1 NVIDIA Tegra PCIe controller
4 - compatible: For Tegra20, must contain "nvidia,tegra20-pcie". For Tegra30,
5 "nvidia,tegra30-pcie". For Tegra124, must contain "nvidia,tegra124-pcie".
6 Otherwise, must contain "nvidia,<chip>-pcie", plus one of the above, where
7 <chip> is tegra132 or tegra210.
8 - device_type: Must be "pci"
9 - reg: A list of physical base address and length for each set of controller
10 registers. Must contain an entry for each entry in the reg-names property.
11 - reg-names: Must include the following entries:
12 "pads": PADS registers
14 "cs": configuration space region
15 - interrupts: A list of interrupt outputs of the controller. Must contain an
16 entry for each entry in the interrupt-names property.
17 - interrupt-names: Must include the following entries:
18 "intr": The Tegra interrupt that is asserted for controller interrupts
19 "msi": The Tegra interrupt that is asserted when an MSI is received
20 - bus-range: Range of bus numbers associated with this controller
21 - #address-cells: Address representation for root ports (must be 3)
22 - cell 0 specifies the bus and device numbers of the root port:
24 [15:11]: device number
25 - cell 1 denotes the upper 32 address bits and should be 0
26 - cell 2 contains the lower 32 address bits and is used to translate to the
28 - #size-cells: Size representation for root ports (must be 2)
29 - ranges: Describes the translation of addresses for root ports and standard
30 PCI regions. The entries must be 6 cells each, where the first three cells
31 correspond to the address as described for the #address-cells property
32 above, the fourth cell is the physical CPU address to translate to and the
33 fifth and six cells are as described for the #size-cells property above.
34 - The first two entries are expected to translate the addresses for the root
35 port registers, which are referenced by the assigned-addresses property of
36 the root port nodes (see below).
37 - The remaining entries setup the mapping for the standard I/O, memory and
38 prefetchable PCI regions. The first cell determines the type of region
40 - 0x81000000: I/O memory region
41 - 0x82000000: non-prefetchable memory region
42 - 0xc2000000: prefetchable memory region
43 Please refer to the standard PCI bus binding document for a more detailed
45 - #interrupt-cells: Size representation for interrupts (must be 1)
46 - interrupt-map-mask and interrupt-map: Standard PCI IRQ mapping properties
47 Please refer to the standard PCI bus binding document for a more detailed
49 - clocks: Must contain an entry for each entry in clock-names.
50 See ../clocks/clock-bindings.txt for details.
51 - clock-names: Must include the following entries:
55 - cml (not required for Tegra20)
56 - resets: Must contain an entry for each entry in reset-names.
57 See ../reset/reset.txt for details.
58 - reset-names: Must include the following entries:
63 Required properties on Tegra124 and later:
64 - phys: Must contain an entry for each entry in phy-names.
65 - phy-names: Must include the following entries:
68 Power supplies for Tegra20:
69 - avdd-pex-supply: Power supply for analog PCIe logic. Must supply 1.05 V.
70 - vdd-pex-supply: Power supply for digital PCIe I/O. Must supply 1.05 V.
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-clk-supply: Power supply for PCIe clock. Must supply 3.3 V.
77 Power supplies for Tegra30:
79 - avdd-pex-pll-supply: Power supply for dedicated (internal) PCIe PLL. Must
81 - avdd-plle-supply: Power supply for PLLE, which is shared with SATA. Must
83 - vddio-pex-ctl-supply: Power supply for PCIe control I/O partition. Must
85 - hvdd-pex-supply: High-voltage supply for PCIe I/O and PCIe output clocks.
88 - If lanes 0 to 3 are used:
89 - avdd-pexa-supply: Power supply for analog PCIe logic. Must supply 1.05 V.
90 - vdd-pexa-supply: Power supply for digital PCIe I/O. Must supply 1.05 V.
91 - If lanes 4 or 5 are used:
92 - avdd-pexb-supply: Power supply for analog PCIe logic. Must supply 1.05 V.
93 - vdd-pexb-supply: Power supply for digital PCIe I/O. Must supply 1.05 V.
95 Power supplies for Tegra124:
97 - avddio-pex-supply: Power supply for analog PCIe logic. Must supply 1.05 V.
98 - dvddio-pex-supply: Power supply for digital PCIe I/O. Must supply 1.05 V.
99 - avdd-pex-pll-supply: Power supply for dedicated (internal) PCIe PLL. Must
101 - hvdd-pex-supply: High-voltage supply for PCIe I/O and PCIe output clocks.
103 - hvdd-pex-pll-e-supply: High-voltage supply for PLLE (shared with USB3).
105 - vddio-pex-ctl-supply: Power supply for PCIe control I/O partition. Must
107 - avdd-pll-erefe-supply: Power supply for PLLE (shared with USB3). Must
110 Root ports are defined as subnodes of the PCIe controller node.
113 - device_type: Must be "pci"
114 - assigned-addresses: Address and size of the port configuration registers
115 - reg: PCI bus address of the root port
116 - #address-cells: Must be 3
117 - #size-cells: Must be 2
118 - ranges: Sub-ranges distributed from the PCIe controller node. An empty
119 property is sufficient.
120 - nvidia,num-lanes: Number of lanes to use for this port. Valid combinations
122 - Root port 0 uses 4 lanes, root port 1 is unused.
123 - Both root ports use 2 lanes.
130 compatible = "nvidia,tegra20-pcie";
132 reg = <0x80003000 0x00000800 /* PADS registers */
133 0x80003800 0x00000200 /* AFI registers */
134 0x90000000 0x10000000>; /* configuration space */
135 reg-names = "pads", "afi", "cs";
136 interrupts = <0 98 0x04 /* controller interrupt */
137 0 99 0x04>; /* MSI interrupt */
138 interrupt-names = "intr", "msi";
140 #interrupt-cells = <1>;
141 interrupt-map-mask = <0 0 0 0>;
142 interrupt-map = <0 0 0 0 &intc GIC_SPI 98 IRQ_TYPE_LEVEL_HIGH>;
144 bus-range = <0x00 0xff>;
145 #address-cells = <3>;
148 ranges = <0x82000000 0 0x80000000 0x80000000 0 0x00001000 /* port 0 registers */
149 0x82000000 0 0x80001000 0x80001000 0 0x00001000 /* port 1 registers */
150 0x81000000 0 0 0x82000000 0 0x00010000 /* downstream I/O */
151 0x82000000 0 0xa0000000 0xa0000000 0 0x10000000 /* non-prefetchable memory */
152 0xc2000000 0 0xb0000000 0xb0000000 0 0x10000000>; /* prefetchable memory */
154 clocks = <&tegra_car 70>, <&tegra_car 72>, <&tegra_car 118>;
155 clock-names = "pex", "afi", "pll_e";
156 resets = <&tegra_car 70>, <&tegra_car 72>, <&tegra_car 74>;
157 reset-names = "pex", "afi", "pcie_x";
162 assigned-addresses = <0x82000800 0 0x80000000 0 0x1000>;
163 reg = <0x000800 0 0 0 0>;
166 #address-cells = <3>;
171 nvidia,num-lanes = <2>;
176 assigned-addresses = <0x82001000 0 0x80001000 0 0x1000>;
177 reg = <0x001000 0 0 0 0>;
180 #address-cells = <3>;
185 nvidia,num-lanes = <2>;
195 vdd-supply = <&pci_vdd_reg>;
196 pex-clk-supply = <&pci_clk_reg>;
198 /* root port 00:01.0 */
202 /* bridge 01:00.0 (optional) */
204 reg = <0x010000 0 0 0 0>;
206 #address-cells = <3>;
211 /* endpoint 02:00.0 */
213 reg = <0x020000 0 0 0 0>;
219 Note that devices on the PCI bus are dynamically discovered using PCI's bus
220 enumeration and therefore don't need corresponding device nodes in DT. However
221 if a device on the PCI bus provides a non-probeable bus such as I2C or SPI,
222 device nodes need to be added in order to allow the bus' children to be
223 instantiated at the proper location in the operating system's device tree (as
224 illustrated by the optional nodes in the example above).