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-rw-r--r--arch/arm/mach-keystone/keystone.c26
1 files changed, 26 insertions, 0 deletions
diff --git a/arch/arm/mach-keystone/keystone.c b/arch/arm/mach-keystone/keystone.c
index 155eb062e8d1..59b8383cbdb0 100644
--- a/arch/arm/mach-keystone/keystone.c
+++ b/arch/arm/mach-keystone/keystone.c
@@ -31,6 +31,27 @@
#define PLL_RESET BIT(16)
static void __iomem *keystone_rstctrl;
+static struct notifier_block platform_nb;
+static unsigned long keystone_dma_pfn_offset __read_mostly;
+
+static int keystone_platform_notifier(struct notifier_block *nb,
+ unsigned long event, void *data)
+{
+ struct device *dev = data;
+
+ if (event != BUS_NOTIFY_ADD_DEVICE)
+ return NOTIFY_DONE;
+
+ if (!dev)
+ return NOTIFY_BAD;
+
+ if (!dev->of_node) {
+ dev->dma_pfn_offset = keystone_dma_pfn_offset;
+ dev_err(dev, "set dma_pfn_offset%08lx\n",
+ dev->dma_pfn_offset);
+ }
+ return NOTIFY_OK;
+}
static void __init keystone_init(void)
{
@@ -45,6 +66,8 @@ static void __init keystone_init(void)
pr_warn("ti,keystone-reset iomap error\n");
keystone_pm_runtime_init();
+ if (platform_nb.notifier_call)
+ bus_register_notifier(&platform_bus_type, &platform_nb);
of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
}
@@ -88,6 +111,9 @@ static void __init keystone_init_meminfo(void)
/* Populate the arch idmap hook */
arch_virt_to_idmap = keystone_virt_to_idmap;
+ platform_nb.notifier_call = keystone_platform_notifier;
+ keystone_dma_pfn_offset = PFN_DOWN(KEYSTONE_HIGH_PHYS_START -
+ KEYSTONE_LOW_PHYS_START);
pr_info("Switching to high address space at 0x%llx\n", (u64)offset);
}