diff options
Diffstat (limited to 'Documentation/devicetree')
3 files changed, 126 insertions, 4 deletions
diff --git a/Documentation/devicetree/bindings/gpio/gpio.txt b/Documentation/devicetree/bindings/gpio/gpio.txt index a33628759d36..d933af370697 100644 --- a/Documentation/devicetree/bindings/gpio/gpio.txt +++ b/Documentation/devicetree/bindings/gpio/gpio.txt @@ -98,7 +98,7 @@ announce the pinrange to the pin ctrl subsystem. For example, compatible = "fsl,qe-pario-bank-e", "fsl,qe-pario-bank"; reg = <0x1460 0x18>; gpio-controller; - gpio-ranges = <&pinctrl1 20 10>, <&pinctrl2 50 20>; + gpio-ranges = <&pinctrl1 0 20 10>, <&pinctrl2 10 50 20>; } @@ -107,8 +107,8 @@ where, Next values specify the base pin and number of pins for the range handled by 'qe_pio_e' gpio. In the given example from base pin 20 to - pin 29 under pinctrl1 and pin 50 to pin 69 under pinctrl2 is handled - by this gpio controller. + pin 29 under pinctrl1 with gpio offset 0 and pin 50 to pin 69 under + pinctrl2 with gpio offset 10 is handled by this gpio controller. The pinctrl node must have "#gpio-range-cells" property to show number of arguments to pass with phandle from gpio controllers node. diff --git a/Documentation/devicetree/bindings/pinctrl/pinctrl-single.txt b/Documentation/devicetree/bindings/pinctrl/pinctrl-single.txt index 2c81e45f1374..fa1746b639b9 100644 --- a/Documentation/devicetree/bindings/pinctrl/pinctrl-single.txt +++ b/Documentation/devicetree/bindings/pinctrl/pinctrl-single.txt @@ -1,7 +1,9 @@ One-register-per-pin type device tree based pinctrl driver Required properties: -- compatible : "pinctrl-single" +- compatible : "pinctrl-single" or "pinconf-single". + "pinctrl-single" means that pinconf isn't supported. + "pinconf-single" means that generic pinconf is supported. - reg : offset and length of the register set for the mux registers @@ -14,9 +16,61 @@ Optional properties: - pinctrl-single,function-off : function off mode for disabled state if available and same for all registers; if not specified, disabling of pin functions is ignored + - pinctrl-single,bit-per-mux : boolean to indicate that one register controls more than one pin +- pinctrl-single,drive-strength : array of value that are used to configure + drive strength in the pinmux register. They're value of drive strength + current and drive strength mask. + + /* drive strength current, mask */ + pinctrl-single,power-source = <0x30 0xf0>; + +- pinctrl-single,bias-pullup : array of value that are used to configure the + input bias pullup in the pinmux register. + + /* input, enabled pullup bits, disabled pullup bits, mask */ + pinctrl-single,bias-pullup = <0 1 0 1>; + +- pinctrl-single,bias-pulldown : array of value that are used to configure the + input bias pulldown in the pinmux register. + + /* input, enabled pulldown bits, disabled pulldown bits, mask */ + pinctrl-single,bias-pulldown = <2 2 0 2>; + + * Two bits to control input bias pullup and pulldown: User should use + pinctrl-single,bias-pullup & pinctrl-single,bias-pulldown. One bit means + pullup, and the other one bit means pulldown. + * Three bits to control input bias enable, pullup and pulldown. User should + use pinctrl-single,bias-pullup & pinctrl-single,bias-pulldown. Input bias + enable bit should be included in pullup or pulldown bits. + * Although driver could set PIN_CONFIG_BIAS_DISABLE, there's no property as + pinctrl-single,bias-disable. Because pinctrl single driver could implement + it by calling pulldown, pullup disabled. + +- pinctrl-single,input-schmitt : array of value that are used to configure + input schmitt in the pinmux register. In some silicons, there're two input + schmitt value (rising-edge & falling-edge) in the pinmux register. + + /* input schmitt value, mask */ + pinctrl-single,input-schmitt = <0x30 0x70>; + +- pinctrl-single,input-schmitt-enable : array of value that are used to + configure input schmitt enable or disable in the pinmux register. + + /* input, enable bits, disable bits, mask */ + pinctrl-single,input-schmitt-enable = <0x30 0x40 0 0x70>; + +- pinctrl-single,gpio-range : list of value that are used to configure a GPIO + range. They're value of subnode phandle, pin base in pinctrl device, pin + number in this range, GPIO function value of this GPIO range. + The number of parameters is depend on #pinctrl-single,gpio-range-cells + property. + + /* pin base, nr pins & gpio function */ + pinctrl-single,gpio-range = <&range 0 3 0 &range 3 9 1>; + This driver assumes that there is only one register for each pin (unless the pinctrl-single,bit-per-mux is set), and uses the common pinctrl bindings as specified in the pinctrl-bindings.txt document in this directory. @@ -42,6 +96,20 @@ Where 0xdc is the offset from the pinctrl register base address for the device pinctrl register, 0x18 is the desired value, and 0xff is the sub mask to be used when applying this change to the register. + +Optional sub-node: In case some pins could be configured as GPIO in the pinmux +register, those pins could be defined as a GPIO range. This sub-node is required +by pinctrl-single,gpio-range property. + +Required properties in sub-node: +- #pinctrl-single,gpio-range-cells : the number of parameters after phandle in + pinctrl-single,gpio-range property. + + range: gpio-range { + #pinctrl-single,gpio-range-cells = <3>; + }; + + Example: /* SoC common file */ @@ -76,6 +144,29 @@ control_devconf0: pinmux@48002274 { pinctrl-single,function-mask = <0x5F>; }; +/* third controller instance for pins in gpio domain */ +pmx_gpio: pinmux@d401e000 { + compatible = "pinconf-single"; + reg = <0xd401e000 0x0330>; + #address-cells = <1>; + #size-cells = <1>; + ranges; + + pinctrl-single,register-width = <32>; + pinctrl-single,function-mask = <7>; + + /* sparse GPIO range could be supported */ + pinctrl-single,gpio-range = <&range 0 3 0 &range 3 9 1 + &range 12 1 0 &range 13 29 1 + &range 43 1 0 &range 44 49 1 + &range 94 1 1 &range 96 2 1>; + + range: gpio-range { + #pinctrl-single,gpio-range-cells = <3>; + }; +}; + + /* board specific .dts file */ &pmx_core { @@ -96,6 +187,15 @@ control_devconf0: pinmux@48002274 { >; }; + uart0_pins: pinmux_uart0_pins { + pinctrl-single,pins = < + 0x208 0 /* UART0_RXD (IOCFG138) */ + 0x20c 0 /* UART0_TXD (IOCFG139) */ + >; + pinctrl-single,bias-pulldown = <0 2 2>; + pinctrl-single,bias-pullup = <0 1 1>; + }; + /* map uart2 pins */ uart2_pins: pinmux_uart2_pins { pinctrl-single,pins = < @@ -122,6 +222,11 @@ control_devconf0: pinmux@48002274 { }; +&uart1 { + pinctrl-names = "default"; + pinctrl-0 = <&uart0_pins>; +}; + &uart2 { pinctrl-names = "default"; pinctrl-0 = <&uart2_pins>; diff --git a/Documentation/devicetree/bindings/timer/cadence,ttc-timer.txt b/Documentation/devicetree/bindings/timer/cadence,ttc-timer.txt new file mode 100644 index 000000000000..993695c659e1 --- /dev/null +++ b/Documentation/devicetree/bindings/timer/cadence,ttc-timer.txt @@ -0,0 +1,17 @@ +Cadence TTC - Triple Timer Counter + +Required properties: +- compatible : Should be "cdns,ttc". +- reg : Specifies base physical address and size of the registers. +- interrupts : A list of 3 interrupts; one per timer channel. +- clocks: phandle to the source clock + +Example: + +ttc0: ttc0@f8001000 { + interrupt-parent = <&intc>; + interrupts = < 0 10 4 0 11 4 0 12 4 >; + compatible = "cdns,ttc"; + reg = <0xF8001000 0x1000>; + clocks = <&cpu_clk 3>; +}; |