Merge branch 'ipa-fw-names'

Alex Elder says:

====================
net: ipa: allow different firmware names

Add the ability to define a "firmware-name" property in the IPA DT
node, specifying an alternate name to use for the firmware file.
Used only if the AP (Trust Zone) does early IPA initialization.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

Documentation/devicetree/bindings/net/qcom,ipa.yaml

@@ -125,6 +125,14 @@ properties:
       the firmware passed to Trust Zone for authentication.  Required
       when Trust Zone (not the modem) performs early initialization.
 
+  firmware-name:
+    $ref: /schemas/types.yaml#/definitions/string
+    description:
+      If present, name (or relative path) of the file within the
+      firmware search path containing the firmware image used when
+      initializing IPA hardware.  Optional, and only used when
+      Trust Zone performs early initialization.
+
 required:
   - compatible
   - iommus
@@ -134,12 +142,23 @@ required:
   - interconnects
   - qcom,smem-states
 
+# Either modem-init is present, or memory-region must be present.
 oneOf:
   - required:
       - modem-init
   - required:
       - memory-region
 
+# If memory-region is present, firmware-name may optionally be present.
+# But if modem-init is present, firmware-name must not be present.
+if:
+  required:
+    - modem-init
+then:
+  not:
+    required:
+      - firmware-name
+
 additionalProperties: false
 
 examples:

drivers/net/ipa/ipa_main.c

@@ -67,7 +67,7 @@
  */
 
 /* The name of the GSI firmware file relative to /lib/firmware */
-#define IPA_FWS_PATH		"ipa_fws.mdt"
+#define IPA_FW_PATH_DEFAULT	"ipa_fws.mdt"
 #define IPA_PAS_ID		15
 
 /* Shift of 19.2 MHz timestamp to achieve lower resolution timestamps */
@@ -517,6 +517,7 @@ static int ipa_firmware_load(struct device *dev)
 	struct device_node *node;
 	struct resource res;
 	phys_addr_t phys;
+	const char *path;
 	ssize_t size;
 	void *virt;
 	int ret;
@@ -534,9 +535,17 @@ static int ipa_firmware_load(struct device *dev)
 		return ret;
 	}
 
-	ret = request_firmware(&fw, IPA_FWS_PATH, dev);
+	/* Use name from DTB if specified; use default for *any* error */
+	ret = of_property_read_string(dev->of_node, "firmware-name", &path);
 	if (ret) {
-		dev_err(dev, "error %d requesting \"%s\"\n", ret, IPA_FWS_PATH);
+		dev_dbg(dev, "error %d getting \"firmware-name\" resource\n",
+			ret);
+		path = IPA_FW_PATH_DEFAULT;
+	}
+
+	ret = request_firmware(&fw, path, dev);
+	if (ret) {
+		dev_err(dev, "error %d requesting \"%s\"\n", ret, path);
 		return ret;
 	}
 
@@ -549,13 +558,11 @@ static int ipa_firmware_load(struct device *dev)
 		goto out_release_firmware;
 	}
 
-	ret = qcom_mdt_load(dev, fw, IPA_FWS_PATH, IPA_PAS_ID,
-			    virt, phys, size, NULL);
+	ret = qcom_mdt_load(dev, fw, path, IPA_PAS_ID, virt, phys, size, NULL);
 	if (ret)
-		dev_err(dev, "error %d loading \"%s\"\n", ret, IPA_FWS_PATH);
+		dev_err(dev, "error %d loading \"%s\"\n", ret, path);
 	else if ((ret = qcom_scm_pas_auth_and_reset(IPA_PAS_ID)))
-		dev_err(dev, "error %d authenticating \"%s\"\n", ret,
-			IPA_FWS_PATH);
+		dev_err(dev, "error %d authenticating \"%s\"\n", ret, path);
 
 	memunmap(virt);
 out_release_firmware: