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2024-05-10 37f49e37ab4cb5d0bc4c60eb5c6d4dd57db767bb

 kernel/drivers/staging/iio/frequency/ad9834.c
..
..
@@ -1,11 +1,11 @@
1
+// SPDX-License-Identifier: GPL-2.0
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2
 /*
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  * AD9833/AD9834/AD9837/AD9838 SPI DDS driver
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  *
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  * Copyright 2010-2011 Analog Devices Inc.
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- *
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- * Licensed under the GPL-2.
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  */
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7
 
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+#include <linux/clk.h>
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9
 #include <linux/interrupt.h>
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10
 #include <linux/workqueue.h>
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11
 #include <linux/device.h>
..
..
@@ -71,7 +71,7 @@
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 struct ad9834_state {
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 	struct spi_device		*spi;
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 	struct regulator		*reg;
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-	unsigned int			mclk;
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+	struct clk			*mclk;
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 	unsigned short			control;
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 	unsigned short			devid;
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 	struct spi_transfer		xfer;
..
..
@@ -110,12 +110,15 @@
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 static int ad9834_write_frequency(struct ad9834_state *st,
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111
 				  unsigned long addr, unsigned long fout)
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112
 {
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+	unsigned long clk_freq;
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 	unsigned long regval;
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115
 
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-	if (fout > (st->mclk / 2))
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+	clk_freq = clk_get_rate(st->mclk);
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+
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+	if (fout > (clk_freq / 2))
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119
 		return -EINVAL;
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120
 
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-	regval = ad9834_calc_freqreg(st->mclk, fout);
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+	regval = ad9834_calc_freqreg(clk_freq, fout);
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122
 
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 	st->freq_data[0] = cpu_to_be16(addr | (regval &
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 				       RES_MASK(AD9834_FREQ_BITS / 2)));
..
..
@@ -282,7 +285,7 @@
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 	struct ad9834_state *st = iio_priv(indio_dev);
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286
 	char *str;
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287
 
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-	if ((st->devid == ID_AD9833) || (st->devid == ID_AD9837))
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+	if (st->devid == ID_AD9833 || st->devid == ID_AD9837)
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 		str = "sine triangle square";
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290
 	else if (st->control & AD9834_OPBITEN)
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 		str = "sine";
..
..
@@ -389,16 +392,10 @@
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392
 
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393
 static int ad9834_probe(struct spi_device *spi)
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394
 {
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-	struct ad9834_platform_data *pdata = dev_get_platdata(&spi->dev);
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 	struct ad9834_state *st;
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 	struct iio_dev *indio_dev;
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 	struct regulator *reg;
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 	int ret;
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-
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-	if (!pdata) {
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-		dev_dbg(&spi->dev, "no platform data?\n");
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-		return -ENODEV;
401
-	}
402
399
 
403
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 	reg = devm_regulator_get(&spi->dev, "avdd");
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401
 	if (IS_ERR(reg))
..
..
@@ -418,11 +415,21 @@
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 	spi_set_drvdata(spi, indio_dev);
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416
 	st = iio_priv(indio_dev);
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 	mutex_init(&st->lock);
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-	st->mclk = pdata->mclk;
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+	st->mclk = devm_clk_get(&spi->dev, NULL);
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+	if (IS_ERR(st->mclk)) {
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+		ret = PTR_ERR(st->mclk);
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+		goto error_disable_reg;
422
+	}
423
+
424
+	ret = clk_prepare_enable(st->mclk);
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+	if (ret) {
426
+		dev_err(&spi->dev, "Failed to enable master clock\n");
427
+		goto error_disable_reg;
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+	}
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+
422
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 	st->spi = spi;
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431
 	st->devid = spi_get_device_id(spi)->driver_data;
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 	st->reg = reg;
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-	indio_dev->dev.parent = &spi->dev;
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433
 	indio_dev->name = spi_get_device_id(spi)->name;
427
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 	switch (st->devid) {
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435
 	case ID_AD9833:
..
..
@@ -454,42 +461,41 @@
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461
 	spi_message_add_tail(&st->freq_xfer[1], &st->freq_msg);
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462
 
456
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 	st->control = AD9834_B28 | AD9834_RESET;
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+	st->control |= AD9834_DIV2;
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465
 
458
-	if (!pdata->en_div2)
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-		st->control |= AD9834_DIV2;
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-
461
-	if (!pdata->en_signbit_msb_out && (st->devid == ID_AD9834))
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+	if (st->devid == ID_AD9834)
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 		st->control |= AD9834_SIGN_PIB;
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468
 
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 	st->data = cpu_to_be16(AD9834_REG_CMD | st->control);
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 	ret = spi_sync(st->spi, &st->msg);
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471
 	if (ret) {
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472
 		dev_err(&spi->dev, "device init failed\n");
468
-		goto error_disable_reg;
473
+		goto error_clock_unprepare;
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474
 	}
470
475
 
471
-	ret = ad9834_write_frequency(st, AD9834_REG_FREQ0, pdata->freq0);
476
+	ret = ad9834_write_frequency(st, AD9834_REG_FREQ0, 1000000);
472
477
 	if (ret)
473
-		goto error_disable_reg;
478
+		goto error_clock_unprepare;
474
479
 
475
-	ret = ad9834_write_frequency(st, AD9834_REG_FREQ1, pdata->freq1);
480
+	ret = ad9834_write_frequency(st, AD9834_REG_FREQ1, 5000000);
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481
 	if (ret)
477
-		goto error_disable_reg;
482
+		goto error_clock_unprepare;
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483
 
479
-	ret = ad9834_write_phase(st, AD9834_REG_PHASE0, pdata->phase0);
484
+	ret = ad9834_write_phase(st, AD9834_REG_PHASE0, 512);
480
485
 	if (ret)
481
-		goto error_disable_reg;
486
+		goto error_clock_unprepare;
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487
 
483
-	ret = ad9834_write_phase(st, AD9834_REG_PHASE1, pdata->phase1);
488
+	ret = ad9834_write_phase(st, AD9834_REG_PHASE1, 1024);
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489
 	if (ret)
485
-		goto error_disable_reg;
490
+		goto error_clock_unprepare;
486
491
 
487
492
 	ret = iio_device_register(indio_dev);
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493
 	if (ret)
489
-		goto error_disable_reg;
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+		goto error_clock_unprepare;
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495
 
491
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 	return 0;
492
-
497
+error_clock_unprepare:
498
+	clk_disable_unprepare(st->mclk);
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499
 error_disable_reg:
494
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 	regulator_disable(reg);
495
501
 
..
..
@@ -502,6 +508,7 @@
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 	struct ad9834_state *st = iio_priv(indio_dev);
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509
 
504
510
 	iio_device_unregister(indio_dev);
511
+	clk_disable_unprepare(st->mclk);
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512
 	regulator_disable(st->reg);
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513
 
507
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 	return 0;
..
..
@@ -516,9 +523,20 @@
516
523
 };
517
524
 MODULE_DEVICE_TABLE(spi, ad9834_id);
518
525
 
526
+static const struct of_device_id ad9834_of_match[] = {
527
+	{.compatible = "adi,ad9833"},
528
+	{.compatible = "adi,ad9834"},
529
+	{.compatible = "adi,ad9837"},
530
+	{.compatible = "adi,ad9838"},
531
+	{}
532
+};
533
+
534
+MODULE_DEVICE_TABLE(of, ad9834_of_match);
535
+
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536
 static struct spi_driver ad9834_driver = {
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 	.driver = {
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 		.name	= "ad9834",
539
+		.of_match_table = ad9834_of_match
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540
 	},
523
541
 	.probe		= ad9834_probe,
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542
 	.remove		= ad9834_remove,
..
..
@@ -526,6 +544,6 @@
526
544
 };
527
545
 module_spi_driver(ad9834_driver);
528
546
 
529
-MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
547
+MODULE_AUTHOR("Michael Hennerich <michael.hennerich@analog.com>");
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548
 MODULE_DESCRIPTION("Analog Devices AD9833/AD9834/AD9837/AD9838 DDS");
531
549
 MODULE_LICENSE("GPL v2");