mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
synced 2024-11-25 10:10:37 +02:00
81 lines
2.5 KiB
Diff
81 lines
2.5 KiB
Diff
|
From ca19d156400f817960efe0d14680324b2ea34171 Mon Sep 17 00:00:00 2001
|
||
|
|
From: Andy Green <andy@openmoko.com>
|
||
|
|
Date: Wed, 3 Sep 2008 19:39:47 +0800
|
||
|
|
Subject: [PATCH] fix-glamo-idleclock-around-suspend.patch
|
||
|
|
|
||
|
|
Possible implementation of SD Card corruption workaround reported here
|
||
|
|
|
||
|
|
https://docs.openmoko.org/trac/ticket/1802#comment:5
|
||
|
|
|
||
|
|
Signed-off-by: Andy Green <andy@openmoko.com>
|
||
|
|
---
|
||
|
|
drivers/mfd/glamo/glamo-mci.c | 31 ++++++++++++++++++++++++++++++-
|
||
|
|
1 files changed, 30 insertions(+), 1 deletions(-)
|
||
|
|
|
||
|
|
diff --git a/drivers/mfd/glamo/glamo-mci.c b/drivers/mfd/glamo/glamo-mci.c
|
||
|
|
index 577021e..3eece08 100644
|
||
|
|
--- a/drivers/mfd/glamo/glamo-mci.c
|
||
|
|
+++ b/drivers/mfd/glamo/glamo-mci.c
|
||
|
|
@@ -99,6 +99,8 @@ module_param(sd_drive, int, 0644);
|
||
|
|
static int sd_idleclk = 0; /* disallow idle clock by default */
|
||
|
|
module_param(sd_idleclk, int, 0644);
|
||
|
|
|
||
|
|
+/* used to stash real idleclk state in suspend: we force it to run in there */
|
||
|
|
+static int suspend_sd_idleclk;
|
||
|
|
|
||
|
|
|
||
|
|
unsigned char CRC7(u8 * pu8, int cnt)
|
||
|
|
@@ -947,6 +949,27 @@ static int glamo_mci_suspend(struct platform_device *dev, pm_message_t state)
|
||
|
|
struct glamo_mci_host *host = mmc_priv(mmc);
|
||
|
|
int ret;
|
||
|
|
|
||
|
|
+ /*
|
||
|
|
+ * possible workaround for SD corruption during suspend - resume
|
||
|
|
+ * make sure the clock was running during suspend and consequently
|
||
|
|
+ * resume
|
||
|
|
+ */
|
||
|
|
+ if (host->pdata->glamo_mci_use_slow)
|
||
|
|
+ if ((host->pdata->glamo_mci_use_slow)())
|
||
|
|
+ __glamo_mci_fix_card_div(host, host->clk_div *
|
||
|
|
+ sd_slow_ratio);
|
||
|
|
+ else
|
||
|
|
+ __glamo_mci_fix_card_div(host, host->clk_div);
|
||
|
|
+ else
|
||
|
|
+ __glamo_mci_fix_card_div(host, host->clk_div);
|
||
|
|
+
|
||
|
|
+ /* we are going to do more commands to override this in
|
||
|
|
+ * mmc_suspend_host(), so we need to change sd_idleclk for the
|
||
|
|
+ * duration as well
|
||
|
|
+ */
|
||
|
|
+ suspend_sd_idleclk = sd_idleclk;
|
||
|
|
+ sd_idleclk = 1;
|
||
|
|
+
|
||
|
|
host->suspending++;
|
||
|
|
if (host->pdata->mci_all_dependencies_resumed)
|
||
|
|
(host->pdata->mci_suspending)(dev);
|
||
|
|
@@ -963,6 +986,7 @@ int glamo_mci_resume(struct platform_device *dev)
|
||
|
|
{
|
||
|
|
struct mmc_host *mmc = platform_get_drvdata(dev);
|
||
|
|
struct glamo_mci_host *host = mmc_priv(mmc);
|
||
|
|
+ int ret;
|
||
|
|
|
||
|
|
if (host->pdata->mci_all_dependencies_resumed)
|
||
|
|
if (!(host->pdata->mci_all_dependencies_resumed)(dev))
|
||
|
|
@@ -970,7 +994,12 @@ int glamo_mci_resume(struct platform_device *dev)
|
||
|
|
|
||
|
|
host->suspending--;
|
||
|
|
|
||
|
|
- return mmc_resume_host(mmc);
|
||
|
|
+ ret = mmc_resume_host(mmc);
|
||
|
|
+
|
||
|
|
+ /* put sd_idleclk back to pre-suspend state */
|
||
|
|
+ sd_idleclk = suspend_sd_idleclk;
|
||
|
|
+
|
||
|
|
+ return ret;
|
||
|
|
}
|
||
|
|
EXPORT_SYMBOL_GPL(glamo_mci_resume);
|
||
|
|
|
||
|
|
--
|
||
|
|
1.5.6.5
|
||
|
|
|