linux-kernel - [PATCH 4/8] iio: backend: add API for interface configuration

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-Id: <20241216-wip-bl-ad3552r-axi-v0-iio-testing-carlos-v1-4-856ff71fc930@baylibre.com>
Date: Mon, 16 Dec 2024 21:36:24 +0100
From: Angelo Dureghello <adureghello@...libre.com>
To: Lars-Peter Clausen <lars@...afoo.de>, 
 Michael Hennerich <Michael.Hennerich@...log.com>, 
 Jonathan Cameron <jic23@...nel.org>, 
 Mihail Chindris <mihail.chindris@...log.com>, Nuno Sa <nuno.sa@...log.com>, 
 David Lechner <dlechner@...libre.com>, 
 Olivier Moysan <olivier.moysan@...s.st.com>
Cc: Jonathan Cameron <Jonathan.Cameron@...wei.com>, 
 linux-iio@...r.kernel.org, linux-kernel@...r.kernel.org, 
 Angelo Dureghello <adureghello@...libre.com>, 
 Antoniu Miclaus <antoniu.miclaus@...log.com>
Subject: [PATCH 4/8] iio: backend: add API for interface configuration

From: Antoniu Miclaus <antoniu.miclaus@...log.com>

Add backend support for setting and getting the interface type
in use.

Link: https://lore.kernel.org/linux-iio/20241129153546.63584-1-antoniu.miclaus@analog.com/T/#m6d86939078d780512824f1540145aade38b0990b
Signed-off-by: Antoniu Miclaus <antoniu.miclaus@...log.com>
Co-developed-by: Angelo Dureghello <adureghello@...libre.com>
Signed-off-by: Angelo Dureghello <adureghello@...libre.com>
---
This patch has been picked up from the Antoniu patchset
still not accepted, and extended with the interface setter,
fixing also namespace names to be between quotation marks.
---
 drivers/iio/industrialio-backend.c | 42 ++++++++++++++++++++++++++++++++++++++
 include/linux/iio/backend.h        | 19 +++++++++++++++++
 2 files changed, 61 insertions(+)

diff --git a/drivers/iio/industrialio-backend.c b/drivers/iio/industrialio-backend.c
index 363281272035..6edc3e685f6a 100644
--- a/drivers/iio/industrialio-backend.c
+++ b/drivers/iio/industrialio-backend.c
@@ -636,6 +636,48 @@ 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_interface_type_set - set the interface type used.
+ * @back: Backend device
+ * @type: Interface type
+ *
+ * RETURNS:
+ * 0 on success, negative error number on failure.
+ */
+int iio_backend_interface_type_set(struct iio_backend *back,
+				   enum iio_backend_interface_type type)
+{
+	if (type >= IIO_BACKEND_INTERFACE_MAX)
+		return -EINVAL;
+
+	return  iio_backend_op_call(back, interface_type_set, type);
+}
+EXPORT_SYMBOL_NS_GPL(iio_backend_interface_type_set, "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 10be00f3b120..2b7221099d8c 100644
--- a/include/linux/iio/backend.h
+++ b/include/linux/iio/backend.h
@@ -70,6 +70,15 @@ 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_SERIAL_SPI,
+	IIO_BACKEND_INTERFACE_SERIAL_DSPI,
+	IIO_BACKEND_INTERFACE_SERIAL_QSPI,
+	IIO_BACKEND_INTERFACE_MAX
+};
+
 /**
  * struct iio_backend_ops - operations structure for an iio_backend
  * @enable: Enable backend.
@@ -88,6 +97,8 @@ 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.
+ * @interface_type_set: Interface type setter.
  * @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.
@@ -128,6 +139,10 @@ 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 (*interface_type_set)(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);
@@ -186,6 +201,10 @@ 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_interface_type_set(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