iio: sx9360: fix iio event generation

To convert SX9360 status register ["REG_STAT"], into a channel
index, we need to right shift by |stat_offset|, not left shift.
Also the PROXSTAT bit (3) is for channel 1 (PHM, Phase Measured), not (PHR,
Phase Reference, channel 0), so the offset is 2 instead of 3.

Fixes: 1cdb4c47 ("iio:proximity:sx9360: Add sx9360 support")
Signed-off-by: Jongpil Jung <jongpil19.jung@samsung.com>
Signed-off-by: Gwendal Grignou <gwendal@chromium.org>
Link: https://lore.kernel.org/r/20220122213444.745152-1-gwendal@chromium.orgSigned-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

drivers/iio/proximity/sx9360.c

@@ -775,7 +775,7 @@ static const struct sx_common_chip_info sx9360_chip_info = {
 	.reg_reset = SX9360_REG_RESET,
 
 	.mask_enable_chan = SX9360_REG_GNRL_CTRL0_PHEN_MASK,
-	.stat_offset = 3,
+	.stat_offset = 2,
 	.num_channels = SX9360_NUM_CHANNELS,
 	.num_default_regs = ARRAY_SIZE(sx9360_default_regs),
 

drivers/iio/proximity/sx_common.c

@@ -87,7 +87,7 @@ static void sx_common_push_events(struct iio_dev *indio_dev)
 		return;
 	}
 
-	val <<= data->chip_info->stat_offset;
+	val >>= data->chip_info->stat_offset;
 
 	/*
 	 * Only iterate over channels with changes on proximity status that have