forked from ~ljy/RK356X_SDK_RELEASE
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2024-01-04 1543e317f1da31b75942316931e8f491a8920811 
 kernel/drivers/iio/accel/mma8452.c
....@@ -31,6 +31,7 @@
3131 #include <linux/of_device.h>
3232 #include <linux/of_irq.h>
3333 #include <linux/pm_runtime.h>
34
+#include <linux/regulator/consumer.h>
3435 
3536 #define MMA8452_STATUS				0x00
3637 #define  MMA8452_STATUS_DRDY			(BIT(2) | BIT(1) | BIT(0))
....@@ -107,6 +108,8 @@
107108 	u8 data_cfg;
108109 	const struct mma_chip_info *chip_info;
109110 	int sleep_val;
111
+	struct regulator *vdd_reg;
112
+	struct regulator *vddio_reg;
110113 
111114 	/* Ensure correct alignment of time stamp when present */
112115 	struct {
....@@ -173,6 +176,7 @@
173176  * @enabled_events:		event flags enabled and handled by this driver
174177  */
175178 struct mma_chip_info {
179
+	const char *name;
176180 	u8 chip_id;
177181 	const struct iio_chan_spec *channels;
178182 	int num_channels;
....@@ -1300,6 +1304,7 @@
13001304 
13011305 static const struct mma_chip_info mma_chip_info_table[] = {
13021306 	[mma8451] = {
1307
+		.name = "mma8451",
13031308 		.chip_id = MMA8451_DEVICE_ID,
13041309 		.channels = mma8451_channels,
13051310 		.num_channels = ARRAY_SIZE(mma8451_channels),
....@@ -1324,6 +1329,7 @@
13241329 					MMA8452_INT_FF_MT,
13251330 	},
13261331 	[mma8452] = {
1332
+		.name = "mma8452",
13271333 		.chip_id = MMA8452_DEVICE_ID,
13281334 		.channels = mma8452_channels,
13291335 		.num_channels = ARRAY_SIZE(mma8452_channels),
....@@ -1340,6 +1346,7 @@
13401346 					MMA8452_INT_FF_MT,
13411347 	},
13421348 	[mma8453] = {
1349
+		.name = "mma8453",
13431350 		.chip_id = MMA8453_DEVICE_ID,
13441351 		.channels = mma8453_channels,
13451352 		.num_channels = ARRAY_SIZE(mma8453_channels),
....@@ -1356,6 +1363,7 @@
13561363 					MMA8452_INT_FF_MT,
13571364 	},
13581365 	[mma8652] = {
1366
+		.name = "mma8652",
13591367 		.chip_id = MMA8652_DEVICE_ID,
13601368 		.channels = mma8652_channels,
13611369 		.num_channels = ARRAY_SIZE(mma8652_channels),
....@@ -1365,6 +1373,7 @@
13651373 		.enabled_events = MMA8452_INT_FF_MT,
13661374 	},
13671375 	[mma8653] = {
1376
+		.name = "mma8653",
13681377 		.chip_id = MMA8653_DEVICE_ID,
13691378 		.channels = mma8653_channels,
13701379 		.num_channels = ARRAY_SIZE(mma8653_channels),
....@@ -1379,6 +1388,7 @@
13791388 		.enabled_events = MMA8452_INT_FF_MT,
13801389 	},
13811390 	[fxls8471] = {
1391
+		.name = "fxls8471",
13821392 		.chip_id = FXLS8471_DEVICE_ID,
13831393 		.channels = mma8451_channels,
13841394 		.num_channels = ARRAY_SIZE(mma8451_channels),
....@@ -1486,10 +1496,14 @@
14861496 	int i;
14871497 	int ret;
14881498 
1489
-	ret = i2c_smbus_write_byte_data(client,	MMA8452_CTRL_REG2,
1499
+	/*
1500
+	 * Find on fxls8471, after config reset bit, it reset immediately,
1501
+	 * and will not give ACK, so here do not check the return value.
1502
+	 * The following code will read the reset register, and check whether
1503
+	 * this reset works.
1504
+	 */
1505
+	i2c_smbus_write_byte_data(client, MMA8452_CTRL_REG2,
14901506 					MMA8452_CTRL_REG2_RST);
1491
-	if (ret < 0)
1492
-		return ret;
14931507 
14941508 	for (i = 0; i < 10; i++) {
14951509 		usleep_range(100, 200);
....@@ -1522,13 +1536,6 @@
15221536 	struct mma8452_data *data;
15231537 	struct iio_dev *indio_dev;
15241538 	int ret;
1525
-	const struct of_device_id *match;
1526
-
1527
-	match = of_match_device(mma8452_dt_ids, &client->dev);
1528
-	if (!match) {
1529
-		dev_err(&client->dev, "unknown device model\n");
1530
-		return -ENODEV;
1531
-	}
15321539 
15331540 	indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
15341541 	if (!indio_dev)
....@@ -1537,11 +1544,42 @@
15371544 	data = iio_priv(indio_dev);
15381545 	data->client = client;
15391546 	mutex_init(&data->lock);
1540
-	data->chip_info = match->data;
1547
+
1548
+	data->chip_info = device_get_match_data(&client->dev);
1549
+	if (!data->chip_info) {
1550
+		if (id) {
1551
+			data->chip_info = &mma_chip_info_table[id->driver_data];
1552
+		} else {
1553
+			dev_err(&client->dev, "unknown device model\n");
1554
+			return -ENODEV;
1555
+		}
1556
+	}
1557
+
1558
+	data->vdd_reg = devm_regulator_get(&client->dev, "vdd");
1559
+	if (IS_ERR(data->vdd_reg))
1560
+		return dev_err_probe(&client->dev, PTR_ERR(data->vdd_reg),
1561
+				     "failed to get VDD regulator!\n");
1562
+
1563
+	data->vddio_reg = devm_regulator_get(&client->dev, "vddio");
1564
+	if (IS_ERR(data->vddio_reg))
1565
+		return dev_err_probe(&client->dev, PTR_ERR(data->vddio_reg),
1566
+				     "failed to get VDDIO regulator!\n");
1567
+
1568
+	ret = regulator_enable(data->vdd_reg);
1569
+	if (ret) {
1570
+		dev_err(&client->dev, "failed to enable VDD regulator!\n");
1571
+		return ret;
1572
+	}
1573
+
1574
+	ret = regulator_enable(data->vddio_reg);
1575
+	if (ret) {
1576
+		dev_err(&client->dev, "failed to enable VDDIO regulator!\n");
1577
+		goto disable_regulator_vdd;
1578
+	}
15411579 
15421580 	ret = i2c_smbus_read_byte_data(client, MMA8452_WHO_AM_I);
15431581 	if (ret < 0)
1544
-		return ret;
1582
+		goto disable_regulators;
15451583 
15461584 	switch (ret) {
15471585 	case MMA8451_DEVICE_ID:
....@@ -1552,18 +1590,18 @@
15521590 	case FXLS8471_DEVICE_ID:
15531591 		if (ret == data->chip_info->chip_id)
15541592 			break;
1555
-		/* else: fall through */
1593
+		fallthrough;
15561594 	default:
1557
-		return -ENODEV;
1595
+		ret = -ENODEV;
1596
+		goto disable_regulators;
15581597 	}
15591598 
15601599 	dev_info(&client->dev, "registering %s accelerometer; ID 0x%x\n",
1561
-		 match->compatible, data->chip_info->chip_id);
1600
+		 data->chip_info->name, data->chip_info->chip_id);
15621601 
15631602 	i2c_set_clientdata(client, indio_dev);
15641603 	indio_dev->info = &mma8452_info;
1565
-	indio_dev->name = id->name;
1566
-	indio_dev->dev.parent = &client->dev;
1604
+	indio_dev->name = data->chip_info->name;
15671605 	indio_dev->modes = INDIO_DIRECT_MODE;
15681606 	indio_dev->channels = data->chip_info->channels;
15691607 	indio_dev->num_channels = data->chip_info->num_channels;
....@@ -1571,13 +1609,13 @@
15711609 
15721610 	ret = mma8452_reset(client);
15731611 	if (ret < 0)
1574
-		return ret;
1612
+		goto disable_regulators;
15751613 
15761614 	data->data_cfg = MMA8452_DATA_CFG_FS_2G;
15771615 	ret = i2c_smbus_write_byte_data(client, MMA8452_DATA_CFG,
15781616 					data->data_cfg);
15791617 	if (ret < 0)
1580
-		return ret;
1618
+		goto disable_regulators;
15811619 
15821620 	/*
15831621 	 * By default set transient threshold to max to avoid events if
....@@ -1586,7 +1624,7 @@
15861624 	ret = i2c_smbus_write_byte_data(client, MMA8452_TRANSIENT_THS,
15871625 					MMA8452_TRANSIENT_THS_MASK);
15881626 	if (ret < 0)
1589
-		return ret;
1627
+		goto disable_regulators;
15901628 
15911629 	if (client->irq) {
15921630 		int irq2;
....@@ -1600,7 +1638,7 @@
16001638 						MMA8452_CTRL_REG5,
16011639 						data->chip_info->all_events);
16021640 			if (ret < 0)
1603
-				return ret;
1641
+				goto disable_regulators;
16041642 
16051643 			dev_dbg(&client->dev, "using interrupt line INT1\n");
16061644 		}
....@@ -1609,11 +1647,11 @@
16091647 					MMA8452_CTRL_REG4,
16101648 					data->chip_info->enabled_events);
16111649 		if (ret < 0)
1612
-			return ret;
1650
+			goto disable_regulators;
16131651 
16141652 		ret = mma8452_trigger_setup(indio_dev);
16151653 		if (ret < 0)
1616
-			return ret;
1654
+			goto disable_regulators;
16171655 	}
16181656 
16191657 	data->ctrl_reg1 = MMA8452_CTRL_ACTIVE |
....@@ -1669,12 +1707,19 @@
16691707 trigger_cleanup:
16701708 	mma8452_trigger_cleanup(indio_dev);
16711709 
1710
+disable_regulators:
1711
+	regulator_disable(data->vddio_reg);
1712
+
1713
+disable_regulator_vdd:
1714
+	regulator_disable(data->vdd_reg);
1715
+
16721716 	return ret;
16731717 }
16741718 
16751719 static int mma8452_remove(struct i2c_client *client)
16761720 {
16771721 	struct iio_dev *indio_dev = i2c_get_clientdata(client);
1722
+	struct mma8452_data *data = iio_priv(indio_dev);
16781723 
16791724 	iio_device_unregister(indio_dev);
16801725 
....@@ -1685,6 +1730,9 @@
16851730 	iio_triggered_buffer_cleanup(indio_dev);
16861731 	mma8452_trigger_cleanup(indio_dev);
16871732 	mma8452_standby(iio_priv(indio_dev));
1733
+
1734
+	regulator_disable(data->vddio_reg);
1735
+	regulator_disable(data->vdd_reg);
16881736 
16891737 	return 0;
16901738 }
....@@ -1704,6 +1752,18 @@
17041752 		return -EAGAIN;
17051753 	}
17061754 
1755
+	ret = regulator_disable(data->vddio_reg);
1756
+	if (ret) {
1757
+		dev_err(dev, "failed to disable VDDIO regulator\n");
1758
+		return ret;
1759
+	}
1760
+
1761
+	ret = regulator_disable(data->vdd_reg);
1762
+	if (ret) {
1763
+		dev_err(dev, "failed to disable VDD regulator\n");
1764
+		return ret;
1765
+	}
1766
+
17071767 	return 0;
17081768 }
17091769 
....@@ -1713,9 +1773,22 @@
17131773 	struct mma8452_data *data = iio_priv(indio_dev);
17141774 	int ret, sleep_val;
17151775 
1776
+	ret = regulator_enable(data->vdd_reg);
1777
+	if (ret) {
1778
+		dev_err(dev, "failed to enable VDD regulator\n");
1779
+		return ret;
1780
+	}
1781
+
1782
+	ret = regulator_enable(data->vddio_reg);
1783
+	if (ret) {
1784
+		dev_err(dev, "failed to enable VDDIO regulator\n");
1785
+		regulator_disable(data->vdd_reg);
1786
+		return ret;
1787
+	}
1788
+
17161789 	ret = mma8452_active(data);
17171790 	if (ret < 0)
1718
-		return ret;
1791
+		goto runtime_resume_failed;
17191792 
17201793 	ret = mma8452_get_odr_index(data);
17211794 	sleep_val = 1000 / mma8452_samp_freq[ret][0];
....@@ -1725,25 +1798,17 @@
17251798 		msleep_interruptible(sleep_val);
17261799 
17271800 	return 0;
1728
-}
1729
-#endif
17301801 
1731
-#ifdef CONFIG_PM_SLEEP
1732
-static int mma8452_suspend(struct device *dev)
1733
-{
1734
-	return mma8452_standby(iio_priv(i2c_get_clientdata(
1735
-		to_i2c_client(dev))));
1736
-}
1802
+runtime_resume_failed:
1803
+	regulator_disable(data->vddio_reg);
1804
+	regulator_disable(data->vdd_reg);
17371805 
1738
-static int mma8452_resume(struct device *dev)
1739
-{
1740
-	return mma8452_active(iio_priv(i2c_get_clientdata(
1741
-		to_i2c_client(dev))));
1806
+	return ret;
17421807 }
17431808 #endif
17441809 
17451810 static const struct dev_pm_ops mma8452_pm_ops = {
1746
-	SET_SYSTEM_SLEEP_PM_OPS(mma8452_suspend, mma8452_resume)
1811
+	SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, pm_runtime_force_resume)
17471812 	SET_RUNTIME_PM_OPS(mma8452_runtime_suspend,
17481813 			   mma8452_runtime_resume, NULL)
17491814 };
....@@ -1762,7 +1827,7 @@
17621827 static struct i2c_driver mma8452_driver = {
17631828 	.driver = {
17641829 		.name	= "mma8452",
1765
-		.of_match_table = of_match_ptr(mma8452_dt_ids),
1830
+		.of_match_table = mma8452_dt_ids,
17661831 		.pm	= &mma8452_pm_ops,
17671832 	},
17681833 	.probe = mma8452_probe,