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Somebody in the thread at some point said:
| On Sun, Feb 22, 2009 at 06:48:16AM +0000, Andy Green wrote:
|
|> Second, when GSM is OFF, it changes the RTS and TXD pins on
|> UART 0 to be inputs, instead of driving into a dead subsystem
|> and costing us ~70mA @ 5V constant dissipation (these 3.3V pins
|> were found at 1.5V due to that).
|
| Just wondering: Do we have the same problem with the GPS port?
It's a good thought, but it looks like somebody (from the comments,
myself) took care of it:
if (machine_is_neo1973_gta02()) {
if (on) {
/* return UART pins to being UART pins */
s3c2410_gpio_cfgpin(S3C2410_GPH4, S3C2410_GPH4_TXD1);
/* remove pulldown now it won't be floating any more */
s3c2410_gpio_pullup(S3C2410_GPH5, 0);
} else {
/*
* take care not to power unpowered GPS from UART TX
* return them to GPIO and force low
*/
s3c2410_gpio_cfgpin(S3C2410_GPH4, S3C2410_GPH4_OUTP);
s3c2410_gpio_setpin(S3C2410_GPH4, 0);
/* don't let RX from unpowered GPS float */
s3c2410_gpio_pullup(S3C2410_GPH5, 1);
}
- -Andy
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