kevin/linux
1
Fork 0
Code
adc218676e
linux/drivers/pci/pwrctl/Kconfig

13 lines
175 B
Plaintext
Raw Normal View History

PCI/pwrctl: Add PCI power control core code Some PCI devices must be powered-on before they can be detected on the bus. Introduce a simple framework reusing the existing PCI OF infrastructure. The way this works is: a DT node representing a PCI device connected to the port can be matched against its power control platform driver. If the match succeeds, the driver is responsible for powering-up the device and calling pci_pwrctl_device_set_ready() which will trigger a PCI bus rescan as well as subscribe to PCI bus notifications. When the device is detected and created, we'll make it consume the same DT node that the platform device did. When the device is bound, we'll create a device link between it and the parent power control device. Tested-by: Amit Pundir <amit.pundir@linaro.org> Tested-by: Neil Armstrong <neil.armstrong@linaro.org> # on SM8550-QRD, SM8650-QRD & SM8650-HDK Tested-by: Caleb Connolly <caleb.connolly@linaro.org> # OnePlus 8T Acked-by: Bjorn Helgaas <bhelgaas@google.com> Link: https://lore.kernel.org/r/20240612082019.19161-5-brgl@bgdev.pl Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
2024-06-12 01:20:17 -07:00
# SPDX-License-Identifier: GPL-2.0-only
Kconfig: reduce the amount of power sequencing noise Kconfig will ask the user twice about power sequencing: once for the QCom WCN power sequencing driver and then again for the PCI power control driver using it. Let's automate the selection of PCI_PWRCTL by introducing a new hidden symbol: HAVE_PWRCTL which should be selected by all platforms that have the need to include PCI power control code (right now: only ARCH_QCOM). The pwrseq-based PCI pwrctl driver itself will then be selected by the drivers binding to devices that may require external handling of the power-up sequence (currently: ath11k and ath12k) based on the value of HAVE_PWRCTL. Make all PCI pwrctl Kconfig symbols hidden so that no questions are asked during configuration. Fixes: 4565d2652a37 ("PCI/pwrctl: Add PCI power control core code") Reported-by: Linus Torvalds <torvalds@linux-foundation.org> Closes: https://lore.kernel.org/lkml/CAHk-=wjWc5dzcj2O1tEgNHY1rnQW63JwtuZi_vAZPqy6wqpoUQ@mail.gmail.com/ Acked-by: Jeff Johnson <quic_jjohnson@quicinc.com> # drivers/net/wireless/ath Link: https://lore.kernel.org/r/20240717142803.53248-1-brgl@bgdev.pl Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
2024-07-17 07:28:03 -07:00
config HAVE_PWRCTL
bool
PCI/pwrctl: Add PCI power control core code Some PCI devices must be powered-on before they can be detected on the bus. Introduce a simple framework reusing the existing PCI OF infrastructure. The way this works is: a DT node representing a PCI device connected to the port can be matched against its power control platform driver. If the match succeeds, the driver is responsible for powering-up the device and calling pci_pwrctl_device_set_ready() which will trigger a PCI bus rescan as well as subscribe to PCI bus notifications. When the device is detected and created, we'll make it consume the same DT node that the platform device did. When the device is bound, we'll create a device link between it and the parent power control device. Tested-by: Amit Pundir <amit.pundir@linaro.org> Tested-by: Neil Armstrong <neil.armstrong@linaro.org> # on SM8550-QRD, SM8650-QRD & SM8650-HDK Tested-by: Caleb Connolly <caleb.connolly@linaro.org> # OnePlus 8T Acked-by: Bjorn Helgaas <bhelgaas@google.com> Link: https://lore.kernel.org/r/20240612082019.19161-5-brgl@bgdev.pl Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
2024-06-12 01:20:17 -07:00
config PCI_PWRCTL
tristate
PCI/pwrctl: Add a PCI power control driver for power sequenced devices Add a PCI power control driver that's capable of correctly powering up devices using the power sequencing subsystem. The first users of this driver are the ath11k module on QCA6390 and ath12k on WCN7850. These packages require a certain delay between enabling the Bluetooth and WLAN modules and the power sequencing subsystem takes care of it behind the scenes. Tested-by: Amit Pundir <amit.pundir@linaro.org> Tested-by: Neil Armstrong <neil.armstrong@linaro.org> # on SM8550-QRD, SM8650-QRD & SM8650-HDK Tested-by: Caleb Connolly <caleb.connolly@linaro.org> # OnePlus 8T Acked-by: Bjorn Helgaas <bhelgaas@google.com> Link: https://lore.kernel.org/r/20240612082019.19161-6-brgl@bgdev.pl Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
2024-06-12 01:20:18 -07:00
config PCI_PWRCTL_PWRSEQ
Kconfig: reduce the amount of power sequencing noise Kconfig will ask the user twice about power sequencing: once for the QCom WCN power sequencing driver and then again for the PCI power control driver using it. Let's automate the selection of PCI_PWRCTL by introducing a new hidden symbol: HAVE_PWRCTL which should be selected by all platforms that have the need to include PCI power control code (right now: only ARCH_QCOM). The pwrseq-based PCI pwrctl driver itself will then be selected by the drivers binding to devices that may require external handling of the power-up sequence (currently: ath11k and ath12k) based on the value of HAVE_PWRCTL. Make all PCI pwrctl Kconfig symbols hidden so that no questions are asked during configuration. Fixes: 4565d2652a37 ("PCI/pwrctl: Add PCI power control core code") Reported-by: Linus Torvalds <torvalds@linux-foundation.org> Closes: https://lore.kernel.org/lkml/CAHk-=wjWc5dzcj2O1tEgNHY1rnQW63JwtuZi_vAZPqy6wqpoUQ@mail.gmail.com/ Acked-by: Jeff Johnson <quic_jjohnson@quicinc.com> # drivers/net/wireless/ath Link: https://lore.kernel.org/r/20240717142803.53248-1-brgl@bgdev.pl Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
2024-07-17 07:28:03 -07:00
tristate
PCI/pwrctl: Add a PCI power control driver for power sequenced devices Add a PCI power control driver that's capable of correctly powering up devices using the power sequencing subsystem. The first users of this driver are the ath11k module on QCA6390 and ath12k on WCN7850. These packages require a certain delay between enabling the Bluetooth and WLAN modules and the power sequencing subsystem takes care of it behind the scenes. Tested-by: Amit Pundir <amit.pundir@linaro.org> Tested-by: Neil Armstrong <neil.armstrong@linaro.org> # on SM8550-QRD, SM8650-QRD & SM8650-HDK Tested-by: Caleb Connolly <caleb.connolly@linaro.org> # OnePlus 8T Acked-by: Bjorn Helgaas <bhelgaas@google.com> Link: https://lore.kernel.org/r/20240612082019.19161-6-brgl@bgdev.pl Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
2024-06-12 01:20:18 -07:00
select POWER_SEQUENCING
select PCI_PWRCTL
Copy Permalink