mirror of
https://github.com/torvalds/linux.git
synced 2024-12-26 04:42:12 +00:00
120 lines
2.9 KiB
Plaintext
120 lines
2.9 KiB
Plaintext
* Gated Clock bindings for Marvell Orion SoCs
|
|
|
|
Marvell 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 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,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>;
|
|
};
|