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2024-05-13 9d77db3c730780c8ef5ccd4b66403ff5675cfe4e 
 kernel/drivers/iio/adc/at91_adc.c
....@@ -1,9 +1,8 @@
1
+// SPDX-License-Identifier: GPL-2.0-or-later
12 /*
23  * Driver for the ADC present in the Atmel AT91 evaluation boards.
34  *
45  * Copyright 2011 Free Electrons
5
- *
6
- * Licensed under the GPLv2 or later.
76  */
87 
98 #include <linux/bitmap.h>
....@@ -158,7 +157,7 @@
158157  * struct at91_adc_reg_desc - Various informations relative to registers
159158  * @channel_base:	Base offset for the channel data registers
160159  * @drdy_mask:		Mask of the DRDY field in the relevant registers
161
-			(Interruptions registers mostly)
160
+ *			(Interruptions registers mostly)
162161  * @status_register:	Offset of the Interrupt Status Register
163162  * @trigger_register:	Offset of the Trigger setup register
164163  * @mr_prescal_mask:	Mask of the PRESCAL field in the adc MR register
....@@ -288,13 +287,13 @@
288287 	}
289288 }
290289 
291
-static int at91_ts_sample(struct at91_adc_state *st)
290
+static int at91_ts_sample(struct iio_dev *idev)
292291 {
292
+	struct at91_adc_state *st = iio_priv(idev);
293293 	unsigned int xscale, yscale, reg, z1, z2;
294294 	unsigned int x, y, pres, xpos, ypos;
295295 	unsigned int rxp = 1;
296296 	unsigned int factor = 1000;
297
-	struct iio_dev *idev = iio_priv_to_dev(st);
298297 
299298 	unsigned int xyz_mask_bits = st->res;
300299 	unsigned int xyz_mask = (1 << xyz_mask_bits) - 1;
....@@ -450,7 +449,7 @@
450449 
451450 		if (status & AT91_ADC_ISR_PENS) {
452451 			/* validate data by pen contact */
453
-			at91_ts_sample(st);
452
+			at91_ts_sample(idev);
454453 		} else {
455454 			/* triggered by event that is no pen contact, just read
456455 			 * them to clean the interrupt and discard all.
....@@ -617,8 +616,10 @@
617616 	trig->ops = &at91_adc_trigger_ops;
618617 
619618 	ret = iio_trigger_register(trig);
620
-	if (ret)
619
+	if (ret) {
620
+		iio_trigger_free(trig);
621621 		return NULL;
622
+	}
622623 
623624 	return trig;
624625 }
....@@ -738,10 +739,10 @@
738739 	return -EINVAL;
739740 }
740741 
741
-static int at91_adc_of_get_resolution(struct at91_adc_state *st,
742
+static int at91_adc_of_get_resolution(struct iio_dev *idev,
742743 				      struct platform_device *pdev)
743744 {
744
-	struct iio_dev *idev = iio_priv_to_dev(st);
745
+	struct at91_adc_state *st = iio_priv(idev);
745746 	struct device_node *np = pdev->dev.of_node;
746747 	int count, i, ret = 0;
747748 	char *res_name, *s;
....@@ -867,10 +868,10 @@
867868 	}
868869 }
869870 
870
-static int at91_adc_probe_dt(struct at91_adc_state *st,
871
+static int at91_adc_probe_dt(struct iio_dev *idev,
871872 			     struct platform_device *pdev)
872873 {
873
-	struct iio_dev *idev = iio_priv_to_dev(st);
874
+	struct at91_adc_state *st = iio_priv(idev);
874875 	struct device_node *node = pdev->dev.of_node;
875876 	struct device_node *trig_node;
876877 	int i = 0, ret;
....@@ -911,7 +912,7 @@
911912 	}
912913 	st->vref_mv = prop;
913914 
914
-	ret = at91_adc_of_get_resolution(st, pdev);
915
+	ret = at91_adc_of_get_resolution(idev, pdev);
915916 	if (ret)
916917 		goto error_ret;
917918 
....@@ -1011,9 +1012,9 @@
10111012 		at91_adc_writel(st, AT91_ADC_IDR, AT91RL_ADC_IER_PEN);
10121013 }
10131014 
1014
-static int at91_ts_hw_init(struct at91_adc_state *st, u32 adc_clk_khz)
1015
+static int at91_ts_hw_init(struct iio_dev *idev, u32 adc_clk_khz)
10151016 {
1016
-	struct iio_dev *idev = iio_priv_to_dev(st);
1017
+	struct at91_adc_state *st = iio_priv(idev);
10171018 	u32 reg = 0;
10181019 	u32 tssctim = 0;
10191020 	int i = 0;
....@@ -1086,11 +1087,11 @@
10861087 	return 0;
10871088 }
10881089 
1089
-static int at91_ts_register(struct at91_adc_state *st,
1090
+static int at91_ts_register(struct iio_dev *idev,
10901091 		struct platform_device *pdev)
10911092 {
1093
+	struct at91_adc_state *st = iio_priv(idev);
10921094 	struct input_dev *input;
1093
-	struct iio_dev *idev = iio_priv_to_dev(st);
10941095 	int ret;
10951096 
10961097 	input = input_allocate_device();
....@@ -1153,7 +1154,6 @@
11531154 	int ret;
11541155 	struct iio_dev *idev;
11551156 	struct at91_adc_state *st;
1156
-	struct resource *res;
11571157 	u32 reg;
11581158 
11591159 	idev = devm_iio_device_alloc(&pdev->dev, sizeof(struct at91_adc_state));
....@@ -1163,7 +1163,7 @@
11631163 	st = iio_priv(idev);
11641164 
11651165 	if (pdev->dev.of_node)
1166
-		ret = at91_adc_probe_dt(st, pdev);
1166
+		ret = at91_adc_probe_dt(idev, pdev);
11671167 	else
11681168 		ret = at91_adc_probe_pdata(st, pdev);
11691169 
....@@ -1174,20 +1174,15 @@
11741174 
11751175 	platform_set_drvdata(pdev, idev);
11761176 
1177
-	idev->dev.parent = &pdev->dev;
11781177 	idev->name = dev_name(&pdev->dev);
11791178 	idev->modes = INDIO_DIRECT_MODE;
11801179 	idev->info = &at91_adc_info;
11811180 
11821181 	st->irq = platform_get_irq(pdev, 0);
1183
-	if (st->irq < 0) {
1184
-		dev_err(&pdev->dev, "No IRQ ID is designated\n");
1182
+	if (st->irq < 0)
11851183 		return -ENODEV;
1186
-	}
11871184 
1188
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1189
-
1190
-	st->reg_base = devm_ioremap_resource(&pdev->dev, res);
1185
+	st->reg_base = devm_platform_ioremap_resource(pdev, 0);
11911186 	if (IS_ERR(st->reg_base))
11921187 		return PTR_ERR(st->reg_base);
11931188 
....@@ -1307,11 +1302,11 @@
13071302 			goto error_disable_adc_clk;
13081303 		}
13091304 	} else {
1310
-		ret = at91_ts_register(st, pdev);
1305
+		ret = at91_ts_register(idev, pdev);
13111306 		if (ret)
13121307 			goto error_disable_adc_clk;
13131308 
1314
-		at91_ts_hw_init(st, adc_clk_khz);
1309
+		at91_ts_hw_init(idev, adc_clk_khz);
13151310 	}
13161311 
13171312 	ret = iio_device_register(idev);
....@@ -1360,7 +1355,7 @@
13601355 #ifdef CONFIG_PM_SLEEP
13611356 static int at91_adc_suspend(struct device *dev)
13621357 {
1363
-	struct iio_dev *idev = platform_get_drvdata(to_platform_device(dev));
1358
+	struct iio_dev *idev = dev_get_drvdata(dev);
13641359 	struct at91_adc_state *st = iio_priv(idev);
13651360 
13661361 	pinctrl_pm_select_sleep_state(dev);
....@@ -1371,7 +1366,7 @@
13711366 
13721367 static int at91_adc_resume(struct device *dev)
13731368 {
1374
-	struct iio_dev *idev = platform_get_drvdata(to_platform_device(dev));
1369
+	struct iio_dev *idev = dev_get_drvdata(dev);
13751370 	struct at91_adc_state *st = iio_priv(idev);
13761371 
13771372 	clk_prepare_enable(st->clk);
....@@ -1476,7 +1471,7 @@
14761471 	.id_table = at91_adc_ids,
14771472 	.driver = {
14781473 		   .name = DRIVER_NAME,
1479
-		   .of_match_table = of_match_ptr(at91_adc_dt_ids),
1474
+		   .of_match_table = at91_adc_dt_ids,
14801475 		   .pm = &at91_adc_pm_ops,
14811476 	},
14821477 };