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>
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@ -4,7 +4,10 @@ Available on Marvell SOCs: Armada 370 and Armada XP
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Required properties:
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- compatible: "marvell,coherency-fabric"
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- compatible: the possible values are:
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* "marvell,coherency-fabric", to be used for the coherency fabric of
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the Armada 370 and Armada XP.
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- reg: Should contain coherency fabric registers location and
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length. First pair for the coherency fabric registers, second pair
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@ -38,8 +38,13 @@ static void __iomem *coherency_cpu_base;
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#define IO_SYNC_BARRIER_CTL_OFFSET 0x0
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enum {
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COHERENCY_FABRIC_TYPE_ARMADA_370_XP,
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};
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static struct of_device_id of_coherency_table[] = {
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{.compatible = "marvell,coherency-fabric"},
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{.compatible = "marvell,coherency-fabric",
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.data = (void *) COHERENCY_FABRIC_TYPE_ARMADA_370_XP },
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{ /* end of list */ },
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};
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@ -121,14 +126,10 @@ static struct notifier_block mvebu_hwcc_platform_nb = {
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.notifier_call = mvebu_hwcc_platform_notifier,
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};
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int __init coherency_init(void)
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static void __init armada_370_coherency_init(struct device_node *np)
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{
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struct device_node *np;
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np = of_find_matching_node(NULL, of_coherency_table);
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if (np) {
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struct resource res;
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pr_info("Initializing Coherency fabric\n");
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of_address_to_resource(np, 0, &res);
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coherency_phys_base = res.start;
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/*
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@ -141,6 +142,24 @@ int __init coherency_init(void)
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coherency_base = of_iomap(np, 0);
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coherency_cpu_base = of_iomap(np, 1);
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set_cpu_coherent(cpu_logical_map(smp_processor_id()), 0);
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}
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int __init coherency_init(void)
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{
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struct device_node *np;
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np = of_find_matching_node(NULL, of_coherency_table);
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if (np) {
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const struct of_device_id *match =
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of_match_node(of_coherency_table, np);
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int type;
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type = (int) match->data;
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pr_info("Initializing Coherency fabric\n");
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if (type == COHERENCY_FABRIC_TYPE_ARMADA_370_XP)
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armada_370_coherency_init(np);
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of_node_put(np);
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}
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