On Tue, Jul 28, 2015 at 07:09:08PM +0530, Kishon Vijay Abraham I wrote: > This series fixes PCIe card enumeration issue in am57xx-evm. > > In the case of am57xx-evm, the PERST# line is connected to a gpio line > and this has to be driven low in order to perform a fundamental reset > of the card. If the gpio line is driven high, there is no way the card > can come out of reset. > > Add support in the pcie-dra7xx driver to make gpio drive PERST# line. > > The PERST# line can be used to perform reset not during the power on > sequence too (warm reset) but we are not adding support for this as the > PCIe express base sepcification doesn't explain how to perform warm > reset > > "In some cases, it may be possible for the Fundamental Reset mechanism > to be triggered by hardware without the removal and re-application of > power to the component. This is called a warm reset. This document does > not specify a means for generating a warm reset." > > Kishon Vijay Abraham I (2): > pci: host: pci-dra7xx: Add support to make gpio drive PERST# line > ARM: dts: am57xx-evm: Add 'gpios' property with gpio2_8 > > Documentation/devicetree/bindings/pci/ti-pci.txt | 3 +++ > arch/arm/boot/dts/am57xx-beagle-x15.dts | 5 +++++ > arch/arm/boot/dts/dra7.dtsi | 2 +- > drivers/pci/host/pci-dra7xx.c | 24 ++++++++++++++++++++-- > 4 files changed, 31 insertions(+), 3 deletions(-) Applied with Tony's ack (for patch 2) to pci/host-dra7xx for v4.3, thanks! -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
