iio: add enable and disable services to iio backend framework

Add iio_backend_disable() and iio_backend_enable() APIs to allow
IIO backend consumer to request backend disabling and enabling.

Signed-off-by: Olivier Moysan <olivier.moysan@foss.st.com>
Reviewed-by: Nuno Sa <nuno.sa@analog.com>
Link: https://patch.msgid.link/20240730084640.1307938-3-olivier.moysan@foss.st.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

diff --git a/drivers/iio/industrialio-backend.c b/drivers/iio/industrialio-backend.c
index dfaa5f34a7a5d118120c450d5249f09af86d2a06..8a7ff783ae29afe8d9e7f7751eeb00370f7a0d8c 100644 (file)
--- a/drivers/iio/industrialio-backend.c
+++ b/drivers/iio/industrialio-backend.c
@@ -291,6 +291,29 @@ static void __iio_backend_disable(void *back)
        iio_backend_void_op_call(back, disable);
 }
 
+/**
+ * iio_backend_disable - Backend disable
+ * @back: Backend device
+ */
+void iio_backend_disable(struct iio_backend *back)
+{
+       __iio_backend_disable(back);
+}
+EXPORT_SYMBOL_NS_GPL(iio_backend_disable, IIO_BACKEND);
+
+/**
+ * iio_backend_enable - Backend enable
+ * @back: Backend device
+ *
+ * RETURNS:
+ * 0 on success, negative error number on failure.
+ */
+int iio_backend_enable(struct iio_backend *back)
+{
+       return iio_backend_op_call(back, enable);
+}
+EXPORT_SYMBOL_NS_GPL(iio_backend_enable, IIO_BACKEND);
+
 /**
  * devm_iio_backend_enable - Device managed backend enable
  * @dev: Consumer device for the backend
@@ -303,7 +326,7 @@ int devm_iio_backend_enable(struct device *dev, struct iio_backend *back)
 {
        int ret;
 
-       ret = iio_backend_op_call(back, enable);
+       ret = iio_backend_enable(back);
        if (ret)
                return ret;
 

diff --git a/include/linux/iio/backend.h b/include/linux/iio/backend.h
index 838092b0de3d72f4cc959291e74e974055733e7a..b0b663163ff447cea5e0a7aabd1dc4d4a5df7c34 100644 (file)
--- a/include/linux/iio/backend.h
+++ b/include/linux/iio/backend.h
@@ -144,6 +144,8 @@ struct iio_backend_info {
 int iio_backend_chan_enable(struct iio_backend *back, unsigned int chan);
 int iio_backend_chan_disable(struct iio_backend *back, unsigned int chan);
 int devm_iio_backend_enable(struct device *dev, struct iio_backend *back);
+int iio_backend_enable(struct iio_backend *back);
+void iio_backend_disable(struct iio_backend *back);
 int iio_backend_data_format_set(struct iio_backend *back, unsigned int chan,
                                const struct iio_backend_data_fmt *data);
 int iio_backend_data_source_set(struct iio_backend *back, unsigned int chan,