hwmon: add support for THMC50 and ADM1022

[firefly-linux-kernel-4.4.55.git] / drivers / hwmon / lm70.c

diff --git a/drivers/hwmon/lm70.c b/drivers/hwmon/lm70.c
index 7eaae3834e157279e926281fd1ec2270c7666f12..275d392eca6116d62461db1f16b6468655af3c2e 100644 (file)
--- a/drivers/hwmon/lm70.c
+++ b/drivers/hwmon/lm70.c
@@ -96,6 +96,10 @@ static int __devinit lm70_probe(struct spi_device *spi)
        struct lm70 *p_lm70;
        int status;
 
+       /* signaling is SPI_MODE_0 on a 3-wire link (shared SI/SO) */
+       if ((spi->mode & (SPI_CPOL|SPI_CPHA)) || !(spi->mode & SPI_3WIRE))
+               return -EINVAL;
+
        p_lm70 = kzalloc(sizeof *p_lm70, GFP_KERNEL);
        if (!p_lm70)
                return -ENOMEM;