rtd2132: Add driver for Realtek RTD2132 LVDS bridge

This driver allows the mainboard to enable spread spectrum
clocking at 0.5%, 1.0%, and 1.5% with devicetree settings.

Change-Id: I59c61e67aa8e951fd9904ad951deb6d0ba29669e
Signed-off-by: Duncan Laurie <dlaurie@chromium.org>
Reviewed-on: https://gerrit.chromium.org/gerrit/61894
Reviewed-on: http://review.coreboot.org/4365
Reviewed-by: Patrick Georgi <patrick@georgi-clan.de>
Tested-by: build bot (Jenkins)

1 files changed, 29 insertions, 0 deletions

diff --git a/src/drivers/i2c/rtd2132/chip.h b/src/drivers/i2c/rtd2132/chip.h
new file mode 100644
index 0000000000..34ae91a3fe
--- /dev/null
+++ b/src/drivers/i2c/rtd2132/chip.h
@@ -0,0 +1,29 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2013 Google Inc.  All Rights Reserved.
+ *
+ * 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.
+ *
+ * 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
+ */
+
+struct drivers_i2c_rtd2132_config {
+	/*
+	 * LVDS Spread Spectrum Clock
+	 *  0x00 = DISABLED
+	 *  0x05 = 0.5%
+	 *  0x10 = 1.0%
+	 *  0x15 = 1.5%
+	 */
+	u8 sscg_percent;
+};