Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 25a31579 authored by Gregory CLEMENT's avatar Gregory CLEMENT Committed by Grant Likely
Browse files

of: Allows to use the PCI translator without the PCI core 



Translating an address from a PCI node of the device-tree into a CPU
physical address doesn't require the core PCI support. Those
translations are just related to the device tree itself.

The use case to translate an address from a PCI node without actually
using the PCI core support is when one needs to access the PCI
controller without accessing any PCI devices.

Marvell SoCs, such as Kirkwood, Dove or Armada XP for instance, come
with an IP of a PCI controller. In the registers of this controller
are stored the ID and the revision of a SoC. With this patch it will
be possible to read the SoC ID of a board without any PCI device and
then without the PCI core support.

Signed-off-by: default avatarGregory CLEMENT <gregory.clement@free-electrons.com>
Tested-by: default avatarEzequiel Garcia <ezequiel.garcia@free-electrons.com>
Reviewed-by: default avatarEzequiel Garcia <ezequiel.garcia@free-electrons.com>
Signed-off-by: default avatarGrant Likely <grant.likely@linaro.org>
parent b66548e2

drivers/of/Kconfig

+4 −0
Original line number Diff line number Diff line
@@ -44,6 +44,10 @@ config OF_DYNAMIC 
config OF_ADDRESS

	def_bool y

	depends on !SPARC

	select OF_ADDRESS_PCI if PCI



config OF_ADDRESS_PCI

	bool



config OF_IRQ

	def_bool y

drivers/of/address.c

+5 −3
Original line number Diff line number Diff line
@@ -91,7 +91,7 @@ static unsigned int of_bus_default_get_flags(const __be32 *addr) 
	return IORESOURCE_MEM;

}



#ifdef CONFIG_PCI

#ifdef CONFIG_OF_ADDRESS_PCI

/*

 * PCI bus specific translator

 */
@@ -165,7 +165,9 @@ static int of_bus_pci_translate(__be32 *addr, u64 offset, int na) 
{

	return of_bus_default_translate(addr + 1, offset, na - 1);

}

#endif /* CONFIG_OF_ADDRESS_PCI */



#ifdef CONFIG_PCI

const __be32 *of_get_pci_address(struct device_node *dev, int bar_no, u64 *size,

			unsigned int *flags)

{
@@ -355,7 +357,7 @@ static unsigned int of_bus_isa_get_flags(const __be32 *addr) 
 */



static struct of_bus of_busses[] = {

#ifdef CONFIG_PCI

#ifdef CONFIG_OF_ADDRESS_PCI

	/* PCI */

	{

		.name = "pci",
@@ -366,7 +368,7 @@ static struct of_bus of_busses[] = { 
		.translate = of_bus_pci_translate,

		.get_flags = of_bus_pci_get_flags,

	},

#endif /* CONFIG_PCI */

#endif /* CONFIG_OF_ADDRESS_PCI */

	/* ISA */

	{

		.name = "isa",