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i3c: mipi-i3c-hci-pci: Add System Suspend support

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Assign the driver PM operations pointer, which is necessary for the PCI
subsystem to put the device into a low power state.  Refer to
pci_pm_suspend_noirq() which bails out if the pointer is NULL, before
it has the opportunity to call pci_prepare_to_sleep().

No other actions are necessary as the mipi-i3c-hci driver takes care of
controller state.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Reviewed-by: Frank Li <Frank.Li@nxp.com>
Link: https://patch.msgid.link/20260123063325.8210-4-adrian.hunter@intel.com
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
This commit is contained in:
Adrian Hunter 2026-01-23 08:33:25 +02:00 committed by Alexandre Belloni
parent c3357bdd9b
commit 4280197d15
1 changed files with 7 additions and 0 deletions
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7
drivers/i3c/master/mipi-i3c-hci/mipi-i3c-hci-pci.c
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@ -320,6 +320,10 @@ static void mipi_i3c_hci_pci_remove(struct pci_dev *pci)
mfd_remove_devices(&pci->dev);
}
/* PM ops must exist for PCI to put a device to a low power state */
static const struct dev_pm_ops mipi_i3c_hci_pci_pm_ops = {
};
static const struct pci_device_id mipi_i3c_hci_pci_devices[] = {
/* Wildcat Lake-U */
{ PCI_VDEVICE(INTEL, 0x4d7c), (kernel_ulong_t)&intel_mi_1_info},
@ -342,6 +346,9 @@ static struct pci_driver mipi_i3c_hci_pci_driver = {
.id_table = mipi_i3c_hci_pci_devices,
.probe = mipi_i3c_hci_pci_probe,
.remove = mipi_i3c_hci_pci_remove,
.driver = {
.pm = pm_ptr(&mipi_i3c_hci_pci_pm_ops)
},
};
module_pci_driver(mipi_i3c_hci_pci_driver);