From 4b88b9ce722f19f8743de531cb3c510f36c6f970 Mon Sep 17 00:00:00 2001 From: Vaibhav Gupta Date: Thu, 25 Jun 2020 17:40:43 +0530 Subject: [PATCH] ptp_pch: use generic power management With legacy PM, drivers themselves were responsible for managing the device's power states and takes care of register states. After upgrading to the generic structure, PCI core will take care of required tasks and drivers should do only device-specific operations. In the case of ptp_pch, after removing PCI helper functions, .suspend() and .resume() became empty-body functions. Hence, define them NULL and use dev_pm_ops. Compile-tested only. Signed-off-by: Vaibhav Gupta Signed-off-by: David S. Miller --- drivers/ptp/ptp_pch.c | 37 +++---------------------------------- 1 file changed, 3 insertions(+), 34 deletions(-) diff --git a/drivers/ptp/ptp_pch.c b/drivers/ptp/ptp_pch.c index dcd6e00c8046..ce10ecd41ba0 100644 --- a/drivers/ptp/ptp_pch.c +++ b/drivers/ptp/ptp_pch.c @@ -508,40 +508,8 @@ static const struct ptp_clock_info ptp_pch_caps = { .enable = ptp_pch_enable, }; - -#ifdef CONFIG_PM -static s32 pch_suspend(struct pci_dev *pdev, pm_message_t state) -{ - pci_disable_device(pdev); - pci_enable_wake(pdev, PCI_D3hot, 0); - - if (pci_save_state(pdev) != 0) { - dev_err(&pdev->dev, "could not save PCI config state\n"); - return -ENOMEM; - } - pci_set_power_state(pdev, pci_choose_state(pdev, state)); - - return 0; -} - -static s32 pch_resume(struct pci_dev *pdev) -{ - s32 ret; - - pci_set_power_state(pdev, PCI_D0); - pci_restore_state(pdev); - ret = pci_enable_device(pdev); - if (ret) { - dev_err(&pdev->dev, "pci_enable_device failed\n"); - return ret; - } - pci_enable_wake(pdev, PCI_D3hot, 0); - return 0; -} -#else #define pch_suspend NULL #define pch_resume NULL -#endif static void pch_remove(struct pci_dev *pdev) { @@ -684,13 +652,14 @@ static const struct pci_device_id pch_ieee1588_pcidev_id[] = { {0} }; +static SIMPLE_DEV_PM_OPS(pch_pm_ops, pch_suspend, pch_resume); + static struct pci_driver pch_driver = { .name = KBUILD_MODNAME, .id_table = pch_ieee1588_pcidev_id, .probe = pch_probe, .remove = pch_remove, - .suspend = pch_suspend, - .resume = pch_resume, + .driver.pm = &pch_pm_ops, }; static void __exit ptp_pch_exit(void)