iio: Fixpoint formatted output bugfix

Fix some ADC drivers' _scale interface to correct fixpoint formatted output

Signed-off-by: Roland Stigge <[e-mail]>
Acked-by: Jonathan Cameron <[e-mail]>
Acked-by: Michael Hennerich <[e-mail]>
Cc: stable <[e-mail]>
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/staging/iio/adc/ad7476_core.c

···
 	/* Corresponds to Vref / 2^(bits) */
 	unsigned int scale_uv = (st->int_vref_mv * 1000) >> st->chip_info->bits;
 
-	return sprintf(buf, "%d.%d\n", scale_uv / 1000, scale_uv % 1000);
+	return sprintf(buf, "%d.%03d\n", scale_uv / 1000, scale_uv % 1000);
 }
 static IIO_DEVICE_ATTR(in_scale, S_IRUGO, ad7476_show_scale, NULL, 0);
 

drivers/staging/iio/adc/ad799x_core.c

···
 	/* Corresponds to Vref / 2^(bits) */
 	unsigned int scale_uv = (st->int_vref_mv * 1000) >> st->chip_info->bits;
 
-	return sprintf(buf, "%d.%d\n", scale_uv / 1000, scale_uv % 1000);
+	return sprintf(buf, "%d.%03d\n", scale_uv / 1000, scale_uv % 1000);
 }
 
 static IIO_DEVICE_ATTR(in_scale, S_IRUGO, ad799x_show_scale, NULL, 0);