1ST Microelectronics Flexible Static Memory Controller (FSMC) 2NAND Interface 3 4Required properties: 5- compatible : "st,spear600-fsmc-nand", "stericsson,fsmc-nand" 6- reg : Address range of the mtd chip 7- reg-names: Should contain the reg names "fsmc_regs", "nand_data", "nand_addr" and "nand_cmd" 8 9Optional properties: 10- bank-width : Width (in bytes) of the device. If not present, the width 11 defaults to 1 byte 12- nand-skip-bbtscan: Indicates the BBT scanning should be skipped 13- timings: array of 6 bytes for NAND timings. The meanings of these bytes 14 are: 15 byte 0 TCLR : CLE to RE delay in number of AHB clock cycles, only 4 bits 16 are valid. Zero means one clockcycle, 15 means 16 clock 17 cycles. 18 byte 1 TAR : ALE to RE delay, 4 bits are valid. Same format as TCLR. 19 byte 2 THIZ : number of HCLK clock cycles during which the data bus is 20 kept in Hi-Z (tristate) after the start of a write access. 21 Only valid for write transactions. Zero means zero cycles, 22 255 means 255 cycles. 23 byte 3 THOLD : number of HCLK clock cycles to hold the address (and data 24 when writing) after the command deassertation. Zero means 25 one cycle, 255 means 256 cycles. 26 byte 4 TWAIT : number of HCLK clock cycles to assert the command to the 27 NAND flash in response to SMWAITn. Zero means 1 cycle, 28 255 means 256 cycles. 29 byte 5 TSET : number of HCLK clock cycles to assert the address before the 30 command is asserted. Zero means one cycle, 255 means 256 31 cycles. 32- bank: default NAND bank to use (0-3 are valid, 0 is the default). 33- nand-ecc-mode : see nand-controller.yaml 34- nand-ecc-strength : see nand-controller.yaml 35- nand-ecc-step-size : see nand-controller.yaml 36 37Can support 1-bit HW ECC (default) or if stronger correction is required, 38software-based BCH. 39 40Example: 41 42 fsmc: flash@d1800000 { 43 compatible = "st,spear600-fsmc-nand"; 44 #address-cells = <1>; 45 #size-cells = <1>; 46 reg = <0xd1800000 0x1000 /* FSMC Register */ 47 0xd2000000 0x0010 /* NAND Base DATA */ 48 0xd2020000 0x0010 /* NAND Base ADDR */ 49 0xd2010000 0x0010>; /* NAND Base CMD */ 50 reg-names = "fsmc_regs", "nand_data", "nand_addr", "nand_cmd"; 51 52 bank-width = <1>; 53 nand-skip-bbtscan; 54 timings = /bits/ 8 <0 0 0 2 3 0>; 55 bank = <1>; 56 57 partition@0 { 58 ... 59 }; 60 }; 61