Add support for the i.MX53 QSB2.6.35.3-mx53-early-201103141049

This patch seems to have originated from the 11.01.00 release
from Freescale, which is no longer available except through the
gitweb interface from Freescale.

http://opensource.freescale.com/git?p=imx/linux-2.6-imx.git;a=commit;h=27fdf7bae11978d21e8aba09bb635f49b07edd4a

1 files changed, 39 insertions, 0 deletions

diff --git a/drivers/i2c-slave/i2c_slave_ring_buffer.h b/drivers/i2c-slave/i2c_slave_ring_buffer.h
new file mode 100644
index 000000000000..32fc21b618ed
--- /dev/null
+++ b/drivers/i2c-slave/i2c_slave_ring_buffer.h
@@ -0,0 +1,39 @@
+#ifndef __BUFFER_MANAGER_H__
+#define __BUFFER_MANAGER_H__
+/*
+ * Copyright 2007-2010 Freescale Semiconductor, Inc. All Rights Reserved.
+ */
+
+/*
+ * The code contained herein is licensed under the GNU General Public
+ * License. You may obtain a copy of the GNU General Public License
+ * Version 2 or later at the following locations:
+ *
+ * http://www.opensource.org/licenses/gpl-license.html
+ * http://www.gnu.org/copyleft/gpl.html
+ */
+#include <linux/types.h>
+#include <linux/spinlock.h>
+
+typedef struct i2c_slave_ring_buffer {
+	int start;
+	int end;
+	int total;
+	bool full;
+	char *buffer;
+	spinlock_t lock;
+} i2c_slave_ring_buffer_t;
+
+i2c_slave_ring_buffer_t *i2c_slave_rb_alloc(int size);
+
+void i2c_slave_rb_release(i2c_slave_ring_buffer_t *ring);
+
+int i2c_slave_rb_produce(i2c_slave_ring_buffer_t *ring, int num, char *data);
+
+int i2c_slave_rb_consume(i2c_slave_ring_buffer_t *ring, int num, char *data);
+
+int i2c_slave_rb_num(i2c_slave_ring_buffer_t *ring);
+
+void i2c_slave_rb_clear(i2c_slave_ring_buffer_t *ring);
+
+#endif