Commit 40e5d614 authored by Kishon Vijay Abraham I's avatar Kishon Vijay Abraham I Committed by Lorenzo Pieralisi
Browse files

PCI: OF: Allow of_pci_get_max_link_speed() to be used by PCI Endpoint drivers 



of_pci_get_max_link_speed() is built only if CONFIG_PCI is enabled.
Make of_pci_get_max_link_speed() to be also used by PCI Endpoint
controllers with just CONFIG_PCI_ENDPOINT enabled.

Signed-off-by: default avatarKishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: default avatarSekhar Nori <nsekhar@ti.com>
Signed-off-by: default avatarLorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Acked-by: default avatarBjorn Helgaas <bhelgaas@google.com>
parent b22af42b

drivers/pci/Makefile

+1 −1
Original line number Diff line number Diff line
@@ -10,10 +10,10 @@ obj-$(CONFIG_PCI) += access.o bus.o probe.o host-bridge.o \ 
ifdef CONFIG_PCI

obj-$(CONFIG_PROC_FS)		+= proc.o

obj-$(CONFIG_SYSFS)		+= slot.o

obj-$(CONFIG_OF)		+= of.o

obj-$(CONFIG_ACPI)		+= pci-acpi.o

endif



obj-$(CONFIG_OF)		+= of.o

obj-$(CONFIG_PCI_QUIRKS)	+= quirks.o

obj-$(CONFIG_PCIEPORTBUS)	+= pcie/

obj-$(CONFIG_HOTPLUG_PCI)	+= hotplug/

drivers/pci/of.c

+23 −21
Original line number Diff line number Diff line
@@ -15,6 +15,7 @@ 
#include <linux/of_pci.h>

#include "pci.h"



#ifdef CONFIG_PCI

void pci_set_of_node(struct pci_dev *dev)

{

	if (!dev->bus->dev.of_node)
@@ -196,27 +197,6 @@ int of_get_pci_domain_nr(struct device_node *node) 
}

EXPORT_SYMBOL_GPL(of_get_pci_domain_nr);



/**

 * This function will try to find the limitation of link speed by finding

 * a property called "max-link-speed" of the given device node.

 *

 * @node: device tree node with the max link speed information

 *

 * Returns the associated max link speed from DT, or a negative value if the

 * required property is not found or is invalid.

 */

int of_pci_get_max_link_speed(struct device_node *node)

{

	u32 max_link_speed;



	if (of_property_read_u32(node, "max-link-speed", &max_link_speed) ||

	    max_link_speed > 4)

		return -EINVAL;



	return max_link_speed;

}

EXPORT_SYMBOL_GPL(of_pci_get_max_link_speed);



/**

 * of_pci_check_probe_only - Setup probe only mode if linux,pci-probe-only

 *                           is present and valid
@@ -537,3 +517,25 @@ int pci_parse_request_of_pci_ranges(struct device *dev, 
	return err;

}



#endif /* CONFIG_PCI */



/**

 * This function will try to find the limitation of link speed by finding

 * a property called "max-link-speed" of the given device node.

 *

 * @node: device tree node with the max link speed information

 *

 * Returns the associated max link speed from DT, or a negative value if the

 * required property is not found or is invalid.

 */

int of_pci_get_max_link_speed(struct device_node *node)

{

	u32 max_link_speed;



	if (of_property_read_u32(node, "max-link-speed", &max_link_speed) ||

	    max_link_speed > 4)

		return -EINVAL;



	return max_link_speed;

}

EXPORT_SYMBOL_GPL(of_pci_get_max_link_speed);

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