diff options
Diffstat (limited to 'target/linux/s3c24xx/patches/0104-Enable-GPS-only-if-it-was-powered-on-before-suspendi.patch')
| -rwxr-xr-x | target/linux/s3c24xx/patches/0104-Enable-GPS-only-if-it-was-powered-on-before-suspendi.patch | 85 |
1 files changed, 85 insertions, 0 deletions
diff --git a/target/linux/s3c24xx/patches/0104-Enable-GPS-only-if-it-was-powered-on-before-suspendi.patch b/target/linux/s3c24xx/patches/0104-Enable-GPS-only-if-it-was-powered-on-before-suspendi.patch new file mode 100755 index 0000000000..b230c3bda1 --- /dev/null +++ b/target/linux/s3c24xx/patches/0104-Enable-GPS-only-if-it-was-powered-on-before-suspendi.patch @@ -0,0 +1,85 @@ +From f44eb50db93450c790f398379215431fa9959511 Mon Sep 17 00:00:00 2001 +From: Holger Freyther <zecke@openmoko.org> +Date: Fri, 25 Jul 2008 23:06:04 +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; +-- +1.5.6.3 + |