diff options
Diffstat (limited to 'drivers/pci/pci.h')
| -rw-r--r-- | drivers/pci/pci.h | 17 |
1 files changed, 16 insertions, 1 deletions
diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h index 2f93ecec468b..c058f862ab08 100644 --- a/drivers/pci/pci.h +++ b/drivers/pci/pci.h @@ -13,10 +13,25 @@ #define PCIE_LINK_RETRAIN_TIMEOUT_MS 1000 -/* Power stable to PERST# inactive from PCIe card Electromechanical Spec */ +/* + * Power stable to PERST# inactive. + * + * See the "Power Sequencing and Reset Signal Timings" table of the PCI Express + * Card Electromechanical Specification, Revision 5.1, Section 2.9.2, Symbol + * "T_PVPERL". + */ #define PCIE_T_PVPERL_MS 100 /* + * REFCLK stable before PERST# inactive. + * + * See the "Power Sequencing and Reset Signal Timings" table of the PCI Express + * Card Electromechanical Specification, Revision 5.1, Section 2.9.2, Symbol + * "T_PERST-CLK". + */ +#define PCIE_T_PERST_CLK_US 100 + +/* * End of conventional reset (PERST# de-asserted) to first configuration * request (device able to respond with a "Request Retry Status" completion), * from PCIe r6.0, sec 6.6.1. |