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| author | Arnd Bergmann <arnd@arndb.de> | 2016-07-07 15:54:54 +0200 |
|---|---|---|
| committer | Arnd Bergmann <arnd@arndb.de> | 2016-07-07 15:54:54 +0200 |
| commit | fc7c0be08448be0445c310b9a2ece48d85c08c7b (patch) | |
| tree | 3474ad8c380ffd11a1f9d54fe075789d79edbab2 /arch | |
| parent | 623149b00e6b34c43a229faf0dc0ad51f37a6da9 (diff) | |
| parent | c4c0e2607abfc86c32a43c9a22b2a256de27dea3 (diff) | |
| download | linux-next-fc7c0be08448be0445c310b9a2ece48d85c08c7b.tar.gz | |
Merge tag 'arm-soc/for-4.8/soc-arm64-part2' of http://github.com/Broadcom/stblinux into next/arm64
Merge "Broadcom ARM64-based SoC changes for 4.8 second part" from Florian Fainelli:
- Eric updates the bcm2836 interrupt controller driver not to rely on ARM/Linux specific functions
in preparation for using it on ARM64
- Eric also adds a Kconfig entry for the BCM2835 Raspberry Pi family in the ARM64 Kconfig.platforms
file
- Eric cherry picked a patch from Alexander Graf with Acks from ARM64 maintainers to support different
DMA and bus offsets, required for the Raspberry Pi 3 SoC
* tag 'arm-soc/for-4.8/soc-arm64-part2' of http://github.com/Broadcom/stblinux:
arm64: Add platform selection for BCM2835.
arm64: Allow for different DMA and CPU bus offsets
irqchip: bcm2835: Avoid arch/arm-specific handle_IRQ
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm64/Kconfig.platforms | 13 | ||||
| -rw-r--r-- | arch/arm64/include/asm/dma-mapping.h | 17 |
2 files changed, 28 insertions, 2 deletions
diff --git a/arch/arm64/Kconfig.platforms b/arch/arm64/Kconfig.platforms index 59fc6d92a52a..143761dd09d1 100644 --- a/arch/arm64/Kconfig.platforms +++ b/arch/arm64/Kconfig.platforms @@ -13,6 +13,19 @@ config ARCH_ALPINE This enables support for the Annapurna Labs Alpine Soc family. +config ARCH_BCM2835 + bool "Broadcom BCM2835 family" + select ARCH_REQUIRE_GPIOLIB + select CLKSRC_OF + select PINCTRL + select PINCTRL_BCM2835 + select ARM_AMBA + select ARM_TIMER_SP804 + select HAVE_ARM_ARCH_TIMER + help + This enables support for the Broadcom BCM2837 SoC. + This SoC is used in the Raspberry Pi 3 device. + config ARCH_BCM_IPROC bool "Broadcom iProc SoC Family" select COMMON_CLK_IPROC diff --git a/arch/arm64/include/asm/dma-mapping.h b/arch/arm64/include/asm/dma-mapping.h index 7dbea6c070ec..ccea82c2b089 100644 --- a/arch/arm64/include/asm/dma-mapping.h +++ b/arch/arm64/include/asm/dma-mapping.h @@ -66,12 +66,16 @@ static inline bool is_device_dma_coherent(struct device *dev) static inline dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr) { - return (dma_addr_t)paddr; + dma_addr_t dev_addr = (dma_addr_t)paddr; + + return dev_addr - ((dma_addr_t)dev->dma_pfn_offset << PAGE_SHIFT); } static inline phys_addr_t dma_to_phys(struct device *dev, dma_addr_t dev_addr) { - return (phys_addr_t)dev_addr; + phys_addr_t paddr = (phys_addr_t)dev_addr; + + return paddr + ((phys_addr_t)dev->dma_pfn_offset << PAGE_SHIFT); } static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size) @@ -86,5 +90,14 @@ static inline void dma_mark_clean(void *addr, size_t size) { } +/* Override for dma_max_pfn() */ +static inline unsigned long dma_max_pfn(struct device *dev) +{ + dma_addr_t dma_max = (dma_addr_t)*dev->dma_mask; + + return (ulong)dma_to_phys(dev, dma_max) >> PAGE_SHIFT; +} +#define dma_max_pfn(dev) dma_max_pfn(dev) + #endif /* __KERNEL__ */ #endif /* __ASM_DMA_MAPPING_H */ |