1 files changed, 52 insertions, 0 deletions
diff --git a/arch/arm/plat-omap/include/plat/mcasp.h b/arch/arm/plat-omap/include/plat/mcasp.h
new file mode 100644
index 0000000..aead0a0
--- /dev/null
+++ b/arch/arm/plat-omap/include/plat/mcasp.h
@@ -0,0 +1,52 @@
+/*
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+ * 02110-1301 USA
+ *
+ */
+
+#ifndef __OMAP_PLAT_MCASP_H__
+#define __OMAP_PLAT_MCASP_H__
+
+#include <linux/platform_device.h>
+
+/* The SPDIF bit clock is derived from the McASP functional clock.
+ * The McASP has two programmable clock dividers (aclkxdiv and
+ * ahclkxdiv) that are configured via the registers MCASP_ACLKXCTL
+ * and MCASP_AHCLKXCTL. For SPDIF the bit clock frequency should be
+ * 128 * sample rate freq. Therefore...
+ *
+ * McASP functional clock = aclkxdiv * ahclkxdiv * 128 * sample rate
+ *
+ * For each sample rate supported the user must define the aclkxdiv
+ * and ahclkxdiv values that are passed to the McASP driver via the
+ * following structure. The McASP functional clock frequency can be
+ * configured also, and this is pass to the McASP driver via the
+ * omap_mcasp_platform_data structure below.
+ */
+struct omap_mcasp_configs {
+	unsigned int sampling_rate;
+	u16 aclkxdiv;
+	u16 ahclkxdiv;
+};
+
+struct omap_mcasp_platform_data {
+	unsigned long mcasp_fclk_rate;
+	struct omap_mcasp_configs *mcasp_configs;
+	unsigned int num_configs;
+};
+
+void omap_init_mcasp(struct omap_mcasp_platform_data *pdata);
+
+#endif