- 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
23 crypto CESA (crypto engine)
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
10 usb3h1 USB3 Host 1
15 sata0 SATA 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 1
The following is a list of provided IDs for 98dx3236:
ID Clock Peripheral
3 ge1 Gigabit Ethernet 1
4 ge0 Gigabit Ethernet 0
5 pex0 PCIe Cntrl 0
17 sdio SDHCI Host
18 usb0 USB Host 0
22 xor0 XOR DMA 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,mv98dx3236-gating-clock” - for 98dx3236 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>;
};
