kernel / Documentation / devicetree / bindings / clock / mvebu-gated-clock.txt

* 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
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>;
};