openwrt-xburst/target/linux/s3c24xx/patches-2.6.24/1251-use-gta02-glamo-mci-sd-dynamic-clock.patch.patch

From d4b28ec4e2818207cc0e48b90dbce581e0b779e7 Mon Sep 17 00:00:00 2001
From: Andy Green <andy@openmoko.com>
Date: Wed, 30 Jul 2008 12:46:56 +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 <andy@openmoko.com>
---
 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 <linux/gta02_hdq.h>
 #include <linux/bq27000_battery.h>
 
+#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 */
-- 
1.5.6.5