diff options
| author | Max Krummenacher <max.krummenacher@toradex.com> | 2014-06-23 17:26:31 +0200 |
|---|---|---|
| committer | Max Krummenacher <max.krummenacher@toradex.com> | 2014-06-23 17:26:31 +0200 |
| commit | 173dae0b389c8a291ddd3b03cab308280b74ef34 (patch) | |
| tree | f95a9dc322cab92d798d0a7cf636da82a96bae56 | |
| parent | b5d9cf67a9593c07ab9d74f1d5cf83a497d577a4 (diff) | |
pci-imx6.c: add config option to force GEN1 speed
| -rw-r--r-- | drivers/pci/host/Kconfig | 3 | ||||
| -rw-r--r-- | drivers/pci/host/pci-imx6.c | 5 |
2 files changed, 7 insertions, 1 deletions
diff --git a/drivers/pci/host/Kconfig b/drivers/pci/host/Kconfig index 120714876e83..9d782b2c824d 100644 --- a/drivers/pci/host/Kconfig +++ b/drivers/pci/host/Kconfig @@ -20,6 +20,9 @@ config PCI_IMX6 select PCIEPORTBUS select PCIE_DW +config PCI_FORCE_GEN1 + bool "Force GEN1 speed on the PCIe controller (e.g. don't allow GEN2)" + config EP_MODE_IN_EP_RC_SYS bool "PCI Express EP mode in the IMX6 RC/EP interconnection system" depends on PCI_IMX6 diff --git a/drivers/pci/host/pci-imx6.c b/drivers/pci/host/pci-imx6.c index b434d6228430..f201d8905100 100644 --- a/drivers/pci/host/pci-imx6.c +++ b/drivers/pci/host/pci-imx6.c @@ -381,7 +381,7 @@ static int imx6_pcie_start_link(struct pcie_port *pp) ret = imx6_pcie_wait_for_link(pp); if (ret) return ret; - +#ifndef CONFIG_PCI_FORCE_GEN1 /* Allow Gen2 mode after the link is up. */ tmp = readl(pp->dbi_base + PCIE_RC_LCR); tmp &= ~PCIE_RC_LCR_MAX_LINK_SPEEDS_MASK; @@ -411,6 +411,9 @@ static int imx6_pcie_start_link(struct pcie_port *pp) /* Make sure link training is finished as well! */ ret = imx6_pcie_wait_for_link(pp); +#else + dev_info(pp->dev, "Configuration forces GEN1\n"); +#endif /* CONFIG_PCI_FORCE_GEN1 */ if (ret) { dev_err(pp->dev, "Failed to bring link up!\n"); |