spi: dw-pci: Add runtime power management support

Implement pm_runtime hooks at pci driver.

Signed-off-by: Raymond Tan <raymond.tan@intel.com>
[jarkko.nikula@linux.intel.com: Forward ported on top of
commit 1e6959832510 ("spi: dw: Add basic runtime PM support")]
Signed-off-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
Link: https://lore.kernel.org/r/20191018132131.31608-2-jarkko.nikula@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/drivers/spi/spi-dw-pci.c b/drivers/spi/spi-dw-pci.c
index 7ab53f4d04b9d368fb78bfdbe4f6e54040449ceb..1cddecea2715511f4a2b7a2b5201a2a14f65843b 100644 (file)
--- a/drivers/spi/spi-dw-pci.c
+++ b/drivers/spi/spi-dw-pci.c
@@ -7,6 +7,7 @@
 
 #include <linux/interrupt.h>
 #include <linux/pci.h>
+#include <linux/pm_runtime.h>
 #include <linux/slab.h>
 #include <linux/spi/spi.h>
 #include <linux/module.h>
@@ -101,6 +102,11 @@ static int spi_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
        dev_info(&pdev->dev, "found PCI SPI controller(ID: %04x:%04x)\n",
                pdev->vendor, pdev->device);
 
+       pm_runtime_set_autosuspend_delay(&pdev->dev, 1000);
+       pm_runtime_use_autosuspend(&pdev->dev);
+       pm_runtime_put_autosuspend(&pdev->dev);
+       pm_runtime_allow(&pdev->dev);
+
        return 0;
 }
 
@@ -108,6 +114,9 @@ static void spi_pci_remove(struct pci_dev *pdev)
 {
        struct dw_spi *dws = pci_get_drvdata(pdev);
 
+       pm_runtime_forbid(&pdev->dev);
+       pm_runtime_get_noresume(&pdev->dev);
+
        dw_spi_remove_host(dws);
        pci_free_irq_vectors(pdev);
 }