[PATCH v1 0/3]mmc: set a suitable max discard sectors value for host controller

[PATCH v1 0/3]mmc: set a suitable max discard sectors value for host controller

[Chuanxiao.Dong]

Hi Chris,
   These 3 patches set a suitable max_discard_sectors value for mmc
   queue which will be used for ERASE/TRIM. Add Adrian in Cc loop since
   he implemented the ERASE/TRIM feature for MMC driver.

   patch1: calculated a suitable timeout time for SDHCI host controller.
   Each erase cmd should be finished within the timeout time.

   patch2: calculated a suitable max_discard_sectors value for mmc
   queue. Since some SDHCI host controller cannot process the whole
   sectors at one time. In this patch, a new callback get_tmclk in
   mmc_host_ops was added to help core layer to calculate the max value.
   If this callback was implemented, core layer will calculted a suitable
   value. If not, the max_discard_sectors value will be the same as
   before.

   patch3: implemented get_tmclk callback for SDHCI host controller.

   Adrian, hope I can get your comment about these patches as well.
   Thanks for your time to review these patches.

Regards
Chuanxiao