diff options
| author | Al Stone <ahs3@redhat.com> | 2013-08-12 20:20:05 -0600 |
|---|---|---|
| committer | Graeme Gregory <graeme.gregory@linaro.org> | 2013-08-13 14:43:15 +0100 |
| commit | 02bfaa73c42bed07cbe30b6b8beb0291f21c403f (patch) | |
| tree | 1447cb95aa51519eea9ab66600f12b67c02d7627 | |
| parent | 3baf3d4b0719fdf4dda0a45d9f6ff6d9b943865a (diff) | |
ARM: EXYNOS: Set 64-bit DMA mask for EXYNOS5250acpi-ltfixes
This patch is a re-submittal of a previous patch from the
Samsung LT, specifically 5bf534ab87a62e717771d5548b66296ca8e9fbe5.
It has been redone to fit the acpi-ltfixes branch of acpi.git,
and is needed to prevent DMA errors from occurring.
This is required when LPAE is enabled.
Signed-off-by: Tushar Behera <tushar.behera@linaro.org>
Signed-off-by: Al Stone <al.stone@linaro.org>
| -rw-r--r-- | arch/arm/mach-exynos/mach-exynos5-dt.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/arch/arm/mach-exynos/mach-exynos5-dt.c b/arch/arm/mach-exynos/mach-exynos5-dt.c index f874b773ca13..863042d720a7 100644 --- a/arch/arm/mach-exynos/mach-exynos5-dt.c +++ b/arch/arm/mach-exynos/mach-exynos5-dt.c @@ -14,6 +14,7 @@ #include <linux/memblock.h> #include <linux/io.h> #include <linux/clocksource.h> +#include <linux/dma-mapping.h> #include <asm/mach/arch.h> #include <mach/regs-pmu.h> @@ -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 +68,9 @@ static void __init exynos5_dt_machine_init(void) } } + if (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); } |