| Broadcom STB "UPG GIO" GPIO controller |
| |
| The controller's registers are organized as sets of eight 32-bit |
| registers with each set controlling a bank of up to 32 pins. A single |
| interrupt is shared for all of the banks handled by the controller. |
| |
| Required properties: |
| |
| - compatible: |
| Must be "brcm,brcmstb-gpio" |
| |
| - reg: |
| Define the base and range of the I/O address space containing |
| the brcmstb GPIO controller registers |
| |
| - #gpio-cells: |
| Should be <2>. The first cell is the pin number (within the controller's |
| pin space), and the second is used for the following: |
| bit[0]: polarity (0 for active-high, 1 for active-low) |
| |
| - gpio-controller: |
| Specifies that the node is a GPIO controller. |
| |
| - brcm,gpio-bank-widths: |
| Number of GPIO lines for each bank. Number of elements must |
| correspond to number of banks suggested by the 'reg' property. |
| |
| Optional properties: |
| |
| - interrupts: |
| The interrupt shared by all GPIO lines for this controller. |
| |
| - interrupt-parent: |
| phandle of the parent interrupt controller |
| |
| - interrupts-extended: |
| Alternate form of specifying interrupts and parents that allows for |
| multiple parents. This takes precedence over 'interrupts' and |
| 'interrupt-parent'. This probably must be used if the wakeup-source |
| property is provided because that may have a different interrupt parent. |
| |
| - #interrupt-cells: |
| Should be <2>. The first cell is the GPIO number, the second should specify |
| flags. The following subset of flags is supported: |
| - bits[3:0] trigger type and level flags |
| 1 = low-to-high edge triggered |
| 2 = high-to-low edge triggered |
| 4 = active high level-sensitive |
| 8 = active low level-sensitive |
| Valid combinations are 1, 2, 3, 4, 8. |
| See also Documentation/devicetree/bindings/interrupt-controller/interrupts.txt |
| |
| - interrupt-controller: |
| Marks the device node as an interrupt controller |
| |
| - wakeup-source: |
| GPIOs for this controller can be used as a wakeup source |
| |
| Example: |
| upg_gio: gpio@f040a700 { |
| #gpio-cells = <2>; |
| #interrupt-cells = <2>; |
| compatible = "brcm,bcm7445-gpio", "brcm,brcmstb-gpio"; |
| gpio-controller; |
| interrupt-controller; |
| reg = <0xf040a700 0x80>; |
| interrupt-parent = <&irq0_intc>; |
| interrupts = <0x6>; |
| brcm,gpio-bank-widths = <32 32 32 24>; |
| }; |
| |
| upg_gio_aon: gpio@f04172c0 { |
| #gpio-cells = <2>; |
| #interrupt-cells = <2>; |
| compatible = "brcm,bcm7445-gpio", "brcm,brcmstb-gpio"; |
| gpio-controller; |
| interrupt-controller; |
| reg = <0xf04172c0 0x40>; |
| interrupt-parent = <&irq0_aon_intc>; |
| interrupts = <0x6>; |
| interrupts-extended = <&irq0_aon_intc 0x6>, |
| <&aon_pm_l2_intc 0x5>; |
| wakeup-source; |
| brcm,gpio-bank-widths = <18 4>; |
| }; |