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SubjectRe: [PATCH 1/3] mmc: core: Allow hosts to specify non-support for MMC commands
On 1 July 2016 at 09:45, Shawn Lin <shawn.lin@rock-chips.com> 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

>
> ---
>
> 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
>
>

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