ARM: tegra: Define Tegra114 CAR binding

The device tree binding models Tegra114 CAR (Clock And Reset) as a single
monolithic clock provider.

Signed-off-by: Peter De Schrijver <pdeschrijver@nvidia.com>
Acked-by: Mike Turquette <mturquette@linaro.org>
Signed-off-by: Stephen Warren <swarren@nvidia.com>

1 files changed, 303 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/clock/nvidia,tegra114-car.txt b/Documentation/devicetree/bindings/clock/nvidia,tegra114-car.txt
new file mode 100644
index 000000000000..d6cb083b90a2
--- /dev/null
+++ b/Documentation/devicetree/bindings/clock/nvidia,tegra114-car.txt
@@ -0,0 +1,303 @@
+NVIDIA Tegra114 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,tegra114-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 160 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 160 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 160 and
+  above.
+
+  0	unassigned
+  1	unassigned
+  2	unassigned
+  3	unassigned
+  4	rtc
+  5	timer
+  6	uarta
+  7	unassigned	(register bit affects uartb and vfir)
+  8	unassigned
+  9	sdmmc2
+  10	unassigned	(register bit affects spdif_in and spdif_out)
+  11	i2s1
+  12	i2c1
+  13	ndflash
+  14	sdmmc1
+  15	sdmmc4
+  16	unassigned
+  17	pwm
+  18	i2s2
+  19	epp
+  20	unassigned	(register bit affects vi and vi_sensor)
+  21	2d
+  22	usbd
+  23	isp
+  24	3d
+  25	unassigned
+  26	disp2
+  27	disp1
+  28	host1x
+  29	vcp
+  30	i2s0
+  31	unassigned
+
+  32	unassigned
+  33	unassigned
+  34	apbdma
+  35	unassigned
+  36	kbc
+  37	unassigned
+  38	unassigned
+  39	unassigned	(register bit affects fuse and fuse_burn)
+  40	kfuse
+  41	sbc1
+  42	nor
+  43	unassigned
+  44	sbc2
+  45	unassigned
+  46	sbc3
+  47	i2c5
+  48	dsia
+  49	unassigned
+  50	mipi
+  51	hdmi
+  52	csi
+  53	unassigned
+  54	i2c2
+  55	uartc
+  56	mipi-cal
+  57	emc
+  58	usb2
+  59	usb3
+  60	msenc
+  61	vde
+  62	bsea
+  63	bsev
+
+  64	unassigned
+  65	uartd
+  66	unassigned
+  67	i2c3
+  68	sbc4
+  69	sdmmc3
+  70	unassigned
+  71	owr
+  72	afi
+  73	csite
+  74	unassigned
+  75	unassigned
+  76	la
+  77	trace
+  78	soc_therm
+  79	dtv
+  80	ndspeed
+  81	i2cslow
+  82	dsib
+  83	tsec
+  84	unassigned
+  85	unassigned
+  86	unassigned
+  87	unassigned
+  88	unassigned
+  89	xusb_host
+  90	unassigned
+  91	msenc
+  92	csus
+  93	unassigned
+  94	unassigned
+  95	unassigned	(bit affects xusb_dev and xusb_dev_src)
+
+  96	unassigned
+  97	unassigned
+  98	unassigned
+  99	mselect
+  100	tsensor
+  101	i2s3
+  102	i2s4
+  103	i2c4
+  104	sbc5
+  105	sbc6
+  106	d_audio
+  107	apbif
+  108	dam0
+  109	dam1
+  110	dam2
+  111	hda2codec_2x
+  112	unassigned
+  113	audio0_2x
+  114	audio1_2x
+  115	audio2_2x
+  116	audio3_2x
+  117	audio4_2x
+  118	spdif_2x
+  119	actmon
+  120	extern1
+  121	extern2
+  122	extern3
+  123	unassigned
+  124	unassigned
+  125	hda
+  126	unassigned
+  127	se
+
+  128	hda2hdmi
+  129	unassigned
+  130	unassigned
+  131	unassigned
+  132	unassigned
+  133	unassigned
+  134	unassigned
+  135	unassigned
+  136	unassigned
+  137	unassigned
+  138	unassigned
+  139	unassigned
+  140	unassigned
+  141	unassigned
+  142	unassigned
+  143	unassigned	(bit affects xusb_falcon_src, xusb_fs_src,
+			 xusb_host_src and xusb_ss_src)
+  144	cilab
+  145	cilcd
+  146	cile
+  147	dsialp
+  148	dsiblp
+  149	unassigned
+  150	dds
+  151	unassigned
+  152	dp2
+  153	amx
+  154	adx
+  155	unassigned	(bit affects dfll_ref and dfll_soc)
+  156	xusb_ss
+
+  192	uartb
+  193	vfir
+  194	spdif_in
+  195	spdif_out
+  196	vi
+  197	vi_sensor
+  198	fuse
+  199	fuse_burn
+  200	clk_32k
+  201	clk_m
+  202	clk_m_div2
+  203	clk_m_div4
+  204	pll_ref
+  205	pll_c
+  206	pll_c_out1
+  207	pll_c2
+  208	pll_c3
+  209	pll_m
+  210	pll_m_out1
+  211	pll_p
+  212	pll_p_out1
+  213	pll_p_out2
+  214	pll_p_out3
+  215	pll_p_out4
+  216	pll_a
+  217	pll_a_out0
+  218	pll_d
+  219	pll_d_out0
+  220	pll_d2
+  221	pll_d2_out0
+  222	pll_u
+  223	pll_u_480M
+  224	pll_u_60M
+  225	pll_u_48M
+  226	pll_u_12M
+  227	pll_x
+  228	pll_x_out0
+  229	pll_re_vco
+  230	pll_re_out
+  231	pll_e_out0
+  232	spdif_in_sync
+  233	i2s0_sync
+  234	i2s1_sync
+  235	i2s2_sync
+  236	i2s3_sync
+  237	i2s4_sync
+  238	vimclk_sync
+  239	audio0
+  240	audio1
+  241	audio2
+  242	audio3
+  243	audio4
+  244	spdif
+  245	clk_out_1
+  246	clk_out_2
+  247	clk_out_3
+  248	blink
+  252	xusb_host_src
+  253	xusb_falcon_src
+  254	xusb_fs_src
+  255	xusb_ss_src
+  256	xusb_dev_src
+  257	xusb_dev
+  258	xusb_hs_src
+  259	sclk
+  260	hclk
+  261	pclk
+  262	cclk_g
+  263	cclk_lp
+  264	dfll_ref
+  265	dfll_soc
+
+Example SoC include file:
+
+/ {
+	tegra_car: clock {
+		compatible = "nvidia,tegra114-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>;
+	};
+};