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author | Minal Shah <minalkshah@gmail.com> | 2014-05-19 14:45:47 +0530 |
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committer | Tony Lindgren <tony@atomide.com> | 2014-05-19 17:20:31 -0700 |
commit | ff66a3c86e004ce83f7c6e5f459d65c87f9d02b6 (patch) | |
tree | 5eef6e8cfd9ebd9f8657b51ccd0eb26f1968fe6d /arch/arm/boot/dts/dra7-evm.dts | |
parent | 7b25babf6ebd3f9b182f3c78021f4dc87d77ed85 (diff) | |
download | blackbird-op-linux-ff66a3c86e004ce83f7c6e5f459d65c87f9d02b6.tar.gz blackbird-op-linux-ff66a3c86e004ce83f7c6e5f459d65c87f9d02b6.zip |
ARM: dts: dra7: add support for parallel NAND flash
DRA7xx platform has in-build GPMC and ELM h/w engines which can be used
for accessing externel NAND flash device. This patch:
- adds generic DT binding in dra7.dtsi for enabling GPMC and ELM h/w engines
- adds DT binding for Micron NAND Flash (MT29F2G16AADWP) present on dra7-evm
*Important*
On DRA7 EVM, GPMC_WPN and NAND_BOOTn are controlled by DIP switch
So following board settings are required for NAND device detection:
SW5.9 (GPMC_WPN) = LOW
SW5.1 (NAND_BOOTn) = HIGH
Signed-off-by: Minal Shah <minalkshah@gmail.com>
Signed-off-by: Pekon Gupta <pekon@ti.com>
Reviewed-by: Javier Martinez Canillas <javier@dowhile0.org>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Diffstat (limited to 'arch/arm/boot/dts/dra7-evm.dts')
-rw-r--r-- | arch/arm/boot/dts/dra7-evm.dts | 118 |
1 files changed, 118 insertions, 0 deletions
diff --git a/arch/arm/boot/dts/dra7-evm.dts b/arch/arm/boot/dts/dra7-evm.dts index ec779072a0a3..4adc28039c30 100644 --- a/arch/arm/boot/dts/dra7-evm.dts +++ b/arch/arm/boot/dts/dra7-evm.dts @@ -120,6 +120,37 @@ 0x284 (PIN_INPUT_SLEW | MUX_MODE0) /* usb2_drvvbus */ >; }; + + nand_flash_x16: nand_flash_x16 { + /* On DRA7 EVM, GPMC_WPN and NAND_BOOTn comes from DIP switch + * So NAND flash requires following switch settings: + * SW5.9 (GPMC_WPN) = LOW + * SW5.1 (NAND_BOOTn) = HIGH */ + pinctrl-single,pins = < + 0x0 (PIN_INPUT | MUX_MODE0) /* gpmc_ad0 */ + 0x4 (PIN_INPUT | MUX_MODE0) /* gpmc_ad1 */ + 0x8 (PIN_INPUT | MUX_MODE0) /* gpmc_ad2 */ + 0xc (PIN_INPUT | MUX_MODE0) /* gpmc_ad3 */ + 0x10 (PIN_INPUT | MUX_MODE0) /* gpmc_ad4 */ + 0x14 (PIN_INPUT | MUX_MODE0) /* gpmc_ad5 */ + 0x18 (PIN_INPUT | MUX_MODE0) /* gpmc_ad6 */ + 0x1c (PIN_INPUT | MUX_MODE0) /* gpmc_ad7 */ + 0x20 (PIN_INPUT | MUX_MODE0) /* gpmc_ad8 */ + 0x24 (PIN_INPUT | MUX_MODE0) /* gpmc_ad9 */ + 0x28 (PIN_INPUT | MUX_MODE0) /* gpmc_ad10 */ + 0x2c (PIN_INPUT | MUX_MODE0) /* gpmc_ad11 */ + 0x30 (PIN_INPUT | MUX_MODE0) /* gpmc_ad12 */ + 0x34 (PIN_INPUT | MUX_MODE0) /* gpmc_ad13 */ + 0x38 (PIN_INPUT | MUX_MODE0) /* gpmc_ad14 */ + 0x3c (PIN_INPUT | MUX_MODE0) /* gpmc_ad15 */ + 0xd8 (PIN_INPUT_PULLUP | MUX_MODE0) /* gpmc_wait0 */ + 0xcc (PIN_OUTPUT | MUX_MODE0) /* gpmc_wen */ + 0xb4 (PIN_OUTPUT_PULLUP | MUX_MODE0) /* gpmc_csn0 */ + 0xc4 (PIN_OUTPUT | MUX_MODE0) /* gpmc_advn_ale */ + 0xc8 (PIN_OUTPUT | MUX_MODE0) /* gpmc_oen_ren */ + 0xd0 (PIN_OUTPUT | MUX_MODE0) /* gpmc_be0n_cle */ + >; + }; }; &i2c1 { @@ -377,3 +408,90 @@ pinctrl-names = "default"; pinctrl-0 = <&usb2_pins>; }; + +&elm { + status = "okay"; +}; + +&gpmc { + status = "okay"; + pinctrl-names = "default"; + pinctrl-0 = <&nand_flash_x16>; + ranges = <0 0 0 0x01000000>; /* minimum GPMC partition = 16MB */ + nand@0,0 { + reg = <0 0 4>; /* device IO registers */ + ti,nand-ecc-opt = "bch8"; + ti,elm-id = <&elm>; + nand-bus-width = <16>; + gpmc,device-width = <2>; + gpmc,sync-clk-ps = <0>; + gpmc,cs-on-ns = <0>; + gpmc,cs-rd-off-ns = <40>; + gpmc,cs-wr-off-ns = <40>; + gpmc,adv-on-ns = <0>; + gpmc,adv-rd-off-ns = <30>; + gpmc,adv-wr-off-ns = <30>; + gpmc,we-on-ns = <5>; + gpmc,we-off-ns = <25>; + gpmc,oe-on-ns = <2>; + gpmc,oe-off-ns = <20>; + gpmc,access-ns = <20>; + gpmc,wr-access-ns = <40>; + gpmc,rd-cycle-ns = <40>; + gpmc,wr-cycle-ns = <40>; + gpmc,wait-pin = <0>; + gpmc,wait-on-read; + gpmc,wait-on-write; + gpmc,bus-turnaround-ns = <0>; + gpmc,cycle2cycle-delay-ns = <0>; + gpmc,clk-activation-ns = <0>; + gpmc,wait-monitoring-ns = <0>; + gpmc,wr-data-mux-bus-ns = <0>; + /* MTD partition table */ + /* All SPL-* partitions are sized to minimal length + * which can be independently programmable. For + * NAND flash this is equal to size of erase-block */ + #address-cells = <1>; + #size-cells = <1>; + partition@0 { + label = "NAND.SPL"; + reg = <0x00000000 0x000020000>; + }; + partition@1 { + label = "NAND.SPL.backup1"; + reg = <0x00020000 0x00020000>; + }; + partition@2 { + label = "NAND.SPL.backup2"; + reg = <0x00040000 0x00020000>; + }; + partition@3 { + label = "NAND.SPL.backup3"; + reg = <0x00060000 0x00020000>; + }; + partition@4 { + label = "NAND.u-boot-spl-os"; + reg = <0x00080000 0x00040000>; + }; + partition@5 { + label = "NAND.u-boot"; + reg = <0x000c0000 0x00100000>; + }; + partition@6 { + label = "NAND.u-boot-env"; + reg = <0x001c0000 0x00020000>; + }; + partition@7 { + label = "NAND.u-boot-env"; + reg = <0x001e0000 0x00020000>; + }; + partition@8 { + label = "NAND.kernel"; + reg = <0x00200000 0x00800000>; + }; + partition@9 { + label = "NAND.file-system"; + reg = <0x00a00000 0x0f600000>; + }; + }; +}; |