target/linux/s3c24xx/patches-2.6.26/1231-use-gta02-glamo-mci-sd-dynamic-clock.patch.patch

   1 From cba90f4bb9fc765be789e7d9e0f836ad4670c87f Mon Sep 17 00:00:00 2001
   2 From: Andy Green <andy@openmoko.com>
   3 Date: Wed, 30 Jul 2008 14:37:17 +0100
   4 Subject: [PATCH] use-gta02-glamo-mci-sd-dynamic-clock.patch
   5
   6 This patch uses the new glamo-mci slow clock ratio
   7 patch in order to dynamically reduce SD Card clock
   8 rate when the GPS unit is powered on GTA02.
   9
  10 Signed-off-by: Andy Green <andy@openmoko.com>
  11 ---
  12  arch/arm/mach-s3c2440/mach-gta02.c     |   12 ++++++++++++
  13  arch/arm/plat-s3c24xx/neo1973_pm_gps.c |   12 +++++++++---
  14  2 files changed, 21 insertions(+), 3 deletions(-)
  15
  16 diff --git a/arch/arm/mach-s3c2440/mach-gta02.c b/arch/arm/mach-s3c2440/mach-gta02.c
  17 index 382837d..8e43c4a 100644
  18 --- a/arch/arm/mach-s3c2440/mach-gta02.c
  19 +++ b/arch/arm/mach-s3c2440/mach-gta02.c
  20 @@ -85,6 +85,8 @@
  21  #include <linux/gta02_hdq.h>
  22  #include <linux/bq27000_battery.h>
  23
  24 +#include "../plat-s3c24xx/neo1973_pm_gps.h"
  25 +
  26  /* arbitrates which sensor IRQ owns the shared SPI bus */
  27  static spinlock_t motion_irq_lock;
  28
  29 @@ -1424,6 +1426,15 @@ static void gta02_glamo_mci_suspending(struct platform_device *dev)
  30
  31  /* Smedia Glamo 3362 */
  32
  33 +/*
  34 + * we crank down SD Card clock dynamically when GPS is powered
  35 + */
  36 +
  37 +static int gta02_glamo_mci_use_slow(void)
  38 +{
  39 +       return neo1973_pm_gps_is_on();
  40 +}
  41 +
  42  static struct glamofb_platform_data gta02_glamo_pdata = {
  43         .width          = 43,
  44         .height         = 58,
  45 @@ -1456,6 +1467,7 @@ static struct glamofb_platform_data gta02_glamo_pdata = {
  46
  47         /* glamo MMC function platform data */
  48         .glamo_set_mci_power = gta02_glamo_mmc_set_power,
  49 +       .glamo_mci_use_slow = gta02_glamo_mci_use_slow,
  50         .glamo_irq_is_wired = glamo_irq_is_wired,
  51         .mci_suspending = gta02_glamo_mci_suspending,
  52         .mci_all_dependencies_resumed =
  53 diff --git a/arch/arm/plat-s3c24xx/neo1973_pm_gps.c b/arch/arm/plat-s3c24xx/neo1973_pm_gps.c
  54 index 8cd583d..a21b763 100644
  55 --- a/arch/arm/plat-s3c24xx/neo1973_pm_gps.c
  56 +++ b/arch/arm/plat-s3c24xx/neo1973_pm_gps.c
  57 @@ -39,6 +39,12 @@ struct neo1973_pm_gps_data {
  58
  59  static struct neo1973_pm_gps_data neo1973_gps;
  60
  61 +int neo1973_pm_gps_is_on(void)
  62 +{
  63 +       return neo1973_gps.power_was_on;
  64 +}
  65 +EXPORT_SYMBOL_GPL(neo1973_pm_gps_is_on);
  66 +
  67  /* This is the 2.8V supply for the RTC crystal, the mail clock crystal and
  68   * the input to VDD_RF */
  69  static void gps_power_2v8_set(int on)
  70 @@ -265,6 +271,9 @@ static int gps_power_1v5_get(void)
  71  /* This is the POWERON pin */
  72  static void gps_pwron_set(int on)
  73  {
  74 +
  75 +       neo1973_gps.power_was_on = !!on;
  76 +
  77  #ifdef CONFIG_MACH_NEO1973_GTA01
  78         if (machine_is_neo1973_gta01())
  79                 neo1973_gpb_setpin(GTA01_GPIO_GPS_PWRON, on);
  80 @@ -492,9 +501,6 @@ static DEVICE_ATTR(power_sequence, 0644, power_sequence_read,
  81  static int gta01_pm_gps_suspend(struct platform_device *pdev,
  82                                 pm_message_t state)
  83  {
  84 -
  85 -       neo1973_gps.power_was_on = gps_pwron_get();
  86 -
  87  #ifdef CONFIG_MACH_NEO1973_GTA01
  88         if (machine_is_neo1973_gta01()) {
  89                 /* FIXME */
  90 --
  91 1.5.6.3
  92