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-addr-line-cs-offsets : address offsets for multi-chip support.
11 The corresponding address lines are used to select the chip.
12 - gpios : may specify optional GPIOs connected to the Ready-Not-Busy pins
13 (R/B#). For multi-chip devices, "n" GPIO definitions are required
14 according to the number of chips.
15
16 Deprecated properties:
17 - fsl,upm-wait-flags : add chip-dependent short delays after running the
18 UPM pattern (0x1), after writing a data byte (0x2) or after
19 writing out a buffer (0x4).
20 - chip-delay : chip dependent delay for transferring data from array to
21 read registers (tR). Required if property "gpios" is not used
22 (R/B# pins not connected).
23
24 Each flash chip described may optionally contain additional sub-nodes
25 describing partitions of the address space. See mtd.yaml for more
26 detail.
27
28 Examples:
29
30 upm@1,0 {
31 compatible = "fsl,upm-nand";
32 reg = <1 0 1>;
33 fsl,upm-addr-offset = <16>;
34 fsl,upm-cmd-offset = <8>;
35 gpios = <&qe_pio_e 18 0>;
36
37 flash {
38 #address-cells = <1>;
39 #size-cells = <1>;
40 compatible = "...";
41
42 partition@0 {
43 ...
44 };
45 };
46 };
47
48 upm@3,0 {
49 #address-cells = <0>;
50 #size-cells = <0>;
51 compatible = "tqc,tqm8548-upm-nand", "fsl,upm-nand";
52 reg = <3 0x0 0x800>;
53 fsl,upm-addr-offset = <0x10>;
54 fsl,upm-cmd-offset = <0x08>;
55 /* Multi-chip NAND device */
56 fsl,upm-addr-line-cs-offsets = <0x0 0x200>;
57
58 nand@0 {
59 #address-cells = <1>;
60 #size-cells = <1>;
61
62 partition@0 {
63 label = "fs";
64 reg = <0x00000000 0x10000000>;
65 };
66 };
67 };
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