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-single,register-width : pinmux register access width in bits
12 - pinctrl-single,function-mask : mask of allowed pinmux function bits
13 in the pinmux register
16 - pinctrl-single,function-off : function off mode for disabled state if
17 available and same for all registers; if not specified, disabling of
18 pin functions is ignored
20 - pinctrl-single,bit-per-mux : boolean to indicate that one register controls
21 more than one pin, for which "pinctrl-single,function-mask" property specifies
24 - pinctrl-single,drive-strength : array of value that are used to configure
25 drive strength in the pinmux register. They're value of drive strength
26 current and drive strength mask.
28 /* drive strength current, mask */
29 pinctrl-single,power-source = <0x30 0xf0>;
31 - pinctrl-single,bias-pullup : array of value that are used to configure the
32 input bias pullup in the pinmux register.
34 /* input, enabled pullup bits, disabled pullup bits, mask */
35 pinctrl-single,bias-pullup = <0 1 0 1>;
37 - pinctrl-single,bias-pulldown : array of value that are used to configure the
38 input bias pulldown in the pinmux register.
40 /* input, enabled pulldown bits, disabled pulldown bits, mask */
41 pinctrl-single,bias-pulldown = <2 2 0 2>;
43 * Two bits to control input bias pullup and pulldown: User should use
44 pinctrl-single,bias-pullup & pinctrl-single,bias-pulldown. One bit means
45 pullup, and the other one bit means pulldown.
46 * Three bits to control input bias enable, pullup and pulldown. User should
47 use pinctrl-single,bias-pullup & pinctrl-single,bias-pulldown. Input bias
48 enable bit should be included in pullup or pulldown bits.
49 * Although driver could set PIN_CONFIG_BIAS_DISABLE, there's no property as
50 pinctrl-single,bias-disable. Because pinctrl single driver could implement
51 it by calling pulldown, pullup disabled.
53 - pinctrl-single,input-schmitt : array of value that are used to configure
54 input schmitt in the pinmux register. In some silicons, there're two input
55 schmitt value (rising-edge & falling-edge) in the pinmux register.
57 /* input schmitt value, mask */
58 pinctrl-single,input-schmitt = <0x30 0x70>;
60 - pinctrl-single,input-schmitt-enable : array of value that are used to
61 configure input schmitt enable or disable in the pinmux register.
63 /* input, enable bits, disable bits, mask */
64 pinctrl-single,input-schmitt-enable = <0x30 0x40 0 0x70>;
66 - pinctrl-single,low-power-mode : array of value that are used to configure
67 low power mode of this pin. For some silicons, the low power mode will
68 control the output of the pin when the pad including the pin enter low
70 /* low power mode value, mask */
71 pinctrl-single,low-power-mode = <0x288 0x388>;
73 - pinctrl-single,gpio-range : list of value that are used to configure a GPIO
74 range. They're value of subnode phandle, pin base in pinctrl device, pin
75 number in this range, GPIO function value of this GPIO range.
76 The number of parameters is depend on #pinctrl-single,gpio-range-cells
79 /* pin base, nr pins & gpio function */
80 pinctrl-single,gpio-range = <&range 0 3 0 &range 3 9 1>;
82 - interrupt-controller : standard interrupt controller binding if using
83 interrupts for wake-up events for example. In this case pinctrl-single
84 is set up as a chained interrupt controller and the wake-up interrupts
85 can be requested by the drivers using request_irq().
87 - #interrupt-cells : standard interrupt binding if using interrupts
89 This driver assumes that there is only one register for each pin (unless the
90 pinctrl-single,bit-per-mux is set), and uses the common pinctrl bindings as
91 specified in the pinctrl-bindings.txt document in this directory.
93 The pin configuration nodes for pinctrl-single are specified as pinctrl
94 register offset and value pairs using pinctrl-single,pins. Only the bits
95 specified in pinctrl-single,function-mask are updated. For example, setting
96 a pin for a device could be done with:
98 pinctrl-single,pins = <0xdc 0x118>;
100 Where 0xdc is the offset from the pinctrl register base address for the
101 device pinctrl register, and 0x118 contains the desired value of the
102 pinctrl register. See the device example and static board pins example
103 below for more information.
105 In case when one register changes more than one pin's mux the
106 pinctrl-single,bits need to be used which takes three parameters:
108 pinctrl-single,bits = <0xdc 0x18 0xff>;
110 Where 0xdc is the offset from the pinctrl register base address for the
111 device pinctrl register, 0x18 is the desired value, and 0xff is the sub mask to
112 be used when applying this change to the register.
115 Optional sub-node: In case some pins could be configured as GPIO in the pinmux
116 register, those pins could be defined as a GPIO range. This sub-node is required
117 by pinctrl-single,gpio-range property.
119 Required properties in sub-node:
120 - #pinctrl-single,gpio-range-cells : the number of parameters after phandle in
121 pinctrl-single,gpio-range property.
124 #pinctrl-single,gpio-range-cells = <3>;
130 /* SoC common file */
132 /* first controller instance for pins in core domain */
133 pmx_core: pinmux@4a100040 {
134 compatible = "pinctrl-single";
135 reg = <0x4a100040 0x0196>;
136 #address-cells = <1>;
138 #interrupt-cells = <1>;
139 interrupt-controller;
140 pinctrl-single,register-width = <16>;
141 pinctrl-single,function-mask = <0xffff>;
144 /* second controller instance for pins in wkup domain */
145 pmx_wkup: pinmux@4a31e040 {
146 compatible = "pinctrl-single";
147 reg = <0x4a31e040 0x0038>;
148 #address-cells = <1>;
150 #interrupt-cells = <1>;
151 interrupt-controller;
152 pinctrl-single,register-width = <16>;
153 pinctrl-single,function-mask = <0xffff>;
156 control_devconf0: pinmux@48002274 {
157 compatible = "pinctrl-single";
158 reg = <0x48002274 4>; /* Single register */
159 #address-cells = <1>;
161 pinctrl-single,bit-per-mux;
162 pinctrl-single,register-width = <32>;
163 pinctrl-single,function-mask = <0x5F>;
166 /* third controller instance for pins in gpio domain */
167 pmx_gpio: pinmux@d401e000 {
168 compatible = "pinconf-single";
169 reg = <0xd401e000 0x0330>;
170 #address-cells = <1>;
174 pinctrl-single,register-width = <32>;
175 pinctrl-single,function-mask = <7>;
177 /* sparse GPIO range could be supported */
178 pinctrl-single,gpio-range = <&range 0 3 0 &range 3 9 1
179 &range 12 1 0 &range 13 29 1
180 &range 43 1 0 &range 44 49 1
181 &range 94 1 1 &range 96 2 1>;
184 #pinctrl-single,gpio-range-cells = <3>;
189 /* board specific .dts file */
194 * map all board specific static pins enabled by the pinctrl driver
195 * itself during the boot (or just set them up in the bootloader)
197 pinctrl-names = "default";
198 pinctrl-0 = <&board_pins>;
200 board_pins: pinmux_board_pins {
201 pinctrl-single,pins = <
209 uart0_pins: pinmux_uart0_pins {
210 pinctrl-single,pins = <
211 0x208 0 /* UART0_RXD (IOCFG138) */
212 0x20c 0 /* UART0_TXD (IOCFG139) */
214 pinctrl-single,bias-pulldown = <0 2 2>;
215 pinctrl-single,bias-pullup = <0 1 1>;
219 uart2_pins: pinmux_uart2_pins {
220 pinctrl-single,pins = <
230 mcbsp1_pins: pinmux_mcbsp1_pins {
231 pinctrl-single,bits = <
232 0x00 0x18 0x18 /* FSR/CLKR signal from FSX/CLKX pin */
236 mcbsp2_clks_pins: pinmux_mcbsp2_clks_pins {
237 pinctrl-single,bits = <
238 0x00 0x40 0x40 /* McBSP2 CLKS from McBSP_CLKS pin */
245 pinctrl-names = "default";
246 pinctrl-0 = <&uart0_pins>;
250 pinctrl-names = "default";
251 pinctrl-0 = <&uart2_pins>;