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Message-ID: <20241101112358.22996-2-antoniu.miclaus@analog.com>
Date: Fri, 1 Nov 2024 13:23:53 +0200
From: Antoniu Miclaus <antoniu.miclaus@...log.com>
To: <jic23@...nel.org>, <conor+dt@...nel.org>, <dlechner@...libre.com>,
<linux-iio@...r.kernel.org>, <devicetree@...r.kernel.org>,
<linux-kernel@...r.kernel.org>, <linux-pwm@...r.kernel.org>
CC: Antoniu Miclaus <antoniu.miclaus@...log.com>
Subject: [PATCH v5 1/6] iio: backend: add API for interface get
Add backend support for obtaining the interface type used.
Signed-off-by: Antoniu Miclaus <antoniu.miclaus@...log.com>
---
changes in v5:
- drop IIO_BACKEND_INTERFACE_LVDS and IIO_BACKEND_INTERFACE_CMOS from enum
drivers/iio/industrialio-backend.c | 24 ++++++++++++++++++++++++
include/linux/iio/backend.h | 11 +++++++++++
2 files changed, 35 insertions(+)
diff --git a/drivers/iio/industrialio-backend.c b/drivers/iio/industrialio-backend.c
index 20b3b5212da7..c792cd1e24e8 100644
--- a/drivers/iio/industrialio-backend.c
+++ b/drivers/iio/industrialio-backend.c
@@ -636,6 +636,30 @@ ssize_t iio_backend_ext_info_set(struct iio_dev *indio_dev, uintptr_t private,
}
EXPORT_SYMBOL_NS_GPL(iio_backend_ext_info_set, IIO_BACKEND);
+/**
+ * iio_backend_interface_type_get - get the interface type used.
+ * @back: Backend device
+ * @type: Interface type
+ *
+ * RETURNS:
+ * 0 on success, negative error number on failure.
+ */
+int iio_backend_interface_type_get(struct iio_backend *back,
+ enum iio_backend_interface_type *type)
+{
+ int ret;
+
+ ret = iio_backend_op_call(back, interface_type_get, type);
+ if (ret)
+ return ret;
+
+ if (*type >= IIO_BACKEND_INTERFACE_MAX)
+ return -EINVAL;
+
+ return 0;
+}
+EXPORT_SYMBOL_NS_GPL(iio_backend_interface_type_get, IIO_BACKEND);
+
/**
* iio_backend_extend_chan_spec - Extend an IIO channel
* @back: Backend device
diff --git a/include/linux/iio/backend.h b/include/linux/iio/backend.h
index 37d56914d485..e5ea90f1c3e0 100644
--- a/include/linux/iio/backend.h
+++ b/include/linux/iio/backend.h
@@ -68,6 +68,12 @@ enum iio_backend_sample_trigger {
IIO_BACKEND_SAMPLE_TRIGGER_MAX
};
+enum iio_backend_interface_type {
+ IIO_BACKEND_INTERFACE_SERIAL_LVDS,
+ IIO_BACKEND_INTERFACE_SERIAL_CMOS,
+ IIO_BACKEND_INTERFACE_MAX
+};
+
/**
* struct iio_backend_ops - operations structure for an iio_backend
* @enable: Enable backend.
@@ -86,6 +92,7 @@ enum iio_backend_sample_trigger {
* @extend_chan_spec: Extend an IIO channel.
* @ext_info_set: Extended info setter.
* @ext_info_get: Extended info getter.
+ * @interface_type_get: Interface type.
* @read_raw: Read a channel attribute from a backend device
* @debugfs_print_chan_status: Print channel status into a buffer.
* @debugfs_reg_access: Read or write register value of backend.
@@ -121,6 +128,8 @@ struct iio_backend_ops {
const char *buf, size_t len);
int (*ext_info_get)(struct iio_backend *back, uintptr_t private,
const struct iio_chan_spec *chan, char *buf);
+ int (*interface_type_get)(struct iio_backend *back,
+ enum iio_backend_interface_type *type);
int (*read_raw)(struct iio_backend *back,
struct iio_chan_spec const *chan, int *val, int *val2,
long mask);
@@ -169,6 +178,8 @@ ssize_t iio_backend_ext_info_set(struct iio_dev *indio_dev, uintptr_t private,
const char *buf, size_t len);
ssize_t iio_backend_ext_info_get(struct iio_dev *indio_dev, uintptr_t private,
const struct iio_chan_spec *chan, char *buf);
+int iio_backend_interface_type_get(struct iio_backend *back,
+ enum iio_backend_interface_type *type);
int iio_backend_read_raw(struct iio_backend *back,
struct iio_chan_spec const *chan, int *val, int *val2,
long mask);
--
2.47.0
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