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-rw-r--r--drivers/iio/pressure/hsc030pa.h74
1 files changed, 74 insertions, 0 deletions
diff --git a/drivers/iio/pressure/hsc030pa.h b/drivers/iio/pressure/hsc030pa.h
new file mode 100644
index 0000000000..d20420dba4
--- /dev/null
+++ b/drivers/iio/pressure/hsc030pa.h
@@ -0,0 +1,74 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Honeywell TruStability HSC Series pressure/temperature sensor
+ *
+ * Copyright (c) 2023 Petre Rodan <petre.rodan@subdimension.ro>
+ */
+
+#ifndef _HSC030PA_H
+#define _HSC030PA_H
+
+#include <linux/types.h>
+
+#define HSC_REG_MEASUREMENT_RD_SIZE 4
+
+struct device;
+
+struct iio_chan_spec;
+struct iio_dev;
+
+struct hsc_data;
+struct hsc_chip_data;
+
+typedef int (*hsc_recv_fn)(struct hsc_data *);
+
+/**
+ * struct hsc_data
+ * @dev: current device structure
+ * @chip: structure containing chip's channel properties
+ * @recv_cb: function that implements the chip reads
+ * @is_valid: true if last transfer has been validated
+ * @pmin: minimum measurable pressure limit
+ * @pmax: maximum measurable pressure limit
+ * @outmin: minimum raw pressure in counts (based on transfer function)
+ * @outmax: maximum raw pressure in counts (based on transfer function)
+ * @function: transfer function
+ * @p_scale: pressure scale
+ * @p_scale_dec: pressure scale, decimal places
+ * @p_offset: pressure offset
+ * @p_offset_dec: pressure offset, decimal places
+ * @buffer: raw conversion data
+ */
+struct hsc_data {
+ struct device *dev;
+ const struct hsc_chip_data *chip;
+ hsc_recv_fn recv_cb;
+ bool is_valid;
+ s32 pmin;
+ s32 pmax;
+ u32 outmin;
+ u32 outmax;
+ u32 function;
+ s64 p_scale;
+ s32 p_scale_dec;
+ s64 p_offset;
+ s32 p_offset_dec;
+ u8 buffer[HSC_REG_MEASUREMENT_RD_SIZE] __aligned(IIO_DMA_MINALIGN);
+};
+
+struct hsc_chip_data {
+ bool (*valid)(struct hsc_data *data);
+ const struct iio_chan_spec *channels;
+ u8 num_channels;
+};
+
+enum hsc_func_id {
+ HSC_FUNCTION_A,
+ HSC_FUNCTION_B,
+ HSC_FUNCTION_C,
+ HSC_FUNCTION_F,
+};
+
+int hsc_common_probe(struct device *dev, hsc_recv_fn recv);
+
+#endif