Based on kernel version 2.6.37. Page generated on 2011-03-22 21:57 EST.
1 Freescale Localbus UPM programmed to work with NAND flash 2 3 Required properties: 4 - compatible : "fsl,upm-nand". 5 - reg : should specify localbus chip select and size used for the chip. 6 - fsl,upm-addr-offset : UPM pattern offset for the address latch. 7 - fsl,upm-cmd-offset : UPM pattern offset for the command latch. 8 9 Optional properties: 10 - fsl,upm-wait-flags : add chip-dependent short delays after running the 11 UPM pattern (0x1), after writing a data byte (0x2) or after 12 writing out a buffer (0x4). 13 - fsl,upm-addr-line-cs-offsets : address offsets for multi-chip support. 14 The corresponding address lines are used to select the chip. 15 - gpios : may specify optional GPIOs connected to the Ready-Not-Busy pins 16 (R/B#). For multi-chip devices, "n" GPIO definitions are required 17 according to the number of chips. 18 - chip-delay : chip dependent delay for transfering data from array to 19 read registers (tR). Required if property "gpios" is not used 20 (R/B# pins not connected). 21 22 Examples: 23 24 upm@1,0 { 25 compatible = "fsl,upm-nand"; 26 reg = <1 0 1>; 27 fsl,upm-addr-offset = <16>; 28 fsl,upm-cmd-offset = <8>; 29 gpios = <&qe_pio_e 18 0>; 30 31 flash { 32 #address-cells = <1>; 33 #size-cells = <1>; 34 compatible = "..."; 35 36 partition@0 { 37 ... 38 }; 39 }; 40 }; 41 42 upm@3,0 { 43 #address-cells = <0>; 44 #size-cells = <0>; 45 compatible = "tqc,tqm8548-upm-nand", "fsl,upm-nand"; 46 reg = <3 0x0 0x800>; 47 fsl,upm-addr-offset = <0x10>; 48 fsl,upm-cmd-offset = <0x08>; 49 /* Multi-chip NAND device */ 50 fsl,upm-addr-line-cs-offsets = <0x0 0x200>; 51 fsl,upm-wait-flags = <0x5>; 52 chip-delay = <25>; // in micro-seconds 53 54 nand@0 { 55 #address-cells = <1>; 56 #size-cells = <1>; 57 58 partition@0 { 59 label = "fs"; 60 reg = <0x00000000 0x10000000>; 61 }; 62 }; 63 };