1* SPI NOR flash: ST M25Pxx (and similar) serial flash chips
2
3Required properties:
4- #address-cells, #size-cells : Must be present if the device has sub-nodes
5  representing partitions.
6- compatible : May include a device-specific string consisting of the
7               manufacturer and name of the chip. A list of supported chip
8               names follows.
9               Must also include "jedec,spi-nor" for any SPI NOR flash that can
10               be identified by the JEDEC READ ID opcode (0x9F).
11
12               Supported chip names:
13                 at25df321a
14                 at25df641
15                 at26df081a
16                 mr25h128
17                 mr25h256
18                 mr25h10
19                 mr25h40
20                 mx25l4005a
21                 mx25l1606e
22                 mx25l6405d
23                 mx25l12805d
24                 mx25l25635e
25                 n25q064
26                 n25q128a11
27                 n25q128a13
28                 n25q512a
29                 s25fl256s1
30                 s25fl512s
31                 s25sl12801
32                 s25fl008k
33                 s25fl064k
34                 sst25vf040b
35                 m25p40
36                 m25p80
37                 m25p16
38                 m25p32
39                 m25p64
40                 m25p128
41                 w25x80
42                 w25x32
43                 w25q32
44                 w25q64
45                 w25q32dw
46                 w25q80bl
47                 w25q128
48                 w25q256
49
50               The following chip names have been used historically to
51               designate quirky versions of flash chips that do not support the
52               JEDEC READ ID opcode (0x9F):
53                 m25p05-nonjedec
54                 m25p10-nonjedec
55                 m25p20-nonjedec
56                 m25p40-nonjedec
57                 m25p80-nonjedec
58                 m25p16-nonjedec
59                 m25p32-nonjedec
60                 m25p64-nonjedec
61                 m25p128-nonjedec
62
63- reg : Chip-Select number
64- spi-max-frequency : Maximum frequency of the SPI bus the chip can operate at
65
66Optional properties:
67- m25p,fast-read : Use the "fast read" opcode to read data from the chip instead
68                   of the usual "read" opcode. This opcode is not supported by
69                   all chips and support for it can not be detected at runtime.
70                   Refer to your chips' datasheet to check if this is supported
71                   by your chip.
72- broken-flash-reset : Some flash devices utilize stateful addressing modes
73		   (e.g., for 32-bit addressing) which need to be managed
74		   carefully by a system. Because these sorts of flash don't
75		   have a standardized software reset command, and because some
76		   systems don't toggle the flash RESET# pin upon system reset
77		   (if the pin even exists at all), there are systems which
78		   cannot reboot properly if the flash is left in the "wrong"
79		   state. This boolean flag can be used on such systems, to
80		   denote the absence of a reliable reset mechanism.
81
82Example:
83
84	flash: m25p80@0 {
85		#address-cells = <1>;
86		#size-cells = <1>;
87		compatible = "spansion,m25p80", "jedec,spi-nor";
88		reg = <0>;
89		spi-max-frequency = <40000000>;
90		m25p,fast-read;
91	};
92