1 NVIDIA Tegra PCIe controller
4 - compatible: "nvidia,tegra20-pcie" or "nvidia,tegra30-pcie"
5 - device_type: Must be "pci"
6 - reg: A list of physical base address and length for each set of controller
7 registers. Must contain an entry for each entry in the reg-names property.
8 - reg-names: Must include the following entries:
11 "cs": configuration space region
12 - interrupts: A list of interrupt outputs of the controller. Must contain an
13 entry for each entry in the interrupt-names property.
14 - interrupt-names: Must include the following entries:
15 "intr": The Tegra interrupt that is asserted for controller interrupts
16 "msi": The Tegra interrupt that is asserted when an MSI is received
17 - bus-range: Range of bus numbers associated with this controller
18 - #address-cells: Address representation for root ports (must be 3)
19 - cell 0 specifies the bus and device numbers of the root port:
21 [15:11]: device number
22 - cell 1 denotes the upper 32 address bits and should be 0
23 - cell 2 contains the lower 32 address bits and is used to translate to the
25 - #size-cells: Size representation for root ports (must be 2)
26 - ranges: Describes the translation of addresses for root ports and standard
27 PCI regions. The entries must be 6 cells each, where the first three cells
28 correspond to the address as described for the #address-cells property
29 above, the fourth cell is the physical CPU address to translate to and the
30 fifth and six cells are as described for the #size-cells property above.
31 - The first two entries are expected to translate the addresses for the root
32 port registers, which are referenced by the assigned-addresses property of
33 the root port nodes (see below).
34 - The remaining entries setup the mapping for the standard I/O, memory and
35 prefetchable PCI regions. The first cell determines the type of region
37 - 0x81000000: I/O memory region
38 - 0x82000000: non-prefetchable memory region
39 - 0xc2000000: prefetchable memory region
40 Please refer to the standard PCI bus binding document for a more detailed
42 - #interrupt-cells: Size representation for interrupts (must be 1)
43 - interrupt-map-mask and interrupt-map: Standard PCI IRQ mapping properties
44 Please refer to the standard PCI bus binding document for a more detailed
46 - clocks: Must contain an entry for each entry in clock-names.
47 See ../clocks/clock-bindings.txt for details.
48 - clock-names: Must include the following entries:
52 - cml (not required for Tegra20)
53 - resets: Must contain an entry for each entry in reset-names.
54 See ../reset/reset.txt for details.
55 - reset-names: Must include the following entries:
60 Power supplies for Tegra20:
61 - avdd-pex-supply: Power supply for analog PCIe logic. Must supply 1.05 V.
62 - vdd-pex-supply: Power supply for digital PCIe I/O. Must supply 1.05 V.
63 - avdd-pex-pll-supply: Power supply for dedicated (internal) PCIe PLL. Must
65 - avdd-plle-supply: Power supply for PLLE, which is shared with SATA. Must
67 - vddio-pex-clk-supply: Power supply for PCIe clock. Must supply 3.3 V.
69 Power supplies for Tegra30:
71 - avdd-pex-pll-supply: Power supply for dedicated (internal) PCIe PLL. Must
73 - avdd-plle-supply: Power supply for PLLE, which is shared with SATA. Must
75 - vddio-pex-ctl-supply: Power supply for PCIe control I/O partition. Must
77 - hvdd-pex-supply: High-voltage supply for PCIe I/O and PCIe output clocks.
80 - If lanes 0 to 3 are used:
81 - avdd-pexa-supply: Power supply for analog PCIe logic. Must supply 1.05 V.
82 - vdd-pexa-supply: Power supply for digital PCIe I/O. Must supply 1.05 V.
83 - If lanes 4 or 5 are used:
84 - avdd-pexb-supply: Power supply for analog PCIe logic. Must supply 1.05 V.
85 - vdd-pexb-supply: Power supply for digital PCIe I/O. Must supply 1.05 V.
88 - pex-clk-supply: Supply voltage for internal reference clock
89 - vdd-supply: Power supply for controller (1.05V)
90 - avdd-supply: Power supply for controller (1.05V) (not required for Tegra20)
92 Root ports are defined as subnodes of the PCIe controller node.
95 - device_type: Must be "pci"
96 - assigned-addresses: Address and size of the port configuration registers
97 - reg: PCI bus address of the root port
98 - #address-cells: Must be 3
99 - #size-cells: Must be 2
100 - ranges: Sub-ranges distributed from the PCIe controller node. An empty
101 property is sufficient.
102 - nvidia,num-lanes: Number of lanes to use for this port. Valid combinations
104 - Root port 0 uses 4 lanes, root port 1 is unused.
105 - Both root ports use 2 lanes.
112 compatible = "nvidia,tegra20-pcie";
114 reg = <0x80003000 0x00000800 /* PADS registers */
115 0x80003800 0x00000200 /* AFI registers */
116 0x90000000 0x10000000>; /* configuration space */
117 reg-names = "pads", "afi", "cs";
118 interrupts = <0 98 0x04 /* controller interrupt */
119 0 99 0x04>; /* MSI interrupt */
120 interrupt-names = "intr", "msi";
122 #interrupt-cells = <1>;
123 interrupt-map-mask = <0 0 0 0>;
124 interrupt-map = <0 0 0 0 &intc GIC_SPI 98 IRQ_TYPE_LEVEL_HIGH>;
126 bus-range = <0x00 0xff>;
127 #address-cells = <3>;
130 ranges = <0x82000000 0 0x80000000 0x80000000 0 0x00001000 /* port 0 registers */
131 0x82000000 0 0x80001000 0x80001000 0 0x00001000 /* port 1 registers */
132 0x81000000 0 0 0x82000000 0 0x00010000 /* downstream I/O */
133 0x82000000 0 0xa0000000 0xa0000000 0 0x10000000 /* non-prefetchable memory */
134 0xc2000000 0 0xb0000000 0xb0000000 0 0x10000000>; /* prefetchable memory */
136 clocks = <&tegra_car 70>, <&tegra_car 72>, <&tegra_car 118>;
137 clock-names = "pex", "afi", "pll_e";
138 resets = <&tegra_car 70>, <&tegra_car 72>, <&tegra_car 74>;
139 reset-names = "pex", "afi", "pcie_x";
144 assigned-addresses = <0x82000800 0 0x80000000 0 0x1000>;
145 reg = <0x000800 0 0 0 0>;
148 #address-cells = <3>;
153 nvidia,num-lanes = <2>;
158 assigned-addresses = <0x82001000 0 0x80001000 0 0x1000>;
159 reg = <0x001000 0 0 0 0>;
162 #address-cells = <3>;
167 nvidia,num-lanes = <2>;
177 vdd-supply = <&pci_vdd_reg>;
178 pex-clk-supply = <&pci_clk_reg>;
180 /* root port 00:01.0 */
184 /* bridge 01:00.0 (optional) */
186 reg = <0x010000 0 0 0 0>;
188 #address-cells = <3>;
193 /* endpoint 02:00.0 */
195 reg = <0x020000 0 0 0 0>;
201 Note that devices on the PCI bus are dynamically discovered using PCI's bus
202 enumeration and therefore don't need corresponding device nodes in DT. However
203 if a device on the PCI bus provides a non-probeable bus such as I2C or SPI,
204 device nodes need to be added in order to allow the bus' children to be
205 instantiated at the proper location in the operating system's device tree (as
206 illustrated by the optional nodes in the example above).