firmware: zynqmp: Change loadable config object from APU_0 to OCM_BANK_0

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@amd.com>
Signed-off-by: Michal Simek <michal.simek@amd.com>
Link: https://lore.kernel.org/r/2784018844ba4afced0e3edff76bdbfe532f517d.1664523444.git.michal.simek@amd.com

diff --git a/drivers/firmware/firmware-zynqmp.c b/drivers/firmware/firmware-zynqmp.c
index d8e0d79c5744ea19fa0050e1a12e72bdbca7e299..dc8e3ad2b9de17513fff6fbbdccc38aaa51f4123 100644 (file)
--- a/drivers/firmware/firmware-zynqmp.c
+++ b/drivers/firmware/firmware-zynqmp.c
@@ -82,7 +82,7 @@ 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;
@@ -235,6 +235,8 @@ 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)
 {
@@ -249,7 +251,10 @@ 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;
        }
 
@@ -294,7 +299,7 @@ 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;
 };