xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

sdhci: Add quirk for forcing maximum block size to 2048 bytes

Browse Source 
FSL eSDHC controllers can support maximum block size up to 4096 bytes,
the MBL (Maximum Block Length) field in the capabilities register
extended by one bit, and is set to 0x3.

But the SDHCI core doesn't support blocks of 4096 bytes, and thus
forces blksz to the lowest value -- 512 bytes. With this patch we can
pin up the blksz to the maximum supported block size, i.e. 2048 bytes.

Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
This commit is contained in:
Anton Vorontsov
2009-03-17 00:14:03 +03:00
committed by Pierre Ossman
parent 063a9dbbce
commit 0633f65424
2 changed files with 15 additions and 7 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/mmc/host/sdhci.h
View File

@@ -224,6 +224,8 @@ struct sdhci_host {
#define SDHCI_QUIRK_PIO_NEEDS_DELAY (1<<18)
/* Controller losing signal/interrupt enable states after reset */
#define SDHCI_QUIRK_RESTORE_IRQS_AFTER_RESET (1<<19)
/* Controller has to be forced to use block size of 2048 bytes */
#define SDHCI_QUIRK_FORCE_BLK_SZ_2048 (1<<20)
int irq; /* Device IRQ */
void __iomem * ioaddr; /* Mapped address */