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
23 - pinctrl-single,drive-strength : array of value that are used to configure
24 drive strength in the pinmux register. They're value of drive strength
25 current and drive strength mask.
27 /* drive strength current, mask */
28 pinctrl-single,power-source = <0x30 0xf0>;
30 - pinctrl-single,bias-pullup : array of value that are used to configure the
31 input bias pullup in the pinmux register.
33 /* input, enabled pullup bits, disabled pullup bits, mask */
34 pinctrl-single,bias-pullup = <0 1 0 1>;
36 - pinctrl-single,bias-pulldown : array of value that are used to configure the
37 input bias pulldown in the pinmux register.
39 /* input, enabled pulldown bits, disabled pulldown bits, mask */
40 pinctrl-single,bias-pulldown = <2 2 0 2>;
42 * Two bits to control input bias pullup and pulldown: User should use
43 pinctrl-single,bias-pullup & pinctrl-single,bias-pulldown. One bit means
44 pullup, and the other one bit means pulldown.
45 * Three bits to control input bias enable, pullup and pulldown. User should
46 use pinctrl-single,bias-pullup & pinctrl-single,bias-pulldown. Input bias
47 enable bit should be included in pullup or pulldown bits.
48 * Although driver could set PIN_CONFIG_BIAS_DISABLE, there's no property as
49 pinctrl-single,bias-disable. Because pinctrl single driver could implement
50 it by calling pulldown, pullup disabled.
52 - pinctrl-single,input-schmitt : array of value that are used to configure
53 input schmitt in the pinmux register. In some silicons, there're two input
54 schmitt value (rising-edge & falling-edge) in the pinmux register.
56 /* input schmitt value, mask */
57 pinctrl-single,input-schmitt = <0x30 0x70>;
59 - pinctrl-single,input-schmitt-enable : array of value that are used to
60 configure input schmitt enable or disable in the pinmux register.
62 /* input, enable bits, disable bits, mask */
63 pinctrl-single,input-schmitt-enable = <0x30 0x40 0 0x70>;
65 - pinctrl-single,gpio-range : list of value that are used to configure a GPIO
66 range. They're value of subnode phandle, pin base in pinctrl device, pin
67 number in this range, GPIO function value of this GPIO range.
68 The number of parameters is depend on #pinctrl-single,gpio-range-cells
71 /* pin base, nr pins & gpio function */
72 pinctrl-single,gpio-range = <&range 0 3 0 &range 3 9 1>;
74 This driver assumes that there is only one register for each pin (unless the
75 pinctrl-single,bit-per-mux is set), and uses the common pinctrl bindings as
76 specified in the pinctrl-bindings.txt document in this directory.
78 The pin configuration nodes for pinctrl-single are specified as pinctrl
79 register offset and value pairs using pinctrl-single,pins. Only the bits
80 specified in pinctrl-single,function-mask are updated. For example, setting
81 a pin for a device could be done with:
83 pinctrl-single,pins = <0xdc 0x118>;
85 Where 0xdc is the offset from the pinctrl register base address for the
86 device pinctrl register, and 0x118 contains the desired value of the
87 pinctrl register. See the device example and static board pins example
88 below for more information.
90 In case when one register changes more than one pin's mux the
91 pinctrl-single,bits need to be used which takes three parameters:
93 pinctrl-single,bits = <0xdc 0x18, 0xff>;
95 Where 0xdc is the offset from the pinctrl register base address for the
96 device pinctrl register, 0x18 is the desired value, and 0xff is the sub mask to
97 be used when applying this change to the register.
100 Optional sub-node: In case some pins could be configured as GPIO in the pinmux
101 register, those pins could be defined as a GPIO range. This sub-node is required
102 by pinctrl-single,gpio-range property.
104 Required properties in sub-node:
105 - #pinctrl-single,gpio-range-cells : the number of parameters after phandle in
106 pinctrl-single,gpio-range property.
109 #pinctrl-single,gpio-range-cells = <3>;
115 /* SoC common file */
117 /* first controller instance for pins in core domain */
118 pmx_core: pinmux@4a100040 {
119 compatible = "pinctrl-single";
120 reg = <0x4a100040 0x0196>;
121 #address-cells = <1>;
123 pinctrl-single,register-width = <16>;
124 pinctrl-single,function-mask = <0xffff>;
127 /* second controller instance for pins in wkup domain */
128 pmx_wkup: pinmux@4a31e040 {
129 compatible = "pinctrl-single";
130 reg = <0x4a31e040 0x0038>;
131 #address-cells = <1>;
133 pinctrl-single,register-width = <16>;
134 pinctrl-single,function-mask = <0xffff>;
137 control_devconf0: pinmux@48002274 {
138 compatible = "pinctrl-single";
139 reg = <0x48002274 4>; /* Single register */
140 #address-cells = <1>;
142 pinctrl-single,bit-per-mux;
143 pinctrl-single,register-width = <32>;
144 pinctrl-single,function-mask = <0x5F>;
147 /* third controller instance for pins in gpio domain */
148 pmx_gpio: pinmux@d401e000 {
149 compatible = "pinconf-single";
150 reg = <0xd401e000 0x0330>;
151 #address-cells = <1>;
155 pinctrl-single,register-width = <32>;
156 pinctrl-single,function-mask = <7>;
158 /* sparse GPIO range could be supported */
159 pinctrl-single,gpio-range = <&range 0 3 0 &range 3 9 1
160 &range 12 1 0 &range 13 29 1
161 &range 43 1 0 &range 44 49 1
162 &range 94 1 1 &range 96 2 1>;
165 #pinctrl-single,gpio-range-cells = <3>;
170 /* board specific .dts file */
175 * map all board specific static pins enabled by the pinctrl driver
176 * itself during the boot (or just set them up in the bootloader)
178 pinctrl-names = "default";
179 pinctrl-0 = <&board_pins>;
181 board_pins: pinmux_board_pins {
182 pinctrl-single,pins = <
190 uart0_pins: pinmux_uart0_pins {
191 pinctrl-single,pins = <
192 0x208 0 /* UART0_RXD (IOCFG138) */
193 0x20c 0 /* UART0_TXD (IOCFG139) */
195 pinctrl-single,bias-pulldown = <0 2 2>;
196 pinctrl-single,bias-pullup = <0 1 1>;
200 uart2_pins: pinmux_uart2_pins {
201 pinctrl-single,pins = <
211 mcbsp1_pins: pinmux_mcbsp1_pins {
212 pinctrl-single,bits = <
213 0x00 0x18 0x18 /* FSR/CLKR signal from FSX/CLKX pin */
217 mcbsp2_clks_pins: pinmux_mcbsp2_clks_pins {
218 pinctrl-single,bits = <
219 0x00 0x40 0x40 /* McBSP2 CLKS from McBSP_CLKS pin */
226 pinctrl-names = "default";
227 pinctrl-0 = <&uart0_pins>;
231 pinctrl-names = "default";
232 pinctrl-0 = <&uart2_pins>;