Commit 9db82620 authored by Manivannan Sadhasivam's avatar Manivannan Sadhasivam Committed by Bjorn Helgaas
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PCI/pwrctrl: Create pwrctrl device if graph port is found 



The devicetree node of the PCIe Root Port/Slot could have the graph port to
link the PCIe M.2 connector node. Since the M.2 connectors are modeled as
Power Sequencing devices, they need to be controlled by the pwrctrl driver
like the Root Port/Slot supplies.

Hence, create the pwrctrl device if the graph port is found in the node.

Signed-off-by: default avatarManivannan Sadhasivam <manivannan.sadhasivam@oss.qualcomm.com>
Signed-off-by: default avatarBjorn Helgaas <bhelgaas@google.com>
Reviewed-by: default avatarBartosz Golaszewski <bartosz.golaszewski@linaro.org>
Link: https://patch.msgid.link/20260128-pci-m2-v7-2-9b3a5fe3d244@oss.qualcomm.com
parent 9cb64f61

drivers/pci/pwrctrl/core.c

+4 −3
Original line number Diff line number Diff line
@@ -9,6 +9,7 @@ 
#include <linux/export.h>

#include <linux/kernel.h>

#include <linux/of.h>

#include <linux/of_graph.h>

#include <linux/of_platform.h>

#include <linux/pci.h>

#include <linux/pci-pwrctrl.h>
@@ -295,10 +296,10 @@ static int pci_pwrctrl_create_device(struct device_node *np, 


	/*

	 * Check whether the pwrctrl device really needs to be created or not.

	 * This is decided based on at least one of the power supplies being

	 * defined in the devicetree node of the device.

	 * This is decided based on at least one of the power supplies defined

	 * in the devicetree node of the device or the graph property.

	 */

	if (!of_pci_supply_present(np)) {

	if (!of_pci_supply_present(np) && !of_graph_is_present(np)) {

		dev_dbg(parent, "Skipping OF node: %s\n", np->name);

		return 0;

	}