ARM: tegra: define Tegra20 CAR binding

NVIDIA Tegra20 Clock And Reset Controller

This binding uses the common clock binding:

Documentation/devicetree/bindings/clock/clock-bindings.txt

The CAR (Clock And Reset) Controller on Tegra is the HW module responsible

for muxing and gating Tegra's clocks, and setting their rates.

Required properties :

- compatible : Should be "nvidia,tegra20-car"

- reg : Should contain CAR registers location and length

- clocks : Should contain phandle and clock specifiers for two clocks:

  the 32 KHz "32k_in", and the board-specific oscillator "osc".

- #clock-cells : Should be 1.

  In clock consumers, this cell represents the clock ID exposed by the CAR.

  The first 96 clocks are numbered to match the bits in the CAR's CLK_OUT_ENB

  registers. These IDs often match those in the CAR's RST_DEVICES registers,

  but not in all cases. Some bits in CLK_OUT_ENB affect multiple clocks. In

  this case, those clocks are assigned IDs above 95 in order to highlight

  this issue. Implementations that interpret these clock IDs as bit values

  within the CLK_OUT_ENB or RST_DEVICES registers should be careful to

  explicitly handle these special cases.

  The balance of the clocks controlled by the CAR are assigned IDs of 96 and

  above.

  0	cpu

  1	unassigned

  2	unassigned

  3	ac97

  4	rtc

  5	tmr

  6	uart1

  7	unassigned	(register bit affects uart2 and vfir)

  8	gpio

  9	sdmmc2

  10	unassigned	(register bit affects spdif_in and spdif_out)

  11	i2s1

  12	i2c1

  13	ndflash

  14	sdmmc1

  15	sdmmc4

  16	twc

  17	pwm

  18	i2s2

  19	epp

  20	unassigned	(register bit affects vi and vi_sensor)

  21	2d

  22	usbd

  23	isp

  24	3d

  25	ide

  26	disp2

  27	disp1

  28	host1x

  29	vcp

  30	unassigned

  31	cache2

  32	mem

  33	ahbdma

  34	apbdma

  35	unassigned

  36	kbc

  37	stat_mon

  38	pmc

  39	fuse

  40	kfuse

  41	sbc1

  42	snor

  43	spi1

  44	sbc2

  45	xio

  46	sbc3

  47	dvc

  48	dsi

  49	unassigned	(register bit affects tvo and cve)

  50	mipi

  51	hdmi

  52	csi

  53	tvdac

  54	i2c2

  55	uart3

  56	unassigned

  57	emc

  58	usb2

  59	usb3

  60	mpe

  61	vde

  62	bsea

  63	bsev

  64	speedo

  65	uart4

  66	uart5

  67	i2c3

  68	sbc4

  69	sdmmc3

  70	pcie

  71	owr

  72	afi

  73	csite

  74	unassigned

  75	avpucq

  76	la

  77	unassigned

  78	unassigned

  79	unassigned

  80	unassigned

  81	unassigned

  82	unassigned

  83	unassigned

  84	irama

  85	iramb

  86	iramc

  87	iramd

  88	cram2

  89	audio_2x	a/k/a audio_2x_sync_clk

  90	clk_d

  91	unassigned

  92	sus

  93	cdev1

  94	cdev2

  95	unassigned

  96	uart2

  97	vfir

  98	spdif_in

  99	spdif_out

  100	vi

  101	vi_sensor

  102	tvo

  103	cve

  104	osc

  105	clk_32k		a/k/a clk_s

  106	clk_m

  107	sclk

  108	cclk

  109	hclk

  110	pclk

  111	blink

  112	pll_a

  113	pll_a_out0

  114	pll_c

  115	pll_c_out1

  116	pll_d

  117	pll_d_out0

  118	pll_e

  119	pll_m

  120	pll_m_out1

  121	pll_p

  122	pll_p_out1

  123	pll_p_out2

  124	pll_p_out3

  125	pll_p_out4

  126	pll_s

  127	pll_u

  128	pll_x

  129	cop		a/k/a avp

  130	audio		a/k/a audio_sync_clk

  131	pll_ref

  132	twd

Example SoC include file:

/ {

	tegra_car: clock {

		compatible = "nvidia,tegra20-car";

		reg = <0x60006000 0x1000>;

		#clock-cells = <1>;

	};

	usb@c5004000 {

		clocks = <&tegra_car 58>; /* usb2 */

	};

};

Example board file:

/ {

	clocks {

		compatible = "simple-bus";

		#address-cells = <1>;

		#size-cells = <0>;

		osc: clock@0 {

			compatible = "fixed-clock";

			reg = <0>;

			#clock-cells = <0>;

			clock-frequency = <12000000>;

		};

		clk_32k: clock@1 {

			compatible = "fixed-clock";

			reg = <1>;

			#clock-cells = <0>;

			clock-frequency = <32768>;

		};

	};

	&tegra_car {

		clocks = <&clk_32k> <&osc>;

	};

};

			      0 42 0x04>;

	};

	tegra_car: clock {

		compatible = "nvidia,tegra20-car";

		reg = <0x60006000 0x1000>;

		#clock-cells = <1>;

	};

	apbdma: dma {

		compatible = "nvidia,tegra20-apbdma";

		reg = <0x6000a000 0x1200>;