rockchip: rk3399: enable sdhci clk for emmc

If booting from sdcard/usb, kernel can't recognize the
/dev/mmcblk0.
Before kernel find it's root cause, we add this workaround
patch to enable clk for emmc.

BRANCH=none
BUG=chrome-os-partner:52873
TEST=boot from sdcard and check the /dev/mmcblk0 exists

Change-Id: Ie36cc6fdbc24db8c30984c02ccfe2f8aaaf30cd2
Signed-off-by: Martin Roth <martinroth@google.com>
Original-Commit-Id: 39b87ec3c73d6f56efc8c3f52b7ed759e548ee85
Original-Change-Id: I88a9cc2e3ea5a56aadfdbd94ef910daaf92a7eb7
Original-Signed-off-by: Shunqian Zheng <zhengsq@rock-chips.com>
Original-Reviewed-on: https://chromium-review.googlesource.com/341632
Original-Commit-Ready: Vadim Bendebury <vbendeb@chromium.org>
Original-Tested-by: Vadim Bendebury <vbendeb@chromium.org>
Original-Reviewed-by: Vadim Bendebury <vbendeb@chromium.org>
Reviewed-on: https://review.coreboot.org/14856
Tested-by: build bot (Jenkins)
Reviewed-by: Vadim Bendebury <vbendeb@chromium.org>

1 files changed, 16 insertions, 0 deletions

diff --git a/src/soc/rockchip/rk3399/include/soc/emmc.h b/src/soc/rockchip/rk3399/include/soc/emmc.h
new file mode 100644
index 0000000000..0d29d9e138
--- /dev/null
+++ b/src/soc/rockchip/rk3399/include/soc/emmc.h
@@ -0,0 +1,16 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2016 Rockchip Inc.
+ *
+ * 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.
+ */
+
+void enable_emmc_clk(void);