Re: [PATCH 1/3] mmc: core: Allow hosts to specify non-support for MMC commands
From: Ulf Hansson <hidden>
Date: 2016-07-06 16:22:07
Also in:
linux-mmc, lkml
On 1 July 2016 at 09:45, Shawn Lin [off-list ref] wrote:
Host drivers which needs to valdiate for non-supported MMC commands and returnn error code for such requests. To improve and simplify the behaviour, let's invent MMC_CAP2_NO_MMC which these host drivers can set to tell the mmc core to skip sending MMC commands during card initialization. Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
Thanks, applied for next! Delaying patch2 and patch3 until I received acks from DT maintainers. Kind regards Uffe
quoted hunk ↗ jump to hunk
--- drivers/mmc/core/core.c | 5 +++-- include/linux/mmc/host.h | 1 + 2 files changed, 4 insertions(+), 2 deletions(-)diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c index 4c823df..94cbf4e 100644 --- a/drivers/mmc/core/core.c +++ b/drivers/mmc/core/core.c@@ -2510,8 +2510,9 @@ static int mmc_rescan_try_freq(struct mmc_host *host, unsigned freq) if (!mmc_attach_sd(host)) return 0; - if (!mmc_attach_mmc(host)) - return 0; + if (!(host->caps2 & MMC_CAP2_NO_MMC)) + if (!mmc_attach_mmc(host)) + return 0; mmc_power_off(host); return -EIO;diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h index c22476d..aa4bfbf 100644 --- a/include/linux/mmc/host.h +++ b/include/linux/mmc/host.h@@ -310,6 +310,7 @@ struct mmc_host { #define MMC_CAP2_NO_SDIO (1 << 19) /* Do not send SDIO commands during initialization */ #define MMC_CAP2_HS400_ES (1 << 20) /* Host supports enhanced strobe */ #define MMC_CAP2_NO_SD (1 << 21) /* Do not send SD commands during initialization */ +#define MMC_CAP2_NO_MMC (1 << 22) /* Do not send (e)MMC commands during initialization */ mmc_pm_flag_t pm_caps; /* supported pm features */ --2.3.7