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Commit 146ab288 authored by Christophe Leroy's avatar Christophe Leroy Committed by Guenter Roeck
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hwmon: (lm70) Allow 4wire SPI bus with LM70 



Removing the 3wire limitation on LM70 as the component also allows
operation on 4wire SPI bus

Signed-off-by: default avatarChristophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: default avatarGuenter Roeck <linux@roeck-us.net>
parent edec5af7

Documentation/hwmon/lm70

+2 −3
Original line number Diff line number Diff line
@@ -31,9 +31,8 @@ As a real (in-tree) example of this "SPI protocol driver" interfacing 
with a "SPI master controller driver", see drivers/spi/spi_lm70llp.c

and its associated documentation.



The TMP121/TMP123 are very similar; main differences are 4 wire SPI inter-

face (read only) and 13-bit temperature data (0.0625 degrees celsius reso-

lution).

The TMP121/TMP123 are very similar; main difference is 13-bit temperature

data (0.0625 degrees celsius resolution).



Thanks to

---------

drivers/hwmon/lm70.c

+0 −4
Original line number Diff line number Diff line
@@ -143,10 +143,6 @@ static int __devinit lm70_probe(struct spi_device *spi) 
	if (spi->mode & (SPI_CPOL | SPI_CPHA))

		return -EINVAL;



	/* 3-wire link (shared SI/SO) for LM70 */

	if (chip == LM70_CHIP_LM70 && !(spi->mode & SPI_3WIRE))

		return -EINVAL;



	/* NOTE:  we assume 8-bit words, and convert to 16 bits manually */



	p_lm70 = devm_kzalloc(&spi->dev, sizeof(*p_lm70), GFP_KERNEL);