[PATCH] firmware: zynqmp: Change loadable config object from APU_0 to OCM_BANK_0

[Michal Simek]

From: Ashok Reddy Soma <ashok.reddy.soma at amd.com>

To check dynamic loading of config object, currently APU_0 is used.
Suggestion from pmwfw team is to load OCM_BANK_0 and check for
XST_PM_NO_ACCESS error only to skip future config objects. Other errors
should not be considered for skipping. Change from NODE_APU_0 to
NODE_OCM_BANK_0 and check for XST_PM_NO_ACCESS to skip future config
objects.

Add ":  " to printf statement when there is no permission to load config
object, to align with PMUFW version print.

Update kernel doc for return value for zynqmp_pmufw_load_config_object().

Signed-off-by: Ashok Reddy Soma <ashok.reddy.soma at amd.com>
Signed-off-by: Michal Simek <michal.simek at amd.com>
---

 drivers/firmware/firmware-zynqmp.c | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/drivers/firmware/firmware-zynqmp.c b/drivers/firmware/firmware-zynqmp.c
index a9ed3e7d8b15..d52706c82a66 100644
--- a/drivers/firmware/firmware-zynqmp.c
+++ b/drivers/firmware/firmware-zynqmp.c
@@ -101,7 +101,7 @@ int zynqmp_pmufw_node(u32 id)
 	ret = zynqmp_pmufw_load_config_object(xpm_configobject,
 					      sizeof(xpm_configobject));
 
-	if (ret && id == NODE_APU_0)
+	if (ret == XST_PM_NO_ACCESS && id == NODE_OCM_BANK_0)
 		skip_config = true;
 
 	return 0;
@@ -254,6 +254,8 @@ int zynqmp_pm_is_function_supported(const u32 api_id, const u32 id)
  *
  * @cfg_obj: Pointer to the configuration object
  * @size:    Size of @cfg_obj in bytes
+ * Return:   0 on success otherwise negative errno. If the config object
+ *           is not loadable returns positive errno XST_PM_NO_ACCESS(2002)
  */
 int zynqmp_pmufw_load_config_object(const void *cfg_obj, size_t size)
 {
@@ -268,7 +270,10 @@ int zynqmp_pmufw_load_config_object(const void *cfg_obj, size_t size)
 	err = xilinx_pm_request(PM_SET_CONFIGURATION, (u32)(u64)cfg_obj, 0, 0,
 				0, ret_payload);
 	if (err == XST_PM_NO_ACCESS) {
-		printf("PMUFW no permission to change config object\n");
+		if (((u32 *)cfg_obj)[NODE_ID_LOCATION] == NODE_OCM_BANK_0) {
+			printf("PMUFW:  No permission to change config object\n");
+			return err;
+		}
 		return -EACCES;
 	}
 
@@ -313,7 +318,7 @@ static int zynqmp_power_probe(struct udevice *dev)
 	       ret & ZYNQMP_PM_VERSION_MINOR_MASK);
 
 	if (IS_ENABLED(CONFIG_ARCH_ZYNQMP))
-		zynqmp_pmufw_node(NODE_APU_0);
+		zynqmp_pmufw_node(NODE_OCM_BANK_0);
 
 	return 0;
 };
-- 
2.36.1