linux-kernel - [PATCH v1 2/4] misc: adps990x: convert to OF

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Message-Id: <20230308090219.12710-3-clamor95@gmail.com>
Date:   Wed,  8 Mar 2023 11:02:17 +0200
From:   Svyatoslav Ryhel <clamor95@...il.com>
To:     Jonathan Cameron <jic23@...nel.org>,
        Lars-Peter Clausen <lars@...afoo.de>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Derek Kiernan <derek.kiernan@...inx.com>,
        Dragan Cvetic <dragan.cvetic@...inx.com>,
        Arnd Bergmann <arnd@...db.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Svyatoslav Ryhel <clamor95@...il.com>,
        Dmitry Osipenko <dmitry.osipenko@...labora.com>
Cc:     linux-iio@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH v1 2/4] misc: adps990x: convert to OF

Add ability to get essential values from device tree.

Signed-off-by: Svyatoslav Ryhel <clamor95@...il.com>
---
 drivers/misc/apds990x.c | 56 +++++++++++++++++++++++++++++++----------
 1 file changed, 43 insertions(+), 13 deletions(-)

diff --git a/drivers/misc/apds990x.c b/drivers/misc/apds990x.c
index 0024503ea6db..c53ead5a575d 100644
--- a/drivers/misc/apds990x.c
+++ b/drivers/misc/apds990x.c
@@ -180,8 +180,8 @@ static const u16 arates_hz[] = {10, 5, 2, 1};
 static const u8 apersis[] = {1, 2, 4, 5};
 
 /* Regulators */
-static const char reg_vcc[] = "Vdd";
-static const char reg_vled[] = "Vled";
+static const char reg_vcc[] = "vdd";
+static const char reg_vled[] = "vled";
 
 static int apds990x_read_byte(struct apds990x_chip *chip, u8 reg, u8 *data)
 {
@@ -1048,9 +1048,38 @@ static struct attribute *sysfs_attrs_ctrl[] = {
 };
 
 static const struct attribute_group apds990x_attribute_group[] = {
-	{.attrs = sysfs_attrs_ctrl },
+	{ .attrs = sysfs_attrs_ctrl },
 };
 
+static int apds990x_of_probe(struct i2c_client *client,
+			     struct apds990x_chip *chip)
+{
+	struct apds990x_platform_data *pdata;
+	u32 ret, val;
+
+	pdata = devm_kzalloc(&client->dev, sizeof(*pdata), GFP_KERNEL);
+	if (!pdata)
+		return -ENOMEM;
+
+	ret = device_property_read_u32(&client->dev, "avago,pdrive", &val);
+	if (ret) {
+		dev_info(&client->dev, "pdrive property is missing: ret %d\n", ret);
+		return ret;
+	}
+	pdata->pdrive = val;
+
+	ret = device_property_read_u32(&client->dev, "avago,ppcount", &val);
+	if (ret) {
+		dev_info(&client->dev, "ppcount property is missing: ret %d\n", ret);
+		return ret;
+	}
+	pdata->ppcount = val;
+
+	chip->pdata = pdata;
+
+	return 0;
+}
+
 static int apds990x_probe(struct i2c_client *client)
 {
 	struct apds990x_chip *chip;
@@ -1065,13 +1094,10 @@ static int apds990x_probe(struct i2c_client *client)
 
 	init_waitqueue_head(&chip->wait);
 	mutex_init(&chip->mutex);
-	chip->pdata	= client->dev.platform_data;
 
-	if (chip->pdata == NULL) {
-		dev_err(&client->dev, "platform data is mandatory\n");
-		err = -EINVAL;
-		goto fail1;
-	}
+	chip->pdata = client->dev.platform_data;
+	if (!chip->pdata)
+		apds990x_of_probe(client, chip);
 
 	if (chip->pdata->cf.ga == 0) {
 		/* set uncovered sensor default parameters */
@@ -1160,8 +1186,7 @@ static int apds990x_probe(struct i2c_client *client)
 
 	err = request_threaded_irq(client->irq, NULL,
 				apds990x_irq,
-				IRQF_TRIGGER_FALLING | IRQF_TRIGGER_LOW |
-				IRQF_ONESHOT,
+				IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
 				"apds990x", chip);
 	if (err) {
 		dev_err(&client->dev, "could not get IRQ %d\n",
@@ -1252,11 +1277,16 @@ static int apds990x_runtime_resume(struct device *dev)
 
 #endif
 
+static const struct of_device_id apds990x_match_table[] = {
+	{ .compatible = "avago,apds990x" },
+	{ },
+};
+MODULE_DEVICE_TABLE(of, apds990x_match_table);
+
 static const struct i2c_device_id apds990x_id[] = {
 	{"apds990x", 0 },
 	{}
 };
-
 MODULE_DEVICE_TABLE(i2c, apds990x_id);
 
 static const struct dev_pm_ops apds990x_pm_ops = {
@@ -1270,12 +1300,12 @@ static struct i2c_driver apds990x_driver = {
 	.driver	 = {
 		.name	= "apds990x",
 		.pm	= &apds990x_pm_ops,
+		.of_match_table = apds990x_match_table,
 	},
 	.probe_new = apds990x_probe,
 	.remove	  = apds990x_remove,
 	.id_table = apds990x_id,
 };
-
 module_i2c_driver(apds990x_driver);
 
 MODULE_DESCRIPTION("APDS990X combined ALS and proximity sensor");
-- 
2.37.2