diff options
Diffstat (limited to 'Documentation/devicetree/bindings/clock/mvebu-gated-clock.txt')
| -rw-r--r-- | Documentation/devicetree/bindings/clock/mvebu-gated-clock.txt | 191 |
1 files changed, 191 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/clock/mvebu-gated-clock.txt b/Documentation/devicetree/bindings/clock/mvebu-gated-clock.txt new file mode 100644 index 000000000..31c7c0c1c --- /dev/null +++ b/Documentation/devicetree/bindings/clock/mvebu-gated-clock.txt @@ -0,0 +1,191 @@ +* Gated Clock bindings for Marvell EBU SoCs + +Marvell Armada 370/375/380/385/39x/XP, Dove and Kirkwood allow some +peripheral clocks to be gated to save some power. The clock consumer +should specify the desired clock by having the clock ID in its +"clocks" phandle cell. The clock ID is directly mapped to the +corresponding clock gating control bit in HW to ease manual clock +lookup in datasheet. + +The following is a list of provided IDs for Armada 370: +ID Clock Peripheral +----------------------------------- +0 Audio AC97 Cntrl +1 pex0_en PCIe 0 Clock out +2 pex1_en PCIe 1 Clock out +3 ge1 Gigabit Ethernet 1 +4 ge0 Gigabit Ethernet 0 +5 pex0 PCIe Cntrl 0 +9 pex1 PCIe Cntrl 1 +15 sata0 SATA Host 0 +17 sdio SDHCI Host +25 tdm Time Division Mplx +28 ddr DDR Cntrl +30 sata1 SATA Host 0 + +The following is a list of provided IDs for Armada 375: +ID Clock Peripheral +----------------------------------- +2 mu Management Unit +3 pp Packet Processor +4 ptp PTP +5 pex0 PCIe 0 Clock out +6 pex1 PCIe 1 Clock out +8 audio Audio Cntrl +11 nd_clk Nand Flash Cntrl +14 sata0_link SATA 0 Link +15 sata0_core SATA 0 Core +16 usb3 USB3 Host +17 sdio SDHCI Host +18 usb USB Host +19 gop Gigabit Ethernet MAC +20 sata1_link SATA 1 Link +21 sata1_core SATA 1 Core +22 xor0 XOR DMA 0 +23 xor1 XOR DMA 0 +24 copro Coprocessor +25 tdm Time Division Mplx +28 crypto0_enc Cryptographic Unit Port 0 Encryption +29 crypto0_core Cryptographic Unit Port 0 Core +30 crypto1_enc Cryptographic Unit Port 1 Encryption +31 crypto1_core Cryptographic Unit Port 1 Core + +The following is a list of provided IDs for Armada 380/385: +ID Clock Peripheral +----------------------------------- +0 audio Audio +2 ge2 Gigabit Ethernet 2 +3 ge1 Gigabit Ethernet 1 +4 ge0 Gigabit Ethernet 0 +5 pex1 PCIe 1 +6 pex2 PCIe 2 +7 pex3 PCIe 3 +8 pex0 PCIe 0 +9 usb3h0 USB3 Host 0 +10 usb3h1 USB3 Host 1 +11 usb3d USB3 Device +13 bm Buffer Management +14 crypto0z Cryptographic 0 Z +15 sata0 SATA 0 +16 crypto1z Cryptographic 1 Z +17 sdio SDIO +18 usb2 USB 2 +21 crypto1 Cryptographic 1 +22 xor0 XOR 0 +23 crypto0 Cryptographic 0 +25 tdm Time Division Multiplexing +28 xor1 XOR 1 +30 sata1 SATA 1 + +The following is a list of provided IDs for Armada 39x: +ID Clock Peripheral +----------------------------------- +5 pex1 PCIe 1 +6 pex2 PCIe 2 +7 pex3 PCIe 3 +8 pex0 PCIe 0 +9 usb3h0 USB3 Host 0 +17 sdio SDIO +22 xor0 XOR 0 +28 xor1 XOR 1 + +The following is a list of provided IDs for Armada XP: +ID Clock Peripheral +----------------------------------- +0 audio Audio Cntrl +1 ge3 Gigabit Ethernet 3 +2 ge2 Gigabit Ethernet 2 +3 ge1 Gigabit Ethernet 1 +4 ge0 Gigabit Ethernet 0 +5 pex0 PCIe Cntrl 0 +6 pex1 PCIe Cntrl 1 +7 pex2 PCIe Cntrl 2 +8 pex3 PCIe Cntrl 3 +13 bp +14 sata0lnk +15 sata0 SATA Host 0 +16 lcd LCD Cntrl +17 sdio SDHCI Host +18 usb0 USB Host 0 +19 usb1 USB Host 1 +20 usb2 USB Host 2 +22 xor0 XOR DMA 0 +23 crypto CESA engine +25 tdm Time Division Mplx +28 xor1 XOR DMA 1 +29 sata1lnk +30 sata1 SATA Host 0 + +The following is a list of provided IDs for Dove: +ID Clock Peripheral +----------------------------------- +0 usb0 USB Host 0 +1 usb1 USB Host 1 +2 ge Gigabit Ethernet +3 sata SATA Host +4 pex0 PCIe Cntrl 0 +5 pex1 PCIe Cntrl 1 +8 sdio0 SDHCI Host 0 +9 sdio1 SDHCI Host 1 +10 nand NAND Cntrl +11 camera Camera Cntrl +12 i2s0 I2S Cntrl 0 +13 i2s1 I2S Cntrl 1 +15 crypto CESA engine +21 ac97 AC97 Cntrl +22 pdma Peripheral DMA +23 xor0 XOR DMA 0 +24 xor1 XOR DMA 1 +30 gephy Gigabit Ethernel PHY +Note: gephy(30) is implemented as a parent clock of ge(2) + +The following is a list of provided IDs for Kirkwood: +ID Clock Peripheral +----------------------------------- +0 ge0 Gigabit Ethernet 0 +2 pex0 PCIe Cntrl 0 +3 usb0 USB Host 0 +4 sdio SDIO Cntrl +5 tsu Transp. Stream Unit +6 dunit SDRAM Cntrl +7 runit Runit +8 xor0 XOR DMA 0 +9 audio I2S Cntrl 0 +14 sata0 SATA Host 0 +15 sata1 SATA Host 1 +16 xor1 XOR DMA 1 +17 crypto CESA engine +18 pex1 PCIe Cntrl 1 +19 ge1 Gigabit Ethernet 1 +20 tdm Time Division Mplx + +Required properties: +- compatible : shall be one of the following: + "marvell,armada-370-gating-clock" - for Armada 370 SoC clock gating + "marvell,armada-375-gating-clock" - for Armada 375 SoC clock gating + "marvell,armada-380-gating-clock" - for Armada 380/385 SoC clock gating + "marvell,armada-390-gating-clock" - for Armada 39x SoC clock gating + "marvell,armada-xp-gating-clock" - for Armada XP SoC clock gating + "marvell,dove-gating-clock" - for Dove SoC clock gating + "marvell,kirkwood-gating-clock" - for Kirkwood SoC clock gating +- reg : shall be the register address of the Clock Gating Control register +- #clock-cells : from common clock binding; shall be set to 1 + +Optional properties: +- clocks : default parent clock phandle (e.g. tclk) + +Example: + +gate_clk: clock-gating-control@d0038 { + compatible = "marvell,dove-gating-clock"; + reg = <0xd0038 0x4>; + /* default parent clock is tclk */ + clocks = <&core_clk 0>; + #clock-cells = <1>; +}; + +sdio0: sdio@92000 { + compatible = "marvell,dove-sdhci"; + /* get clk gate bit 8 (sdio0) */ + clocks = <&gate_clk 8>; +}; |