iio: adc: nxp-sar-adc: Remove unnecessary type casting

The readl_poll_timeout() macro returns a signed integer error code.

In nxp_sar_adc_calibration_wait(), the return value is casted to u32
before being returned as int, which is unnecessary.

Signed-off-by: Felix Gu <ustc.gu@gmail.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

diff --git a/drivers/iio/adc/nxp-sar-adc.c b/drivers/iio/adc/nxp-sar-adc.c
index 9efa883c277d23583523059cd983e509a4dbb241..a6e4888a846447ab38e2d937c6aebb14621008cd 100644 (file)
--- a/drivers/iio/adc/nxp-sar-adc.c
+++ b/drivers/iio/adc/nxp-sar-adc.c
@@ -247,7 +247,8 @@ static inline void nxp_sar_adc_calibration_start(void __iomem *base)
 
 static inline int nxp_sar_adc_calibration_wait(void __iomem *base)
 {
-       u32 msr, ret;
+       u32 msr;
+       int ret;
 
        ret = readl_poll_timeout(NXP_SAR_ADC_MSR(base), msr,
                                 !FIELD_GET(NXP_SAR_ADC_MSR_CALBUSY, msr),