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Diffstat (limited to 'target/linux/s3c24xx/patches-2.6.24/1114-Enable-GPS-only-if-it-was-powered-on-before-suspendi.patch')
-rw-r--r--target/linux/s3c24xx/patches-2.6.24/1114-Enable-GPS-only-if-it-was-powered-on-before-suspendi.patch85
1 files changed, 85 insertions, 0 deletions
diff --git a/target/linux/s3c24xx/patches-2.6.24/1114-Enable-GPS-only-if-it-was-powered-on-before-suspendi.patch b/target/linux/s3c24xx/patches-2.6.24/1114-Enable-GPS-only-if-it-was-powered-on-before-suspendi.patch
new file mode 100644
index 0000000000..4ba9ea3120
--- /dev/null
+++ b/target/linux/s3c24xx/patches-2.6.24/1114-Enable-GPS-only-if-it-was-powered-on-before-suspendi.patch
@@ -0,0 +1,85 @@
+From d685e208663ffc9bd454af6698cb2945e60a3ba8 Mon Sep 17 00:00:00 2001
+From: Holger Freyther <zecke@openmoko.org>
+Date: Sun, 13 Apr 2008 07:25:55 +0100
+Subject: [PATCH] Enable GPS only if it was powered on before suspending the device
+
+ Similar to the neo1974_pm_gsm.c keep a static struct around. On suspend
+ we will save the current power state, on resume we will use this
+ information to enable power of the GPS only when it was powered on before.
+ This is passing basic tests with screen /dev/ttySAC1 on suspend and resume.
+
+ Only do this for the GTA02 as I don't have a gllin setup for the GTA01
+
+ I wonder why the suspend and resume code is not using gps_pwron_set and why
+ for the GTA02 we need to keep the state of the GPIOs, this should be done
+ by the s3c code.
+
+Signed-Off-by: Holger Frether <zecke@openmoko.org>
+---
+ arch/arm/plat-s3c24xx/neo1973_pm_gps.c | 22 ++++++++++++++--------
+ 1 files changed, 14 insertions(+), 8 deletions(-)
+
+diff --git a/arch/arm/plat-s3c24xx/neo1973_pm_gps.c b/arch/arm/plat-s3c24xx/neo1973_pm_gps.c
+index e8cfb96..b12f7bc 100644
+--- a/arch/arm/plat-s3c24xx/neo1973_pm_gps.c
++++ b/arch/arm/plat-s3c24xx/neo1973_pm_gps.c
+@@ -30,6 +30,12 @@
+ #include <linux/pcf50633.h>
+ #endif
+
++struct neo1973_pm_gps_data {
++ int power_was_on;
++};
++
++static struct neo1973_pm_gps_data neo1973_gps;
++
+ /* This is the 2.8V supply for the RTC crystal, the mail clock crystal and
+ * the input to VDD_RF */
+ static void gps_power_2v8_set(int on)
+@@ -266,8 +272,8 @@ static void gps_pwron_set(int on)
+ if (on)
+ pcf50633_voltage_set(pcf50633_global,
+ PCF50633_REGULATOR_LDO5, 3000);
+- pcf50633_onoff_set(pcf50633_global,
+- PCF50633_REGULATOR_LDO5, on);
++ pcf50633_onoff_set(pcf50633_global,
++ PCF50633_REGULATOR_LDO5, on);
+ }
+ #endif /* CONFIG_MACH_NEO1973_GTA02 */
+ }
+@@ -476,6 +482,9 @@ static DEVICE_ATTR(power_sequence, 0644, power_sequence_read,
+ static int gta01_pm_gps_suspend(struct platform_device *pdev,
+ pm_message_t state)
+ {
++
++ neo1973_gps.power_was_on = gps_pwron_get();
++
+ #ifdef CONFIG_MACH_NEO1973_GTA01
+ if (machine_is_neo1973_gta01()) {
+ /* FIXME */
+@@ -491,9 +500,7 @@ static int gta01_pm_gps_suspend(struct platform_device *pdev,
+ /* don't let RX from unpowered GPS float */
+ s3c2410_gpio_pullup(S3C2410_GPH5, 1);
+
+- /* FIXME */
+- pcf50633_onoff_set(pcf50633_global,
+- PCF50633_REGULATOR_LDO5, 0);
++ gps_pwron_set(0);
+ }
+ #endif /* CONFIG_MACH_NEO1973_GTA02 */
+
+@@ -519,9 +526,8 @@ static int gta01_pm_gps_resume(struct platform_device *pdev)
+ /* remove pulldown now it won't be floating any more */
+ s3c2410_gpio_pullup(S3C2410_GPH5, 0);
+
+- /* FIXME */
+- pcf50633_onoff_set(pcf50633_global,
+- PCF50633_REGULATOR_LDO5, 1);
++ if (neo1973_gps.power_was_on)
++ gps_pwron_set(1);
+ #endif /* CONFIG_MACH_NEO1973_GTA02 */
+ }
+ return 0;
+--
+1.5.6.5
+