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From cba90f4bb9fc765be789e7d9e0f836ad4670c87f Mon Sep 17 00:00:00 2001
From: Andy Green <andy@openmoko.com>
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 <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 */
--
1.5.6.3
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