[media] v4l: Aptina-style sensor PLL support

Add a generic helper function to compute PLL parameters for PLL found in
several Aptina sensors.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Sakari Ailus <sakari.ailus@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 56 insertions, 0 deletions

diff --git a/drivers/media/video/aptina-pll.h b/drivers/media/video/aptina-pll.h
new file mode 100644
index 000000000000..b370e341e75d
--- /dev/null
+++ b/drivers/media/video/aptina-pll.h
@@ -0,0 +1,56 @@
+/*
+ * Aptina Sensor PLL Configuration
+ *
+ * Copyright (C) 2012 Laurent Pinchart <laurent.pinchart@ideasonboard.com>
+ *
+ * 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 __APTINA_PLL_H
+#define __APTINA_PLL_H
+
+struct aptina_pll {
+        unsigned int ext_clock;
+        unsigned int pix_clock;
+
+        unsigned int n;
+        unsigned int m;
+        unsigned int p1;
+};
+
+struct aptina_pll_limits {
+        unsigned int ext_clock_min;
+        unsigned int ext_clock_max;
+        unsigned int int_clock_min;
+        unsigned int int_clock_max;
+        unsigned int out_clock_min;
+        unsigned int out_clock_max;
+        unsigned int pix_clock_max;
+
+        unsigned int n_min;
+        unsigned int n_max;
+        unsigned int m_min;
+        unsigned int m_max;
+        unsigned int p1_min;
+        unsigned int p1_max;
+};
+
+struct device;
+
+int aptina_pll_calculate(struct device *dev,
+                         const struct aptina_pll_limits *limits,
+                         struct aptina_pll *pll);
+
+#endif /* __APTINA_PLL_H */