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2024-02-19 151fecfb72a0d602dfe79790602ef64b4e241574 
 kernel/include/linux/iio/adc/ad_sigma_delta.h
....@@ -1,10 +1,9 @@
1
+/* SPDX-License-Identifier: GPL-2.0-only */
12 /*
23  * Support code for Analog Devices Sigma-Delta ADCs
34  *
45  * Copyright 2012 Analog Devices Inc.
56  *  Author: Lars-Peter Clausen <lars@metafoo.de>
6
- *
7
- * Licensed under the GPL-2.
87  */
98 #ifndef __AD_SIGMA_DELTA_H__
109 #define __AD_SIGMA_DELTA_H__
....@@ -39,6 +38,9 @@
3938  *		if there is just one read-only sample data shift register.
4039  * @addr_shift: Shift of the register address in the communications register.
4140  * @read_mask: Mask for the communications register having the read bit set.
41
+ * @data_reg: Address of the data register, if 0 the default address of 0x3 will
42
+ *   be used.
43
+ * @irq_flags: flags for the interrupt used by the triggered buffer
4244  */
4345 struct ad_sigma_delta_info {
4446 	int (*set_channel)(struct ad_sigma_delta *, unsigned int channel);
....@@ -47,6 +49,8 @@
4749 	bool has_registers;
4850 	unsigned int addr_shift;
4951 	unsigned int read_mask;
52
+	unsigned int data_reg;
53
+	unsigned long irq_flags;
5054 };
5155 
5256 /**
....@@ -75,8 +79,12 @@
7579 	/*
7680 	 * DMA (thus cache coherency maintenance) requires the
7781 	 * transfer buffers to live in their own cache lines.
82
+	 * 'tx_buf' is up to 32 bits.
83
+	 * 'rx_buf' is up to 32 bits per sample + 64 bit timestamp,
84
+	 * rounded to 16 bytes to take into account padding.
7885 	 */
79
-	uint8_t				data[4] ____cacheline_aligned;
86
+	uint8_t				tx_buf[4] ____cacheline_aligned;
87
+	uint8_t				rx_buf[16] __aligned(8);
8088 };
8189 
8290 static inline int ad_sigma_delta_set_channel(struct ad_sigma_delta *sd,
....@@ -117,6 +125,8 @@
117125 
118126 int ad_sigma_delta_single_conversion(struct iio_dev *indio_dev,
119127 	const struct iio_chan_spec *chan, int *val);
128
+int ad_sd_calibrate(struct ad_sigma_delta *sigma_delta,
129
+	unsigned int mode, unsigned int channel);
120130 int ad_sd_calibrate_all(struct ad_sigma_delta *sigma_delta,
121131 	const struct ad_sd_calib_data *cd, unsigned int n);
122132 int ad_sd_init(struct ad_sigma_delta *sigma_delta, struct iio_dev *indio_dev,
....@@ -126,63 +136,5 @@
126136 void ad_sd_cleanup_buffer_and_trigger(struct iio_dev *indio_dev);
127137 
128138 int ad_sd_validate_trigger(struct iio_dev *indio_dev, struct iio_trigger *trig);
129
-
130
-#define __AD_SD_CHANNEL(_si, _channel1, _channel2, _address, _bits, \
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-	_storagebits, _shift, _extend_name, _type, _mask_all) \
132
-	{ \
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-		.type = (_type), \
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-		.differential = (_channel2 == -1 ? 0 : 1), \
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-		.indexed = 1, \
136
-		.channel = (_channel1), \
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-		.channel2 = (_channel2), \
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-		.address = (_address), \
139
-		.extend_name = (_extend_name), \
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-		.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \
141
-			BIT(IIO_CHAN_INFO_OFFSET), \
142
-		.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE), \
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-		.info_mask_shared_by_all = _mask_all, \
144
-		.scan_index = (_si), \
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-		.scan_type = { \
146
-			.sign = 'u', \
147
-			.realbits = (_bits), \
148
-			.storagebits = (_storagebits), \
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-			.shift = (_shift), \
150
-			.endianness = IIO_BE, \
151
-		}, \
152
-	}
153
-
154
-#define AD_SD_DIFF_CHANNEL(_si, _channel1, _channel2, _address, _bits, \
155
-	_storagebits, _shift) \
156
-	__AD_SD_CHANNEL(_si, _channel1, _channel2, _address, _bits, \
157
-		_storagebits, _shift, NULL, IIO_VOLTAGE, \
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-		BIT(IIO_CHAN_INFO_SAMP_FREQ))
159
-
160
-#define AD_SD_SHORTED_CHANNEL(_si, _channel, _address, _bits, \
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-	_storagebits, _shift) \
162
-	__AD_SD_CHANNEL(_si, _channel, _channel, _address, _bits, \
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-		_storagebits, _shift, "shorted", IIO_VOLTAGE, \
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-		BIT(IIO_CHAN_INFO_SAMP_FREQ))
165
-
166
-#define AD_SD_CHANNEL(_si, _channel, _address, _bits, \
167
-	_storagebits, _shift) \
168
-	__AD_SD_CHANNEL(_si, _channel, -1, _address, _bits, \
169
-		_storagebits, _shift, NULL, IIO_VOLTAGE, \
170
-		 BIT(IIO_CHAN_INFO_SAMP_FREQ))
171
-
172
-#define AD_SD_CHANNEL_NO_SAMP_FREQ(_si, _channel, _address, _bits, \
173
-	_storagebits, _shift) \
174
-	__AD_SD_CHANNEL(_si, _channel, -1, _address, _bits, \
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-		_storagebits, _shift, NULL, IIO_VOLTAGE, 0)
176
-
177
-#define AD_SD_TEMP_CHANNEL(_si, _address, _bits, _storagebits, _shift) \
178
-	__AD_SD_CHANNEL(_si, 0, -1, _address, _bits, \
179
-		_storagebits, _shift, NULL, IIO_TEMP, \
180
-		BIT(IIO_CHAN_INFO_SAMP_FREQ))
181
-
182
-#define AD_SD_SUPPLY_CHANNEL(_si, _channel, _address, _bits, _storagebits, \
183
-	_shift) \
184
-	__AD_SD_CHANNEL(_si, _channel, -1, _address, _bits, \
185
-		_storagebits, _shift, "supply", IIO_VOLTAGE, \
186
-		BIT(IIO_CHAN_INFO_SAMP_FREQ))
187139 
188140 #endif