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authorDaniel Drake <dsd@laptop.org>2011-07-20 20:39:22 +0400
committerChris Ball <cjb@laptop.org>2011-10-26 23:43:35 +0400
commit08da834a24312157f512224691ad1fddd11c1073 (patch)
tree6ed587d6a7937c792085bf9fc9765ce1c6a63ed9 /Documentation
parent1e4cb22bb5094def8eb5c3893f9dda2d517d29bb (diff)
downloadlinux-08da834a24312157f512224691ad1fddd11c1073.tar.xz
mmc: enable runtime PM by default
Now that we have improved the runtime power management powerup/powerdown code, we believe that MMC_CAP_POWER_OFF_CARD is no longer necessary: runtime PM should now work everywhere. The only hard evidence for introducing MMC_CAP_POWER_OFF_CARD was the Marvell sd8686 wifi chip, which was believed to require external gpio manipulation which wasn't supported by some boards. After further investigation it was realized (and confirmed by Marvell folks) that sd8686 requirements can be fulfilled by changing the reset sequence itself, even if no external gpio is manipulated. For further information, see the following thread: http://www.mail-archive.com/linux-mmc@vger.kernel.org/msg04289.html Enable this trivially for a release or two. If no problems are reported, we will follow up with a more extensive patch to remove this flag altogether. If problems are reported, we can look at whitelist/blacklist possibilities as before. Signed-off-by: Daniel Drake <dsd@laptop.org> Acked-by: Ohad Ben-Cohen <ohad@wizery.com> Signed-off-by: Chris Ball <cjb@laptop.org>
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