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>
diff --git a/Documentation/hwmon/lm70 b/Documentation/hwmon/lm70
index 0d24029..1bb1f20 100644
--- a/Documentation/hwmon/lm70
+++ b/Documentation/hwmon/lm70
@@ -31,9 +31,8 @@
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
---------
diff --git a/drivers/hwmon/lm70.c b/drivers/hwmon/lm70.c
index dd7f0ca..1da62f6 100644
--- a/drivers/hwmon/lm70.c
+++ b/drivers/hwmon/lm70.c
@@ -143,10 +143,6 @@
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);
