[PATCH v6] ARM: dts: Add HS400 support for exynos5420 and exynos5800

From: Seungwon Jeon <redacted>

HS400 timing values are added for SMDK5420, exynos5420-peach-pit
and exynos5800-peach-pi boards.
This also adds RCLK GPIO line, this gpio should be in pull-down
state.
This also enables HS400 on peach-pi and this updates the clock frequency
to 800MHz to be set as input clock to controller.

Signed-off-by: Seungwon Jeon <redacted>
Signed-off-by: Alim Akhtar <alim.akhtar@samsung.com>
[Alim: addressed review comments]
Acked-by: Jaehoon Chung <jh80.chung@samsung.com>
---
Changes in V6:
        Rebased on kukjin's for-next branch[0]
        (commit: 77105c8 Merge branch 'v4.0-samsung-fixes-2' into for-next)

[0]: git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung.git

 arch/arm/boot/dts/exynos5420-peach-pit.dts | 4 +++-
 arch/arm/boot/dts/exynos5420-pinctrl.dtsi  | 7 +++++++
 arch/arm/boot/dts/exynos5420-smdk5420.dts  | 4 +++-
 arch/arm/boot/dts/exynos5800-peach-pi.dts  | 7 +++++--
 4 files changed, 18 insertions(+), 4 deletions(-)

diff --git a/arch/arm/boot/dts/exynos5420-peach-pit.dts b/arch/arm/boot/dts/exynos5420-peach-pit.dts
index d0ee55f..e158861 100644
--- a/arch/arm/boot/dts/exynos5420-peach-pit.dts
+++ b/arch/arm/boot/dts/exynos5420-peach-pit.dts

@@ -695,8 +695,10 @@
        samsung,dw-mshc-ciu-div = <3>;
        samsung,dw-mshc-sdr-timing = <0 4>;
        samsung,dw-mshc-ddr-timing = <0 2>;
+       samsung,dw-mshc-hs400-timing = <0 2>;
+       samsung,read-strobe-delay = <90>;
        pinctrl-names = "default";
-       pinctrl-0 = <&sd0_clk &sd0_cmd &sd0_bus1 &sd0_bus4 &sd0_bus8>;
+       pinctrl-0 = <&sd0_clk &sd0_cmd &sd0_bus4 &sd0_bus8 &sd0_rclk>;