net: ipa: set up the microcontroller earlier

Initializing up the IPA-resident microcontroller requires the IPA
clock, and sets up two IPA interrupt handlers, but this does not
require GSI access.  The interrupt handlers also require the clock
to be enabled, and require the IPA memory regions to be configured,
but neither requires GSI access.  As a result, the microcontroller
can be initialized during the "config" rather than "setup" phase of
IPA initialization.

Initialize the microcontroller in ipa_config() rather than
ipa_setup(), and rename the called function ipa_uc_config().
Do the inverse in ipa_deconfig() rather than ipa_teardown(),
and rename the function for that case ipa_uc_deconfig().
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ipa/ipa_main.c

@@ -127,11 +127,9 @@ int ipa_setup(struct ipa *ipa)
 	ipa_interrupt_add(ipa->interrupt, IPA_IRQ_TX_SUSPEND,
 			  ipa_suspend_handler);
 
-	ipa_uc_setup(ipa);
-
 	ret = device_init_wakeup(dev, true);
 	if (ret)
-		goto err_uc_teardown;
+		goto err_interrupt_remove;
 
 	ipa_endpoint_setup(ipa);
 
@@ -180,8 +178,7 @@ int ipa_setup(struct ipa *ipa)
 err_endpoint_teardown:
 	ipa_endpoint_teardown(ipa);
 	(void)device_init_wakeup(dev, false);
-err_uc_teardown:
-	ipa_uc_teardown(ipa);
+err_interrupt_remove:
 	ipa_interrupt_remove(ipa->interrupt, IPA_IRQ_TX_SUSPEND);
 	gsi_teardown(&ipa->gsi);
 
@@ -205,7 +202,6 @@ static void ipa_teardown(struct ipa *ipa)
 	ipa_endpoint_disable_one(command_endpoint);
 	ipa_endpoint_teardown(ipa);
 	(void)device_init_wakeup(&ipa->pdev->dev, false);
-	ipa_uc_teardown(ipa);
 	ipa_interrupt_remove(ipa->interrupt, IPA_IRQ_TX_SUSPEND);
 	gsi_teardown(&ipa->gsi);
 }
@@ -471,6 +467,8 @@ static int ipa_config(struct ipa *ipa, const struct ipa_data *data)
 		goto err_mem_deconfig;
 	}
 
+	ipa_uc_config(ipa);
+
 	ret = ipa_endpoint_config(ipa);
 	if (ret)
 		goto err_interrupt_deconfig;
@@ -491,6 +489,7 @@ static int ipa_config(struct ipa *ipa, const struct ipa_data *data)
 err_endpoint_deconfig:
 	ipa_endpoint_deconfig(ipa);
 err_interrupt_deconfig:
+	ipa_uc_deconfig(ipa);
 	ipa_interrupt_deconfig(ipa->interrupt);
 	ipa->interrupt = NULL;
 err_mem_deconfig:
@@ -510,6 +509,7 @@ static void ipa_deconfig(struct ipa *ipa)
 {
 	ipa_modem_deconfig(ipa);
 	ipa_endpoint_deconfig(ipa);
+	ipa_uc_deconfig(ipa);
 	ipa_interrupt_deconfig(ipa->interrupt);
 	ipa->interrupt = NULL;
 	ipa_mem_deconfig(ipa);

drivers/net/ipa/ipa_uc.c

@@ -162,8 +162,8 @@ static void ipa_uc_response_hdlr(struct ipa *ipa, enum ipa_irq_id irq_id)
 	}
 }
 
-/* ipa_uc_setup() - Set up the microcontroller */
-void ipa_uc_setup(struct ipa *ipa)
+/* Configure the IPA microcontroller subsystem */
+void ipa_uc_config(struct ipa *ipa)
 {
 	/* The microcontroller needs the IPA clock running until it has
 	 * completed its initialization.  It signals this by sending an
@@ -180,8 +180,8 @@ void ipa_uc_setup(struct ipa *ipa)
 	ipa_interrupt_add(ipa->interrupt, IPA_IRQ_UC_1, ipa_uc_response_hdlr);
 }
 
-/* Inverse of ipa_uc_setup() */
-void ipa_uc_teardown(struct ipa *ipa)
+/* Inverse of ipa_uc_config() */
+void ipa_uc_deconfig(struct ipa *ipa)
 {
 	ipa_interrupt_remove(ipa->interrupt, IPA_IRQ_UC_1);
 	ipa_interrupt_remove(ipa->interrupt, IPA_IRQ_UC_0);

drivers/net/ipa/ipa_uc.h

@@ -9,16 +9,16 @@
 struct ipa;
 
 /**
- * ipa_uc_setup() - set up the IPA microcontroller subsystem
+ * ipa_uc_config() - Configure the IPA microcontroller subsystem
  * @ipa:	IPA pointer
  */
-void ipa_uc_setup(struct ipa *ipa);
+void ipa_uc_config(struct ipa *ipa);
 
 /**
- * ipa_uc_teardown() - inverse of ipa_uc_setup()
+ * ipa_uc_deconfig() - Inverse of ipa_uc_config()
  * @ipa:	IPA pointer
  */
-void ipa_uc_teardown(struct ipa *ipa);
+void ipa_uc_deconfig(struct ipa *ipa);
 
 /**
  * ipa_uc_panic_notifier()