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2024-10-09 244b2c5ca8b14627e4a17755e5922221e121c771 
 kernel/drivers/net/ieee802154/mcr20a.c
....@@ -1,17 +1,8 @@
1
+// SPDX-License-Identifier: GPL-2.0-only
12 /*
23  * Driver for NXP MCR20A 802.15.4 Wireless-PAN Networking controller
34  *
45  * Copyright (C) 2018 Xue Liu <liuxuenetmail@gmail.com>
5
- *
6
- * This program is free software; you can redistribute it and/or modify
7
- * it under the terms of the GNU General Public License version 2
8
- * as published by the Free Software Foundation.
9
- *
10
- * This program is distributed in the hope that it will be useful,
11
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
12
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13
- * GNU General Public License for more details.
14
- *
156  */
167 #include <linux/kernel.h>
178 #include <linux/module.h>
....@@ -132,11 +123,6 @@
132123 };
133124 
134125 #define MCR20A_VALID_CHANNELS (0x07FFF800)
135
-
136
-struct mcr20a_platform_data {
137
-	int rst_gpio;
138
-};
139
-
140126 #define MCR20A_MAX_BUF		(127)
141127 
142128 #define printdev(X) (&X->spi->dev)
....@@ -412,7 +398,6 @@
412398 	struct spi_device *spi;
413399 
414400 	struct ieee802154_hw *hw;
415
-	struct mcr20a_platform_data *pdata;
416401 	struct regmap *regmap_dar;
417402 	struct regmap *regmap_iar;
418403 
....@@ -815,7 +800,7 @@
815800 	if (!skb)
816801 		return;
817802 
818
-	memcpy(skb_put(skb, len), lp->rx_buf, len);
803
+	__skb_put_data(skb, lp->rx_buf, len);
819804 	ieee802154_rx_irqsafe(lp->hw, skb, lp->rx_lqi[0]);
820805 
821806 	print_hex_dump_debug("mcr20a rx: ", DUMP_PREFIX_OFFSET, 16, 1,
....@@ -917,9 +902,9 @@
917902 		}
918903 		break;
919904 	case (DAR_IRQSTS1_RXIRQ | DAR_IRQSTS1_SEQIRQ):
920
-			/* rx is starting */
921
-			dev_dbg(printdev(lp), "RX is starting\n");
922
-			mcr20a_handle_rx(lp);
905
+		/* rx is starting */
906
+		dev_dbg(printdev(lp), "RX is starting\n");
907
+		mcr20a_handle_rx(lp);
923908 		break;
924909 	case (DAR_IRQSTS1_RXIRQ | DAR_IRQSTS1_TXIRQ | DAR_IRQSTS1_SEQIRQ):
925910 		if (lp->is_tx) {
....@@ -980,20 +965,6 @@
980965 	}
981966 
982967 	return IRQ_HANDLED;
983
-}
984
-
985
-static int mcr20a_get_platform_data(struct spi_device *spi,
986
-				    struct mcr20a_platform_data *pdata)
987
-{
988
-	int ret = 0;
989
-
990
-	if (!spi->dev.of_node)
991
-		return -EINVAL;
992
-
993
-	pdata->rst_gpio = of_get_named_gpio(spi->dev.of_node, "rst_b-gpio", 0);
994
-	dev_dbg(&spi->dev, "rst_b-gpio: %d\n", pdata->rst_gpio);
995
-
996
-	return ret;
997968 }
998969 
999970 static void mcr20a_hw_setup(struct mcr20a_local *lp)
....@@ -1255,7 +1226,7 @@
12551226 {
12561227 	struct ieee802154_hw *hw;
12571228 	struct mcr20a_local *lp;
1258
-	struct mcr20a_platform_data *pdata;
1229
+	struct gpio_desc *rst_b;
12591230 	int irq_type;
12601231 	int ret = -ENOMEM;
12611232 
....@@ -1266,48 +1237,32 @@
12661237 		return -EINVAL;
12671238 	}
12681239 
1269
-	pdata = kmalloc(sizeof(*pdata), GFP_KERNEL);
1270
-	if (!pdata)
1271
-		return -ENOMEM;
1272
-
1273
-	/* set mcr20a platform data */
1274
-	ret = mcr20a_get_platform_data(spi, pdata);
1275
-	if (ret < 0) {
1276
-		dev_crit(&spi->dev, "mcr20a_get_platform_data failed.\n");
1277
-		goto free_pdata;
1278
-	}
1279
-
1280
-	/* init reset gpio */
1281
-	if (gpio_is_valid(pdata->rst_gpio)) {
1282
-		ret = devm_gpio_request_one(&spi->dev, pdata->rst_gpio,
1283
-					    GPIOF_OUT_INIT_HIGH, "reset");
1284
-		if (ret)
1285
-			goto free_pdata;
1240
+	rst_b = devm_gpiod_get(&spi->dev, "rst_b", GPIOD_OUT_HIGH);
1241
+	if (IS_ERR(rst_b)) {
1242
+		ret = PTR_ERR(rst_b);
1243
+		if (ret != -EPROBE_DEFER)
1244
+			dev_err(&spi->dev, "Failed to get 'rst_b' gpio: %d", ret);
1245
+		return ret;
12861246 	}
12871247 
12881248 	/* reset mcr20a */
1289
-	if (gpio_is_valid(pdata->rst_gpio)) {
1290
-		usleep_range(10, 20);
1291
-		gpio_set_value_cansleep(pdata->rst_gpio, 0);
1292
-		usleep_range(10, 20);
1293
-		gpio_set_value_cansleep(pdata->rst_gpio, 1);
1294
-		usleep_range(120, 240);
1295
-	}
1249
+	usleep_range(10, 20);
1250
+	gpiod_set_value_cansleep(rst_b, 1);
1251
+	usleep_range(10, 20);
1252
+	gpiod_set_value_cansleep(rst_b, 0);
1253
+	usleep_range(120, 240);
12961254 
12971255 	/* allocate ieee802154_hw and private data */
12981256 	hw = ieee802154_alloc_hw(sizeof(*lp), &mcr20a_hw_ops);
12991257 	if (!hw) {
13001258 		dev_crit(&spi->dev, "ieee802154_alloc_hw failed\n");
1301
-		ret = -ENOMEM;
1302
-		goto free_pdata;
1259
+		return ret;
13031260 	}
13041261 
13051262 	/* init mcr20a local data */
13061263 	lp = hw->priv;
13071264 	lp->hw = hw;
13081265 	lp->spi = spi;
1309
-	lp->spi->dev.platform_data = pdata;
1310
-	lp->pdata = pdata;
13111266 
13121267 	/* init ieee802154_hw */
13131268 	hw->parent = &spi->dev;
....@@ -1376,8 +1331,6 @@
13761331 
13771332 free_dev:
13781333 	ieee802154_free_hw(lp->hw);
1379
-free_pdata:
1380
-	kfree(pdata);
13811334 
13821335 	return ret;
13831336 }