[PATCH v4 6/6] remoteproc: pru: add support for configuring GPMUX based on client setup
From: Puranjay Mohan
Date: Fri Jun 03 2022 - 08:16:04 EST
From: Tero Kristo <t-kristo@xxxxxx>
Client device node property ti,pruss-gp-mux-sel can now be used to
configure the GPMUX config value for PRU.
Signed-off-by: Tero Kristo <t-kristo@xxxxxx>
[s-anna@xxxxxx: simplify the pru id usage]
Signed-off-by: Suman Anna <s-anna@xxxxxx>
Signed-off-by: Puranjay Mohan <p-mohan@xxxxxx>
---
drivers/remoteproc/pru_rproc.c | 20 ++++++++++++++++++++
1 file changed, 20 insertions(+)
diff --git a/drivers/remoteproc/pru_rproc.c b/drivers/remoteproc/pru_rproc.c
index 2977eb50631b..b532069fe259 100644
--- a/drivers/remoteproc/pru_rproc.c
+++ b/drivers/remoteproc/pru_rproc.c
@@ -123,6 +123,7 @@ struct pru_private_data {
* @dbg_single_step: debug state variable to set PRU into single step mode
* @dbg_continuous: debug state variable to restore PRU execution mode
* @evt_count: number of mapped events
+ * @gpmux_save: saved value for gpmux config
*/
struct pru_rproc {
int id;
@@ -141,6 +142,7 @@ struct pru_rproc {
u32 dbg_single_step;
u32 dbg_continuous;
u8 evt_count;
+ u8 gpmux_save;
};
static inline u32 pru_control_read_reg(struct pru_rproc *pru, unsigned int reg)
@@ -250,6 +252,7 @@ struct rproc *pru_rproc_get(struct device_node *np, int index,
struct device *dev;
const char *fw_name;
int ret;
+ u32 mux;
try_module_get(THIS_MODULE);
@@ -273,6 +276,22 @@ struct rproc *pru_rproc_get(struct device_node *np, int index,
mutex_unlock(&pru->lock);
+ ret = pruss_cfg_get_gpmux(pru->pruss, pru->id, &pru->gpmux_save);
+ if (ret) {
+ dev_err(dev, "failed to get cfg gpmux: %d\n", ret);
+ goto err;
+ }
+
+ ret = of_property_read_u32_index(np, "ti,pruss-gp-mux-sel", index,
+ &mux);
+ if (!ret) {
+ ret = pruss_cfg_set_gpmux(pru->pruss, pru->id, mux);
+ if (ret) {
+ dev_err(dev, "failed to set cfg gpmux: %d\n", ret);
+ goto err;
+ }
+ }
+
if (pru_id)
*pru_id = pru->id;
@@ -310,6 +329,7 @@ void pru_rproc_put(struct rproc *rproc)
pru = rproc->priv;
+ pruss_cfg_set_gpmux(pru->pruss, pru->id, pru->gpmux_save);
pru_rproc_set_firmware(rproc, NULL);
mutex_lock(&pru->lock);
--
2.17.1