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authorUlf Hansson <ulf.hansson@linaro.org>2015-10-02 11:56:11 +0300
committerUlf Hansson <ulf.hansson@linaro.org>2015-10-26 18:00:09 +0300
commit9eadcc0581a8ccaf4c2378aa1c193fb164304f1d (patch)
tree906aca52e94a37059310f6ed0ad9db58de74b2be /Documentation/mmc
parenta22950c888e3770c958a5c489906b48d3764a783 (diff)
downloadlinux-9eadcc0581a8ccaf4c2378aa1c193fb164304f1d.tar.xz
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.txt10
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