From: Tang Yuantian <yuantian.tang@xxxxxxxxxxxxx> The following SoCs will be affected: p2041, p3041, p4080, p5020, p5040 Signed-off-by: Tang Yuantian <Yuantian.Tang@xxxxxxxxxxxxx> Signed-off-by: Li Yang <leoli@xxxxxxxxxxxxx> --- * resend for review arch/powerpc/boot/dts/fsl/p2041si-post.dtsi | 62 ++++++++++++++++- arch/powerpc/boot/dts/fsl/p2041si-pre.dtsi | 4 ++ arch/powerpc/boot/dts/fsl/p3041si-post.dtsi | 62 ++++++++++++++++- arch/powerpc/boot/dts/fsl/p3041si-pre.dtsi | 4 ++ arch/powerpc/boot/dts/fsl/p4080si-post.dtsi | 100 +++++++++++++++++++++++++++- arch/powerpc/boot/dts/fsl/p4080si-pre.dtsi | 8 +++ arch/powerpc/boot/dts/fsl/p5020si-post.dtsi | 42 +++++++++++- arch/powerpc/boot/dts/fsl/p5020si-pre.dtsi | 2 + arch/powerpc/boot/dts/fsl/p5040si-post.dtsi | 54 ++++++++++++++- arch/powerpc/boot/dts/fsl/p5040si-pre.dtsi | 4 ++ 10 files changed, 337 insertions(+), 5 deletions(-) diff --git a/arch/powerpc/boot/dts/fsl/p2041si-post.dtsi b/arch/powerpc/boot/dts/fsl/p2041si-post.dtsi index 69ac1ac..d83de62 100644 --- a/arch/powerpc/boot/dts/fsl/p2041si-post.dtsi +++ b/arch/powerpc/boot/dts/fsl/p2041si-post.dtsi @@ -305,9 +305,69 @@ }; clockgen: global-utilities@e1000 { - compatible = "fsl,p2041-clockgen", "fsl,qoriq-clockgen-1.0"; + compatible = "fsl,p2041-clockgen", "fsl,qoriq-clockgen-1.0", + "fixed-clock"; reg = <0xe1000 0x1000>; clock-frequency = <0>; + clock-output-names = "sysclk"; + #clock-cells = <0>; + + #address-cells = <1>; + #size-cells = <0>; + pll0: pll0@800 { + #clock-cells = <1>; + reg = <0x800>; + compatible = "fsl,core-pll-clock"; + clocks = <&clockgen>; + clock-output-names = "pll0", "pll0-div2", "pll0-div4"; + }; + pll1: pll1@820 { + #clock-cells = <1>; + reg = <0x820>; + compatible = "fsl,core-pll-clock"; + clocks = <&clockgen>; + clock-output-names = "pll1", "pll1-div2", "pll1-div4"; + }; + mux0: mux0@0 { + #clock-cells = <0>; + reg = <0x0>; + compatible = "fsl,core-mux-clock"; + clocks = <&pll0 0>, <&pll0 1>, <&pll0 2>, + <&pll1 0>, <&pll1 1>, <&pll1 2>; + clock-names = "pll0_0", "pll0_1", "pll0_2", + "pll1_0", "pll1_1", "pll1_2"; + clock-output-names = "cmux0"; + }; + mux1: mux1@20 { + #clock-cells = <0>; + reg = <0x20>; + compatible = "fsl,core-mux-clock"; + clocks = <&pll0 0>, <&pll0 1>, <&pll0 2>, + <&pll1 0>, <&pll1 1>, <&pll1 2>; + clock-names = "pll0_0", "pll0_1", "pll0_2", + "pll1_0", "pll1_1", "pll1_2"; + clock-output-names = "cmux1"; + }; + mux2: mux2@40 { + #clock-cells = <0>; + reg = <0x40>; + compatible = "fsl,core-mux-clock"; + clocks = <&pll0 0>, <&pll0 1>, <&pll0 2>, + <&pll1 0>, <&pll1 1>, <&pll1 2>; + clock-names = "pll0_0", "pll0_1", "pll0_2", + "pll1_0", "pll1_1", "pll1_2"; + clock-output-names = "cmux2"; + }; + mux3: mux3@60 { + #clock-cells = <0>; + reg = <0x60>; + compatible = "fsl,core-mux-clock"; + clocks = <&pll0 0>, <&pll0 1>, <&pll0 2>, + <&pll1 0>, <&pll1 1>, <&pll1 2>; + clock-names = "pll0_0", "pll0_1", "pll0_2", + "pll1_0", "pll1_1", "pll1_2"; + clock-output-names = "cmux3"; + }; }; rcpm: global-utilities@e2000 { diff --git a/arch/powerpc/boot/dts/fsl/p2041si-pre.dtsi b/arch/powerpc/boot/dts/fsl/p2041si-pre.dtsi index 7a2697d..22f3b14 100644 --- a/arch/powerpc/boot/dts/fsl/p2041si-pre.dtsi +++ b/arch/powerpc/boot/dts/fsl/p2041si-pre.dtsi @@ -81,6 +81,7 @@ cpu0: PowerPC,e500mc@0 { device_type = "cpu"; reg = <0>; + clocks = <&mux0>; next-level-cache = <&L2_0>; L2_0: l2-cache { next-level-cache = <&cpc>; @@ -89,6 +90,7 @@ cpu1: PowerPC,e500mc@1 { device_type = "cpu"; reg = <1>; + clocks = <&mux1>; next-level-cache = <&L2_1>; L2_1: l2-cache { next-level-cache = <&cpc>; @@ -97,6 +99,7 @@ cpu2: PowerPC,e500mc@2 { device_type = "cpu"; reg = <2>; + clocks = <&mux2>; next-level-cache = <&L2_2>; L2_2: l2-cache { next-level-cache = <&cpc>; @@ -105,6 +108,7 @@ cpu3: PowerPC,e500mc@3 { device_type = "cpu"; reg = <3>; + clocks = <&mux3>; next-level-cache = <&L2_3>; L2_3: l2-cache { next-level-cache = <&cpc>; diff --git a/arch/powerpc/boot/dts/fsl/p3041si-post.dtsi b/arch/powerpc/boot/dts/fsl/p3041si-post.dtsi index 9b5a81a..25b19cc 100644 --- a/arch/powerpc/boot/dts/fsl/p3041si-post.dtsi +++ b/arch/powerpc/boot/dts/fsl/p3041si-post.dtsi @@ -332,9 +332,69 @@ }; clockgen: global-utilities@e1000 { - compatible = "fsl,p3041-clockgen", "fsl,qoriq-clockgen-1.0"; + compatible = "fsl,p3041-clockgen", "fsl,qoriq-clockgen-1.0", + "fixed-clock"; reg = <0xe1000 0x1000>; clock-frequency = <0>; + clock-output-names = "sysclk"; + #clock-cells = <0>; + + #address-cells = <1>; + #size-cells = <0>; + pll0: pll1@800 { + #clock-cells = <1>; + reg = <0x800>; + compatible = "fsl,core-pll-clock"; + clocks = <&clockgen>; + clock-output-names = "pll0", "pll0-div2", "pll0-div4"; + }; + pll1: pll1@820 { + #clock-cells = <1>; + reg = <0x820>; + compatible = "fsl,core-pll-clock"; + clocks = <&clockgen>; + clock-output-names = "pll1", "pll1-div2", "pll1-div4"; + }; + mux0: mux0@0 { + #clock-cells = <0>; + reg = <0x0>; + compatible = "fsl,core-mux-clock"; + clocks = <&pll0 0>, <&pll0 1>, <&pll0 2>, + <&pll1 0>, <&pll1 1>, <&pll1 2>; + clock-names = "pll0_0", "pll0_1", "pll0_2", + "pll1_0", "pll1_1", "pll1_2"; + clock-output-names = "cmux0"; + }; + mux1: mux1@20 { + #clock-cells = <0>; + reg = <0x20>; + compatible = "fsl,core-mux-clock"; + clocks = <&pll0 0>, <&pll0 1>, <&pll0 2>, + <&pll1 0>, <&pll1 1>, <&pll1 2>; + clock-names = "pll0_0", "pll0_1", "pll0_2", + "pll1_0", "pll1_1", "pll1_2"; + clock-output-names = "cmux1"; + }; + mux2: mux2@40 { + #clock-cells = <0>; + reg = <0x40>; + compatible = "fsl,core-mux-clock"; + clocks = <&pll0 0>, <&pll0 1>, <&pll0 2>, + <&pll1 0>, <&pll1 1>, <&pll1 2>; + clock-names = "pll0_0", "pll0_1", "pll0_2", + "pll1_0", "pll1_1", "pll1_2"; + clock-output-names = "cmux2"; + }; + mux3: mux3@60 { + #clock-cells = <0>; + reg = <0x60>; + compatible = "fsl,core-mux-clock"; + clocks = <&pll0 0>, <&pll0 1>, <&pll0 2>, + <&pll1 0>, <&pll1 1>, <&pll1 2>; + clock-names = "pll0_0", "pll0_1", "pll0_2", + "pll1_0", "pll1_1", "pll1_2"; + clock-output-names = "cmux3"; + }; }; rcpm: global-utilities@e2000 { diff --git a/arch/powerpc/boot/dts/fsl/p3041si-pre.dtsi b/arch/powerpc/boot/dts/fsl/p3041si-pre.dtsi index c9ca2c3..468e8be 100644 --- a/arch/powerpc/boot/dts/fsl/p3041si-pre.dtsi +++ b/arch/powerpc/boot/dts/fsl/p3041si-pre.dtsi @@ -82,6 +82,7 @@ cpu0: PowerPC,e500mc@0 { device_type = "cpu"; reg = <0>; + clocks = <&mux0>; next-level-cache = <&L2_0>; L2_0: l2-cache { next-level-cache = <&cpc>; @@ -90,6 +91,7 @@ cpu1: PowerPC,e500mc@1 { device_type = "cpu"; reg = <1>; + clocks = <&mux1>; next-level-cache = <&L2_1>; L2_1: l2-cache { next-level-cache = <&cpc>; @@ -98,6 +100,7 @@ cpu2: PowerPC,e500mc@2 { device_type = "cpu"; reg = <2>; + clocks = <&mux2>; next-level-cache = <&L2_2>; L2_2: l2-cache { next-level-cache = <&cpc>; @@ -106,6 +109,7 @@ cpu3: PowerPC,e500mc@3 { device_type = "cpu"; reg = <3>; + clocks = <&mux3>; next-level-cache = <&L2_3>; L2_3: l2-cache { next-level-cache = <&cpc>; diff --git a/arch/powerpc/boot/dts/fsl/p4080si-post.dtsi b/arch/powerpc/boot/dts/fsl/p4080si-post.dtsi index 19859ad..3596f05 100644 --- a/arch/powerpc/boot/dts/fsl/p4080si-post.dtsi +++ b/arch/powerpc/boot/dts/fsl/p4080si-post.dtsi @@ -352,9 +352,107 @@ }; clockgen: global-utilities@e1000 { - compatible = "fsl,p4080-clockgen", "fsl,qoriq-clockgen-1.0"; + compatible = "fsl,p4080-clockgen", "fsl,qoriq-clockgen-1.0", + "fixed-clock"; reg = <0xe1000 0x1000>; clock-frequency = <0>; + clock-output-names = "sysclk"; + #clock-cells = <0>; + + #address-cells = <1>; + #size-cells = <0>; + pll0: pll0@800 { + #clock-cells = <1>; + reg = <0x800>; + compatible = "fsl,core-pll-clock"; + clocks = <&clockgen>; + clock-output-names = "pll0", "pll0-div2"; + }; + pll1: pll1@820 { + #clock-cells = <1>; + reg = <0x820>; + compatible = "fsl,core-pll-clock"; + clocks = <&clockgen>; + clock-output-names = "pll1", "pll1-div2"; + }; + pll2: pll2@840 { + #clock-cells = <1>; + reg = <0x840>; + compatible = "fsl,core-pll-clock"; + clocks = <&clockgen>; + clock-output-names = "pll2", "pll2-div2"; + }; + pll3: pll2@860 { + #clock-cells = <1>; + reg = <0x860>; + compatible = "fsl,core-pll-clock"; + clocks = <&clockgen>; + clock-output-names = "pll3", "pll3-div2"; + }; + mux0: mux0@0 { + #clock-cells = <0>; + reg = <0x0>; + compatible = "fsl,core-mux-clock"; + clocks = <&pll0 0>, <&pll0 1>, <&pll1 0>, <&pll1 1>; + clock-names = "pll0_0", "pll0_1", "pll1_0", "pll1_1"; + clock-output-names = "cmux0"; + }; + mux1: mux1@20 { + #clock-cells = <0>; + reg = <0x20>; + compatible = "fsl,core-mux-clock"; + clocks = <&pll0 0>, <&pll0 1>, <&pll1 0>, <&pll1 1>; + clock-names = "pll0_0", "pll0_1", "pll1_0", "pll1_1"; + clock-output-names = "cmux1"; + }; + mux2: mux2@40 { + #clock-cells = <0>; + reg = <0x40>; + compatible = "fsl,core-mux-clock"; + clocks = <&pll0 0>, <&pll0 1>, <&pll1 0>, <&pll1 1>; + clock-names = "pll0_0", "pll0_1", "pll1_0", "pll1_1"; + clock-output-names = "cmux2"; + }; + mux3: mux3@60 { + #clock-cells = <0>; + reg = <0x60>; + compatible = "fsl,core-mux-clock"; + clocks = <&pll0 0>, <&pll0 1>, <&pll1 0>, <&pll1 1>; + clock-names = "pll0_0", "pll0_1", "pll1_0", "pll1_1"; + clock-output-names = "cmux3"; + }; + mux4: mux4@80 { + #clock-cells = <0>; + reg = <0x80>; + compatible = "fsl,core-mux-clock"; + clocks = <&pll2 0>, <&pll2 1>, <&pll3 0>, <&pll3 1>; + clock-names = "pll2_0", "pll2_1", "pll3_0", "pll3_1"; + clock-output-names = "cmux4"; + }; + mux5: mux5@a0 { + #clock-cells = <0>; + reg = <0xa0>; + compatible = "fsl,core-mux-clock"; + clocks = <&pll2 0>, <&pll2 1>, <&pll3 0>, <&pll3 1>; + clock-names = "pll2_0", "pll2_1", "pll3_0", "pll3_1"; + clock-output-names = "cmux5"; + }; + mux6: mux6@c0 { + #clock-cells = <0>; + reg = <0xc0>; + compatible = "fsl,core-mux-clock"; + clocks = <&pll2 0>, <&pll2 1>, <&pll3 0>, <&pll3 1>; + clock-names = "pll2_0", "pll2_1", "pll3_0", "pll3_1"; + clock-output-names = "cmux6"; + }; + mux7: mux7@e0 { + #clock-cells = <0>; + reg = <0xe0>; + compatible = "fsl,core-mux-clock"; + clocks = <&pll2 0>, <&pll2 1>, <&pll3 0>, <&pll3 1>; + clock-names = "pll2_0", "pll2_1", "pll3_0", "pll3_1"; + clock-output-names = "cmux7"; + }; }; rcpm: global-utilities@e2000 { diff --git a/arch/powerpc/boot/dts/fsl/p4080si-pre.dtsi b/arch/powerpc/boot/dts/fsl/p4080si-pre.dtsi index 493d9a0..0040b5a 100644 --- a/arch/powerpc/boot/dts/fsl/p4080si-pre.dtsi +++ b/arch/powerpc/boot/dts/fsl/p4080si-pre.dtsi @@ -81,6 +81,7 @@ cpu0: PowerPC,e500mc@0 { device_type = "cpu"; reg = <0>; + clocks = <&mux0>; next-level-cache = <&L2_0>; L2_0: l2-cache { next-level-cache = <&cpc>; @@ -89,6 +90,7 @@ cpu1: PowerPC,e500mc@1 { device_type = "cpu"; reg = <1>; + clocks = <&mux1>; next-level-cache = <&L2_1>; L2_1: l2-cache { next-level-cache = <&cpc>; @@ -97,6 +99,7 @@ cpu2: PowerPC,e500mc@2 { device_type = "cpu"; reg = <2>; + clocks = <&mux2>; next-level-cache = <&L2_2>; L2_2: l2-cache { next-level-cache = <&cpc>; @@ -105,6 +108,7 @@ cpu3: PowerPC,e500mc@3 { device_type = "cpu"; reg = <3>; + clocks = <&mux3>; next-level-cache = <&L2_3>; L2_3: l2-cache { next-level-cache = <&cpc>; @@ -113,6 +117,7 @@ cpu4: PowerPC,e500mc@4 { device_type = "cpu"; reg = <4>; + clocks = <&mux4>; next-level-cache = <&L2_4>; L2_4: l2-cache { next-level-cache = <&cpc>; @@ -121,6 +126,7 @@ cpu5: PowerPC,e500mc@5 { device_type = "cpu"; reg = <5>; + clocks = <&mux5>; next-level-cache = <&L2_5>; L2_5: l2-cache { next-level-cache = <&cpc>; @@ -129,6 +135,7 @@ cpu6: PowerPC,e500mc@6 { device_type = "cpu"; reg = <6>; + clocks = <&mux6>; next-level-cache = <&L2_6>; L2_6: l2-cache { next-level-cache = <&cpc>; @@ -137,6 +144,7 @@ cpu7: PowerPC,e500mc@7 { device_type = "cpu"; reg = <7>; + clocks = <&mux7>; next-level-cache = <&L2_7>; L2_7: l2-cache { next-level-cache = <&cpc>; diff --git a/arch/powerpc/boot/dts/fsl/p5020si-post.dtsi b/arch/powerpc/boot/dts/fsl/p5020si-post.dtsi index 9ea77c3..3c662bd 100644 --- a/arch/powerpc/boot/dts/fsl/p5020si-post.dtsi +++ b/arch/powerpc/boot/dts/fsl/p5020si-post.dtsi @@ -337,9 +337,49 @@ }; clockgen: global-utilities@e1000 { - compatible = "fsl,p5020-clockgen", "fsl,qoriq-clockgen-1.0"; + compatible = "fsl,p5020-clockgen", "fsl,qoriq-clockgen-1.0", + "fixed-clock"; reg = <0xe1000 0x1000>; clock-frequency = <0>; + clock-output-names = "sysclk"; + #clock-cells = <0>; + + #address-cells = <1>; + #size-cells = <0>; + pll0: pll0@800 { + #clock-cells = <1>; + reg = <0x800>; + compatible = "fsl,core-pll-clock"; + clocks = <&clockgen>; + clock-output-names = "pll0", "pll0-div2", "pll0-div4"; + }; + pll1: pll1@820 { + #clock-cells = <1>; + reg = <0x820>; + compatible = "fsl,core-pll-clock"; + clocks = <&clockgen>; + clock-output-names = "pll1", "pll1-div2", "pll1-div4"; + }; + mux0: mux0@0 { + #clock-cells = <0>; + reg = <0x0>; + compatible = "fsl,core-mux-clock"; + clocks = <&pll0 0>, <&pll0 1>, <&pll0 2>, + <&pll1 0>, <&pll1 1>, <&pll1 2>; + clock-names = "pll0_0", "pll0_1", "pll0_2", + "pll1_0", "pll1_1", "pll1_2"; + clock-output-names = "cmux0"; + }; + mux1: mux1@20 { + #clock-cells = <0>; + reg = <0x20>; + compatible = "fsl,core-mux-clock"; + clocks = <&pll0 0>, <&pll0 1>, <&pll0 2>, + <&pll1 0>, <&pll1 1>, <&pll1 2>; + clock-names = "pll0_0", "pll0_1", "pll0_2", + "pll1_0", "pll1_1", "pll1_2"; + clock-output-names = "cmux1"; + }; }; rcpm: global-utilities@e2000 { diff --git a/arch/powerpc/boot/dts/fsl/p5020si-pre.dtsi b/arch/powerpc/boot/dts/fsl/p5020si-pre.dtsi index 8df47fc..fe1a2e6 100644 --- a/arch/powerpc/boot/dts/fsl/p5020si-pre.dtsi +++ b/arch/powerpc/boot/dts/fsl/p5020si-pre.dtsi @@ -88,6 +88,7 @@ cpu0: PowerPC,e5500@0 { device_type = "cpu"; reg = <0>; + clocks = <&mux0>; next-level-cache = <&L2_0>; L2_0: l2-cache { next-level-cache = <&cpc>; @@ -96,6 +97,7 @@ cpu1: PowerPC,e5500@1 { device_type = "cpu"; reg = <1>; + clocks = <&mux1>; next-level-cache = <&L2_1>; L2_1: l2-cache { next-level-cache = <&cpc>; diff --git a/arch/powerpc/boot/dts/fsl/p5040si-post.dtsi b/arch/powerpc/boot/dts/fsl/p5040si-post.dtsi index 97f8c26..3870b22 100644 --- a/arch/powerpc/boot/dts/fsl/p5040si-post.dtsi +++ b/arch/powerpc/boot/dts/fsl/p5040si-post.dtsi @@ -297,9 +297,61 @@ }; clockgen: global-utilities@e1000 { - compatible = "fsl,p5040-clockgen", "fsl,qoriq-clockgen-1.0"; + compatible = "fsl,p5040-clockgen", "fsl,qoriq-clockgen-1.0", + "fixed-clock"; reg = <0xe1000 0x1000>; clock-frequency = <0>; + clock-output-names = "sysclk"; + #clock-cells = <0>; + + #address-cells = <1>; + #size-cells = <0>; + pll0: pll0@800 { + #clock-cells = <1>; + reg = <0x800>; + compatible = "fsl,core-pll-clock"; + clocks = <&clockgen>; + clock-output-names = "pll0", "pll0-div2"; + }; + pll1: pll1@820 { + #clock-cells = <1>; + reg = <0x820>; + compatible = "fsl,core-pll-clock"; + clocks = <&clockgen>; + clock-output-names = "pll1", "pll1-div2"; + }; + mux0: mux0@0 { + #clock-cells = <0>; + reg = <0x0>; + compatible = "fsl,core-mux-clock"; + clocks = <&pll0 0>, <&pll0 1>, <&pll1 0>, <&pll1 1>; + clock-names = "pll0_0", "pll0_1", "pll1_0", "pll1_1"; + clock-output-names = "cmux0"; + }; + mux1: mux1@20 { + #clock-cells = <0>; + reg = <0x20>; + compatible = "fsl,core-mux-clock"; + clocks = <&pll0 0>, <&pll0 1>, <&pll1 0>, <&pll1 1>; + clock-names = "pll0_0", "pll0_1", "pll1_0", "pll1_1"; + clock-output-names = "cmux1"; + }; + mux2: mux2@40 { + #clock-cells = <0>; + reg = <0x40>; + compatible = "fsl,core-mux-clock"; + clocks = <&pll0 0>, <&pll0 1>, <&pll1 0>, <&pll1 1>; + clock-names = "pll0_0", "pll0_1", "pll1_0", "pll1_1"; + clock-output-names = "cmux2"; + }; + mux3: mux3@60 { + #clock-cells = <0>; + reg = <0x60>; + compatible = "fsl,core-mux-clock"; + clocks = <&pll0 0>, <&pll0 1>, <&pll1 0>, <&pll1 1>; + clock-names = "pll0_0", "pll0_1", "pll1_0", "pll1_1"; + clock-output-names = "cmux3"; + }; }; rcpm: global-utilities@e2000 { diff --git a/arch/powerpc/boot/dts/fsl/p5040si-pre.dtsi b/arch/powerpc/boot/dts/fsl/p5040si-pre.dtsi index 40ca943..3674686 100644 --- a/arch/powerpc/boot/dts/fsl/p5040si-pre.dtsi +++ b/arch/powerpc/boot/dts/fsl/p5040si-pre.dtsi @@ -81,6 +81,7 @@ cpu0: PowerPC,e5500@0 { device_type = "cpu"; reg = <0>; + clocks = <&mux0>; next-level-cache = <&L2_0>; L2_0: l2-cache { next-level-cache = <&cpc>; @@ -89,6 +90,7 @@ cpu1: PowerPC,e5500@1 { device_type = "cpu"; reg = <1>; + clocks = <&mux1>; next-level-cache = <&L2_1>; L2_1: l2-cache { next-level-cache = <&cpc>; @@ -97,6 +99,7 @@ cpu2: PowerPC,e5500@2 { device_type = "cpu"; reg = <2>; + clocks = <&mux2>; next-level-cache = <&L2_2>; L2_2: l2-cache { next-level-cache = <&cpc>; @@ -105,6 +108,7 @@ cpu3: PowerPC,e5500@3 { device_type = "cpu"; reg = <3>; + clocks = <&mux3>; next-level-cache = <&L2_3>; L2_3: l2-cache { next-level-cache = <&cpc>; -- 1.8.0 -- To unsubscribe from this list: send the line "unsubscribe linux-doc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html