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