viafb: split clock and PLL code to an extra file

This patch is a huge move operation with some rename and introduces
an interface to still use the functions. This should be a step in
the right direction to reuse the code whenever possible but cleanly
separate code that differs on different platform and keeping the
complexity as low as possible.
pll_config was renamed to via_pll_config to keep the naming scheme.

Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>

1 files changed, 73 insertions, 0 deletions

diff --git a/drivers/video/via/via_clock.h b/drivers/video/via/via_clock.h
new file mode 100644
index 0000000..f213a7a
--- /dev/null
+++ b/drivers/video/via/via_clock.h
@@ -0,0 +1,73 @@
+/*
+ * Copyright 1998-2008 VIA Technologies, Inc. All Rights Reserved.
+ * Copyright 2001-2008 S3 Graphics, Inc. All Rights Reserved.
+ * Copyright 2011 Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
+ *
+ * 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;
+ * either version 2, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTIES OR REPRESENTATIONS; 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.,
+ * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+/*
+ * clock and PLL management functions
+ */
+
+#ifndef __VIA_CLOCK_H__
+#define __VIA_CLOCK_H__
+
+#include <linux/types.h>
+
+enum via_clksrc {
+	VIA_CLKSRC_X1 = 0,
+	VIA_CLKSRC_TVX1,
+	VIA_CLKSRC_TVPLL,
+	VIA_CLKSRC_DVP1TVCLKR,
+	VIA_CLKSRC_CAP0,
+	VIA_CLKSRC_CAP1,
+};
+
+struct via_pll_config {
+	u16 multiplier;
+	u8 divisor;
+	u8 rshift;
+};
+
+struct via_clock {
+	void (*set_primary_clock_state)(u8 state);
+	void (*set_primary_clock_source)(enum via_clksrc src, bool use_pll);
+	void (*set_primary_pll_state)(u8 state);
+	void (*set_primary_pll)(struct via_pll_config config);
+
+	void (*set_secondary_clock_state)(u8 state);
+	void (*set_secondary_clock_source)(enum via_clksrc src, bool use_pll);
+	void (*set_secondary_pll_state)(u8 state);
+	void (*set_secondary_pll)(struct via_pll_config config);
+};
+
+
+static inline u32 get_pll_internal_frequency(u32 ref_freq,
+	struct via_pll_config pll)
+{
+	return ref_freq / pll.divisor * pll.multiplier;
+}
+
+static inline u32 get_pll_output_frequency(u32 ref_freq,
+	struct via_pll_config pll)
+{
+	return get_pll_internal_frequency(ref_freq, pll) >> pll.rshift;
+}
+
+void via_clock_init(struct via_clock *clock, int gfx_chip);
+
+#endif /* __VIA_CLOCK_H__ */