From cba90f4bb9fc765be789e7d9e0f836ad4670c87f Mon Sep 17 00:00:00 2001 From: Andy Green Date: Wed, 30 Jul 2008 14:37:17 +0100 Subject: [PATCH] use-gta02-glamo-mci-sd-dynamic-clock.patch This patch uses the new glamo-mci slow clock ratio patch in order to dynamically reduce SD Card clock rate when the GPS unit is powered on GTA02. Signed-off-by: Andy Green --- arch/arm/mach-s3c2440/mach-gta02.c | 12 ++++++++++++ arch/arm/plat-s3c24xx/neo1973_pm_gps.c | 12 +++++++++--- 2 files changed, 21 insertions(+), 3 deletions(-) diff --git a/arch/arm/mach-s3c2440/mach-gta02.c b/arch/arm/mach-s3c2440/mach-gta02.c index 382837d..8e43c4a 100644 --- a/arch/arm/mach-s3c2440/mach-gta02.c +++ b/arch/arm/mach-s3c2440/mach-gta02.c @@ -85,6 +85,8 @@ #include #include +#include "../plat-s3c24xx/neo1973_pm_gps.h" + /* arbitrates which sensor IRQ owns the shared SPI bus */ static spinlock_t motion_irq_lock; @@ -1424,6 +1426,15 @@ static void gta02_glamo_mci_suspending(struct platform_device *dev) /* Smedia Glamo 3362 */ +/* + * we crank down SD Card clock dynamically when GPS is powered + */ + +static int gta02_glamo_mci_use_slow(void) +{ + return neo1973_pm_gps_is_on(); +} + static struct glamofb_platform_data gta02_glamo_pdata = { .width = 43, .height = 58, @@ -1456,6 +1467,7 @@ static struct glamofb_platform_data gta02_glamo_pdata = { /* glamo MMC function platform data */ .glamo_set_mci_power = gta02_glamo_mmc_set_power, + .glamo_mci_use_slow = gta02_glamo_mci_use_slow, .glamo_irq_is_wired = glamo_irq_is_wired, .mci_suspending = gta02_glamo_mci_suspending, .mci_all_dependencies_resumed = diff --git a/arch/arm/plat-s3c24xx/neo1973_pm_gps.c b/arch/arm/plat-s3c24xx/neo1973_pm_gps.c index 8cd583d..a21b763 100644 --- a/arch/arm/plat-s3c24xx/neo1973_pm_gps.c +++ b/arch/arm/plat-s3c24xx/neo1973_pm_gps.c @@ -39,6 +39,12 @@ struct neo1973_pm_gps_data { static struct neo1973_pm_gps_data neo1973_gps; +int neo1973_pm_gps_is_on(void) +{ + return neo1973_gps.power_was_on; +} +EXPORT_SYMBOL_GPL(neo1973_pm_gps_is_on); + /* 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) @@ -265,6 +271,9 @@ static int gps_power_1v5_get(void) /* This is the POWERON pin */ static void gps_pwron_set(int on) { + + neo1973_gps.power_was_on = !!on; + #ifdef CONFIG_MACH_NEO1973_GTA01 if (machine_is_neo1973_gta01()) neo1973_gpb_setpin(GTA01_GPIO_GPS_PWRON, on); @@ -492,9 +501,6 @@ 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 */ -- 1.5.6.3