| Message ID | 20240528-pwrseq-v8-14-d354d52b763c@linaro.org |
|---|---|
| State | New |
| Headers | show |
| Series | power: sequencing: implement the subsystem and add first users | expand |
On Tue, May 28, 2024 at 09:03:22PM +0200, Bartosz Golaszewski wrote: > From: Bartosz Golaszewski <bartosz.golaszewski@linaro.org> > > In preparation for introducing PCI device power control - a set of > library functions that will allow powering-up of PCI devices before > they're detected on the PCI bus - we need to populate the devices > defined on the device-tree. > > We are reusing the platform bus as it provides us with all the > infrastructure we need to match the pwrctl drivers against the > compatibles from OF nodes. > > These platform devices will be probed by the driver core and bound to > the PCI pwrctl drivers we'll introduce later. > > Tested-by: Amit Pundir <amit.pundir@linaro.org> > Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org> With s/create/Create/ in subject, Acked-by: Bjorn Helgaas <bhelgaas@google.com> > --- > drivers/pci/bus.c | 9 +++++++++ > drivers/pci/remove.c | 3 ++- > 2 files changed, 11 insertions(+), 1 deletion(-) > > diff --git a/drivers/pci/bus.c b/drivers/pci/bus.c > index 826b5016a101..3e3517567721 100644 > --- a/drivers/pci/bus.c > +++ b/drivers/pci/bus.c > @@ -12,6 +12,7 @@ > #include <linux/errno.h> > #include <linux/ioport.h> > #include <linux/of.h> > +#include <linux/of_platform.h> > #include <linux/proc_fs.h> > #include <linux/slab.h> > > @@ -354,6 +355,14 @@ void pci_bus_add_device(struct pci_dev *dev) > pci_warn(dev, "device attach failed (%d)\n", retval); > > pci_dev_assign_added(dev, true); > + > + if (pci_is_bridge(dev)) { > + retval = of_platform_populate(dev->dev.of_node, NULL, NULL, > + &dev->dev); > + if (retval) > + pci_err(dev, "failed to populate child OF nodes (%d)\n", > + retval); > + } > } > EXPORT_SYMBOL_GPL(pci_bus_add_device); > > diff --git a/drivers/pci/remove.c b/drivers/pci/remove.c > index d749ea8250d6..910387e5bdbf 100644 > --- a/drivers/pci/remove.c > +++ b/drivers/pci/remove.c > @@ -1,6 +1,7 @@ > // SPDX-License-Identifier: GPL-2.0 > #include <linux/pci.h> > #include <linux/module.h> > +#include <linux/of_platform.h> > #include "pci.h" > > static void pci_free_resources(struct pci_dev *dev) > @@ -18,7 +19,7 @@ static void pci_stop_dev(struct pci_dev *dev) > pci_pme_active(dev, false); > > if (pci_dev_is_added(dev)) { > - > + of_platform_depopulate(&dev->dev); > device_release_driver(&dev->dev); > pci_proc_detach_device(dev); > pci_remove_sysfs_dev_files(dev); > > -- > 2.43.0 >
diff --git a/drivers/pci/bus.c b/drivers/pci/bus.c index 826b5016a101..3e3517567721 100644 --- a/drivers/pci/bus.c +++ b/drivers/pci/bus.c @@ -12,6 +12,7 @@ #include <linux/errno.h> #include <linux/ioport.h> #include <linux/of.h> +#include <linux/of_platform.h> #include <linux/proc_fs.h> #include <linux/slab.h> @@ -354,6 +355,14 @@ void pci_bus_add_device(struct pci_dev *dev) pci_warn(dev, "device attach failed (%d)\n", retval); pci_dev_assign_added(dev, true); + + if (pci_is_bridge(dev)) { + retval = of_platform_populate(dev->dev.of_node, NULL, NULL, + &dev->dev); + if (retval) + pci_err(dev, "failed to populate child OF nodes (%d)\n", + retval); + } } EXPORT_SYMBOL_GPL(pci_bus_add_device); diff --git a/drivers/pci/remove.c b/drivers/pci/remove.c index d749ea8250d6..910387e5bdbf 100644 --- a/drivers/pci/remove.c +++ b/drivers/pci/remove.c @@ -1,6 +1,7 @@ // SPDX-License-Identifier: GPL-2.0 #include <linux/pci.h> #include <linux/module.h> +#include <linux/of_platform.h> #include "pci.h" static void pci_free_resources(struct pci_dev *dev) @@ -18,7 +19,7 @@ static void pci_stop_dev(struct pci_dev *dev) pci_pme_active(dev, false); if (pci_dev_is_added(dev)) { - + of_platform_depopulate(&dev->dev); device_release_driver(&dev->dev); pci_proc_detach_device(dev); pci_remove_sysfs_dev_files(dev);