Embest SBC8140, Руководство пользователя

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*/
.active_low = true,
},
{
.name = "led3",
.gpio = 139, /* gets replaced
*/
.active_low = true,
},
};
Associates GPIO 136 with led0 (system breath LED), GPIO 137 with led1,
GPIO 138 with led2, and GPIO 139 with led3; they are all valid upon a low
voltage level.
2. GPIO pinmux Configurations;
The file: sbc8140.h is saved under
/u-boot-03.00.02.07/board/timll/sbc8140/;
/*
* IEN - Input Enable
* IDIS - Input Disable
* PTD - Pull type Down
* PTU - Pull type Up
* DIS - Pull type selection is inactive
* EN - Pull type selection is active
* M0 - Mode 0
* The commented string gives the final mux configuration for
that pin
*/
MUX_VAL(CP(MMC2_DAT4), (IDIS | PTD | DIS | M4))
/*GPIO_136*/\
MUX_VAL(CP(MMC2_DAT5), (IDIS | PTD | DIS | M4))
/*GPIO_137*/\
MUX_VAL(CP(MMC2_DAT6), (IDIS | PTD | DIS | M4))
/*GPIO_138*/\
MUX_VAL(CP(MMC2_DAT7), (IDIS | PTU | DIS | M4))
/*GPIO_139*/\