redonkable
/
alistair23-linux
1
0
Fork 0
Code Releases Activity

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: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
hifive-unleashed-5.2
Kishon Vijay Abraham I 2019-03-25 15:09:37 +05:30 committed by Lorenzo Pieralisi
parent b22af42b3e
commit 40e5d614a0
2 changed files with 24 additions and 22 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/pci/Makefile
View File

@ -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/

44
drivers/pci/of.c
View File

@ -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);