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PCI/pwrctrl: Rename pwrctrl functions and structures

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Rename pwrctrl functions and structures from "pwrctl" to "pwrctrl" to match
the similar file renames.

Link: https://lore.kernel.org/r/20241115214428.2061153-3-helgaas@kernel.org
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org>
Acked-by: Krzysztof Wilczyński <kw@linux.com>
This commit is contained in:
Bjorn Helgaas 2024-11-15 15:44:28 -06:00 • committed by Krzysztof Wilczyński
parent b88cbaaa6f
commit 3f925cd628
No known key found for this signature in database
GPG key ID: 7C64768D3DE334E7
5 changed files with 81 additions and 79 deletions
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25
drivers/pci/bus.c
View file

@ -322,10 +322,10 @@ void __weak pcibios_resource_survey_bus(struct pci_bus *bus) { }
void __weak pcibios_bus_add_device(struct pci_dev *pdev) { } void __weak pcibios_bus_add_device(struct pci_dev *pdev) { }
/* /*
* Create pwrctl devices (if required) for the PCI devices to handle the power * Create pwrctrl devices (if required) for the PCI devices to handle the power
* state. * state.
*/ */
static void pci_pwrctl_create_devices(struct pci_dev *dev) static void pci_pwrctrl_create_devices(struct pci_dev *dev)
{ {
struct device_node *np = dev_of_node(&dev->dev); struct device_node *np = dev_of_node(&dev->dev);
struct device *parent = &dev->dev; struct device *parent = &dev->dev;
@ -337,23 +337,24 @@ static void pci_pwrctl_create_devices(struct pci_dev *dev)
*/ */
if (np && pci_is_bridge(dev)) { if (np && pci_is_bridge(dev)) {
/* /*
* Now look for the child PCI device nodes and create pwrctl * Now look for the child PCI device nodes and create pwrctrl
* devices for them. The pwrctl device drivers will manage the * devices for them. The pwrctrl device drivers will manage the
* power state of the devices. * power state of the devices.
*/ */
for_each_available_child_of_node_scoped(np, child) { for_each_available_child_of_node_scoped(np, child) {
/* /*
* First check whether the pwrctl device really needs to * First check whether the pwrctrl device really
* be created or not. This is decided based on at least * needs to be created or not. This is decided
* one of the power supplies being defined in the * based on at least one of the power supplies
* devicetree node of the device. * being defined in the devicetree node of the
* device.
*/ */
if (!of_pci_supply_present(child)) { if (!of_pci_supply_present(child)) {
pci_dbg(dev, "skipping OF node: %s\n", child->name); pci_dbg(dev, "skipping OF node: %s\n", child->name);
return; return;
} }
/* Now create the pwrctl device */ /* Now create the pwrctrl device */
pdev = of_platform_device_create(child, NULL, parent); pdev = of_platform_device_create(child, NULL, parent);
if (!pdev) if (!pdev)
pci_err(dev, "failed to create OF node: %s\n", child->name); pci_err(dev, "failed to create OF node: %s\n", child->name);
@ -385,12 +386,12 @@ void pci_bus_add_device(struct pci_dev *dev)
pci_proc_attach_device(dev); pci_proc_attach_device(dev);
pci_bridge_d3_update(dev); pci_bridge_d3_update(dev);
pci_pwrctl_create_devices(dev); pci_pwrctrl_create_devices(dev);
/* /*
* If the PCI device is associated with a pwrctl device with a * If the PCI device is associated with a pwrctrl device with a
* power supply, create a device link between the PCI device and * power supply, create a device link between the PCI device and
* pwrctl device. This ensures that pwrctl drivers are probed * pwrctrl device. This ensures that pwrctrl drivers are probed
* before PCI client drivers. * before PCI client drivers.
*/ */
pdev = of_find_device_by_node(dn); pdev = of_find_device_by_node(dn);

77
drivers/pci/pwrctrl/core.c
View file

@ -11,13 +11,13 @@
#include <linux/property.h> #include <linux/property.h>
#include <linux/slab.h> #include <linux/slab.h>
static int pci_pwrctl_notify(struct notifier_block *nb, unsigned long action, static int pci_pwrctrl_notify(struct notifier_block *nb, unsigned long action,
void *data) void *data)
{ {
struct pci_pwrctl *pwrctl = container_of(nb, struct pci_pwrctl, nb); struct pci_pwrctrl *pwrctrl = container_of(nb, struct pci_pwrctrl, nb);
struct device *dev = data; struct device *dev = data;
if (dev_fwnode(dev) != dev_fwnode(pwrctl->dev)) if (dev_fwnode(dev) != dev_fwnode(pwrctrl->dev))
return NOTIFY_DONE; return NOTIFY_DONE;
switch (action) { switch (action) {
@ -40,31 +40,32 @@ static int pci_pwrctl_notify(struct notifier_block *nb, unsigned long action,
static void rescan_work_func(struct work_struct *work) static void rescan_work_func(struct work_struct *work)
{ {
struct pci_pwrctl *pwrctl = container_of(work, struct pci_pwrctl, work); struct pci_pwrctrl *pwrctrl = container_of(work,
struct pci_pwrctrl, work);
pci_lock_rescan_remove(); pci_lock_rescan_remove();
pci_rescan_bus(to_pci_dev(pwrctl->dev->parent)->bus); pci_rescan_bus(to_pci_dev(pwrctrl->dev->parent)->bus);
pci_unlock_rescan_remove(); pci_unlock_rescan_remove();
} }
/** /**
* pci_pwrctl_init() - Initialize the PCI power control context struct * pci_pwrctrl_init() - Initialize the PCI power control context struct
* *
* @pwrctl: PCI power control data * @pwrctrl: PCI power control data
* @dev: Parent device * @dev: Parent device
*/ */
void pci_pwrctl_init(struct pci_pwrctl *pwrctl, struct device *dev) void pci_pwrctrl_init(struct pci_pwrctrl *pwrctrl, struct device *dev)
{ {
pwrctl->dev = dev; pwrctrl->dev = dev;
INIT_WORK(&pwrctl->work, rescan_work_func); INIT_WORK(&pwrctrl->work, rescan_work_func);
} }
EXPORT_SYMBOL_GPL(pci_pwrctl_init); EXPORT_SYMBOL_GPL(pci_pwrctrl_init);
/** /**
* pci_pwrctl_device_set_ready() - Notify the pwrctl subsystem that the PCI * pci_pwrctrl_device_set_ready() - Notify the pwrctrl subsystem that the PCI
* device is powered-up and ready to be detected. * device is powered-up and ready to be detected.
* *
* @pwrctl: PCI power control data. * @pwrctrl: PCI power control data.
* *
* Returns: * Returns:
* 0 on success, negative error number on error. * 0 on success, negative error number on error.
@ -74,31 +75,31 @@ EXPORT_SYMBOL_GPL(pci_pwrctl_init);
* that the bus rescan was successfully started. The device will get bound to * that the bus rescan was successfully started. The device will get bound to
* its PCI driver asynchronously. * its PCI driver asynchronously.
*/ */
int pci_pwrctl_device_set_ready(struct pci_pwrctl *pwrctl) int pci_pwrctrl_device_set_ready(struct pci_pwrctrl *pwrctrl)
{ {
int ret; int ret;
if (!pwrctl->dev) if (!pwrctrl->dev)
return -ENODEV; return -ENODEV;
pwrctl->nb.notifier_call = pci_pwrctl_notify; pwrctrl->nb.notifier_call = pci_pwrctrl_notify;
ret = bus_register_notifier(&pci_bus_type, &pwrctl->nb); ret = bus_register_notifier(&pci_bus_type, &pwrctrl->nb);
if (ret) if (ret)
return ret; return ret;
schedule_work(&pwrctl->work); schedule_work(&pwrctrl->work);
return 0; return 0;
} }
EXPORT_SYMBOL_GPL(pci_pwrctl_device_set_ready); EXPORT_SYMBOL_GPL(pci_pwrctrl_device_set_ready);
/** /**
* pci_pwrctl_device_unset_ready() - Notify the pwrctl subsystem that the PCI * pci_pwrctrl_device_unset_ready() - Notify the pwrctrl subsystem that the PCI
* device is about to be powered-down. * device is about to be powered-down.
* *
* @pwrctl: PCI power control data. * @pwrctrl: PCI power control data.
*/ */
void pci_pwrctl_device_unset_ready(struct pci_pwrctl *pwrctl) void pci_pwrctrl_device_unset_ready(struct pci_pwrctrl *pwrctrl)
{ {
/* /*
* We don't have to delete the link here. Typically, this function * We don't have to delete the link here. Typically, this function
@ -106,41 +107,41 @@ void pci_pwrctl_device_unset_ready(struct pci_pwrctl *pwrctl)
* it is being detached then the child PCI device must have already * it is being detached then the child PCI device must have already
* been unbound too or the device core wouldn't let us unbind. * been unbound too or the device core wouldn't let us unbind.
*/ */
bus_unregister_notifier(&pci_bus_type, &pwrctl->nb); bus_unregister_notifier(&pci_bus_type, &pwrctrl->nb);
} }
EXPORT_SYMBOL_GPL(pci_pwrctl_device_unset_ready); EXPORT_SYMBOL_GPL(pci_pwrctrl_device_unset_ready);
static void devm_pci_pwrctl_device_unset_ready(void *data) static void devm_pci_pwrctrl_device_unset_ready(void *data)
{ {
struct pci_pwrctl *pwrctl = data; struct pci_pwrctrl *pwrctrl = data;
pci_pwrctl_device_unset_ready(pwrctl); pci_pwrctrl_device_unset_ready(pwrctrl);
} }
/** /**
* devm_pci_pwrctl_device_set_ready - Managed variant of * devm_pci_pwrctrl_device_set_ready - Managed variant of
* pci_pwrctl_device_set_ready(). * pci_pwrctrl_device_set_ready().
* *
* @dev: Device managing this pwrctl provider. * @dev: Device managing this pwrctrl provider.
* @pwrctl: PCI power control data. * @pwrctrl: PCI power control data.
* *
* Returns: * Returns:
* 0 on success, negative error number on error. * 0 on success, negative error number on error.
*/ */
int devm_pci_pwrctl_device_set_ready(struct device *dev, int devm_pci_pwrctrl_device_set_ready(struct device *dev,
struct pci_pwrctl *pwrctl) struct pci_pwrctrl *pwrctrl)
{ {
int ret; int ret;
ret = pci_pwrctl_device_set_ready(pwrctl); ret = pci_pwrctrl_device_set_ready(pwrctrl);
if (ret) if (ret)
return ret; return ret;
return devm_add_action_or_reset(dev, return devm_add_action_or_reset(dev,
devm_pci_pwrctl_device_unset_ready, devm_pci_pwrctrl_device_unset_ready,
pwrctl); pwrctrl);
} }
EXPORT_SYMBOL_GPL(devm_pci_pwrctl_device_set_ready); EXPORT_SYMBOL_GPL(devm_pci_pwrctrl_device_set_ready);
MODULE_AUTHOR("Bartosz Golaszewski <bartosz.golaszewski@linaro.org>"); MODULE_AUTHOR("Bartosz Golaszewski <bartosz.golaszewski@linaro.org>");
MODULE_DESCRIPTION("PCI Device Power Control core driver"); MODULE_DESCRIPTION("PCI Device Power Control core driver");

32
drivers/pci/pwrctrl/pci-pwrctrl-pwrseq.c
View file

@ -13,21 +13,21 @@
#include <linux/slab.h> #include <linux/slab.h>
#include <linux/types.h> #include <linux/types.h>
struct pci_pwrctl_pwrseq_data { struct pci_pwrctrl_pwrseq_data {
struct pci_pwrctl ctx; struct pci_pwrctrl ctx;
struct pwrseq_desc *pwrseq; struct pwrseq_desc *pwrseq;
}; };
static void devm_pci_pwrctl_pwrseq_power_off(void *data) static void devm_pci_pwrctrl_pwrseq_power_off(void *data)
{ {
struct pwrseq_desc *pwrseq = data; struct pwrseq_desc *pwrseq = data;
pwrseq_power_off(pwrseq); pwrseq_power_off(pwrseq);
} }
static int pci_pwrctl_pwrseq_probe(struct platform_device *pdev) static int pci_pwrctrl_pwrseq_probe(struct platform_device *pdev)
{ {
struct pci_pwrctl_pwrseq_data *data; struct pci_pwrctrl_pwrseq_data *data;
struct device *dev = &pdev->dev; struct device *dev = &pdev->dev;
int ret; int ret;
@ -45,22 +45,22 @@ static int pci_pwrctl_pwrseq_probe(struct platform_device *pdev)
return dev_err_probe(dev, ret, return dev_err_probe(dev, ret,
"Failed to power-on the device\n"); "Failed to power-on the device\n");
ret = devm_add_action_or_reset(dev, devm_pci_pwrctl_pwrseq_power_off, ret = devm_add_action_or_reset(dev, devm_pci_pwrctrl_pwrseq_power_off,
data->pwrseq); data->pwrseq);
if (ret) if (ret)
return ret; return ret;
pci_pwrctl_init(&data->ctx, dev); pci_pwrctrl_init(&data->ctx, dev);
ret = devm_pci_pwrctl_device_set_ready(dev, &data->ctx); ret = devm_pci_pwrctrl_device_set_ready(dev, &data->ctx);
if (ret) if (ret)
return dev_err_probe(dev, ret, return dev_err_probe(dev, ret,
"Failed to register the pwrctl wrapper\n"); "Failed to register the pwrctrl wrapper\n");
return 0; return 0;
} }
static const struct of_device_id pci_pwrctl_pwrseq_of_match[] = { static const struct of_device_id pci_pwrctrl_pwrseq_of_match[] = {
{ {
/* ATH11K in QCA6390 package. */ /* ATH11K in QCA6390 package. */
.compatible = "pci17cb,1101", .compatible = "pci17cb,1101",
@ -78,16 +78,16 @@ static const struct of_device_id pci_pwrctl_pwrseq_of_match[] = {
}, },
{ } { }
}; };
MODULE_DEVICE_TABLE(of, pci_pwrctl_pwrseq_of_match); MODULE_DEVICE_TABLE(of, pci_pwrctrl_pwrseq_of_match);
static struct platform_driver pci_pwrctl_pwrseq_driver = { static struct platform_driver pci_pwrctrl_pwrseq_driver = {
.driver = { .driver = {
.name = "pci-pwrctl-pwrseq", .name = "pci-pwrctrl-pwrseq",
.of_match_table = pci_pwrctl_pwrseq_of_match, .of_match_table = pci_pwrctrl_pwrseq_of_match,
}, },
.probe = pci_pwrctl_pwrseq_probe, .probe = pci_pwrctrl_pwrseq_probe,
}; };
module_platform_driver(pci_pwrctl_pwrseq_driver); module_platform_driver(pci_pwrctrl_pwrseq_driver);
MODULE_AUTHOR("Bartosz Golaszewski <bartosz.golaszewski@linaro.org>"); MODULE_AUTHOR("Bartosz Golaszewski <bartosz.golaszewski@linaro.org>");
MODULE_DESCRIPTION("Generic PCI Power Control module for power sequenced devices"); MODULE_DESCRIPTION("Generic PCI Power Control module for power sequenced devices");

4
drivers/pci/remove.c
View file

@ -17,7 +17,7 @@ static void pci_free_resources(struct pci_dev *dev)
} }
} }
static void pci_pwrctl_unregister(struct device *dev) static void pci_pwrctrl_unregister(struct device *dev)
{ {
struct platform_device *pdev; struct platform_device *pdev;
@ -34,7 +34,7 @@ static void pci_stop_dev(struct pci_dev *dev)
pci_pme_active(dev, false); pci_pme_active(dev, false);
if (pci_dev_is_added(dev)) { if (pci_dev_is_added(dev)) {
pci_pwrctl_unregister(&dev->dev); pci_pwrctrl_unregister(&dev->dev);
device_release_driver(&dev->dev); device_release_driver(&dev->dev);
pci_proc_detach_device(dev); pci_proc_detach_device(dev);
pci_remove_sysfs_dev_files(dev); pci_remove_sysfs_dev_files(dev);

22
include/linux/pci-pwrctrl.h
View file

@ -3,8 +3,8 @@
* Copyright (C) 2024 Linaro Ltd. * Copyright (C) 2024 Linaro Ltd.
*/ */
#ifndef __PCI_PWRCTL_H__ #ifndef __PCI_PWRCTRL_H__
#define __PCI_PWRCTL_H__ #define __PCI_PWRCTRL_H__
#include <linux/notifier.h> #include <linux/notifier.h>
#include <linux/workqueue.h> #include <linux/workqueue.h>
@ -29,14 +29,14 @@ struct device_link;
*/ */
/** /**
* struct pci_pwrctl - PCI device power control context. * struct pci_pwrctrl - PCI device power control context.
* @dev: Address of the power controlling device. * @dev: Address of the power controlling device.
* *
* An object of this type must be allocated by the PCI power control device and * An object of this type must be allocated by the PCI power control device and
* passed to the pwrctl subsystem to trigger a bus rescan and setup a device * passed to the pwrctrl subsystem to trigger a bus rescan and setup a device
* link with the device once it's up. * link with the device once it's up.
*/ */
struct pci_pwrctl { struct pci_pwrctrl {
struct device *dev; struct device *dev;
/* Private: don't use. */ /* Private: don't use. */
@ -45,10 +45,10 @@ struct pci_pwrctl {
struct work_struct work; struct work_struct work;
}; };
void pci_pwrctl_init(struct pci_pwrctl *pwrctl, struct device *dev); void pci_pwrctrl_init(struct pci_pwrctrl *pwrctrl, struct device *dev);
int pci_pwrctl_device_set_ready(struct pci_pwrctl *pwrctl); int pci_pwrctrl_device_set_ready(struct pci_pwrctrl *pwrctrl);
void pci_pwrctl_device_unset_ready(struct pci_pwrctl *pwrctl); void pci_pwrctrl_device_unset_ready(struct pci_pwrctrl *pwrctrl);
int devm_pci_pwrctl_device_set_ready(struct device *dev, int devm_pci_pwrctrl_device_set_ready(struct device *dev,
struct pci_pwrctl *pwrctl); struct pci_pwrctrl *pwrctrl);
#endif /* __PCI_PWRCTL_H__ */ #endif /* __PCI_PWRCTRL_H__ */