer to "Documentation/devicetree/bindings/arm/msm/msm_bus.txt" for

below optional properties:

	- qcom,msm-bus,name

	- qcom,msm-bus,num-cases

	- qcom,msm-bus,active-only

	- qcom,msm-bus,num-paths

	- qcom,msm-bus,vectors-KBps



Examples:



	qcom,nand@f9af0000 {

		compatible = "qcom,msm-nand";

		reg = <0xf9af0000 0x1000>,

		      <0xf9ac4000 0x8000>;

		reg-names = "nand_phys",

			    "bam_phys";

		interrupts = <0 279 0>;

		interrupt-names = "bam_irq";



		qcom,msm-bus,name = "qpic_nand";

		qcom,msm-bus,num-cases = <1>;

		qcom,msm-bus,num-paths = <1>;

		qcom,msm-bus,vectors-KBps = <91 512 0 0>,

	};



       qcom,mtd-partitions {

	       #address-cells = <1>;

	       #size-cells = <1>;

               partition@0 {

                       label = "boot";

                       reg = <0x0 0x1000>;

		       read-only;

               };

               partition@20000 {

                       label = "userdata";

                       reg = <0x20000 0x1000>;

               };

               partition@40000 {

                       label = "system";

                       reg = <0x40000 0x1000>;

               };

       };

drivers/mtd/devices/Kconfig

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@@ -50,6 +50,19 @@ config MTD_MS02NV 
	  say M here and read <file:Documentation/kbuild/modules.txt>.

	  The module will be called ms02-nv.



config MTD_MSM_QPIC_NAND

	tristate "MSM QPIC NAND Device Support"

	depends on MTD && ARCH_MSM && !MTD_MSM_NAND

	select CRC16

	select BITREVERSE

	select MTD_NAND_IDS

	default n

	help

	  Support for NAND controller in Qualcomm Technologies, Inc.

	  Parallel Interface controller (QPIC). This new controller

	  supports BAM mode and BCH error correction mechanism. Based on the

	  device capabilities either 4 bit or 8 bit BCH ECC will be used.



config MTD_DATAFLASH

	tristate "Support for AT45xxx DataFlash"

	depends on SPI_MASTER

drivers/mtd/devices/Makefile

+1 −0
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@@ -10,6 +10,7 @@ obj-$(CONFIG_MTD_MS02NV) += ms02-nv.o 
obj-$(CONFIG_MTD_MTDRAM)	+= mtdram.o

obj-$(CONFIG_MTD_LART)		+= lart.o

obj-$(CONFIG_MTD_BLOCK2MTD)	+= block2mtd.o

obj-$(CONFIG_MTD_MSM_QPIC_NAND) += msm_qpic_nand.o

obj-$(CONFIG_MTD_DATAFLASH)	+= mtd_dataflash.o

obj-$(CONFIG_MTD_M25P80)	+= m25p80.o

obj-$(CONFIG_MTD_SPEAR_SMI)	+= spear_smi.o