[PATCH v2 08/11] iio: adc: at91_adc: remove forward declaration

[Alexandre Belloni <alexandre.belloni@bootlin.com>]

Remove the forward declaration of at91_adc_dt_ids by using
of_device_get_match_data. Also add const were possible since it is not
discarded by the cast anymore.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Reviewed-by: Ludovic Desroches <ludovic.desroches@microchip.com>
---
Changes in v2:
 - use of_device_get_match_data instead of device_get_match_data

 drivers/iio/adc/at91_adc.c | 11 ++++-------
 1 file changed, 4 insertions(+), 7 deletions(-)

diff --git a/drivers/iio/adc/at91_adc.c b/drivers/iio/adc/at91_adc.c
index 347464844263..4c1b3b67445d 100644
--- a/drivers/iio/adc/at91_adc.c
+++ b/drivers/iio/adc/at91_adc.c
@@ -224,7 +224,6 @@ struct at91_adc_state {
 	struct mutex		lock;
 	u8			num_channels;
 	void __iomem		*reg_base;
-	struct at91_adc_reg_desc *registers;
 	u32			startup_time;
 	u8			sample_hold_time;
 	bool			sleep_mode;
@@ -233,7 +232,8 @@ struct at91_adc_state {
 	u32			vref_mv;
 	u32			res;		/* resolution used for convertions */
 	wait_queue_head_t	wq_data_avail;
-	struct at91_adc_caps	*caps;
+	const struct at91_adc_caps *caps;
+	const struct at91_adc_reg_desc *registers;
 
 	/*
 	 * Following ADC channels are shared by touchscreen:
@@ -569,7 +569,7 @@ static int at91_adc_configure_trigger(struct iio_trigger *trig, bool state)
 {
 	struct iio_dev *idev = iio_trigger_get_drvdata(trig);
 	struct at91_adc_state *st = iio_priv(idev);
-	struct at91_adc_reg_desc *reg = st->registers;
+	const struct at91_adc_reg_desc *reg = st->registers;
 	u32 status = at91_adc_readl(st, reg->trigger_register);
 	int value;
 	u8 bit;
@@ -796,8 +796,6 @@ static u32 calc_startup_ticks_9x5(u32 startup_time, u32 adc_clk_khz)
 	return ticks;
 }
 
-static const struct of_device_id at91_adc_dt_ids[];
-
 static int at91_adc_probe_dt_ts(struct device_node *node,
 	struct at91_adc_state *st, struct device *dev)
 {
@@ -1011,8 +1009,7 @@ static int at91_adc_probe(struct platform_device *pdev)
 
 	st = iio_priv(idev);
 
-	st->caps = (struct at91_adc_caps *)
-		of_match_device(at91_adc_dt_ids, &pdev->dev)->data;
+	st->caps = of_device_get_match_data(&pdev->dev);
 
 	st->use_external = of_property_read_bool(node, "atmel,adc-use-external-triggers");
 
-- 
2.28.0