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Message-ID: <20200612224914.7634-2-s-anna@ti.com>
Date: Fri, 12 Jun 2020 17:49:09 -0500
From: Suman Anna <s-anna@...com>
To: Bjorn Andersson <bjorn.andersson@...aro.org>,
Rob Herring <robh+dt@...nel.org>,
Mathieu Poirier <mathieu.poirier@...aro.org>
CC: Lokesh Vutla <lokeshvutla@...com>,
Grzegorz Jaszczyk <grzegorz.jaszczyk@...aro.org>,
<linux-remoteproc@...r.kernel.org>, <devicetree@...r.kernel.org>,
<linux-arm-kernel@...ts.infradead.org>,
<linux-kernel@...r.kernel.org>, Suman Anna <s-anna@...com>
Subject: [PATCH v3 1/6] 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@...com>
Reviewed-by: Bjorn Andersson <bjorn.andersson@...aro.org>
Reviewed-by: Mathieu Poirier <mathieu.poirier@...aro.org>
---
v3: No changes, picked up review tags
v2: https://patchwork.kernel.org/patch/11561791/
drivers/remoteproc/remoteproc_core.c | 23 +++++++++++++++++++++++
drivers/remoteproc/remoteproc_internal.h | 2 ++
2 files changed, 25 insertions(+)
diff --git a/drivers/remoteproc/remoteproc_core.c b/drivers/remoteproc/remoteproc_core.c
index 9f04c30c4aaf..c458b218d524 100644
--- a/drivers/remoteproc/remoteproc_core.c
+++ b/drivers/remoteproc/remoteproc_core.c
@@ -1034,6 +1034,29 @@ 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.
diff --git a/drivers/remoteproc/remoteproc_internal.h b/drivers/remoteproc/remoteproc_internal.h
index 4ba7cb59d3e8..e5341e91d2fc 100644
--- a/drivers/remoteproc/remoteproc_internal.h
+++ b/drivers/remoteproc/remoteproc_internal.h
@@ -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);
--
2.26.0
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