diff options
| author | Yue Ma <yuem@codeaurora.org> | 2017-04-05 12:30:33 -0700 |
|---|---|---|
| committer | Gerrit - the friendly Code Review server <code-review@localhost> | 2017-07-11 14:37:24 -0700 |
| commit | aace9713d64765fdc7a8eb00ee2e5ea8e76d3685 (patch) | |
| tree | 2ddf61f415c5e153de8481ff80da9f04cd73c9e1 /drivers | |
| parent | e5a68ffaa375a3503ac31de90a8a2c09d5526740 (diff) | |
cnss2: Set PCIe to D3hot state before suspending PCIe link
As per PCIe spec, PCIe link needs to be set to D3hot state before
entering D3cold state.
Change-Id: I68defc4cf29fe88262e92fe8fb934948ad13aef4
CRs-fixed: 2059087
Signed-off-by: Yue Ma <yuem@codeaurora.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/net/wireless/cnss2/pci.c | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/drivers/net/wireless/cnss2/pci.c b/drivers/net/wireless/cnss2/pci.c index f914f4352392..a17b72ce03ba 100644 --- a/drivers/net/wireless/cnss2/pci.c +++ b/drivers/net/wireless/cnss2/pci.c @@ -143,6 +143,12 @@ int cnss_suspend_pci_link(struct cnss_pci_data *pci_priv) if (ret) goto out; + pci_disable_device(pci_priv->pci_dev); + + ret = pci_set_power_state(pci_priv->pci_dev, PCI_D3hot); + if (ret) + cnss_pr_err("Failed to set D3Hot, err = %d\n", ret); + ret = cnss_set_pci_link(pci_priv, PCI_LINK_DOWN); if (ret) goto out; @@ -172,10 +178,18 @@ int cnss_resume_pci_link(struct cnss_pci_data *pci_priv) pci_priv->pci_link_state = PCI_LINK_UP; + ret = pci_enable_device(pci_priv->pci_dev); + if (ret) { + cnss_pr_err("Failed to enable PCI device, err = %d\n", ret); + goto out; + } + ret = cnss_set_pci_config_space(pci_priv, RESTORE_PCI_CONFIG_SPACE); if (ret) goto out; + pci_set_master(pci_priv->pci_dev); + if (pci_priv->pci_link_down_ind) pci_priv->pci_link_down_ind = false; @@ -381,6 +395,12 @@ static int cnss_pci_suspend(struct device *dev) cnss_set_pci_config_space(pci_priv, SAVE_PCI_CONFIG_SPACE); + pci_disable_device(pci_dev); + + ret = pci_set_power_state(pci_dev, PCI_D3hot); + if (ret) + cnss_pr_err("Failed to set D3Hot, err = %d\n", + ret); } } @@ -407,10 +427,18 @@ static int cnss_pci_resume(struct device *dev) driver_ops = plat_priv->driver_ops; if (driver_ops && driver_ops->resume && !pci_priv->pci_link_down_ind) { + ret = pci_enable_device(pci_dev); + if (ret) + cnss_pr_err("Failed to enable PCI device, err = %d\n", + ret); + if (pci_priv->saved_state) cnss_set_pci_config_space(pci_priv, RESTORE_PCI_CONFIG_SPACE); + + pci_set_master(pci_dev); cnss_pci_set_mhi_state(pci_priv, CNSS_MHI_RESUME); + ret = driver_ops->resume(pci_dev); } |