About Kernel Documentation Linux Kernel Contact Linux Resources Linux Blog

Documentation / devicetree / bindings / mtd / fsmc-nand.txt




Custom Search

Based on kernel version 3.13. Page generated on 2014-01-20 22:01 EST.

1	ST Microelectronics Flexible Static Memory Controller (FSMC)
2	NAND Interface
3	
4	Required 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	
9	Optional 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 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	
34	Example:
35	
36		fsmc: flash@d1800000 {
37			compatible = "st,spear600-fsmc-nand";
38			#address-cells = <1>;
39			#size-cells = <1>;
40			reg = <0xd1800000 0x1000	/* FSMC Register */
41			       0xd2000000 0x0010	/* NAND Base DATA */
42			       0xd2020000 0x0010	/* NAND Base ADDR */
43			       0xd2010000 0x0010>;	/* NAND Base CMD */
44			reg-names = "fsmc_regs", "nand_data", "nand_addr", "nand_cmd";
45	
46			bank-width = <1>;
47			nand-skip-bbtscan;
48			timings = /bits/ 8 <0 0 0 2 3 0>;
49			bank = <1>;
50	
51			partition@0 {
52				...
53			};
54		};
Hide Line Numbers
About Kernel Documentation Linux Kernel Contact Linux Resources Linux Blog

Information is copyright its respective author. All material is available from the Linux Kernel Source distributed under a GPL License. This page is provided as a free service by mjmwired.net.