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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: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
This commit is contained in:
Christophe Leroy 2012-09-04 10:40:44 +02:00 committed by Guenter Roeck
parent edec5af7c5
commit 146ab288bb
2 changed files with 2 additions and 7 deletions
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5
Documentation/hwmon/lm70
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@ -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
---------

4
drivers/hwmon/lm70.c
View File

@ -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);