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Commit fc7c0be0 authored by Arnd Bergmann's avatar Arnd Bergmann
Browse files

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
parents 623149b0 c4c0e260

arch/arm64/Kconfig.platforms

+13 −0
Original line number Diff line number Diff line
@@ -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

arch/arm64/include/asm/dma-mapping.h

+15 −2
Original line number Diff line number Diff line
@@ -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 */

drivers/irqchip/irq-bcm2835.c

+1 −2
Original line number Diff line number Diff line
@@ -52,7 +52,6 @@ 
#include <linux/irqdomain.h>



#include <asm/exception.h>

#include <asm/mach/irq.h>



/* Put the bank and irq (32 bits) into the hwirq */

#define MAKE_HWIRQ(b, n)	((b << 5) | (n))
@@ -242,7 +241,7 @@ static void __exception_irq_entry bcm2835_handle_irq( 
	u32 hwirq;



	while ((hwirq = get_next_armctrl_hwirq()) != ~0)

		handle_IRQ(irq_linear_revmap(intc.domain, hwirq), regs);

		handle_domain_irq(intc.domain, hwirq, regs);

}



static void bcm2836_chained_handle_irq(struct irq_desc *desc)

drivers/irqchip/irq-bcm2836.c

+1 −1
Original line number Diff line number Diff line
@@ -180,7 +180,7 @@ __exception_irq_entry bcm2836_arm_irqchip_handle_irq(struct pt_regs *regs) 
	} else if (stat) {

		u32 hwirq = ffs(stat) - 1;



		handle_IRQ(irq_linear_revmap(intc.domain, hwirq), regs);

		handle_domain_irq(intc.domain, hwirq, regs);

	}

}