From f68e355c86cff91e5266cf937ea24fcba0641900 Mon Sep 17 00:00:00 2001 From: Pekon Gupta Date: Wed, 5 Feb 2014 18:58:34 +0530 Subject: [PATCH] ARM: dts: am43xx: add support for parallel NAND flash This patch: - enables GPMC h/w and ELM h/w engine for AM43xx devices (am4372.dtsi) - adds pinmux and DT node for Micron 4K-paged x8 NAND device (MT29F4G08AB) present on following boards: am43x-epos-evm: On this board, NAND Flash control lines are muxed with QSPI, Thus only one of the two can be used at a time. Selection is controlled by: (a) dynamically driving following GPIO pin from software GPMC_A0(GPIO) == 0 NAND is selected (default) GPMC_A0(GPIO) == 1 eMMC is selected Signed-off-by: Pekon Gupta Signed-off-by: Tony Lindgren --- arch/arm/boot/dts/am4372.dtsi | 24 ++++++ arch/arm/boot/dts/am43x-epos-evm.dts | 107 +++++++++++++++++++++++++++ 2 files changed, 131 insertions(+) diff --git a/arch/arm/boot/dts/am4372.dtsi b/arch/arm/boot/dts/am4372.dtsi index eb74ab82aa94..a4555bedd713 100644 --- a/arch/arm/boot/dts/am4372.dtsi +++ b/arch/arm/boot/dts/am4372.dtsi @@ -701,6 +701,30 @@ <&edma 11>; dma-names = "tx", "rx"; }; + + elm: elm@48080000 { + compatible = "ti,am3352-elm"; + reg = <0x48080000 0x2000>; + interrupts = ; + ti,hwmods = "elm"; + clocks = <&l4ls_gclk>; + clock-names = "fck"; + status = "disabled"; + }; + + gpmc: gpmc@50000000 { + compatible = "ti,am3352-gpmc"; + ti,hwmods = "gpmc"; + clocks = <&l3s_gclk>; + clock-names = "fck"; + reg = <0x50000000 0x2000>; + interrupts = ; + gpmc,num-cs = <7>; + gpmc,num-waitpins = <2>; + #address-cells = <2>; + #size-cells = <1>; + status = "disabled"; + }; }; }; diff --git a/arch/arm/boot/dts/am43x-epos-evm.dts b/arch/arm/boot/dts/am43x-epos-evm.dts index fbf9c4c7a94f..15aa70822bdf 100644 --- a/arch/arm/boot/dts/am43x-epos-evm.dts +++ b/arch/arm/boot/dts/am43x-epos-evm.dts @@ -79,6 +79,27 @@ 0x18c (PIN_INPUT_PULLUP | SLEWCTRL_FAST | MUX_MODE0) /* i2c0_scl.i2c0_scl */ >; }; + + nand_flash_x8: nand_flash_x8 { + pinctrl-single,pins = < + 0x40 (PIN_OUTPUT_PULLDOWN | MUX_MODE7) /* gpmc_a0.SELQSPIorNAND/GPIO */ + 0x0 (PIN_INPUT_PULLDOWN | MUX_MODE0) /* gpmc_ad0.gpmc_ad0 */ + 0x4 (PIN_INPUT_PULLDOWN | MUX_MODE0) /* gpmc_ad1.gpmc_ad1 */ + 0x8 (PIN_INPUT_PULLDOWN | MUX_MODE0) /* gpmc_ad2.gpmc_ad2 */ + 0xc (PIN_INPUT_PULLDOWN | MUX_MODE0) /* gpmc_ad3.gpmc_ad3 */ + 0x10 (PIN_INPUT_PULLDOWN | MUX_MODE0) /* gpmc_ad4.gpmc_ad4 */ + 0x14 (PIN_INPUT_PULLDOWN | MUX_MODE0) /* gpmc_ad5.gpmc_ad5 */ + 0x18 (PIN_INPUT_PULLDOWN | MUX_MODE0) /* gpmc_ad6.gpmc_ad6 */ + 0x1c (PIN_INPUT_PULLDOWN | 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 */ + >; + }; }; matrix_keypad: matrix_keypad@0 { @@ -184,3 +205,89 @@ &gpio3 { status = "okay"; }; + +&elm { + status = "okay"; +}; + +&gpmc { + status = "okay"; + pinctrl-names = "default"; + pinctrl-0 = <&nand_flash_x8>; + ranges = <0 0 0x08000000 0x10000000>; /* CS0: NAND */ + nand@0,0 { + reg = <0 0 0>; /* CS0, offset 0 */ + 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>; /* tCEA + tCHZ + 1 */ + gpmc,cs-wr-off-ns = <40>; + gpmc,adv-on-ns = <0>; /* cs-on-ns */ + gpmc,adv-rd-off-ns = <25>; /* min( tALH + tALS + 1) */ + gpmc,adv-wr-off-ns = <25>; /* min( tALH + tALS + 1) */ + gpmc,we-on-ns = <0>; /* cs-on-ns */ + gpmc,we-off-ns = <20>; /* we-on-time + tWP + 2 */ + gpmc,oe-on-ns = <3>; /* cs-on-ns + tRR + 2 */ + gpmc,oe-off-ns = <30>; /* oe-on-ns + tRP + 2 */ + gpmc,access-ns = <30>; /* tCEA + 4*/ + gpmc,rd-cycle-ns = <40>; + gpmc,wr-cycle-ns = <40>; + gpmc,wait-on-read = "true"; + gpmc,wait-on-write = "true"; + 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 = <0x00800000 0x1F600000>; + }; + }; +}; -- 2.20.1