[PATCH 14/16] remoteproc/pru: configure firmware based on client setup

Roger Quadros
2018-11-26T07:52:47Z

From: Tero Kristo <t-kristo@ti.com>

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: Tero Kristo <t-kristo@ti.com>
Reviewed-by: Roger Quadros <rogerq@ti.com>
Signed-off-by: Suman Anna <s-anna@ti.com>
---
drivers/remoteproc/pru_rproc.c | 27 +++++++++++++++++++++++++++
1 file changed, 27 insertions(+)

diff --git a/drivers/remoteproc/pru_rproc.c b/drivers/remoteproc/pru_rproc.c
index 9a08937..84f006b 100644
--- a/drivers/remoteproc/pru_rproc.c
+++ b/drivers/remoteproc/pru_rproc.c
@@ -132,6 +132,21 @@ 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
+ */
+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 device_node *rproc_np = NULL;
@@ -189,6 +204,7 @@ struct rproc *pru_rproc_get(struct device_node *np, int index)
struct device *dev;
int ret;
u32 mux;
+ const char *fw_name;

rproc = __pru_rproc_get(np, index);
if (IS_ERR(rproc))
@@ -225,6 +241,16 @@ struct rproc *pru_rproc_get(struct device_node *np, int index)
}
}

+ 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:
@@ -255,6 +281,7 @@ void pru_rproc_put(struct rproc *rproc)
if (!pru->client_np)
return;

+ pru_rproc_set_firmware(rproc, NULL);
pruss_cfg_set_gpmux(pru->pruss, pru->id, pru->gpmux_save);

mutex_lock(&pru->lock);