icnss: Add support of skiping QMI

Add support of skiping QMI messaging when ICNSS driver is initialized.
So that we can disable QMI communication between WLAN Host and FW when
QMI framework is not supported.

CRs-Fixed: 978953
Change-Id: I7a9a61c8aa11bd5c0f5f2effc487a2225e27011d
Signed-off-by: Yuanyuan Liu <yuanliu@codeaurora.org>

Documentation/devicetree/bindings/cnss/icnss.txt

@@ -14,6 +14,7 @@ Required properties:
   - qcom,wlan-msa-memory: MSA memory size
 
 Optional properties:
+  - qcom,skip-qmi: Boolean property to decide whether to use QMI or not
 
 Example:
 
@@ -35,4 +36,5 @@ Example:
 		   <0 140 0 /* CE10 */ >,
 		   <0 141 0 /* CE11 */ >;
         qcom,wlan-msa-memory = <0x200000>;
+        qcom,skip-qmi;
     };

drivers/soc/qcom/icnss.c

@@ -99,6 +99,7 @@ static struct {
 	u32 rf_pin_result;
 	struct icnss_mem_region_info
 		icnss_mem_region[QMI_WLFW_MAX_NUM_MEMORY_REGIONS_V01];
+	bool skip_qmi;
 } *penv;
 
 static int icnss_qmi_event_post(enum icnss_qmi_event_type type, void *data)
@@ -810,6 +811,9 @@ int icnss_register_driver(struct icnss_driver_ops *ops)
 	}
 	penv->ops = ops;
 
+	if (penv->skip_qmi)
+		penv->state |= ICNSS_FW_READY;
+
 	/* check for all conditions before invoking probe */
 	if (ICNSS_IS_FW_READY(penv->state) && penv->ops->probe) {
 		ret = penv->ops->probe(&pdev->dev);
@@ -1101,6 +1105,9 @@ skip:
 	if (ret)
 		pr_err("%s: Failed to send mode, ret = %d\n", __func__, ret);
 out:
+	if (penv->skip_qmi)
+		ret = 0;
+
 	return ret;
 }
 EXPORT_SYMBOL(icnss_wlan_enable);
@@ -1175,6 +1182,9 @@ static int icnss_probe(struct platform_device *pdev)
 		goto out;
 	}
 
+	penv->skip_qmi = of_property_read_bool(dev->of_node,
+					       "qcom,skip-qmi");
+
 	penv->qmi_event_wq = alloc_workqueue("icnss_qmi_event", 0, 0);
 	if (!penv->qmi_event_wq) {
 		pr_err("%s: workqueue creation failed\n", __func__);