On Tue, May 4, 2021 at 6:12 PM Ulf Hansson <ulf.hansson@xxxxxxxxxx> wrote: > Rather than only deselecting the SD card via a CMD7, before we cut power to > it at system suspend, at runtime suspend or at shutdown, let's add support > for a graceful power off sequence via enabling the SD Power Off > Notification feature. > > Note that, the Power Off Notification feature was added in the SD spec > v4.x, which is several years ago. However, it's still a bit unclear how > often the SD card vendors decides to implement support for it. To validate > these changes a Sandisk Extreme PRO A2 64GB has been used, which seems to > work nicely. > > Signed-off-by: Ulf Hansson <ulf.hansson@xxxxxxxxxx> Given how these things work in some quarters I would not be surprised if some SD card vendors tend to start to implement this when they see that Linux (Android) has started to support it. So let's encourage them: Reviewed-by: Linus Walleij <linus.walleij@xxxxxxxxxx> Yours, Linus Walleij
