On Wed, Aug 22, 2018 at 09:13:02PM +0900, Kunihiko Hayashi wrote: > Add support to get and control a list of resets for the device > as optional and shared. These resets must be kept de-asserted until > the device is enabled. > > This is specified as shared because some SoCs like UniPhier series > have common reset controls with all ahci controller instances. > > However, according to Thierry's view, > https://www.spinics.net/lists/linux-ide/msg55357.html > some hardware-specific drivers already use their own resets, > and the common reset make a path to occur double controls of resets. > > The ahci_platform_get_resources() can get and control the reset > only when the second argument includes AHCI_PLATFORM_GET_RESETS bit. > > Suggested-by: Hans de Goede <hdegoede@xxxxxxxxxx> > Cc: Thierry Reding <thierry.reding@xxxxxxxxx> > Signed-off-by: Kunihiko Hayashi <hayashi.kunihiko@xxxxxxxxxxxxx> > --- > .../devicetree/bindings/ata/ahci-platform.txt | 1 + Acked-by: Rob Herring <robh@xxxxxxxxxx> > drivers/ata/ahci.h | 1 + > drivers/ata/libahci_platform.c | 31 ++++++++++++++++++---- > include/linux/ahci_platform.h | 2 ++ > 4 files changed, 30 insertions(+), 5 deletions(-)
