i3c: mipi-i3c-hci-pci: Add Runtime PM support

Enable Runtime PM for the mipi_i3c_hci_pci driver. Introduce helpers to
allow and forbid Runtime PM during probe and remove, using pm_runtime APIs.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Reviewed-by: Frank Li <Frank.Li@nxp.com>
Link: https://patch.msgid.link/20260113072702.16268-22-adrian.hunter@intel.com
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

diff --git a/drivers/i3c/master/mipi-i3c-hci/mipi-i3c-hci-pci.c b/drivers/i3c/master/mipi-i3c-hci/mipi-i3c-hci-pci.c
index 458f871a2e61205d9cf8a61057ade557d5db359b..1b38771667e5a3198a9f5929b1e0154efbef4d6d 100644 (file)
--- a/drivers/i3c/master/mipi-i3c-hci/mipi-i3c-hci-pci.c
+++ b/drivers/i3c/master/mipi-i3c-hci/mipi-i3c-hci-pci.c
@@ -18,6 +18,7 @@
 #include <linux/platform_data/mipi-i3c-hci.h>
 #include <linux/platform_device.h>
 #include <linux/pm_qos.h>
+#include <linux/pm_runtime.h>
 
 /*
  * There can up to 15 instances, but implementations have at most 2 at this
@@ -208,6 +209,18 @@ static const struct mipi_i3c_hci_pci_info intel_si_2_info = {
        .instance_count = 1,
 };
 
+static void mipi_i3c_hci_pci_rpm_allow(struct device *dev)
+{
+       pm_runtime_put(dev);
+       pm_runtime_allow(dev);
+}
+
+static void mipi_i3c_hci_pci_rpm_forbid(struct device *dev)
+{
+       pm_runtime_forbid(dev);
+       pm_runtime_get_sync(dev);
+}
+
 struct mipi_i3c_hci_pci_cell_data {
        struct mipi_i3c_hci_platform_data pdata;
        struct resource res;
@@ -285,6 +298,8 @@ static int mipi_i3c_hci_pci_probe(struct pci_dev *pci,
 
        pci_set_drvdata(pci, hci);
 
+       mipi_i3c_hci_pci_rpm_allow(&pci->dev);
+
        return 0;
 
 err_exit:
@@ -300,6 +315,8 @@ static void mipi_i3c_hci_pci_remove(struct pci_dev *pci)
        if (hci->info->exit)
                hci->info->exit(hci);
 
+       mipi_i3c_hci_pci_rpm_forbid(&pci->dev);
+
        mfd_remove_devices(&pci->dev);
 }