Adding upstream version 6.1.76.upstream/6.1.76upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 172 insertions, 0 deletions

diff --git a/drivers/iio/adc/ad7606.h b/drivers/iio/adc/ad7606.h
new file mode 100644
index 000000000..2dc4f599f
--- /dev/null
+++ b/drivers/iio/adc/ad7606.h
@@ -0,0 +1,172 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * AD7606 ADC driver
+ *
+ * Copyright 2011 Analog Devices Inc.
+ */
+
+#ifndef IIO_ADC_AD7606_H_
+#define IIO_ADC_AD7606_H_
+
+#define AD760X_CHANNEL(num, mask_sep, mask_type, mask_all) {	\
+		.type = IIO_VOLTAGE,				\
+		.indexed = 1,					\
+		.channel = num,					\
+		.address = num,					\
+		.info_mask_separate = mask_sep,			\
+		.info_mask_shared_by_type = mask_type,		\
+		.info_mask_shared_by_all = mask_all,		\
+		.scan_index = num,				\
+		.scan_type = {					\
+			.sign = 's',				\
+			.realbits = 16,				\
+			.storagebits = 16,			\
+			.endianness = IIO_CPU,			\
+		},						\
+}
+
+#define AD7605_CHANNEL(num)				\
+	AD760X_CHANNEL(num, BIT(IIO_CHAN_INFO_RAW),	\
+		BIT(IIO_CHAN_INFO_SCALE), 0)
+
+#define AD7606_CHANNEL(num)				\
+	AD760X_CHANNEL(num, BIT(IIO_CHAN_INFO_RAW),	\
+		BIT(IIO_CHAN_INFO_SCALE),		\
+		BIT(IIO_CHAN_INFO_OVERSAMPLING_RATIO))
+
+#define AD7616_CHANNEL(num)	\
+	AD760X_CHANNEL(num, BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),\
+		0, BIT(IIO_CHAN_INFO_OVERSAMPLING_RATIO))
+
+/**
+ * struct ad7606_chip_info - chip specific information
+ * @channels:		channel specification
+ * @num_channels:	number of channels
+ * @oversampling_avail	pointer to the array which stores the available
+ *			oversampling ratios.
+ * @oversampling_num	number of elements stored in oversampling_avail array
+ * @os_req_reset	some devices require a reset to update oversampling
+ * @init_delay_ms	required delay in miliseconds for initialization
+ *			after a restart
+ */
+struct ad7606_chip_info {
+	const struct iio_chan_spec	*channels;
+	unsigned int			num_channels;
+	const unsigned int		*oversampling_avail;
+	unsigned int			oversampling_num;
+	bool				os_req_reset;
+	unsigned long			init_delay_ms;
+};
+
+/**
+ * struct ad7606_state - driver instance specific data
+ * @dev		pointer to kernel device
+ * @chip_info		entry in the table of chips that describes this device
+ * @reg		regulator info for the power supply of the device
+ * @bops		bus operations (SPI or parallel)
+ * @range		voltage range selection, selects which scale to apply
+ * @oversampling	oversampling selection
+ * @base_address	address from where to read data in parallel operation
+ * @sw_mode_en		software mode enabled
+ * @scale_avail		pointer to the array which stores the available scales
+ * @num_scales		number of elements stored in the scale_avail array
+ * @oversampling_avail	pointer to the array which stores the available
+ *			oversampling ratios.
+ * @num_os_ratios	number of elements stored in oversampling_avail array
+ * @write_scale		pointer to the function which writes the scale
+ * @write_os		pointer to the function which writes the os
+ * @lock		protect sensor state from concurrent accesses to GPIOs
+ * @gpio_convst	GPIO descriptor for conversion start signal (CONVST)
+ * @gpio_reset		GPIO descriptor for device hard-reset
+ * @gpio_range		GPIO descriptor for range selection
+ * @gpio_standby	GPIO descriptor for stand-by signal (STBY),
+ *			controls power-down mode of device
+ * @gpio_frstdata	GPIO descriptor for reading from device when data
+ *			is being read on the first channel
+ * @gpio_os		GPIO descriptors to control oversampling on the device
+ * @complete		completion to indicate end of conversion
+ * @trig		The IIO trigger associated with the device.
+ * @data		buffer for reading data from the device
+ * @d16			be16 buffer for reading data from the device
+ */
+struct ad7606_state {
+	struct device			*dev;
+	const struct ad7606_chip_info	*chip_info;
+	struct regulator		*reg;
+	const struct ad7606_bus_ops	*bops;
+	unsigned int			range[16];
+	unsigned int			oversampling;
+	void __iomem			*base_address;
+	bool				sw_mode_en;
+	const unsigned int		*scale_avail;
+	unsigned int			num_scales;
+	const unsigned int		*oversampling_avail;
+	unsigned int			num_os_ratios;
+	int (*write_scale)(struct iio_dev *indio_dev, int ch, int val);
+	int (*write_os)(struct iio_dev *indio_dev, int val);
+
+	struct mutex			lock; /* protect sensor state */
+	struct gpio_desc		*gpio_convst;
+	struct gpio_desc		*gpio_reset;
+	struct gpio_desc		*gpio_range;
+	struct gpio_desc		*gpio_standby;
+	struct gpio_desc		*gpio_frstdata;
+	struct gpio_descs		*gpio_os;
+	struct iio_trigger		*trig;
+	struct completion		completion;
+
+	/*
+	 * DMA (thus cache coherency maintenance) may require the
+	 * transfer buffers to live in their own cache lines.
+	 * 16 * 16-bit samples + 64-bit timestamp
+	 */
+	unsigned short			data[20] __aligned(IIO_DMA_MINALIGN);
+	__be16				d16[2];
+};
+
+/**
+ * struct ad7606_bus_ops - driver bus operations
+ * @read_block		function pointer for reading blocks of data
+ * @sw_mode_config:	pointer to a function which configured the device
+ *			for software mode
+ * @reg_read	function pointer for reading spi register
+ * @reg_write	function pointer for writing spi register
+ * @write_mask	function pointer for write spi register with mask
+ * @rd_wr_cmd	pointer to the function which calculates the spi address
+ */
+struct ad7606_bus_ops {
+	/* more methods added in future? */
+	int (*read_block)(struct device *dev, int num, void *data);
+	int (*sw_mode_config)(struct iio_dev *indio_dev);
+	int (*reg_read)(struct ad7606_state *st, unsigned int addr);
+	int (*reg_write)(struct ad7606_state *st,
+				unsigned int addr,
+				unsigned int val);
+	int (*write_mask)(struct ad7606_state *st,
+				 unsigned int addr,
+				 unsigned long mask,
+				 unsigned int val);
+	u16 (*rd_wr_cmd)(int addr, char isWriteOp);
+};
+
+int ad7606_probe(struct device *dev, int irq, void __iomem *base_address,
+		 const char *name, unsigned int id,
+		 const struct ad7606_bus_ops *bops);
+
+enum ad7606_supported_device_ids {
+	ID_AD7605_4,
+	ID_AD7606_8,
+	ID_AD7606_6,
+	ID_AD7606_4,
+	ID_AD7606B,
+	ID_AD7616,
+};
+
+#ifdef CONFIG_PM_SLEEP
+extern const struct dev_pm_ops ad7606_pm_ops;
+#define AD7606_PM_OPS (&ad7606_pm_ops)
+#else
+#define AD7606_PM_OPS NULL
+#endif
+
+#endif /* IIO_ADC_AD7606_H_ */