1 One-register-per-pin type device tree based pinctrl driver
4 - compatible : "pinctrl-single" or "pinconf-single".
5 "pinctrl-single" means that pinconf isn't supported.
6 "pinconf-single" means that generic pinconf is supported.
8 - reg : offset and length of the register set for the mux registers
10 - #pinctrl-cells : number of cells in addition to the index, set to 1
11 for pinctrl-single,pins and 2 for pinctrl-single,bits
13 - pinctrl-single,register-width : pinmux register access width in bits
15 - pinctrl-single,function-mask : mask of allowed pinmux function bits
16 in the pinmux register
19 - pinctrl-single,function-off : function off mode for disabled state if
20 available and same for all registers; if not specified, disabling of
21 pin functions is ignored
23 - pinctrl-single,bit-per-mux : boolean to indicate that one register controls
24 more than one pin, for which "pinctrl-single,function-mask" property specifies
27 - pinctrl-single,drive-strength : array of value that are used to configure
28 drive strength in the pinmux register. They're value of drive strength
29 current and drive strength mask.
31 /* drive strength current, mask */
32 pinctrl-single,power-source = <0x30 0xf0>;
34 - pinctrl-single,bias-pullup : array of value that are used to configure the
35 input bias pullup in the pinmux register.
37 /* input, enabled pullup bits, disabled pullup bits, mask */
38 pinctrl-single,bias-pullup = <0 1 0 1>;
40 - pinctrl-single,bias-pulldown : array of value that are used to configure the
41 input bias pulldown in the pinmux register.
43 /* input, enabled pulldown bits, disabled pulldown bits, mask */
44 pinctrl-single,bias-pulldown = <2 2 0 2>;
46 * Two bits to control input bias pullup and pulldown: User should use
47 pinctrl-single,bias-pullup & pinctrl-single,bias-pulldown. One bit means
48 pullup, and the other one bit means pulldown.
49 * Three bits to control input bias enable, pullup and pulldown. User should
50 use pinctrl-single,bias-pullup & pinctrl-single,bias-pulldown. Input bias
51 enable bit should be included in pullup or pulldown bits.
52 * Although driver could set PIN_CONFIG_BIAS_DISABLE, there's no property as
53 pinctrl-single,bias-disable. Because pinctrl single driver could implement
54 it by calling pulldown, pullup disabled.
56 - pinctrl-single,input-schmitt : array of value that are used to configure
57 input schmitt in the pinmux register. In some silicons, there're two input
58 schmitt value (rising-edge & falling-edge) in the pinmux register.
60 /* input schmitt value, mask */
61 pinctrl-single,input-schmitt = <0x30 0x70>;
63 - pinctrl-single,input-schmitt-enable : array of value that are used to
64 configure input schmitt enable or disable in the pinmux register.
66 /* input, enable bits, disable bits, mask */
67 pinctrl-single,input-schmitt-enable = <0x30 0x40 0 0x70>;
69 - pinctrl-single,low-power-mode : array of value that are used to configure
70 low power mode of this pin. For some silicons, the low power mode will
71 control the output of the pin when the pad including the pin enter low
73 /* low power mode value, mask */
74 pinctrl-single,low-power-mode = <0x288 0x388>;
76 - pinctrl-single,gpio-range : list of value that are used to configure a GPIO
77 range. They're value of subnode phandle, pin base in pinctrl device, pin
78 number in this range, GPIO function value of this GPIO range.
79 The number of parameters is depend on #pinctrl-single,gpio-range-cells
82 /* pin base, nr pins & gpio function */
83 pinctrl-single,gpio-range = <&range 0 3 0 &range 3 9 1>;
85 - interrupt-controller : standard interrupt controller binding if using
86 interrupts for wake-up events for example. In this case pinctrl-single
87 is set up as a chained interrupt controller and the wake-up interrupts
88 can be requested by the drivers using request_irq().
90 - #interrupt-cells : standard interrupt binding if using interrupts
92 This driver assumes that there is only one register for each pin (unless the
93 pinctrl-single,bit-per-mux is set), and uses the common pinctrl bindings as
94 specified in the pinctrl-bindings.txt document in this directory.
96 The pin configuration nodes for pinctrl-single are specified as pinctrl
97 register offset and values using pinctrl-single,pins. Only the bits specified
98 in pinctrl-single,function-mask are updated.
100 When #pinctrl-cells = 1, then setting a pin for a device could be done with:
102 pinctrl-single,pins = <0xdc 0x118>;
104 Where 0xdc is the offset from the pinctrl register base address for the device
105 pinctrl register, and 0x118 contains the desired value of the pinctrl register.
107 When #pinctrl-cells = 2, then setting a pin for a device could be done with:
109 pinctrl-single,pins = <0xdc 0x30 0x07>;
111 Where 0x30 is the pin configuration value and 0x07 is the pin mux mode value.
112 These two values are OR'd together to produce the value stored at offset 0xdc.
113 See the device example and static board pins example below for more information.
115 In case when one register changes more than one pin's mux the
116 pinctrl-single,bits need to be used which takes three parameters:
118 pinctrl-single,bits = <0xdc 0x18 0xff>;
120 Where 0xdc is the offset from the pinctrl register base address for the
121 device pinctrl register, 0x18 is the desired value, and 0xff is the sub mask to
122 be used when applying this change to the register.
125 Optional sub-node: In case some pins could be configured as GPIO in the pinmux
126 register, those pins could be defined as a GPIO range. This sub-node is required
127 by pinctrl-single,gpio-range property.
129 Required properties in sub-node:
130 - #pinctrl-single,gpio-range-cells : the number of parameters after phandle in
131 pinctrl-single,gpio-range property.
134 #pinctrl-single,gpio-range-cells = <3>;
140 /* SoC common file */
142 /* first controller instance for pins in core domain */
143 pmx_core: pinmux@4a100040 {
144 compatible = "pinctrl-single";
145 reg = <0x4a100040 0x0196>;
146 #address-cells = <1>;
148 #interrupt-cells = <1>;
149 interrupt-controller;
150 pinctrl-single,register-width = <16>;
151 pinctrl-single,function-mask = <0xffff>;
154 /* second controller instance for pins in wkup domain */
155 pmx_wkup: pinmux@4a31e040 {
156 compatible = "pinctrl-single";
157 reg = <0x4a31e040 0x0038>;
158 #address-cells = <1>;
160 #interrupt-cells = <1>;
161 interrupt-controller;
162 pinctrl-single,register-width = <16>;
163 pinctrl-single,function-mask = <0xffff>;
166 control_devconf0: pinmux@48002274 {
167 compatible = "pinctrl-single";
168 reg = <0x48002274 4>; /* Single register */
169 #address-cells = <1>;
171 pinctrl-single,bit-per-mux;
172 pinctrl-single,register-width = <32>;
173 pinctrl-single,function-mask = <0x5F>;
176 /* third controller instance for pins in gpio domain */
177 pmx_gpio: pinmux@d401e000 {
178 compatible = "pinconf-single";
179 reg = <0xd401e000 0x0330>;
180 #address-cells = <1>;
184 pinctrl-single,register-width = <32>;
185 pinctrl-single,function-mask = <7>;
187 /* sparse GPIO range could be supported */
188 pinctrl-single,gpio-range = <&range 0 3 0 &range 3 9 1
189 &range 12 1 0 &range 13 29 1
190 &range 43 1 0 &range 44 49 1
191 &range 94 1 1 &range 96 2 1>;
194 #pinctrl-single,gpio-range-cells = <3>;
199 /* board specific .dts file */
204 * map all board specific static pins enabled by the pinctrl driver
205 * itself during the boot (or just set them up in the bootloader)
207 pinctrl-names = "default";
208 pinctrl-0 = <&board_pins>;
210 board_pins: pinmux_board_pins {
211 pinctrl-single,pins = <
219 uart0_pins: pinmux_uart0_pins {
220 pinctrl-single,pins = <
221 0x208 0 /* UART0_RXD (IOCFG138) */
222 0x20c 0 /* UART0_TXD (IOCFG139) */
224 pinctrl-single,bias-pulldown = <0 2 2>;
225 pinctrl-single,bias-pullup = <0 1 1>;
229 uart2_pins: pinmux_uart2_pins {
230 pinctrl-single,pins = <
240 mcbsp1_pins: pinmux_mcbsp1_pins {
241 pinctrl-single,bits = <
242 0x00 0x18 0x18 /* FSR/CLKR signal from FSX/CLKX pin */
246 mcbsp2_clks_pins: pinmux_mcbsp2_clks_pins {
247 pinctrl-single,bits = <
248 0x00 0x40 0x40 /* McBSP2 CLKS from McBSP_CLKS pin */
255 pinctrl-names = "default";
256 pinctrl-0 = <&uart0_pins>;
260 pinctrl-names = "default";
261 pinctrl-0 = <&uart2_pins>;