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| author | Ulf Hansson <ulf.hansson@linaro.org> | 2015-10-02 10:56:11 +0200 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2015-10-26 16:00:09 +0100 |
| commit | 9eadcc0581a8ccaf4c2378aa1c193fb164304f1d (patch) | |
| tree | 906aca52e94a37059310f6ed0ad9db58de74b2be /Documentation/mmc | |
| parent | mmc: sdhci-of-esdhc: add quirk SDHCI_QUIRK_BROKEN_TIMEOUT_VAL for ls1021a (diff) | |
| download | linux-9eadcc0581a8ccaf4c2378aa1c193fb164304f1d.tar.xz linux-9eadcc0581a8ccaf4c2378aa1c193fb164304f1d.zip | |
mmc: core: Remove MMC_CLKGATE
MMC_CLKGATE was once invented to save power by gating the bus clock at
request inactivity. At that time it served its purpose. The modern way to
deal with power saving for these scenarios, is by using runtime PM.
Nowadays, several host drivers have deployed runtime PM, but for those
that haven't and which still cares power saving at request inactivity,
it's certainly time to deploy runtime PM as it has been around for several
years now.
To simplify code to mmc core and thus decrease maintenance efforts, this
patch removes all code related to MMC_CLKGATE.
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'Documentation/mmc')
| -rw-r--r-- | Documentation/mmc/mmc-dev-attrs.txt | 10 |
1 files changed, 0 insertions, 10 deletions
diff --git a/Documentation/mmc/mmc-dev-attrs.txt b/Documentation/mmc/mmc-dev-attrs.txt index 189bab09255a..caa555706f89 100644 --- a/Documentation/mmc/mmc-dev-attrs.txt +++ b/Documentation/mmc/mmc-dev-attrs.txt @@ -72,13 +72,3 @@ Note on raw_rpmb_size_mult: "raw_rpmb_size_mult" is a mutliple of 128kB block. RPMB size in byte is calculated by using the following equation: RPMB partition size = 128kB x raw_rpmb_size_mult - -SD/MMC/SDIO Clock Gating Attribute -================================== - -Read and write access is provided to following attribute. -This attribute appears only if CONFIG_MMC_CLKGATE is enabled. - - clkgate_delay Tune the clock gating delay with desired value in milliseconds. - -echo <desired delay> > /sys/class/mmc_host/mmcX/clkgate_delay |