bindings/pinctrl/sprd%2Cpinctrl.txt

6 register contains several bit fields with one bit or several bits
7 to configure for some global common configuration, such as domain
9 driving level": One pin can output 3.0v or 1.8v, depending on the
12 to choose one function (like: UART0) for which system, since we
13 have several systems (AP/CP/CM4) on one SoC.).
16 of them, so we can not make every Spreadtrum-special configuration
17 as one generic configuration, and maybe it will add more strange
18 global configuration in future. Then we add one "sprd,control" to
22 Moreover we recognise every fields comprising one bit or several
23 bits in one global control register as one pin, thus we should
24 record every pin's bit offset, bit width and register offset to
28 register definition, and each register described one pin is used
29 to configure the pin sleep mode, function select and sleep related
35 - input-enable
36 - input-disable
37 - output-high
38 - output-low
39 - bias-pull-up
40 - bias-pull-down
43 configuration, to set the pin sleep related configuration automatically
46 and set the pin sleep related configuration as "input-enable", which
54 "sprd,sleep-mode" property to set pin sleep mode.
57 register definition, and each register described one pin is used to
62 - compatible: "sprd,<soc>-pinctrl"
63   Please refer to each sprd,<soc>-pinctrl.txt binding doc for supported SoCs.
64 - reg: The register address of pin controller device.
65 - pins : An array of pin names.
68 - function: Specified the function name.
69 - drive-strength: Drive strength in mA.
70 - input-schmitt-disable: Enable schmitt-trigger mode.
71 - input-schmitt-enable: Disable schmitt-trigger mode.
72 - bias-disable: Disable pin bias.
73 - bias-pull-down: Pull down on pin.
74 - bias-pull-up: Pull up on pin.
75 - input-enable: Enable pin input.
76 - input-disable: Enable pin output.
77 - output-high: Set the pin as an output level high.
78 - output-low: Set the pin as an output level low.
79 - sleep-hardware-state: Indicate these configs in this state are sleep related.
80 - sprd,control: Control values referring to databook for global control pins.
81 - sprd,sleep-mode: Sleep mode selection.
83 Please refer to each sprd,<soc>-pinctrl.txt binding doc for supported values.