On 18 May 2017 at 01:58, <patrice.chot...@st.com> wrote: > From: Patrice Chotard <patrice.chot...@st.com> > > This deassert counter allow to manage "shared" reset lines > encountered in some specific case. On STiH410 SoC, DWC3, > EHCI and OHCI are all using a respective PHY, but all of > these PHYs shared a "global" reset. > > Currently, during command "usb stop", all host controller are > stopped (XHCI, EHCI and OHCI). XHCI is first shutdowned, which > means that PHY global reset is asserted. Then EHCI is shutdowned, > but its PHY reset has already been asserted which make handshake() > call failed in ehci_shutdown(). > > This counter allows to really assert a reset lines only when the > "last" user is asserting it. > > Signed-off-by: Patrice Chotard <patrice.chot...@st.com> > --- > drivers/reset/sti-reset.c | 41 ++++++++++++++++++++++++++++++----------- > 1 file changed, 30 insertions(+), 11 deletions(-) >
Reviewed-by: Simon Glass <s...@chromium.org> _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de https://lists.denx.de/listinfo/u-boot
