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-* ZTE ZX Pin Controller
-
-The pin controller on ZTE ZX platforms is kinda of hybrid. It consists of
-a main controller and an auxiliary one. For example, on ZX296718 SoC, the
-main controller is TOP_PMM and the auxiliary one is AON_IOCFG. Both
-controllers work together to control pin multiplexing and configuration in
-the way illustrated as below.
-
-
- GMII_RXD3 ---+
- |
- DVI1_HS ---+----------------------------- GMII_RXD3 (TOP pin)
- |
- BGPIO16 ---+ ^
- | pinconf
- ^ |
- | pinmux |
- | |
-
- TOP_PMM (main) AON_IOCFG (aux)
-
- | | |
- | pinmux | |
- | pinmux v |
- v | pinconf
- KEY_ROW2 ---+ v
- PORT1_LCD_TE ---+ |
- | AGPIO10 ---+------ KEY_ROW2 (AON pin)
- I2S0_DOUT3 ---+ |
- |-----------------------+
- PWM_OUT3 ---+
- |
- VGA_VS1 ---+
-
-
-For most of pins like GMII_RXD3 in the figure, the pinmux function is
-controlled by TOP_PMM block only, and this type of pins are meant by term
-'TOP pins'. For pins like KEY_ROW2, the pinmux is controlled by both
-TOP_PMM and AON_IOCFG blocks, as the available multiplexing functions for
-the pin spread in both controllers. This type of pins are called 'AON pins'.
-Though pinmux implementation is quite different, pinconf is same for both
-types of pins. Both are controlled by auxiliary controller, i.e. AON_IOCFG
-on ZX296718.
-
-Required properties:
-- compatible: should be "zte,zx296718-pmm".
-- reg: the register physical address and length.
-- zte,auxiliary-controller: phandle to the auxiliary pin controller which
- implements pinmux for AON pins and pinconf for all pins.
-
-The following pin configuration are supported. Please refer to
-pinctrl-bindings.txt in this directory for more details of the common
-pinctrl bindings used by client devices.
-
-- bias-pull-up
-- bias-pull-down
-- drive-strength
-- input-enable
-- slew-rate
-
-Examples:
-
-iocfg: pin-controller@119000 {
- compatible = "zte,zx296718-iocfg";
- reg = <0x119000 0x1000>;
-};
-
-pmm: pin-controller@1462000 {
- compatible = "zte,zx296718-pmm";
- reg = <0x1462000 0x1000>;
- zte,auxiliary-controller = <&iocfg>;
-};
-
-&pmm {
- vga_pins: vga {
- pins = "KEY_COL1", "KEY_COL2", "KEY_ROW1", "KEY_ROW2";
- function = "VGA";
- };
-};
-
-&vga {
- pinctrl-names = "default";
- pinctrl-0 = <&vga_pins>;
-};