Skip to content

FROMGIT: power: sequencing: pwrseq-pcie-m2: Support PCIe switch topologies #1079

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Open
weiden (WeiDeng-weiden) wants to merge 1 commit into
base: qcom-6.18.y
Choose a base branch
from
Open

FROMGIT: power: sequencing: pwrseq-pcie-m2: Support PCIe switch topologies #1079

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
19 changes: 17 additions & 2 deletions drivers/power/sequencing/pwrseq-pcie-m2.c
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -373,6 +373,21 @@ static void pwrseq_pcie_m2_remove_serdev(struct pwrseq_pcie_m2_ctx *ctx,
mutex_unlock(&ctx->list_lock);
}

static bool pwrseq_pcie_m2_pci_parent_matches(struct pci_dev *pdev,
struct device_node *pci_parent)
{
struct device *dev = pdev->dev.parent;

while (dev) {
if (dev->of_node == pci_parent)
return true;
if (!dev_is_pci(dev))
break;
dev = dev->parent;
}
return false;
}

static int pwrseq_pcie_m2_notify(struct notifier_block *nb, unsigned long action,
void *data)
{
Expand All @@ -387,7 +402,7 @@ static int pwrseq_pcie_m2_notify(struct notifier_block *nb, unsigned long action
*/
struct device_node *pci_parent __free(device_node) =
of_graph_get_remote_node(dev_of_node(ctx->dev), 0, 0);
if (!pci_parent || (pci_parent != pdev->dev.parent->of_node))
if (!pci_parent || !pwrseq_pcie_m2_pci_parent_matches(pdev, pci_parent))
return NOTIFY_DONE;

switch (action) {
Expand Down Expand Up @@ -473,7 +488,7 @@ static int pwrseq_pcie_m2_create_serdev(struct pwrseq_pcie_m2_ctx *ctx)

/* Create serdev for existing PCI devices if required */
for_each_pci_dev(pdev) {
if (!pdev->dev.parent || pci_parent != pdev->dev.parent->of_node)
if (!pwrseq_pcie_m2_pci_parent_matches(pdev, pci_parent))
continue;

if (pci_match_id(pwrseq_m2_pci_ids, pdev)) {
Expand Down
Loading