From mboxrd@z Thu Jan 1 00:00:00 1970 From: tushar.behera@linaro.org (Tushar Behera) Date: Fri, 9 Aug 2013 15:35:14 +0530 Subject: [PATCH] ARM: EXYNOS: Set 64-bit DMA mask for EXYNOS5250 Message-ID: <1376042714-26513-1-git-send-email-tushar.behera@linaro.org> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org When LPAE is enabled, we need to set 64bit DMA mask bits. Signed-off-by: Tushar Behera --- Based on v3.11-rc4. arch/arm/mach-exynos/mach-exynos5-dt.c | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+) diff --git a/arch/arm/mach-exynos/mach-exynos5-dt.c b/arch/arm/mach-exynos/mach-exynos5-dt.c index f874b77..2217631 100644 --- a/arch/arm/mach-exynos/mach-exynos5-dt.c +++ b/arch/arm/mach-exynos/mach-exynos5-dt.c @@ -14,6 +14,7 @@ #include #include #include +#include #include #include @@ -23,6 +24,26 @@ #include "common.h" +static u64 dma_mask64 = DMA_BIT_MASK(64); + +static int exynos5250_platform_notifier(struct notifier_block *nb, + unsigned long event, void *__dev) +{ + struct device *dev = __dev; + + if (event != BUS_NOTIFY_ADD_DEVICE) + return NOTIFY_DONE; + + dev->dma_mask = &dma_mask64; + dev->coherent_dma_mask = DMA_BIT_MASK(64); + + return NOTIFY_OK; +} + +static struct notifier_block exynos5250_platform_nb = { + .notifier_call = exynos5250_platform_notifier, +}; + static void __init exynos5_dt_machine_init(void) { struct device_node *i2c_np; @@ -47,6 +68,11 @@ static void __init exynos5_dt_machine_init(void) } } + if (config_enabled(CONFIG_ARM_LPAE) && + of_machine_is_compatible("samsung,exynos5250")) + bus_register_notifier(&platform_bus_type, + &exynos5250_platform_nb); + of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL); } -- 1.7.9.5