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 value pairs using pinctrl-single,pins. Only the bits
98 specified in pinctrl-single,function-mask are updated. For example, setting
99 a pin for a device could be done with:
101 pinctrl-single,pins = <0xdc 0x118>;
103 Where 0xdc is the offset from the pinctrl register base address for the
104 device pinctrl register, and 0x118 contains the desired value of the
105 pinctrl register. See the device example and static board pins example
106 below for more information.
108 In case when one register changes more than one pin's mux the
109 pinctrl-single,bits need to be used which takes three parameters:
111 pinctrl-single,bits = <0xdc 0x18 0xff>;
113 Where 0xdc is the offset from the pinctrl register base address for the
114 device pinctrl register, 0x18 is the desired value, and 0xff is the sub mask to
115 be used when applying this change to the register.
118 Optional sub-node: In case some pins could be configured as GPIO in the pinmux
119 register, those pins could be defined as a GPIO range. This sub-node is required
120 by pinctrl-single,gpio-range property.
122 Required properties in sub-node:
123 - #pinctrl-single,gpio-range-cells : the number of parameters after phandle in
124 pinctrl-single,gpio-range property.
127 #pinctrl-single,gpio-range-cells = <3>;
133 /* SoC common file */
135 /* first controller instance for pins in core domain */
136 pmx_core: pinmux@4a100040 {
137 compatible = "pinctrl-single";
138 reg = <0x4a100040 0x0196>;
139 #address-cells = <1>;
141 #interrupt-cells = <1>;
142 interrupt-controller;
143 pinctrl-single,register-width = <16>;
144 pinctrl-single,function-mask = <0xffff>;
147 /* second controller instance for pins in wkup domain */
148 pmx_wkup: pinmux@4a31e040 {
149 compatible = "pinctrl-single";
150 reg = <0x4a31e040 0x0038>;
151 #address-cells = <1>;
153 #interrupt-cells = <1>;
154 interrupt-controller;
155 pinctrl-single,register-width = <16>;
156 pinctrl-single,function-mask = <0xffff>;
159 control_devconf0: pinmux@48002274 {
160 compatible = "pinctrl-single";
161 reg = <0x48002274 4>; /* Single register */
162 #address-cells = <1>;
164 pinctrl-single,bit-per-mux;
165 pinctrl-single,register-width = <32>;
166 pinctrl-single,function-mask = <0x5F>;
169 /* third controller instance for pins in gpio domain */
170 pmx_gpio: pinmux@d401e000 {
171 compatible = "pinconf-single";
172 reg = <0xd401e000 0x0330>;
173 #address-cells = <1>;
177 pinctrl-single,register-width = <32>;
178 pinctrl-single,function-mask = <7>;
180 /* sparse GPIO range could be supported */
181 pinctrl-single,gpio-range = <&range 0 3 0 &range 3 9 1
182 &range 12 1 0 &range 13 29 1
183 &range 43 1 0 &range 44 49 1
184 &range 94 1 1 &range 96 2 1>;
187 #pinctrl-single,gpio-range-cells = <3>;
192 /* board specific .dts file */
197 * map all board specific static pins enabled by the pinctrl driver
198 * itself during the boot (or just set them up in the bootloader)
200 pinctrl-names = "default";
201 pinctrl-0 = <&board_pins>;
203 board_pins: pinmux_board_pins {
204 pinctrl-single,pins = <
212 uart0_pins: pinmux_uart0_pins {
213 pinctrl-single,pins = <
214 0x208 0 /* UART0_RXD (IOCFG138) */
215 0x20c 0 /* UART0_TXD (IOCFG139) */
217 pinctrl-single,bias-pulldown = <0 2 2>;
218 pinctrl-single,bias-pullup = <0 1 1>;
222 uart2_pins: pinmux_uart2_pins {
223 pinctrl-single,pins = <
233 mcbsp1_pins: pinmux_mcbsp1_pins {
234 pinctrl-single,bits = <
235 0x00 0x18 0x18 /* FSR/CLKR signal from FSX/CLKX pin */
239 mcbsp2_clks_pins: pinmux_mcbsp2_clks_pins {
240 pinctrl-single,bits = <
241 0x00 0x40 0x40 /* McBSP2 CLKS from McBSP_CLKS pin */
248 pinctrl-names = "default";
249 pinctrl-0 = <&uart0_pins>;
253 pinctrl-names = "default";
254 pinctrl-0 = <&uart2_pins>;