mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
synced 2024-11-24 20:53:07 +02:00
fc54b9bf15
(stable-branch of Openmoko) git-svn-id: svn://svn.openwrt.org/openwrt/trunk@13613 3c298f89-4303-0410-b956-a3cf2f4a3e73
124 lines
3.9 KiB
Diff
124 lines
3.9 KiB
Diff
From abb5807e67398d10a3014cc001897b11cc214ec9 Mon Sep 17 00:00:00 2001
|
|
From: Andy Green <andy@openmoko.com>
|
|
Date: Sun, 13 Jul 2008 20:31:04 +0100
|
|
Subject: [PATCH] fix-no-uart-leak-when-gps-off.patch
|
|
|
|
During the suspend current reduction campaign on suspend I
|
|
forced the GPS UART to be GPIO and to drive 0 into the GPS
|
|
unit so we would not burn current there. On resume it lets
|
|
the pins act as UARTs again. But really, we should do this
|
|
all the time that the GPS unit is off, lest we leak it
|
|
enough power to hold internal state and make trouble.
|
|
|
|
Signed-off-by: Andy Green <andy@openmoko.com>
|
|
---
|
|
arch/arm/plat-s3c24xx/neo1973_pm_gps.c | 57 +++++++++++++------------------
|
|
1 files changed, 24 insertions(+), 33 deletions(-)
|
|
|
|
diff --git a/arch/arm/plat-s3c24xx/neo1973_pm_gps.c b/arch/arm/plat-s3c24xx/neo1973_pm_gps.c
|
|
index 9c6adfa..8cd583d 100644
|
|
--- a/arch/arm/plat-s3c24xx/neo1973_pm_gps.c
|
|
+++ b/arch/arm/plat-s3c24xx/neo1973_pm_gps.c
|
|
@@ -272,9 +272,23 @@ static void gps_pwron_set(int on)
|
|
|
|
#ifdef CONFIG_MACH_NEO1973_GTA02
|
|
if (machine_is_neo1973_gta02()) {
|
|
- if (on)
|
|
+ if (on) {
|
|
pcf50633_voltage_set(pcf50633_global,
|
|
PCF50633_REGULATOR_LDO5, 3000);
|
|
+ /* 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);
|
|
+ }
|
|
pcf50633_onoff_set(pcf50633_global,
|
|
PCF50633_REGULATOR_LDO5, on);
|
|
}
|
|
@@ -284,21 +298,14 @@ static void gps_pwron_set(int on)
|
|
static int gps_pwron_get(void)
|
|
{
|
|
#ifdef CONFIG_MACH_NEO1973_GTA01
|
|
- if (machine_is_neo1973_gta01()) {
|
|
- if (s3c2410_gpio_getpin(GTA01_GPIO_GPS_PWRON))
|
|
- return 1;
|
|
- else
|
|
- return 0;
|
|
- }
|
|
+ if (machine_is_neo1973_gta01())
|
|
+ return !!s3c2410_gpio_getpin(GTA01_GPIO_GPS_PWRON);
|
|
#endif /* CONFIG_MACH_NEO1973_GTA01 */
|
|
|
|
#ifdef CONFIG_MACH_NEO1973_GTA02
|
|
- if (machine_is_neo1973_gta02()) {
|
|
- if (pcf50633_onoff_get(pcf50633_global, PCF50633_REGULATOR_LDO5))
|
|
- return 1;
|
|
- else
|
|
- return 0;
|
|
- }
|
|
+ if (machine_is_neo1973_gta02())
|
|
+ return !!pcf50633_onoff_get(pcf50633_global,
|
|
+ PCF50633_REGULATOR_LDO5);
|
|
#endif /* CONFIG_MACH_NEO1973_GTA02 */
|
|
return -1;
|
|
}
|
|
@@ -496,15 +503,8 @@ static int gta01_pm_gps_suspend(struct platform_device *pdev,
|
|
#endif /* CONFIG_MACH_NEO1973_GTA01 */
|
|
|
|
#ifdef CONFIG_MACH_NEO1973_GTA02
|
|
- if (machine_is_neo1973_gta02()) {
|
|
- /* take care not to power unpowered GPS from GPIO */
|
|
- 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);
|
|
-
|
|
+ if (machine_is_neo1973_gta02())
|
|
gps_pwron_set(0);
|
|
- }
|
|
#endif /* CONFIG_MACH_NEO1973_GTA02 */
|
|
|
|
return 0;
|
|
@@ -513,26 +513,17 @@ static int gta01_pm_gps_suspend(struct platform_device *pdev,
|
|
static int gta01_pm_gps_resume(struct platform_device *pdev)
|
|
{
|
|
#ifdef CONFIG_MACH_NEO1973_GTA01
|
|
- if (machine_is_neo1973_gta01()) {
|
|
+ if (machine_is_neo1973_gta01())
|
|
if (neo1973_gps.power_was_on)
|
|
gps_power_sequence_up();
|
|
- }
|
|
#endif /* CONFIG_MACH_NEO1973_GTA01 */
|
|
|
|
#ifdef CONFIG_MACH_NEO1973_GTA02
|
|
- if (machine_is_neo1973_gta02()) {
|
|
- /*
|
|
- * resume TXD1 function since we power GPS now... er..
|
|
- * WTF? FIXME We always power GPS on resume ??
|
|
- */
|
|
- s3c2410_gpio_cfgpin(S3C2410_GPH4, S3C2410_GPH4_TXD1);
|
|
- /* remove pulldown now it won't be floating any more */
|
|
- s3c2410_gpio_pullup(S3C2410_GPH5, 0);
|
|
-
|
|
+ if (machine_is_neo1973_gta02())
|
|
if (neo1973_gps.power_was_on)
|
|
gps_pwron_set(1);
|
|
#endif /* CONFIG_MACH_NEO1973_GTA02 */
|
|
- }
|
|
+
|
|
return 0;
|
|
}
|
|
#else
|
|
--
|
|
1.5.6.5
|
|
|