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[ARM] pxa: add MFP_LPM_KEEP_OUTPUT flag to pin config

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Some pins are expected to keep their last level during suspend, and
introduce MFP_LPM_KEEP_OUTPUT for this.

Signed-off-by: Eric Miao <eric.y.miao@gmail.com>
This commit is contained in:
Eric Miao 2010-01-11 21:25:15 +08:00
parent c8ee5c6951
commit 1106143d7a
2 changed files with 13 additions and 0 deletions
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2
arch/arm/mach-pxa/include/mach/mfp-pxa2xx.h
View file

@ -25,6 +25,8 @@
#define MFP_DIR(x) (((x) >> 23) & 0x1)
#define MFP_LPM_CAN_WAKEUP (0x1 << 24)
#define MFP_LPM_KEEP_OUTPUT (0x1 << 25)
#define WAKEUP_ON_EDGE_RISE (MFP_LPM_CAN_WAKEUP | MFP_LPM_EDGE_RISE)
#define WAKEUP_ON_EDGE_FALL (MFP_LPM_CAN_WAKEUP | MFP_LPM_EDGE_FALL)
#define WAKEUP_ON_EDGE_BOTH (MFP_LPM_CAN_WAKEUP | MFP_LPM_EDGE_BOTH)

11
arch/arm/mach-pxa/mfp-pxa2xx.c
View file

@ -328,6 +328,17 @@ static int pxa2xx_mfp_suspend(struct sys_device *d, pm_message_t state)
{
int i;
/* set corresponding PGSR bit of those marked MFP_LPM_KEEP_OUTPUT */
for (i = 0; i < pxa_last_gpio; i++) {
if ((gpio_desc[i].config & MFP_LPM_KEEP_OUTPUT) &&
(GPDR(i) & GPIO_bit(i))) {
if (GPLR(i) & GPIO_bit(i))
PGSR(i) |= GPIO_bit(i);
else
PGSR(i) &= ~GPIO_bit(i);
}
}
for (i = 0; i <= gpio_to_bank(pxa_last_gpio); i++) {
saved_gafr[0][i] = GAFR_L(i);