diff options
| author | Adrian Hunter <adrian.hunter@intel.com> | 2015-05-07 13:10:20 +0300 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2015-06-01 09:06:57 +0200 |
| commit | 6376f69d20a6905c1d83be451065f70200490b98 (patch) | |
| tree | 4142c2b1b4631a4811c8d0a37d205b25655fce5c /drivers/mmc/core/host.c | |
| parent | ed16f58dc00d47439c201ab18ca4d981210bcafd (diff) | |
mmc: core: Add support for HS400 re-tuning
HS400 re-tuning must be done in HS200 mode. Add
the ability to switch from HS400 mode to HS200
mode before re-tuning and switch back to HS400
after re-tuning.
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'drivers/mmc/core/host.c')
| -rw-r--r-- | drivers/mmc/core/host.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/drivers/mmc/core/host.c b/drivers/mmc/core/host.c index e90e02fc596a..86c495b7a335 100644 --- a/drivers/mmc/core/host.c +++ b/drivers/mmc/core/host.c @@ -340,6 +340,7 @@ void mmc_retune_release(struct mmc_host *host) int mmc_retune(struct mmc_host *host) { + bool return_to_hs400 = false; int err; if (host->retune_now) @@ -354,8 +355,24 @@ int mmc_retune(struct mmc_host *host) host->doing_retune = 1; + if (host->ios.timing == MMC_TIMING_MMC_HS400) { + err = mmc_hs400_to_hs200(host->card); + if (err) + goto out; + + return_to_hs400 = true; + + if (host->ops->prepare_hs400_tuning) + host->ops->prepare_hs400_tuning(host, &host->ios); + } + err = mmc_execute_tuning(host->card); + if (err) + goto out; + if (return_to_hs400) + err = mmc_hs200_to_hs400(host->card); +out: host->doing_retune = 0; return err; |