disable FB

hc

2024-01-04 1543e317f1da31b75942316931e8f491a8920811

 kernel/drivers/iio/dac/ad5360.c
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@@ -1,10 +1,9 @@
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+// SPDX-License-Identifier: GPL-2.0-only
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 /*
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  * Analog devices AD5360, AD5361, AD5362, AD5363, AD5370, AD5371, AD5373
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  * multi-channel Digital to Analog Converters driver
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  *
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  * Copyright 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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 #include <linux/device.h>
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@@ -68,6 +67,7 @@
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  * @chip_info:		chip model specific constants, available modes etc
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  * @vref_reg:		vref supply regulators
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  * @ctrl:		control register cache
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+ * @lock:		lock to protect the data buffer during SPI ops
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  * @data:		spi transfer buffers
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  */
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@@ -76,6 +76,7 @@
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 	const struct ad5360_chip_info	*chip_info;
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 	struct regulator_bulk_data	vref_reg[3];
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 	unsigned int			ctrl;
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+	struct mutex			lock;
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 	/*
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 	 * DMA (thus cache coherency maintenance) requires the
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@@ -206,10 +207,11 @@
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 	unsigned int addr, unsigned int val, unsigned int shift)
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 {
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 	int ret;
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+	struct ad5360_state *st = iio_priv(indio_dev);
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-	mutex_lock(&indio_dev->mlock);
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+	mutex_lock(&st->lock);
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 	ret = ad5360_write_unlocked(indio_dev, cmd, addr, val, shift);
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-	mutex_unlock(&indio_dev->mlock);
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+	mutex_unlock(&st->lock);
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 	return ret;
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 }
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@@ -230,7 +232,7 @@
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 		},
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 	};
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-	mutex_lock(&indio_dev->mlock);
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+	mutex_lock(&st->lock);
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 	st->data[0].d32 = cpu_to_be32(AD5360_CMD(AD5360_CMD_SPECIAL_FUNCTION) |
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 		AD5360_ADDR(AD5360_REG_SF_READBACK) |
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@@ -241,7 +243,7 @@
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 	if (ret >= 0)
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 		ret = be32_to_cpu(st->data[1].d32) & 0xffff;
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-	mutex_unlock(&indio_dev->mlock);
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+	mutex_unlock(&st->lock);
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 	return ret;
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 }
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@@ -262,7 +264,7 @@
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 	struct ad5360_state *st = iio_priv(indio_dev);
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 	unsigned int ret;
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-	mutex_lock(&indio_dev->mlock);
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+	mutex_lock(&st->lock);
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 	st->ctrl |= set;
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 	st->ctrl &= ~clr;
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@@ -270,7 +272,7 @@
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 	ret = ad5360_write_unlocked(indio_dev, AD5360_CMD_SPECIAL_FUNCTION,
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 			AD5360_REG_SF_CTRL, st->ctrl, 0);
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-	mutex_unlock(&indio_dev->mlock);
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+	mutex_unlock(&st->lock);
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 	return ret;
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 }
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@@ -474,12 +476,13 @@
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 	st->chip_info = &ad5360_chip_info_tbl[type];
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 	st->spi = spi;
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-	indio_dev->dev.parent = &spi->dev;
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 	indio_dev->name = spi_get_device_id(spi)->name;
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 	indio_dev->info = &ad5360_info;
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 	indio_dev->modes = INDIO_DIRECT_MODE;
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 	indio_dev->num_channels = st->chip_info->num_channels;
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+	mutex_init(&st->lock);
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+
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 	ret = ad5360_alloc_channels(indio_dev);
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 	if (ret) {
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 		dev_err(&spi->dev, "Failed to allocate channel spec: %d\n", ret);