From: Tero Kristo <[email protected]>
Client device node property firmware-name is now used to configure
firmware for the PRU instances. The default firmware is also
restored once releasing the PRU resource.
Signed-off-by: Suman Anna <[email protected]>
Signed-off-by: Tero Kristo <[email protected]>
Signed-off-by: Grzegorz Jaszczyk <[email protected]>
Signed-off-by: MD Danish Anwar <[email protected]>
Reviewed-by: Roger Quadros <[email protected]>
---
drivers/remoteproc/pru_rproc.c | 34 ++++++++++++++++++++++++++++++++++
1 file changed, 34 insertions(+)
diff --git a/drivers/remoteproc/pru_rproc.c b/drivers/remoteproc/pru_rproc.c
index f4a34cc6bcc6..39e05623a84e 100644
--- a/drivers/remoteproc/pru_rproc.c
+++ b/drivers/remoteproc/pru_rproc.c
@@ -172,6 +172,23 @@ void pru_control_set_reg(struct pru_rproc *pru, unsigned int reg,
spin_unlock_irqrestore(&pru->rmw_lock, flags);
}
+/**
+ * pru_rproc_set_firmware() - set firmware for a PRU core
+ * @rproc: the rproc instance of the PRU
+ * @fw_name: the new firmware name, or NULL if default is desired
+ *
+ * Return: 0 on success, or errno in error case.
+ */
+static int pru_rproc_set_firmware(struct rproc *rproc, const char *fw_name)
+{
+ struct pru_rproc *pru = rproc->priv;
+
+ if (!fw_name)
+ fw_name = pru->fw_name;
+
+ return rproc_set_firmware(rproc, fw_name);
+}
+
static struct rproc *__pru_rproc_get(struct device_node *np, int index)
{
struct rproc *rproc;
@@ -228,6 +245,7 @@ struct rproc *pru_rproc_get(struct device_node *np, int index,
struct rproc *rproc;
struct pru_rproc *pru;
struct device *dev;
+ const char *fw_name;
int ret;
rproc = __pru_rproc_get(np, index);
@@ -254,11 +272,25 @@ struct rproc *pru_rproc_get(struct device_node *np, int index,
if (pru_id)
*pru_id = pru->id;
+ ret = of_property_read_string_index(np, "firmware-name", index,
+ &fw_name);
+ if (!ret) {
+ ret = pru_rproc_set_firmware(rproc, fw_name);
+ if (ret) {
+ dev_err(dev, "failed to set firmware: %d\n", ret);
+ goto err;
+ }
+ }
+
return rproc;
err_no_rproc_handle:
rproc_put(rproc);
return ERR_PTR(ret);
+
+err:
+ pru_rproc_put(rproc);
+ return ERR_PTR(ret);
}
EXPORT_SYMBOL_GPL(pru_rproc_get);
@@ -278,6 +310,8 @@ void pru_rproc_put(struct rproc *rproc)
pru = rproc->priv;
+ pru_rproc_set_firmware(rproc, NULL);
+
mutex_lock(&pru->lock);
if (!pru->client_np) {
--
2.25.1