ieee802154: at86rf230: drop support for platform data

There are no users of platform data in the mainline tree, and new
boards should use either ACPI or device tree, so let's stop supporting
it. This will help with converting the driver to gpiod API.

Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Link: https://lore.kernel.org/r/20230201053447.4098486-1-dmitry.torokhov@gmail.com
Signed-off-by: Stefan Schmidt <stefan@datenfreihafen.org>

Author: dtor

drivers/net/ieee802154/at86rf230.c

@@ -17,8 +17,8 @@
 #include <linux/irq.h>
 #include <linux/gpio.h>
 #include <linux/delay.h>
+#include <linux/property.h>
 #include <linux/spi/spi.h>
-#include <linux/spi/at86rf230.h>
 #include <linux/regmap.h>
 #include <linux/skbuff.h>
 #include <linux/of_gpio.h>
@@ -1415,32 +1415,6 @@ static int at86rf230_hw_init(struct at86rf230_local *lp, u8 xtal_trim)
 	return at86rf230_write_subreg(lp, SR_SLOTTED_OPERATION, 0);
 }
 
-static int
-at86rf230_get_pdata(struct spi_device *spi, int *rstn, int *slp_tr,
-		    u8 *xtal_trim)
-{
-	struct at86rf230_platform_data *pdata = spi->dev.platform_data;
-	int ret;
-
-	if (!IS_ENABLED(CONFIG_OF) || !spi->dev.of_node) {
-		if (!pdata)
-			return -ENOENT;
-
-		*rstn = pdata->rstn;
-		*slp_tr = pdata->slp_tr;
-		*xtal_trim = pdata->xtal_trim;
-		return 0;
-	}
-
-	*rstn = of_get_named_gpio(spi->dev.of_node, "reset-gpio", 0);
-	*slp_tr = of_get_named_gpio(spi->dev.of_node, "sleep-gpio", 0);
-	ret = of_property_read_u8(spi->dev.of_node, "xtal-trim", xtal_trim);
-	if (ret < 0 && ret != -EINVAL)
-		return ret;
-
-	return 0;
-}
-
 static int
 at86rf230_detect_device(struct at86rf230_local *lp)
 {
@@ -1548,26 +1522,32 @@ static int at86rf230_probe(struct spi_device *spi)
 	struct at86rf230_local *lp;
 	unsigned int status;
 	int rc, irq_type, rstn, slp_tr;
-	u8 xtal_trim = 0;
+	u8 xtal_trim;
 
 	if (!spi->irq) {
 		dev_err(&spi->dev, "no IRQ specified\n");
 		return -EINVAL;
 	}
 
-	rc = at86rf230_get_pdata(spi, &rstn, &slp_tr, &xtal_trim);
+	rc = device_property_read_u8(&spi->dev, "xtal-trim", &xtal_trim);
 	if (rc < 0) {
-		dev_err(&spi->dev, "failed to parse platform_data: %d\n", rc);
-		return rc;
+		if (rc != -EINVAL) {
+			dev_err(&spi->dev,
+				"failed to parse xtal-trim: %d\n", rc);
+			return rc;
+		}
+		xtal_trim = 0;
 	}
 
+	rstn = of_get_named_gpio(spi->dev.of_node, "reset-gpio", 0);
 	if (gpio_is_valid(rstn)) {
 		rc = devm_gpio_request_one(&spi->dev, rstn,
 					   GPIOF_OUT_INIT_HIGH, "rstn");
 		if (rc)
 			return rc;
 	}
 
+	slp_tr = of_get_named_gpio(spi->dev.of_node, "sleep-gpio", 0);
 	if (gpio_is_valid(slp_tr)) {
 		rc = devm_gpio_request_one(&spi->dev, slp_tr,
 					   GPIOF_OUT_INIT_LOW, "slp_tr");