On Thu, Oct 29, 2020 at 12:26 PM Nicolas Saenz Julienne
[off-list ref] wrote:

Introduce of_dma_get_max_cpu_address(), which provides the highest CPU
physical address addressable by all DMA masters in the system. It's
specially useful for setting memory zones sizes at early boot time.

Signed-off-by: Nicolas Saenz Julienne <redacted>

---

Changes since v4:
 - Return max address, not address limit (one-off difference)

Changes since v3:
 - use u64 with cpu_end

Changes since v2:
 - Use PHYS_ADDR_MAX
 - return phys_dma_t
 - Rename function
 - Correct subject
 - Add support to start parsing from an arbitrary device node in order
   for the function to work with unit tests

 drivers/of/address.c | 42 ++++++++++++++++++++++++++++++++++++++++++
 include/linux/of.h   |  7 +++++++
 2 files changed, 49 insertions(+)

Reviewed-by: Rob Herring <robh@kernel.org>

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