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authorThomas Petazzoni <thomas.petazzoni@free-electrons.com>2014-04-18 11:41:46 +0400
committerJason Cooper <jason@lakedaemon.net>2014-04-26 04:34:33 +0400
commit64939dc5bf264c34d02b3c51296e10730065f5d1 (patch)
tree062b87a22042a74920db5b6088af7d1c13a1f22a /arch/arm/boot/dts/armada-370-xp.dtsi
parentd175b6e494298b84f383aaec8c16215d17bdbe28 (diff)
downloadlinux-64939dc5bf264c34d02b3c51296e10730065f5d1.tar.xz
ARM: mvebu: use clocks property for serial ports
Back when the Armada 370 and Armada XP initial support was introduced, the only way to pass the clock frequency to the of_serial driver was through a clock-frequency Device Tree property. Thanks to 0bbeb3c3e84bc963d1c66661e082d207023b0e5c ('of serial port driver - add clk_get_rate() support'), it is possible to use the standard 'clocks' DT property to reference the clock used for a particular UART controller. This clock is then used by the of_serial driver to retrieve the clock rate. This commit modifies the SoC-level Device Tree files of Armada 370, Armada XP, Armada 375 and Armada 38x to use this possibility. Since there is no gatable clock for the UART controllers, we simply reference the TCLK, which is the main SoC clock for the peripherals. Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> Acked-by: Gregory CLEMENT <gregory.clement@free-electrons.com> Link: https://lkml.kernel.org/r/1397806908-7550-4-git-send-email-thomas.petazzoni@free-electrons.com Signed-off-by: Jason Cooper <jason@lakedaemon.net>
Diffstat (limited to 'arch/arm/boot/dts/armada-370-xp.dtsi')
-rw-r--r--arch/arm/boot/dts/armada-370-xp.dtsi2
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/arm/boot/dts/armada-370-xp.dtsi b/arch/arm/boot/dts/armada-370-xp.dtsi
index 10d778605ea7..46aaee7f8df2 100644
--- a/arch/arm/boot/dts/armada-370-xp.dtsi
+++ b/arch/arm/boot/dts/armada-370-xp.dtsi
@@ -157,6 +157,7 @@
reg-shift = <2>;
interrupts = <41>;
reg-io-width = <1>;
+ clocks = <&coreclk 0>;
status = "disabled";
};
serial@12100 {
@@ -165,6 +166,7 @@
reg-shift = <2>;
interrupts = <42>;
reg-io-width = <1>;
+ clocks = <&coreclk 0>;
status = "disabled";
};