Here is an updated version of [2] based on discussion. Series introduces support for setting up dma parameters based on device tree properties like 'dma-ranges' and 'dma-coherent' and also update to ARM 32 bit port. Earlier version of the same series is here [1]. The 'dma-ranges' helps to take care of few DMAable system memory restrictions by use of dma_pfn_offset which we maintain now per device. Arch code then uses it for dma address translations for such cases. We update the dma_pfn_offset accordingly during DT the device creation process.The 'dma-coherent' property is used to setup arch's coherent dma_ops. After some off-list discussion with RMK and Arnd, I have now dropped the controversial dma_mask setup code from the series which actually isn't blocking me as such. Considering rest of the parts of the series are already aligned, am hoping to get this version merged for 3.16 merge window. We agreed in last discussion that drivers have the ultimate responsibility to setup the correct dma mask but then we need to have some means to see if bus can support what driver has requested for a case where driver request for bigger mask than what bus supports. I can follow up on the mask topic if we have broken drivers. Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> Cc: Russell King <linux@xxxxxxxxxxxxxxxx> Cc: Arnd Bergmann <arnd@xxxxxxxx> Cc: Olof Johansson <olof@xxxxxxxxx> Cc: Grant Likely <grant.likely@xxxxxxxxxx> Cc: Rob Herring <robh+dt@xxxxxxxxxx> Cc: Catalin Marinas <catalin.marinas@xxxxxxx> Cc: Linus Walleij <linus.walleij@xxxxxxxxxx> Cc: Grygorii Strashko <grygorii.strashko@xxxxxx> Grygorii Strashko (2): of: introduce of_dma_get_range() helper ARM: dma: Use dma_pfn_offset for dma address translation Santosh Shilimkar (5): device: introduce per device dma_pfn_offset of: introduce of_dma_is_coherent() helper of: configure the platform device dma parameters ARM: dma: implement set_arch_dma_coherent_ops() ARM: mm: use phys_addr_t in __dma_page_[cpu_to_dev/dev_to_cpu] arch/arm/include/asm/dma-mapping.h | 24 +++++- arch/arm/mm/dma-mapping.c | 4 +- drivers/of/platform.c | 151 ++++++++++++++++++++++++++++++++++++ include/linux/device.h | 2 + include/linux/dma-mapping.h | 7 ++ include/linux/of_platform.h | 15 ++++ 6 files changed, 197 insertions(+), 6 deletions(-) Regards, Santosh [1] http://www.spinics.net/lists/arm-kernel/msg311678.html [2] https://lkml.org/lkml/2014/3/6/186 -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
