bcm270x: Drop NEED_MACH_MEMORY_H and use DT dma-ranges

Drop NEED_MACH_MEMORY_H and use dma-ranges from the Device Tree to
get the bus address, like ARCH_BCM2835 does.

This means that we go from this:

arch/arm/mach-bcm270x/include/mach/memory.h:

define __virt_to_bus(x)    ((x) + (BUS_OFFSET - PAGE_OFFSET))
define __bus_to_virt(x)    ((x) - (BUS_OFFSET - PAGE_OFFSET))
define __pfn_to_bus(x)     (__pfn_to_phys(x) + BUS_OFFSET)
define __bus_to_pfn(x)     __phys_to_pfn((x) - BUS_OFFSET

To this:

arch/arm/include/asm/memory.h:

define __virt_to_bus   __virt_to_phys
define __bus_to_virt   __phys_to_virt
define __pfn_to_bus(x) __pfn_to_phys(x)
define __bus_to_pfn(x) __phys_to_pfn(x)

Drivers now have to use the DMA API to get to the bus address.

Signed-off-by: Noralf Trønnes <noralf@tronnes.org>

arch/arm/Kconfig

@@ -334,7 +334,6 @@ config ARCH_BCM2708
 	select CLKSRC_OF if OF
 	select HAVE_SCHED_CLOCK
 	select NEED_MACH_GPIO_H
-	select NEED_MACH_MEMORY_H
 	select COMMON_CLK
 	select ARCH_HAS_CPUFREQ
 	select GENERIC_CLOCKEVENTS
@@ -354,7 +353,6 @@ config ARCH_BCM2709
 	select ARM_AMBA
 	select MIGHT_HAVE_CACHE_L2X0
 	select HAVE_SCHED_CLOCK
-	select NEED_MACH_MEMORY_H
 	select COMMON_CLK
 	select ARCH_HAS_CPUFREQ
 	select GENERIC_CLOCKEVENTS

arch/arm/boot/dts/bcm2708.dtsi

@@ -7,9 +7,6 @@
 	model = "BCM2708";
 
 	soc {
-		ranges = <0x7e000000 0x20000000 0x01000000>;
-		/delete-property/ dma-ranges;
-
 		timer@7e003000 {
 			compatible = "brcm,bcm2835-system-timer";
 			reg = <0x7e003000 0x1000>;

arch/arm/boot/dts/bcm2709.dtsi

@@ -9,7 +9,6 @@
 	soc {
 		ranges = <0x7e000000 0x3f000000 0x01000000>,
 		         <0x40000000 0x40000000 0x00040000>;
-		/delete-property/ dma-ranges;
 
 		syscon@40000000 {
 			compatible = "brcm,bcm2836-arm-local", "syscon";

arch/arm/mach-bcm2708/Kconfig

@@ -3,7 +3,6 @@ menu "Broadcom BCM2708 Implementations"
 
 config MACH_BCM2708
 	bool "Broadcom BCM2708 Development Platform"
-	select NEED_MACH_MEMORY_H
 	select CPU_V6
 	select USE_OF
 	select ARCH_REQUIRE_GPIOLIB
@@ -12,11 +11,4 @@ config MACH_BCM2708
 	help
 	  Include support for the Broadcom(R) BCM2708 platform.
 
-config BCM2708_NOL2CACHE
-	bool "Videocore L2 cache disable"
-	depends on MACH_BCM2708
-        default n
-        help
-          Do not allow ARM to use GPU's L2 cache. Requires disable_l2cache in config.txt.
-
 endmenu

arch/arm/mach-bcm2709/Kconfig

@@ -6,11 +6,4 @@ config MACH_BCM2709
 	help
 	  Include support for the Broadcom(R) BCM2709 platform.
 
-config BCM2708_NOL2CACHE
-	bool "Videocore L2 cache disable"
-	depends on MACH_BCM2709
-        default y
-        help
-          Do not allow ARM to use GPU's L2 cache. Requires disable_l2cache in config.txt.
-
 endmenu