iio: adc: ti-ads1015: fix comparator polarity setting

The comparator polarity field in config register is not correctly
initialized as per the interrupt trigger setting.  Because the bitfield
definision is wrong and bit shifting is missed.

Fixes: d9f39babd8ba ("iio: adc: ti-ads1015: add threshold event support")
Cc: Daniel Baluta <daniel.baluta@gmail.com>
Cc: Jonathan Cameron <jic23@kernel.org>
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

diff --git a/drivers/iio/adc/ti-ads1015.c b/drivers/iio/adc/ti-ads1015.c
index d121002..e0dc204 100644 (file)
--- a/drivers/iio/adc/ti-ads1015.c
+++ b/drivers/iio/adc/ti-ads1015.c
@@ -52,7 +52,7 @@
 
 #define ADS1015_CFG_COMP_QUE_MASK      GENMASK(1, 0)
 #define ADS1015_CFG_COMP_LAT_MASK      BIT(2)
-#define ADS1015_CFG_COMP_POL_MASK      BIT(2)
+#define ADS1015_CFG_COMP_POL_MASK      BIT(3)
 #define ADS1015_CFG_COMP_MODE_MASK     BIT(4)
 #define ADS1015_CFG_DR_MASK    GENMASK(7, 5)
 #define ADS1015_CFG_MOD_MASK   BIT(8)
@@ -1017,10 +1017,12 @@ static int ads1015_probe(struct i2c_client *client,
 
                switch (irq_trig) {
                case IRQF_TRIGGER_LOW:
-                       cfg_comp |= ADS1015_CFG_COMP_POL_LOW;
+                       cfg_comp |= ADS1015_CFG_COMP_POL_LOW <<
+                                       ADS1015_CFG_COMP_POL_SHIFT;
                        break;
                case IRQF_TRIGGER_HIGH:
-                       cfg_comp |= ADS1015_CFG_COMP_POL_HIGH;
+                       cfg_comp |= ADS1015_CFG_COMP_POL_HIGH <<
+                                       ADS1015_CFG_COMP_POL_SHIFT;
                        break;
                default:
                        return -EINVAL;