diff options
Diffstat (limited to 'drivers/mmc/host/sdhci-pci-gli.c')
| -rw-r--r-- | drivers/mmc/host/sdhci-pci-gli.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/mmc/host/sdhci-pci-gli.c b/drivers/mmc/host/sdhci-pci-gli.c index d09728c37d03..1499a64ec3aa 100644 --- a/drivers/mmc/host/sdhci-pci-gli.c +++ b/drivers/mmc/host/sdhci-pci-gli.c @@ -142,6 +142,9 @@ #define PCI_GLI_9755_MISC 0x78 #define PCI_GLI_9755_MISC_SSC_OFF BIT(26) +#define PCI_GLI_9755_PM_CTRL 0xFC +#define PCI_GLI_9755_PM_STATE GENMASK(1, 0) + #define GLI_MAX_TUNING_LOOP 40 /* Genesys Logic chipset */ @@ -676,6 +679,13 @@ static void gl9755_hw_setting(struct sdhci_pci_slot *slot) GLI_9755_CFG2_L1DLY_VALUE); pci_write_config_dword(pdev, PCI_GLI_9755_CFG2, value); + /* toggle PM state to allow GL9755 to enter ASPM L1.2 */ + pci_read_config_dword(pdev, PCI_GLI_9755_PM_CTRL, &value); + value |= PCI_GLI_9755_PM_STATE; + pci_write_config_dword(pdev, PCI_GLI_9755_PM_CTRL, value); + value &= ~PCI_GLI_9755_PM_STATE; + pci_write_config_dword(pdev, PCI_GLI_9755_PM_CTRL, value); + gl9755_wt_off(pdev); } |