Blame - Documentation/hwmon/lm75 - kernel/msm-4.9

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R.Marek@sh.cvut.cz	7f15b66	2005-05-26 12:42:19 +0000	[diff] [blame]	1	Kernel driver lm75
				2	==================
				3
				4	Supported chips:
				5	* National Semiconductor LM75
				6	Prefix: 'lm75'
				7	Addresses scanned: I2C 0x48 - 0x4f
				8	Datasheet: Publicly available at the National Semiconductor website
				9	http://www.national.com/
Len Sorensen	05e82fe	2011-03-21 17:59:36 +0100	[diff] [blame]	10	* National Semiconductor LM75A
				11	Prefix: 'lm75a'
				12	Addresses scanned: I2C 0x48 - 0x4f
				13	Datasheet: Publicly available at the National Semiconductor website
				14	http://www.national.com/
Jean Delvare	426343e	2011-10-13 17:15:11 -0400	[diff] [blame]	15	* Dallas Semiconductor DS75, DS1775
				16	Prefixes: 'ds75', 'ds1775'
				17	Addresses scanned: none
R.Marek@sh.cvut.cz	7f15b66	2005-05-26 12:42:19 +0000	[diff] [blame]	18	Datasheet: Publicly available at the Dallas Semiconductor website
				19	http://www.maxim-ic.com/
				20	* Maxim MAX6625, MAX6626
Jean Delvare	426343e	2011-10-13 17:15:11 -0400	[diff] [blame]	21	Prefixes: 'max6625', 'max6626'
				22	Addresses scanned: none
R.Marek@sh.cvut.cz	7f15b66	2005-05-26 12:42:19 +0000	[diff] [blame]	23	Datasheet: Publicly available at the Maxim website
				24	http://www.maxim-ic.com/
				25	* Microchip (TelCom) TCN75
				26	Prefix: 'lm75'
Jean Delvare	426343e	2011-10-13 17:15:11 -0400	[diff] [blame]	27	Addresses scanned: none
				28	Datasheet: Publicly available at the Microchip website
				29	http://www.microchip.com/
				30	* Microchip MCP9800, MCP9801, MCP9802, MCP9803
				31	Prefix: 'mcp980x'
				32	Addresses scanned: none
R.Marek@sh.cvut.cz	7f15b66	2005-05-26 12:42:19 +0000	[diff] [blame]	33	Datasheet: Publicly available at the Microchip website
				34	http://www.microchip.com/
Michael Hennerich	e96f9d8	2011-10-13 04:43:31 -0400	[diff] [blame]	35	* Analog Devices ADT75
				36	Prefix: 'adt75'
Jean Delvare	426343e	2011-10-13 17:15:11 -0400	[diff] [blame]	37	Addresses scanned: none
Michael Hennerich	e96f9d8	2011-10-13 04:43:31 -0400	[diff] [blame]	38	Datasheet: Publicly available at the Analog Devices website
				39	http://www.analog.com/adt75
Jean Delvare	426343e	2011-10-13 17:15:11 -0400	[diff] [blame]	40	* ST Microelectronics STDS75
				41	Prefix: 'stds75'
				42	Addresses scanned: none
				43	Datasheet: Publicly available at the ST website
				44	http://www.st.com/internet/analog/product/121769.jsp
				45	* Texas Instruments TMP100, TMP101, TMP105, TMP75, TMP175, TMP275
				46	Prefixes: 'tmp100', 'tmp101', 'tmp105', 'tmp175', 'tmp75', 'tmp275'
				47	Addresses scanned: none
				48	Datasheet: Publicly available at the Texas Instruments website
				49	http://www.ti.com/product/tmp100
				50	http://www.ti.com/product/tmp101
				51	http://www.ti.com/product/tmp105
				52	http://www.ti.com/product/tmp75
				53	http://www.ti.com/product/tmp175
				54	http://www.ti.com/product/tmp275
R.Marek@sh.cvut.cz	7f15b66	2005-05-26 12:42:19 +0000	[diff] [blame]	55
				56	Author: Frodo Looijaard <frodol@dds.nl>
				57
				58	Description
				59	-----------
				60
				61	The LM75 implements one temperature sensor. Limits can be set through the
				62	Overtemperature Shutdown register and Hysteresis register. Each value can be
				63	set and read to half-degree accuracy.
				64	An alarm is issued (usually to a connected LM78) when the temperature
				65	gets higher then the Overtemperature Shutdown value; it stays on until
				66	the temperature falls below the Hysteresis value.
				67	All temperatures are in degrees Celsius, and are guaranteed within a
				68	range of -55 to +125 degrees.
				69
				70	The LM75 only updates its values each 1.5 seconds; reading it more often
				71	will do no harm, but will return 'old' values.
				72
Jean Delvare	426343e	2011-10-13 17:15:11 -0400	[diff] [blame]	73	The original LM75 was typically used in combination with LM78-like chips
				74	on PC motherboards, to measure the temperature of the processor(s). Clones
				75	are now used in various embedded designs.
R.Marek@sh.cvut.cz	7f15b66	2005-05-26 12:42:19 +0000	[diff] [blame]	76
				77	The LM75 is essentially an industry standard; there may be other
				78	LM75 clones not listed here, with or without various enhancements,
Jean Delvare	426343e	2011-10-13 17:15:11 -0400	[diff] [blame]	79	that are supported. The clones are not detected by the driver, unless
				80	they reproduce the exact register tricks of the original LM75, and must
				81	therefore be instantiated explicitly. The specific enhancements (such as
				82	higher resolution) are not currently supported by the driver.
R.Marek@sh.cvut.cz	7f15b66	2005-05-26 12:42:19 +0000	[diff] [blame]	83
				84	The LM77 is not supported, contrary to what we pretended for a long time.
				85	Both chips are simply not compatible, value encoding differs.