[PATCH 6/9] iio: adc: at91_adc: remove forward declaration

[Alexandre Belloni]

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

Signed-off-by: Alexandre Belloni <alexandre.bell...@bootlin.com>
---
 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 9f05eb722f5e..76aeebce6f4d 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 = device_get_match_data(&pdev->dev);
 
        st->use_external = of_property_read_bool(node, 
"atmel,adc-use-external-triggers");
 
-- 
2.28.0