iio: adc: ti-ads1015: Switch to static const writeable ranges table

Switch the driver from code implementing test whether a regmap register
is writeable to static const tables describing the test. No functional
change.
Signed-off-by: Marek Vasut <marex@denx.de>
Reviewed-by: Andy Shevchenko <andy@kernel.org>
Cc: Daniel Baluta <daniel.baluta@nxp.com>
Link: https://lore.kernel.org/r/20220328194725.149150-3-marex@denx.deSigned-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

drivers/iio/adc/ti-ads1015.c

@@ -273,23 +273,20 @@ static void ads1015_event_channel_disable(struct ads1015_data *data, int chan)
 	data->event_channel = ADS1015_CHANNELS;
 }
 
-static bool ads1015_is_writeable_reg(struct device *dev, unsigned int reg)
-{
-	switch (reg) {
-	case ADS1015_CFG_REG:
-	case ADS1015_LO_THRESH_REG:
-	case ADS1015_HI_THRESH_REG:
-		return true;
-	default:
-		return false;
-	}
-}
+static const struct regmap_range ads1015_writeable_ranges[] = {
+	regmap_reg_range(ADS1015_CFG_REG, ADS1015_HI_THRESH_REG),
+};
+
+static const struct regmap_access_table ads1015_writeable_table = {
+	.yes_ranges = ads1015_writeable_ranges,
+	.n_yes_ranges = ARRAY_SIZE(ads1015_writeable_ranges),
+};
 
 static const struct regmap_config ads1015_regmap_config = {
 	.reg_bits = 8,
 	.val_bits = 16,
 	.max_register = ADS1015_HI_THRESH_REG,
-	.writeable_reg = ads1015_is_writeable_reg,
+	.wr_table = &ads1015_writeable_table,
 };
 
 static const struct iio_chan_spec ads1015_channels[] = {