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remoteproc: Introduce rproc_of_parse_firmware() helper 

Add a new helper function rproc_of_parse_firmware() to the remoteproc
core that can be used by various remoteproc drivers to look up the
the "firmware-name" property from a rproc device node. This property
is already being used by multiple drivers, so this helper can avoid
repeating equivalent code in remoteproc drivers.

Signed-off-by: Suman Anna <s-anna@ti.com>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Reviewed-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Link: https://lore.kernel.org/r/20200721223617.20312-3-s-anna@ti.com
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
This commit is contained in:
Suman Anna 2020-07-21 17:36:13 -05:00 committed by Bjorn Andersson
parent 44aa656f22
commit a8aa5ee100
2 changed files with 25 additions and 0 deletions
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23
drivers/remoteproc/remoteproc_core.c
View File

@ -1046,6 +1046,29 @@ rproc_of_resm_mem_entry_init(struct device *dev, u32 of_resm_idx, size_t len,
}
EXPORT_SYMBOL(rproc_of_resm_mem_entry_init);
/**
* rproc_of_parse_firmware() - parse and return the firmware-name
* @dev: pointer on device struct representing a rproc
* @index: index to use for the firmware-name retrieval
* @fw_name: pointer to a character string, in which the firmware
* name is returned on success and unmodified otherwise.
*
* This is an OF helper function that parses a device's DT node for
* the "firmware-name" property and returns the firmware name pointer
* in @fw_name on success.
*
* Return: 0 on success, or an appropriate failure.
*/
int rproc_of_parse_firmware(struct device *dev, int index, const char **fw_name)
{
int ret;
ret = of_property_read_string_index(dev->of_node, "firmware-name",
index, fw_name);
return ret ? ret : 0;
}
EXPORT_SYMBOL(rproc_of_parse_firmware);
/*
* A lookup table for resource handlers. The indices are defined in
* enum fw_resource_type.

2
drivers/remoteproc/remoteproc_internal.h
View File

@ -28,6 +28,8 @@ struct rproc_debug_trace {
void rproc_release(struct kref *kref);
irqreturn_t rproc_vq_interrupt(struct rproc *rproc, int vq_id);
void rproc_vdev_release(struct kref *ref);
int rproc_of_parse_firmware(struct device *dev, int index,
const char **fw_name);
/* from remoteproc_virtio.c */
int rproc_add_virtio_dev(struct rproc_vdev *rvdev, int id);