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.comSigned-off-by: Stefan Schmidt <stefan@datenfreihafen.org>

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)
 {
@@ -1548,19 +1522,24 @@ 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");
@@ -1568,6 +1547,7 @@ static int at86rf230_probe(struct spi_device *spi)
 			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");

include/linux/spi/at86rf230.h

-/* SPDX-License-Identifier: GPL-2.0-only */
-/*
- * AT86RF230/RF231 driver
- *
- * Copyright (C) 2009-2012 Siemens AG
- *
- * Written by:
- * Dmitry Eremin-Solenikov <dmitry.baryshkov@siemens.com>
- */
-#ifndef AT86RF230_H
-#define AT86RF230_H
-
-struct at86rf230_platform_data {
-	int rstn;
-	int slp_tr;
-	int dig2;
-	u8 xtal_trim;
-};
-
-#endif