samsung.pin-function = < >;
0 : input
1 : output
2 : special function
samsung.pin-pud = < >;
0 : reserved
1 : pull down
2 : reserved
3 : pull up
samsung.pin-con-pdn = < >;
0 : output 0
1 : output 1
2 : input
3 : previous state
samsung.pin-pud-pdn = < >;
0 : pull up/down disable
1 : pull down
2 : reserved
3 : pull up
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