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| author |   Adrian Hunter <adrian.hunter@intel.com> | 2017-03-13 14:36:37 +0200 |
|---|---|---|
| committer |   Ulf Hansson <ulf.hansson@linaro.org> | 2017-04-24 21:42:02 +0200 |
| commit | b658af718465cd1e8011c8da281befdfc2debefd (patch) | |
| tree | 4c623d3459e8a74c1fd1c23dbf4c0780459ea6b7 /drivers/mmc/core/mmc_ops.c | |
| parent | mmc: queue: Share mmc request array between partitions (diff) | |
| download | linux-dev-b658af718465cd1e8011c8da281befdfc2debefd.tar.xz linux-dev-b658af718465cd1e8011c8da281befdfc2debefd.zip | |
mmc: mmc: Add functions to enable / disable the Command Queue
Add helper functions to enable or disable the Command Queue.
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'drivers/mmc/core/mmc_ops.c')
| -rw-r--r-- | drivers/mmc/core/mmc_ops.c | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/drivers/mmc/core/mmc_ops.c b/drivers/mmc/core/mmc_ops.c index fe80f26d6971..24c58d24c19a 100644 --- a/drivers/mmc/core/mmc_ops.c +++ b/drivers/mmc/core/mmc_ops.c @@ -838,3 +838,31 @@ int mmc_can_ext_csd(struct mmc_card *card) { return (card && card->csd.mmca_vsn > CSD_SPEC_VER_3); } + +static int mmc_cmdq_switch(struct mmc_card *card, bool enable) +{ + u8 val = enable ? EXT_CSD_CMDQ_MODE_ENABLED : 0; + int err; + + if (!card->ext_csd.cmdq_support) + return -EOPNOTSUPP; + + err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_CMDQ_MODE_EN, + val, card->ext_csd.generic_cmd6_time); + if (!err) + card->ext_csd.cmdq_en = enable; + + return err; +} + +int mmc_cmdq_enable(struct mmc_card *card) +{ + return mmc_cmdq_switch(card, true); +} +EXPORT_SYMBOL_GPL(mmc_cmdq_enable); + +int mmc_cmdq_disable(struct mmc_card *card) +{ + return mmc_cmdq_switch(card, false); +} +EXPORT_SYMBOL_GPL(mmc_cmdq_disable); |