fsl,imx27-pinctrl.txt

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    1 * Freescale IMX27 IOMUX Controller
    2 
    3 Required properties:
    4 - compatible: "fsl,imx27-iomuxc"
    5 
    6 The iomuxc driver node should define subnodes containing of pinctrl configuration subnodes.
    7 
    8 Required properties for pin configuration node:
    9 - fsl,pins: three integers array, represents a group of pins mux and config
   10   setting. The format is fsl,pins = <PIN MUX_ID CONFIG>.
   11 
   12   PIN is an integer between 0 and 0xbf. imx27 has 6 ports with 32 configurable
   13   configurable pins each. PIN is PORT * 32 + PORT_PIN, PORT_PIN is the pin
   14   number on the specific port (between 0 and 31).
   15 
   16   MUX_ID is
   17     function + (direction << 2) + (gpio_oconf << 4) + (gpio_iconfa << 8) + (gpio_iconfb << 10)
   18 
   19       function value is used to select the pin function.
   20       Possible values:
   21           0 - Primary function
   22           1 - Alternate function
   23           2 - GPIO
   24       Registers: GIUS (GPIO In Use), GPR (General Purpose Register)
   25 
   26       direction defines the data direction of the pin.
   27       Possible values:
   28           0 - Input
   29           1 - Output
   30       Register: DDIR
   31 
   32       gpio_oconf configures the gpio submodule output signal. This does not
   33       have any effect unless GPIO function is selected. A/B/C_IN are output
   34       signals of function blocks A,B and C. Specific function blocks are
   35       described in the reference manual.
   36       Possible values:
   37           0 - A_IN
   38           1 - B_IN
   39           2 - C_IN
   40           3 - Data Register
   41       Registers: OCR1, OCR2
   42 
   43       gpio_iconfa/b configures the gpio submodule input to functionblocks A and
   44       B. GPIO function should be selected if this is configured.
   45       Possible values:
   46           0 - GPIO_IN
   47           1 - Interrupt Status Register
   48           2 - Pulldown
   49           3 - Pullup
   50       Registers ICONFA1, ICONFA2, ICONFB1 and ICONFB2
   51 
   52   CONFIG can be 0 or 1, meaning Pullup disable/enable.
   53 
   54 
   55 The iomux controller has gpio child nodes which are embedded in the iomux
   56 control registers. They have to be defined as child nodes of the iomux device
   57 node. If gpio subnodes are defined "#address-cells", "#size-cells" and "ranges"
   58 properties for the iomux device node are required.
   59 
   60 Example:
   61 
   62 iomuxc: iomuxc@10015000 {
   63         compatible = "fsl,imx27-iomuxc";
   64         reg = <0x10015000 0x600>;
   65         #address-cells = <1>;
   66         #size-cells = <1>;
   67         ranges;
   68 
   69         gpio1: gpio@10015000 {
   70                 ...
   71         };
   72 
   73         ...
   74 
   75         uart {
   76                 pinctrl_uart1: uart-1 {
   77                         fsl,pins = <
   78                                 0x8c 0x004 0x0 /* UART1_TXD__UART1_TXD */
   79                                 0x8d 0x000 0x0 /* UART1_RXD__UART1_RXD */
   80                                 0x8e 0x004 0x0 /* UART1_CTS__UART1_CTS */
   81                                 0x8f 0x000 0x0 /* UART1_RTS__UART1_RTS */
   82                         >;
   83                 };
   84 
   85                 ...
   86         };
   87 };
   88 
   89 
   90 For convenience there are macros defined in imx27-pinfunc.h which provide PIN
   91 and MUX_ID. They are structured as MX27_PAD_<Pad name>__<Signal name>. The names
   92 are defined in the i.MX27 reference manual.
   93 
   94 The above example using macros:
   95 
   96 iomuxc: iomuxc@10015000 {
   97         compatible = "fsl,imx27-iomuxc";
   98         reg = <0x10015000 0x600>;
   99         #address-cells = <1>;
  100         #size-cells = <1>;
  101         ranges;
  102 
  103         gpio1: gpio@10015000 {
  104                 ...
  105         };
  106 
  107         ...
  108 
  109         uart {
  110                 pinctrl_uart1: uart-1 {
  111                         fsl,pins = <
  112                                 MX27_PAD_UART1_TXD__UART1_TXD 0x0
  113                                 MX27_PAD_UART1_RXD__UART1_RXD 0x0
  114                                 MX27_PAD_UART1_CTS__UART1_CTS 0x0
  115                                 MX27_PAD_UART1_RTS__UART1_RTS 0x0
  116                         >;
  117                 };
  118 
  119                 ...
  120         };
  121 };

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FreeBSD/Linux Kernel Cross Reference sys/contrib/device-tree/Bindings/pinctrl/fsl,imx27-pinctrl.txt

FreeBSD/Linux Kernel Cross Reference
sys/contrib/device-tree/Bindings/pinctrl/fsl,imx27-pinctrl.txt