Documentation/devicetree/bindings/pinctrl/axis,artpec6-pinctrl.txt

   1 Axis ARTPEC-6 Pin Controller
   2
   3 Required properties:
   4 - compatible: "axis,artpec6-pinctrl".
   5 - reg: Should contain the register physical address and length for the pin
   6        controller.
   7
   8 A pinctrl node should contain at least one subnode representing the pinctrl
   9 groups available on the machine. Each subnode will list the mux function
  10 required and what pin group it will use. Each subnode will also configure the
  11 drive strength and bias pullup of the pin group. If either of these options is
  12 not set, its actual value will be unspecified.
  13
  14
  15 Required subnode-properties:
  16 - function: Function to mux.
  17 - groups: Name of the pin group to use for the function above.
  18
  19         Available functions and groups (function: group0, group1...):
  20                 gpio: cpuclkoutgrp0, udlclkoutgrp0, i2c1grp0, i2c2grp0,
  21                       i2c3grp0, i2s0grp0, i2s1grp0, i2srefclkgrp0, spi0grp0,
  22                       spi1grp0, pciedebuggrp0, uart0grp0, uart0grp1, uart1grp0,
  23                       uart2grp0, uart2grp1, uart3grp0, uart4grp0, uart5grp0,
  24                       uart5nocts
  25                 cpuclkout: cpuclkoutgrp0
  26                 udlclkout: udlclkoutgrp0
  27                 i2c1: i2c1grp0
  28                 i2c2: i2c2grp0
  29                 i2c3: i2c3grp0
  30                 i2s0: i2s0grp0
  31                 i2s1: i2s1grp0
  32                 i2srefclk: i2srefclkgrp0
  33                 spi0: spi0grp0
  34                 spi1: spi1grp0
  35                 pciedebug: pciedebuggrp0
  36                 uart0: uart0grp0, uart0grp1
  37                 uart1: uart1grp0
  38                 uart2: uart2grp0, uart2grp1
  39                 uart3: uart3grp0
  40                 uart4: uart4grp0
  41                 uart5: uart5grp0, uart5nocts
  42                 nand: nandgrp0
  43                 sdio0: sdio0grp0
  44                 sdio1: sdio1grp0
  45                 ethernet: ethernetgrp0
  46
  47
  48 Optional subnode-properties (see pinctrl-bindings.txt):
  49 - drive-strength: 4, 6, 8, 9 mA.  For SD and NAND pins, this is for 3.3V VCCQ3.
  50 - bias-pull-up
  51 - bias-disable
  52
  53 Examples:
  54 pinctrl@f801d000 {
  55         compatible = "axis,artpec6-pinctrl";
  56         reg = <0xf801d000 0x400>;
  57
  58         pinctrl_uart0: uart0grp {
  59                 function = "uart0";
  60                 groups = "uart0grp0";
  61                 drive-strength = <4>;
  62                 bias-pull-up;
  63         };
  64         pinctrl_uart3: uart3grp {
  65                 function = "uart3";
  66                 groups = "uart3grp0";
  67         };
  68 };
  69 uart0: uart@f8036000 {
  70         compatible = "arm,pl011", "arm,primecell";
  71         reg = <0xf8036000 0x1000>;
  72         interrupts = <0 104 IRQ_TYPE_LEVEL_HIGH>;
  73         clocks = <&pll2div24>, <&apb_pclk>;
  74         clock-names = "uart_clk", "apb_pclk";
  75         pinctrl-names = "default";
  76         pinctrl-0 = <&pinctrl_uart0>;
  77 };
  78 uart3: uart@f8039000 {
  79         compatible = "arm,pl011", "arm,primecell";
  80         reg = <0xf8039000 0x1000>;
  81         interrupts = <0 128 IRQ_TYPE_LEVEL_HIGH>;
  82         clocks = <&pll2div24>, <&apb_pclk>;
  83         clock-names = "uart_clk", "apb_pclk";
  84         pinctrl-names = "default";
  85         pinctrl-0 = <&pinctrl_uart3>;
  86 };