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2024-05-10 37f49e37ab4cb5d0bc4c60eb5c6d4dd57db767bb

 kernel/drivers/iio/potentiostat/lmp91000.c
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@@ -11,7 +11,7 @@
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 #include <linux/module.h>
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 #include <linux/i2c.h>
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 #include <linux/delay.h>
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-#include <linux/of.h>
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+#include <linux/mod_devicetable.h>
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 #include <linux/regmap.h>
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 #include <linux/iio/iio.h>
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 #include <linux/iio/buffer.h>
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@@ -113,7 +113,7 @@
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 		return -EINVAL;
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 	/* delay till first temperature reading is complete */
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-	if ((state != channel) && (channel == LMP91000_REG_MODECN_TEMP))
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+	if (state != channel && channel == LMP91000_REG_MODECN_TEMP)
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 		usleep_range(3000, 4000);
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 	data->chan_select = channel != LMP91000_REG_MODECN_3LEAD;
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@@ -205,18 +205,16 @@
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 static int lmp91000_read_config(struct lmp91000_data *data)
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 {
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 	struct device *dev = data->dev;
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-	struct device_node *np = dev->of_node;
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 	unsigned int reg, val;
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 	int i, ret;
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-	ret = of_property_read_u32(np, "ti,tia-gain-ohm", &val);
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+	ret = device_property_read_u32(dev, "ti,tia-gain-ohm", &val);
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 	if (ret) {
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-		if (of_property_read_bool(np, "ti,external-tia-resistor"))
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-			val = 0;
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-		else {
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-			dev_err(dev, "no ti,tia-gain-ohm defined");
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+		if (!device_property_read_bool(dev, "ti,external-tia-resistor")) {
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+			dev_err(dev, "no ti,tia-gain-ohm defined and external resistor not specified\n");
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 			return ret;
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 		}
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+		val = 0;
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 	}
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 	ret = -EINVAL;
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@@ -233,7 +231,7 @@
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 		return ret;
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 	}
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-	ret = of_property_read_u32(np, "ti,rload-ohm", &val);
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+	ret = device_property_read_u32(dev, "ti,rload-ohm", &val);
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 	if (ret) {
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 		val = 100;
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 		dev_info(dev, "no ti,rload-ohm defined, default to %d\n", val);
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@@ -255,8 +253,8 @@
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 	regmap_write(data->regmap, LMP91000_REG_LOCK, 0);
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 	regmap_write(data->regmap, LMP91000_REG_TIACN, reg);
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-	regmap_write(data->regmap, LMP91000_REG_REFCN, LMP91000_REG_REFCN_EXT_REF
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-					| LMP91000_REG_REFCN_50_ZERO);
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+	regmap_write(data->regmap, LMP91000_REG_REFCN,
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+		     LMP91000_REG_REFCN_EXT_REF | LMP91000_REG_REFCN_50_ZERO);
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 	regmap_write(data->regmap, LMP91000_REG_LOCK, 1);
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 	return 0;
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@@ -276,8 +274,7 @@
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 static const struct iio_trigger_ops lmp91000_trigger_ops = {
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 };
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-
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-static int lmp91000_buffer_preenable(struct iio_dev *indio_dev)
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+static int lmp91000_buffer_postenable(struct iio_dev *indio_dev)
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 {
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 	struct lmp91000_data *data = iio_priv(indio_dev);
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@@ -294,8 +291,7 @@
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 }
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 static const struct iio_buffer_setup_ops lmp91000_buffer_setup_ops = {
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-	.preenable = lmp91000_buffer_preenable,
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-	.postenable = iio_triggered_buffer_postenable,
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+	.postenable = lmp91000_buffer_postenable,
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 	.predisable = lmp91000_buffer_predisable,
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 };
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@@ -315,7 +311,6 @@
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 	indio_dev->channels = lmp91000_channels;
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 	indio_dev->num_channels = ARRAY_SIZE(lmp91000_channels);
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 	indio_dev->name = LMP91000_DRV_NAME;
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-	indio_dev->dev.parent = &client->dev;
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 	indio_dev->modes = INDIO_DIRECT_MODE;
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 	i2c_set_clientdata(client, indio_dev);
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@@ -426,7 +421,7 @@
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 static struct i2c_driver lmp91000_driver = {
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 	.driver = {
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 		.name = LMP91000_DRV_NAME,
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-		.of_match_table = of_match_ptr(lmp91000_of_match),
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+		.of_match_table = lmp91000_of_match,
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 	},
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 	.probe = lmp91000_probe,
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 	.remove = lmp91000_remove,