diff options
author | Pekon Gupta <pekon@ti.com> | 2014-05-19 14:45:46 +0530 |
---|---|---|
committer | Tony Lindgren <tony@atomide.com> | 2014-05-27 14:22:31 -0700 |
commit | 99ffa6425f1b9ac39c5e9946c1c286f687b97c3e (patch) | |
tree | acf10444f4b64f6ff73d3223a2e73aa7e20ca405 /arch/arm/boot/dts/am437x-gp-evm.dts | |
parent | 2e091d13e65d26f21159323b95b426e5bc42670c (diff) | |
download | linux-99ffa6425f1b9ac39c5e9946c1c286f687b97c3e.tar.bz2 |
ARM: dts: am437x-gp-evm: add support for parallel NAND flash
Adds pinmux and DT node for Micron (MT29F4G08AB) x8 NAND device present on
am437x-gp-evm board.
(1) As NAND Flash data lines are muxed with eMMC, Thus at a given time either
eMMC or NAND can be enabled. Selection between eMMC and NAND is controlled:
(a) By dynamically driving following GPIO pin from software
SPI2_CS0(GPIO) == 0 NAND is selected (default)
SPI2_CS0(GPIO) == 1 eMMC is selected
(b) By statically using Jumper (J89) on the board
(2) As NAND device connnected to this board has page-size=4K and oob-size=224,
So ROM code expects boot-loaders to be flashed in BCH16 ECC scheme for
NAND boot.
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/am437x-gp-evm.dts')
-rw-r--r-- | arch/arm/boot/dts/am437x-gp-evm.dts | 108 |
1 files changed, 108 insertions, 0 deletions
diff --git a/arch/arm/boot/dts/am437x-gp-evm.dts b/arch/arm/boot/dts/am437x-gp-evm.dts index 30ace1b399ee..f432685957b8 100644 --- a/arch/arm/boot/dts/am437x-gp-evm.dts +++ b/arch/arm/boot/dts/am437x-gp-evm.dts @@ -150,6 +150,27 @@ 0x14c (PIN_INPUT_PULLDOWN | MUX_MODE7) >; }; + + nand_flash_x8: nand_flash_x8 { + pinctrl-single,pins = < + 0x26c(PIN_OUTPUT_PULLDOWN | MUX_MODE7) /* spi2_cs0.gpio/eMMCorNANDsel */ + 0x0 (PIN_INPUT | MUX_MODE0) /* gpmc_ad0.gpmc_ad0 */ + 0x4 (PIN_INPUT | MUX_MODE0) /* gpmc_ad1.gpmc_ad1 */ + 0x8 (PIN_INPUT | MUX_MODE0) /* gpmc_ad2.gpmc_ad2 */ + 0xc (PIN_INPUT | MUX_MODE0) /* gpmc_ad3.gpmc_ad3 */ + 0x10 (PIN_INPUT | MUX_MODE0) /* gpmc_ad4.gpmc_ad4 */ + 0x14 (PIN_INPUT | MUX_MODE0) /* gpmc_ad5.gpmc_ad5 */ + 0x18 (PIN_INPUT | MUX_MODE0) /* gpmc_ad6.gpmc_ad6 */ + 0x1c (PIN_INPUT | MUX_MODE0) /* gpmc_ad7.gpmc_ad7 */ + 0x70 (PIN_INPUT_PULLUP | MUX_MODE0) /* gpmc_wait0.gpmc_wait0 */ + 0x74 (PIN_OUTPUT_PULLUP | MUX_MODE7) /* gpmc_wpn.gpmc_wpn */ + 0x7c (PIN_OUTPUT | MUX_MODE0) /* gpmc_csn0.gpmc_csn0 */ + 0x90 (PIN_OUTPUT | MUX_MODE0) /* gpmc_advn_ale.gpmc_advn_ale */ + 0x94 (PIN_OUTPUT | MUX_MODE0) /* gpmc_oen_ren.gpmc_oen_ren */ + 0x98 (PIN_OUTPUT | MUX_MODE0) /* gpmc_wen.gpmc_wen */ + 0x9c (PIN_OUTPUT | MUX_MODE0) /* gpmc_be0n_cle.gpmc_be0n_cle */ + >; + }; }; &i2c0 { @@ -246,3 +267,90 @@ phy_id = <&davinci_mdio>, <0>; phy-mode = "rgmii"; }; + +&elm { + status = "okay"; +}; + +&gpmc { + status = "okay"; + pinctrl-names = "default"; + pinctrl-0 = <&nand_flash_x8>; + 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 = <8>; + gpmc,device-width = <1>; + 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 = <25>; + gpmc,adv-wr-off-ns = <25>; + gpmc,we-on-ns = <0>; + gpmc,we-off-ns = <20>; + gpmc,oe-on-ns = <3>; + gpmc,oe-off-ns = <30>; + gpmc,access-ns = <30>; + 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-access-ns = <40>; + 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 0x00040000>; + }; + partition@1 { + label = "NAND.SPL.backup1"; + reg = <0x00040000 0x00040000>; + }; + partition@2 { + label = "NAND.SPL.backup2"; + reg = <0x00080000 0x00040000>; + }; + partition@3 { + label = "NAND.SPL.backup3"; + reg = <0x000c0000 0x00040000>; + }; + partition@4 { + label = "NAND.u-boot-spl-os"; + reg = <0x00100000 0x00080000>; + }; + partition@5 { + label = "NAND.u-boot"; + reg = <0x00180000 0x00100000>; + }; + partition@6 { + label = "NAND.u-boot-env"; + reg = <0x00280000 0x00040000>; + }; + partition@7 { + label = "NAND.u-boot-env.backup1"; + reg = <0x002c0000 0x00040000>; + }; + partition@8 { + label = "NAND.kernel"; + reg = <0x00300000 0x00700000>; + }; + partition@9 { + label = "NAND.file-system"; + reg = <0x00a00000 0x1f600000>; + }; + }; +}; |