From: Thomas Abraham <[email protected]> Use a platform bus notifier callback function to set the correct dma_mask and coherent_dma_mask for every device registered on Exynos5440 based machine.
Signed-off-by: Thomas Abraham <[email protected]> Signed-off-by: Kukjin Kim <[email protected]> --- arch/arm/mach-exynos/mach-exynos5-dt.c | 23 +++++++++++++++++++++++ 1 files changed, 23 insertions(+), 0 deletions(-) diff --git a/arch/arm/mach-exynos/mach-exynos5-dt.c b/arch/arm/mach-exynos/mach-exynos5-dt.c index 753b94f..e47c2a5 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> @@ -23,11 +24,30 @@ #include "common.h" +static u64 dma_mask64 = DMA_BIT_MASK(64); + static void __init exynos5_dt_map_io(void) { exynos_init_io(NULL, 0); } +static int exynos5440_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 exynos5440_platform_nb = { + .notifier_call = exynos5440_platform_notifier, +}; + static void __init exynos5_dt_machine_init(void) { struct device_node *i2c_np; @@ -52,6 +72,9 @@ static void __init exynos5_dt_machine_init(void) } } + if (of_machine_is_compatible("samsung,exynos5440")) + bus_register_notifier(&platform_bus_type, &exynos5440_platform_nb); + of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL); } -- 1.7.4.4 -- To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
