diff options
Diffstat (limited to 'target/linux/s3c24xx/patches-2.6.24/1285-fix-glamo-idleclock-around-suspend.patch.patch')
| -rw-r--r-- | target/linux/s3c24xx/patches-2.6.24/1285-fix-glamo-idleclock-around-suspend.patch.patch | 80 |
1 files changed, 80 insertions, 0 deletions
diff --git a/target/linux/s3c24xx/patches-2.6.24/1285-fix-glamo-idleclock-around-suspend.patch.patch b/target/linux/s3c24xx/patches-2.6.24/1285-fix-glamo-idleclock-around-suspend.patch.patch new file mode 100644 index 0000000000..0f1c0a0266 --- /dev/null +++ b/target/linux/s3c24xx/patches-2.6.24/1285-fix-glamo-idleclock-around-suspend.patch.patch @@ -0,0 +1,80 @@ +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 + |