[PATCH v5 3/3] iio: adc: tsc2046: silent spi_device_id warning

[Oleksij Rempel <o.rempel@pengutronix.de>]

Add spi_device_id to silent following kernel runtime warning:
"SPI driver tsc2046 has no spi_device_id for ti,tsc2046e-adc".

Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
---
changes v4:
- add Reviewed-by: Andy Shevchenko
changes v3:
- add missing point
- remove unneeded blank line
- assignment id at the definition line
changes v2:
- attach actual driver_data
- use spi_get_device_id fallback
---
 drivers/iio/adc/ti-tsc2046.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/drivers/iio/adc/ti-tsc2046.c b/drivers/iio/adc/ti-tsc2046.c
index c7601b29b3bef..c023163f71464 100644
--- a/drivers/iio/adc/ti-tsc2046.c
+++ b/drivers/iio/adc/ti-tsc2046.c
@@ -805,6 +805,11 @@ static int tsc2046_adc_probe(struct spi_device *spi)
 	}
 
 	dcfg = device_get_match_data(dev);
+	if (!dcfg) {
+		const struct spi_device_id *id = spi_get_device_id(spi);
+
+		dcfg = (const struct tsc2046_adc_dcfg *)id->driver_data;
+	}
 	if (!dcfg)
 		return -EINVAL;
 
@@ -886,11 +891,18 @@ static const struct of_device_id ads7950_of_table[] = {
 };
 MODULE_DEVICE_TABLE(of, ads7950_of_table);
 
+static const struct spi_device_id tsc2046_adc_spi_ids[] = {
+	{ "tsc2046e-adc", (unsigned long)&tsc2046_adc_dcfg_tsc2046e },
+	{ }
+};
+MODULE_DEVICE_TABLE(spi, tsc2046_adc_spi_ids);
+
 static struct spi_driver tsc2046_adc_driver = {
 	.driver = {
 		.name = "tsc2046",
 		.of_match_table = ads7950_of_table,
 	},
+	.id_table = tsc2046_adc_spi_ids,
 	.probe = tsc2046_adc_probe,
 };
 module_spi_driver(tsc2046_adc_driver);
-- 
2.30.2