Messages in this thread Patch in this message | | | From | Adam Lee <> | Subject | [PATCH] mmc: core: Add a capability for disabling mmc cards | Date | Tue, 14 May 2013 15:38:17 +0800 |
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On some systems we need a way to disable MMC card support in a MMC/SD card slot due to the legal concern.
Add support in the core SD/MMC code to support this.
Signed-off-by: Doug Anderson <dianders@chromium.org> Signed-off-by: Alim Akhtar <alim.akhtar@samsung.com> Signed-off-by: Adam Lee <adam.lee@canonical.com> --- drivers/mmc/core/core.c | 2 +- include/linux/mmc/host.h | 1 + 2 files changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c index c40396f..4788b88 100644 --- a/drivers/mmc/core/core.c +++ b/drivers/mmc/core/core.c @@ -2271,7 +2271,7 @@ static int mmc_rescan_try_freq(struct mmc_host *host, unsigned freq) return 0; if (!mmc_attach_sd(host)) return 0; - if (!mmc_attach_mmc(host)) + if (!(host->caps2 & MMC_CAP2_NO_MMC) && !mmc_attach_mmc(host)) return 0; mmc_power_off(host); diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h index e326ae2..ffe5c3d 100644 --- a/include/linux/mmc/host.h +++ b/include/linux/mmc/host.h @@ -281,6 +281,7 @@ struct mmc_host { #define MMC_CAP2_PACKED_CMD (MMC_CAP2_PACKED_RD | \ MMC_CAP2_PACKED_WR) #define MMC_CAP2_NO_PRESCAN_POWERUP (1 << 14) /* Don't power up before scan */ +#define MMC_CAP2_NO_MMC (1 << 15) /* Only SD supported, not MMC */ mmc_pm_flag_t pm_caps; /* supported pm features */ -- 1.7.10.4
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