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| author | Thomas Petazzoni <thomas.petazzoni@free-electrons.com> | 2014-04-18 09:41:46 +0200 |
|---|---|---|
| committer | Jason Cooper <jason@lakedaemon.net> | 2014-04-26 02:34:33 +0200 |
| commit | 64939dc5bf264c34d02b3c51296e10730065f5d1 (patch) | |
| tree | 062b87a22042a74920db5b6088af7d1c13a1f22a /arch | |
| parent | ARM: mvebu: add Device Tree description of AHCI interfaces on Armada 38x (diff) | |
| download | linux-64939dc5bf264c34d02b3c51296e10730065f5d1.tar.xz linux-64939dc5bf264c34d02b3c51296e10730065f5d1.zip | |
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')
| -rw-r--r-- | arch/arm/boot/dts/armada-370-xp.dtsi | 2 | ||||
| -rw-r--r-- | arch/arm/boot/dts/armada-375.dtsi | 2 | ||||
| -rw-r--r-- | arch/arm/boot/dts/armada-38x.dtsi | 2 | ||||
| -rw-r--r-- | arch/arm/boot/dts/armada-xp.dtsi | 2 |
4 files changed, 8 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"; }; diff --git a/arch/arm/boot/dts/armada-375.dtsi b/arch/arm/boot/dts/armada-375.dtsi index a7e0d543dff1..6a3b7410817e 100644 --- a/arch/arm/boot/dts/armada-375.dtsi +++ b/arch/arm/boot/dts/armada-375.dtsi @@ -201,6 +201,7 @@ reg-shift = <2>; interrupts = <GIC_SPI 12 IRQ_TYPE_LEVEL_HIGH>; reg-io-width = <1>; + clocks = <&coreclk 0>; status = "disabled"; }; @@ -210,6 +211,7 @@ reg-shift = <2>; interrupts = <GIC_SPI 13 IRQ_TYPE_LEVEL_HIGH>; reg-io-width = <1>; + clocks = <&coreclk 0>; status = "disabled"; }; diff --git a/arch/arm/boot/dts/armada-38x.dtsi b/arch/arm/boot/dts/armada-38x.dtsi index 7c3f3ddd9096..0796cde504e7 100644 --- a/arch/arm/boot/dts/armada-38x.dtsi +++ b/arch/arm/boot/dts/armada-38x.dtsi @@ -179,6 +179,7 @@ reg-shift = <2>; interrupts = <GIC_SPI 12 IRQ_TYPE_LEVEL_HIGH>; reg-io-width = <1>; + clocks = <&coreclk 0>; status = "disabled"; }; @@ -188,6 +189,7 @@ reg-shift = <2>; interrupts = <GIC_SPI 13 IRQ_TYPE_LEVEL_HIGH>; reg-io-width = <1>; + clocks = <&coreclk 0>; status = "disabled"; }; diff --git a/arch/arm/boot/dts/armada-xp.dtsi b/arch/arm/boot/dts/armada-xp.dtsi index 0a7dff6519ce..5902e8359c91 100644 --- a/arch/arm/boot/dts/armada-xp.dtsi +++ b/arch/arm/boot/dts/armada-xp.dtsi @@ -58,6 +58,7 @@ reg-shift = <2>; interrupts = <43>; reg-io-width = <1>; + clocks = <&coreclk 0>; status = "disabled"; }; serial@12300 { @@ -66,6 +67,7 @@ reg-shift = <2>; interrupts = <44>; reg-io-width = <1>; + clocks = <&coreclk 0>; status = "disabled"; }; |