1	Binding for Xilinx Zynq Pinctrl
2
3Required properties:
4- compatible: "xlnx,zynq-pinctrl"
5- syscon: phandle to SLCR
6- reg: Offset and length of pinctrl space in SLCR
7
8Please refer to pinctrl-bindings.txt in this directory for details of the
9common pinctrl bindings used by client devices, including the meaning of the
10phrase "pin configuration node".
11
12Zynq's pin configuration nodes act as a container for an arbitrary number of
13subnodes. Each of these subnodes represents some desired configuration for a
14pin, a group, or a list of pins or groups. This configuration can include the
15mux function to select on those pin(s)/group(s), and various pin configuration
16parameters, such as pull-up, slew rate, etc.
17
18Each configuration node can consist of multiple nodes describing the pinmux and
19pinconf options. Those nodes can be pinmux nodes or pinconf nodes.
20
21The name of each subnode is not important; all subnodes should be enumerated
22and processed purely based on their content.
23
24Required properties for pinmux nodes are:
25 - groups: A list of pinmux groups.
26 - function: The name of a pinmux function to activate for the specified set
27   of groups.
28
29Required properties for configuration nodes:
30One of:
31 - pins: a list of pin names
32 - groups: A list of pinmux groups.
33
34The following generic properties as defined in pinctrl-bindings.txt are valid
35to specify in a pinmux subnode:
36 groups, function
37
38The following generic properties as defined in pinctrl-bindings.txt are valid
39to specify in a pinconf subnode:
40 groups, pins, bias-disable, bias-high-impedance, bias-pull-up, slew-rate,
41 low-power-disable, low-power-enable
42
43 Valid arguments for 'slew-rate' are '0' and '1' to select between slow and fast
44 respectively.
45
46 Valid values for groups are:
47   ethernet0_0_grp, ethernet1_0_grp, mdio0_0_grp, mdio1_0_grp,
48   qspi0_0_grp, qspi1_0_grp, qspi_fbclk, qspi_cs1_grp, spi0_0_grp - spi0_2_grp,
49   spi0_X_ssY (X=0..2, Y=0..2), spi1_0_grp - spi1_3_grp,
50   spi1_X_ssY (X=0..3, Y=0..2), sdio0_0_grp - sdio0_2_grp,
51   sdio1_0_grp - sdio1_3_grp, sdio0_emio_wp, sdio0_emio_cd, sdio1_emio_wp,
52   sdio1_emio_cd, smc0_nor, smc0_nor_cs1_grp, smc0_nor_addr25_grp, smc0_nand,
53   can0_0_grp - can0_10_grp, can1_0_grp - can1_11_grp, uart0_0_grp - uart0_10_grp,
54   uart1_0_grp - uart1_11_grp, i2c0_0_grp - i2c0_10_grp, i2c1_0_grp - i2c1_10_grp,
55   ttc0_0_grp - ttc0_2_grp, ttc1_0_grp - ttc1_2_grp, swdt0_0_grp - swdt0_4_grp,
56   gpio0_0_grp - gpio0_53_grp, usb0_0_grp, usb1_0_grp
57
58 Valid values for pins are:
59   MIO0 - MIO53
60
61 Valid values for function are:
62   ethernet0, ethernet1, mdio0, mdio1, qspi0, qspi1, qspi_fbclk, qspi_cs1,
63   spi0, spi0_ss, spi1, spi1_ss, sdio0, sdio0_pc, sdio0_cd, sdio0_wp,
64   sdio1, sdio1_pc, sdio1_cd, sdio1_wp,
65   smc0_nor, smc0_nor_cs1, smc0_nor_addr25, smc0_nand, can0, can1, uart0, uart1,
66   i2c0, i2c1, ttc0, ttc1, swdt0, gpio0, usb0, usb1
67
68The following driver-specific properties as defined here are valid to specify in
69a pin configuration subnode:
70 - io-standard: Configure the pin to use the selected IO standard according to
71   this mapping:
72    1: LVCMOS18
73    2: LVCMOS25
74    3: LVCMOS33
75    4: HSTL
76
77Example:
78	pinctrl0: pinctrl@700 {
79		compatible = "xlnx,pinctrl-zynq";
80		reg = <0x700 0x200>;
81		syscon = <&slcr>;
82
83		pinctrl_uart1_default: uart1-default {
84			mux {
85				groups = "uart1_10_grp";
86				function = "uart1";
87			};
88
89			conf {
90				groups = "uart1_10_grp";
91				slew-rate = <0>;
92				io-standard = <1>;
93			};
94
95			conf-rx {
96				pins = "MIO49";
97				bias-high-impedance;
98			};
99
100			conf-tx {
101				pins = "MIO48";
102				bias-disable;
103			};
104		};
105	};
106