From: Manuel Lauss Date: Wed, 14 Oct 2009 07:38:06 +0000 (+0200) Subject: MMC: AU1xMMC: Allow platforms to disable host capabilities X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=3b839070f11295735ce8d9ef580c5eb23417aabf;p=GitHub%2Fexynos8895%2Fandroid_kernel_samsung_universal8895.git 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 To: linux-mmc@vger.kernel.org CC: Linux-MIPS Patchwork: http://patchwork.linux-mips.org/patch/460/ Signed-off-by: Ralf Baechle --- diff --git a/arch/mips/include/asm/mach-au1x00/au1100_mmc.h b/arch/mips/include/asm/mach-au1x00/au1100_mmc.h index 58fbe173ecde..94000a3b6f0b 100644 --- a/arch/mips/include/asm/mach-au1x00/au1100_mmc.h +++ b/arch/mips/include/asm/mach-au1x00/au1100_mmc.h @@ -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 diff --git a/drivers/mmc/host/au1xmmc.c b/drivers/mmc/host/au1xmmc.c index c8649dfb2d0c..57b21198828f 100644 --- a/drivers/mmc/host/au1xmmc.c +++ b/drivers/mmc/host/au1xmmc.c @@ -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);