From 14f3791439b5a6cf12127fb80204265533d92664 Mon Sep 17 00:00:00 2001 From: Santosh Shilimkar Date: Mon, 24 Feb 2014 17:32:59 +0200 Subject: ARM: keystone: Update the dma offset for non-dt platform devices Tested-by: Grygorii Strashko Signed-off-by: Santosh Shilimkar --- arch/arm/mach-keystone/keystone.c | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+) (limited to 'arch/arm') 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); } -- cgit v1.2.3