From mboxrd@z Thu Jan 1 00:00:00 1970 From: maxime.ripard@free-electrons.com (Maxime Ripard) Date: Sun, 17 May 2015 16:51:46 +0200 Subject: [RFC 2/7] ARM: dts: sun9i: Add CCI-400 device nodes for A80 In-Reply-To: <1431583811-25780-3-git-send-email-wens@csie.org> References: <1431583811-25780-1-git-send-email-wens@csie.org> <1431583811-25780-3-git-send-email-wens@csie.org> Message-ID: <20150517145146.GK4004@lukather> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On Thu, May 14, 2015 at 02:10:06PM +0800, Chen-Yu Tsai wrote: > The A80 includes an ARM CCI-400 interconnect to support multi-cluster > CPU caches. > > Also add the default clock frequency for the CPUs. > > Signed-off-by: Chen-Yu Tsai > --- > arch/arm/boot/dts/sun9i-a80.dtsi | 46 ++++++++++++++++++++++++++++++++++++++++ > 1 file changed, 46 insertions(+) > > diff --git a/arch/arm/boot/dts/sun9i-a80.dtsi b/arch/arm/boot/dts/sun9i-a80.dtsi > index ca272e92b85d..200e712fbf0e 100644 > --- a/arch/arm/boot/dts/sun9i-a80.dtsi > +++ b/arch/arm/boot/dts/sun9i-a80.dtsi > @@ -58,48 +58,64 @@ > cpu0: cpu at 0 { > compatible = "arm,cortex-a7"; > device_type = "cpu"; > + cci-control-port = <&cci_control0>; > + clock-frequency = <12000000>; > reg = <0x0>; > }; > > cpu1: cpu at 1 { > compatible = "arm,cortex-a7"; > device_type = "cpu"; > + cci-control-port = <&cci_control0>; > + clock-frequency = <12000000>; > reg = <0x1>; > }; > > cpu2: cpu at 2 { > compatible = "arm,cortex-a7"; > device_type = "cpu"; > + cci-control-port = <&cci_control0>; > + clock-frequency = <12000000>; > reg = <0x2>; > }; > > cpu3: cpu at 3 { > compatible = "arm,cortex-a7"; > device_type = "cpu"; > + cci-control-port = <&cci_control0>; > + clock-frequency = <12000000>; > reg = <0x3>; > }; > > cpu4: cpu at 100 { > compatible = "arm,cortex-a15"; > device_type = "cpu"; > + cci-control-port = <&cci_control1>; > + clock-frequency = <9000000>; Isn't the clock frequency property is supposed to be the maximum frequency of that CPU in Linux? It looks odd that the A15 are clocked at a lower frequency than the A7... Maxime -- Maxime Ripard, Free Electrons Embedded Linux, Kernel and Android engineering http://free-electrons.com -------------- next part -------------- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size: 819 bytes Desc: Digital signature URL: