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authorPaul Walmsley <paul@pwsan.com>2011-10-06 14:50:35 -0600
committerChris Ball <cjb@laptop.org>2011-10-27 09:11:28 -0400
commit9b68256cdef75204aa8a4583aa79dd7c081796b3 (patch)
tree8b0d514421193b11ebfb98e99bde76b81bfb00f5 /drivers/mmc
parent2bf22b39823c1d173dda31111a4eb2ce36daaf39 (diff)
downloadop-kernel-dev-9b68256cdef75204aa8a4583aa79dd7c081796b3.zip
op-kernel-dev-9b68256cdef75204aa8a4583aa79dd7c081796b3.tar.gz
mmc: omap_hsmmc: if multiblock reads are broken, disable them
When device data indicates that multiple block reads are not supported on a given HSMMC controller instance, log a message to the console, and pass the appropriate MMC capability flag to the MMC core. Signed-off-by: Paul Walmsley <paul@pwsan.com> Cc: Dave Hylands <dhylands@gmail.com> Tested-by: Steve Sakoman <sakoman@gmail.com> Signed-off-by: Chris Ball <cjb@laptop.org>
Diffstat (limited to 'drivers/mmc')
-rw-r--r--drivers/mmc/host/omap_hsmmc.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/mmc/host/omap_hsmmc.c b/drivers/mmc/host/omap_hsmmc.c
index bb334be..e8ff123 100644
--- a/drivers/mmc/host/omap_hsmmc.c
+++ b/drivers/mmc/host/omap_hsmmc.c
@@ -1942,6 +1942,10 @@ static int __init omap_hsmmc_probe(struct platform_device *pdev)
omap_hsmmc_context_save(host);
mmc->caps |= MMC_CAP_DISABLE;
+ if (host->pdata->controller_flags & OMAP_HSMMC_BROKEN_MULTIBLOCK_READ) {
+ dev_info(&pdev->dev, "multiblock reads disabled due to 35xx erratum 2.1.1.128; MMC read performance may suffer\n");
+ mmc->caps2 |= MMC_CAP2_NO_MULTI_READ;
+ }
pm_runtime_enable(host->dev);
pm_runtime_get_sync(host->dev);
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