• Michael Kelley's avatar
    clockevents/drivers/i8253: Add support for PIT shutdown quirk · 35b69a42
    Michael Kelley authored
    Add support for platforms where pit_shutdown() doesn't work because of a
    quirk in the PIT emulation. On these platforms setting the counter register
    to zero causes the PIT to start running again, negating the shutdown.
    
    Provide a global variable that controls whether the counter register is
    zero'ed, which platform specific code can override.
    Signed-off-by: default avatarMichael Kelley <mikelley@microsoft.com>
    Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
    Cc: "gregkh@linuxfoundation.org" <gregkh@linuxfoundation.org>
    Cc: "devel@linuxdriverproject.org" <devel@linuxdriverproject.org>
    Cc: "daniel.lezcano@linaro.org" <daniel.lezcano@linaro.org>
    Cc: "virtualization@lists.linux-foundation.org" <virtualization@lists.linux-foundation.org>
    Cc: "jgross@suse.com" <jgross@suse.com>
    Cc: "akataria@vmware.com" <akataria@vmware.com>
    Cc: "olaf@aepfle.de" <olaf@aepfle.de>
    Cc: "apw@canonical.com" <apw@canonical.com>
    Cc: vkuznets <vkuznets@redhat.com>
    Cc: "jasowang@redhat.com" <jasowang@redhat.com>
    Cc: "marcelo.cerri@canonical.com" <marcelo.cerri@canonical.com>
    Cc: KY Srinivasan <kys@microsoft.com>
    Cc: stable@vger.kernel.org
    Link: https://lkml.kernel.org/r/1541303219-11142-2-git-send-email-mikelley@microsoft.com
    35b69a42
i8253.h 809 Bytes