ARM: mvebu: prepare coherency code to support more SOCs

The code that handles the coherency fabric of Armada 370 and Armada XP
in arch/arm/mach-mvebu/coherency.c made the assumption that there was
only one type of coherency fabric. Unfortunately, it turns out that
upcoming SoCs have a slightly different coherency unit.

In preparation to the introduction of the coherency support for more
SoCs, this commit:

 * Introduces a data associated to the compatible string in the
   compatible string match table, so that the code can differantiate
   the variant of coherency unit being used.

 * Separates the coherency unit initialization code into its own
   function.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Link: https://lkml.kernel.org/r/1397483228-25625-2-git-send-email-thomas.petazzoni@free-electrons.com
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
This commit is contained in:
Thomas Petazzoni 2014-04-14 15:46:59 +02:00 коммит произвёл Jason Cooper
Родитель 56a705a48e
Коммит 924d38f404
2 изменённых файлов: 37 добавлений и 15 удалений

Просмотреть файл

@ -4,7 +4,10 @@ Available on Marvell SOCs: Armada 370 and Armada XP
Required properties:
- compatible: "marvell,coherency-fabric"
- compatible: the possible values are:
* "marvell,coherency-fabric", to be used for the coherency fabric of
the Armada 370 and Armada XP.
- reg: Should contain coherency fabric registers location and
length. First pair for the coherency fabric registers, second pair

Просмотреть файл

@ -38,8 +38,13 @@ static void __iomem *coherency_cpu_base;
#define IO_SYNC_BARRIER_CTL_OFFSET 0x0
enum {
COHERENCY_FABRIC_TYPE_ARMADA_370_XP,
};
static struct of_device_id of_coherency_table[] = {
{.compatible = "marvell,coherency-fabric"},
{.compatible = "marvell,coherency-fabric",
.data = (void *) COHERENCY_FABRIC_TYPE_ARMADA_370_XP },
{ /* end of list */ },
};
@ -121,14 +126,10 @@ static struct notifier_block mvebu_hwcc_platform_nb = {
.notifier_call = mvebu_hwcc_platform_notifier,
};
int __init coherency_init(void)
static void __init armada_370_coherency_init(struct device_node *np)
{
struct device_node *np;
np = of_find_matching_node(NULL, of_coherency_table);
if (np) {
struct resource res;
pr_info("Initializing Coherency fabric\n");
of_address_to_resource(np, 0, &res);
coherency_phys_base = res.start;
/*
@ -141,6 +142,24 @@ int __init coherency_init(void)
coherency_base = of_iomap(np, 0);
coherency_cpu_base = of_iomap(np, 1);
set_cpu_coherent(cpu_logical_map(smp_processor_id()), 0);
}
int __init coherency_init(void)
{
struct device_node *np;
np = of_find_matching_node(NULL, of_coherency_table);
if (np) {
const struct of_device_id *match =
of_match_node(of_coherency_table, np);
int type;
type = (int) match->data;
pr_info("Initializing Coherency fabric\n");
if (type == COHERENCY_FABRIC_TYPE_ARMADA_370_XP)
armada_370_coherency_init(np);
of_node_put(np);
}