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-ImgTec TZ1090 PDC pin controller
-
-Required properties:
-- compatible: "img,tz1090-pdc-pinctrl"
-- reg: Should contain the register physical address and length of the
- SOC_GPIO_CONTROL registers in the PDC register region.
-
-Please refer to pinctrl-bindings.txt in this directory for details of the
-common pinctrl bindings used by client devices, including the meaning of the
-phrase "pin configuration node".
-
-TZ1090-PDC's pin configuration nodes act as a container for an arbitrary number
-of subnodes. Each of these subnodes represents some desired configuration for a
-pin, a group, or a list of pins or groups. This configuration can include the
-mux function to select on those pin(s)/group(s), and various pin configuration
-parameters, such as pull-up, drive strength, etc.
-
-The name of each subnode is not important; all subnodes should be enumerated
-and processed purely based on their content.
-
-Each subnode only affects those parameters that are explicitly listed. In
-other words, a subnode that lists a mux function but no pin configuration
-parameters implies no information about any pin configuration parameters.
-Similarly, a pin subnode that describes a pullup parameter implies no
-information about e.g. the mux function. For this reason, even seemingly boolean
-values are actually tristates in this binding: unspecified, off, or on.
-Unspecified is represented as an absent property, and off/on are represented as
-integer values 0 and 1.
-
-Required subnode-properties:
-- tz1090,pins : An array of strings. Each string contains the name of a pin or
- group. Valid values for these names are listed below.
-
-Optional subnode-properties:
-- tz1090,function: A string containing the name of the function to mux to the
- pin or group. Valid values for function names are listed below, including
- which pingroups can be muxed to them.
-- supported generic pinconfig properties (for further details see
- Documentation/devicetree/bindings/pinctrl/pinctrl-bindings.txt):
- - bias-disable
- - bias-high-impedance
- - bias-bus-hold
- - bias-pull-up
- - bias-pull-down
- - input-schmitt-enable
- - input-schmitt-disable
- - drive-strength: Integer, control drive strength of pins in mA.
- 2: 2mA
- 4: 4mA
- 8: 8mA
- 12: 12mA
- - low-power-enable: Flag, power-on-start weak pull-down for invalid power.
- - low-power-disable: Flag, power-on-start weak pull-down disabled.
-
-Note that many of these properties are only valid for certain specific pins
-or groups. See the TZ1090 TRM for complete details regarding which groups
-support which functionality. The Linux pinctrl driver may also be a useful
-reference.
-
-Valid values for pin and group names are:
-
- pins:
-
- These all support bias-high-impediance, bias-pull-up, bias-pull-down, and
- bias-bus-hold (which can also be provided to any of the groups below to set
- it for all gpio pins in that group).
-
- gpio0, gpio1, sys_wake0, sys_wake1, sys_wake2, ir_data, ext_power.
-
- mux groups:
-
- These all support function.
-
- gpio0
- pins: gpio0.
- function: ir_mod_stable_out.
- gpio1
- pins: gpio1.
- function: ir_mod_power_out.
-
- drive groups:
-
- These support input-schmitt-enable, input-schmitt-disable,
- drive-strength, low-power-enable, and low-power-disable.
-
- pdc
- pins: gpio0, gpio1, sys_wake0, sys_wake1, sys_wake2, ir_data,
- ext_power.
-
-Example:
-
- pinctrl_pdc: pinctrl@2006500 {
- #gpio-range-cells = <3>;
- compatible = "img,tz1090-pdc-pinctrl";
- reg = <0x02006500 0x100>;
- };
-
-Example board file extracts:
-
- &pinctrl_pdc {
- pinctrl-names = "default";
- pinctrl-0 = <&syswake_default>;
-
- syswake_default: syswakes {
- syswake_cfg {
- tz1090,pins = "sys_wake0",
- "sys_wake1",
- "sys_wake2";
- pull-up;
- };
- };
- irmod_default: irmod {
- gpio0_cfg {
- tz1090,pins = "gpio0";
- tz1090,function = "ir_mod_stable_out";
- };
- gpio1_cfg {
- tz1090,pins = "gpio1";
- tz1090,function = "ir_mod_power_out";
- };
- };
- };
-
- ir: ir@2006200 {
- pinctrl-names = "default";
- pinctrl-0 = <&irmod_default>;
- };