linux-kernel - [PATCH v2] mailbox: pcc: Add PCC request and free channel declarations

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Message-Id: <1466111378-4390-1-git-send-email-hotran@apm.com>
Date:	Thu, 16 Jun 2016 14:09:38 -0700
From:	Hoan Tran <hotran@....com>
To:	Ashwin Chaugule <ashwin.chaugule@...aro.org>,
	Jassi Brar <jassisinghbrar@...il.com>,
	"Rafael J. Wysocki" <rjw@...ysocki.net>,
	Len Brown <lenb@...nel.org>, pprakash@...eaurora.org
Cc:	Robert Moore <robert.moore@...el.com>,
	Lv Zheng <lv.zheng@...el.com>, linux-acpi@...r.kernel.org,
	linux-kernel@...r.kernel.org, devel@...ica.org, lho@....com,
	Duc Dang <dhdang@....com>, Hoan Tran <hotran@....com>
Subject: [PATCH v2] mailbox: pcc: Add PCC request and free channel declarations

Exports pcc_mbox_request_channel() and pcc_mbox_free_channel()
declarations into a pcc.h header file.

v2
 * Introduce pcc.h header file for pcc client methods

v1
 * Initial

Signed-off-by: Hoan Tran <hotran@....com>
---
 include/acpi/cppc_acpi.h |  7 +------
 include/acpi/pcc.h       | 29 +++++++++++++++++++++++++++++
 2 files changed, 30 insertions(+), 6 deletions(-)
 create mode 100644 include/acpi/pcc.h

diff --git a/include/acpi/cppc_acpi.h b/include/acpi/cppc_acpi.h
index 259683a..ab1da43 100644
--- a/include/acpi/cppc_acpi.h
+++ b/include/acpi/cppc_acpi.h
@@ -15,10 +15,9 @@
 #define _CPPC_ACPI_H
 
 #include <linux/acpi.h>
-#include <linux/mailbox_controller.h>
-#include <linux/mailbox_client.h>
 #include <linux/types.h>
 
+#include <acpi/pcc.h>
 #include <acpi/processor.h>
 
 /* Only support CPPCv2 for now. */
@@ -131,8 +130,4 @@ extern int cppc_set_perf(int cpu, struct cppc_perf_ctrls *perf_ctrls);
 extern int cppc_get_perf_caps(int cpu, struct cppc_perf_caps *caps);
 extern int acpi_get_psd_map(struct cpudata **);
 
-/* Methods to interact with the PCC mailbox controller. */
-extern struct mbox_chan *
-	pcc_mbox_request_channel(struct mbox_client *, unsigned int);
-
 #endif /* _CPPC_ACPI_H*/
diff --git a/include/acpi/pcc.h b/include/acpi/pcc.h
new file mode 100644
index 0000000..17a940a
--- /dev/null
+++ b/include/acpi/pcc.h
@@ -0,0 +1,29 @@
+/*
+ * PCC (Platform Communications Channel) methods
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; version 2
+ * of the License.
+ */
+
+#ifndef _PCC_H
+#define _PCC_H
+
+#include <linux/mailbox_controller.h>
+#include <linux/mailbox_client.h>
+
+#ifdef CONFIG_PCC
+extern struct mbox_chan *pcc_mbox_request_channel(struct mbox_client *cl,
+						  int subspace_id);
+extern void pcc_mbox_free_channel(struct mbox_chan *chan);
+#else
+static inline struct mbox_chan *pcc_mbox_request_channel(struct mbox_client *cl,
+							 int subspace_id)
+{
+	return NULL;
+}
+static inline void pcc_mbox_free_channel(struct mbox_chan *chan) { }
+#endif
+
+#endif /* _PCC_H */
-- 
1.9.1