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MMC: AU1xMMC: Allow platforms to disable host capabilities 

Although the hardware supports a 4/8bit SD interface and the driver
unconditionally advertises all hardware caps to the MMC core, not all
datalines may actually be wired up.  This patch introduces another
field to au1xmmc platform data allowing platforms to disable certain
advanced host controller features.

Signed-off-by: Manuel Lauss <manuel.lauss@gmail.com>
To: linux-mmc@vger.kernel.org
CC: Linux-MIPS <linux-mips@linux-mips.org>
Patchwork: http://patchwork.linux-mips.org/patch/460/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Manuel Lauss 2009-10-14 09:38:06 +02:00 committed by Ralf Baechle
parent 92bbe1b988
commit 3b839070f1
2 changed files with 5 additions and 0 deletions
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1
arch/mips/include/asm/mach-au1x00/au1100_mmc.h
View File

@ -46,6 +46,7 @@ struct au1xmmc_platform_data {
int(*card_readonly)(void *mmc_host);
void(*set_power)(void *mmc_host, int state);
struct led_classdev *led;
unsigned long mask_host_caps;
};
#define SD0_BASE 0xB0600000

4
drivers/mmc/host/au1xmmc.c
View File

@ -1017,6 +1017,10 @@ static int __devinit au1xmmc_probe(struct platform_device *pdev)
} else
mmc->caps |= MMC_CAP_NEEDS_POLL;
/* platform may not be able to use all advertised caps */
if (host->platdata)
mmc->caps &= ~(host->platdata->mask_host_caps);
tasklet_init(&host->data_task, au1xmmc_tasklet_data,
(unsigned long)host);