[PATCH v4] drivers: soc: sunxi: Introduce SoC driver to map SRAMs

Arnd Bergmann arnd at arndb.de
Mon Jun 1 08:58:26 PDT 2015

On Monday 01 June 2015 11:04:26 Maxime Ripard wrote:
> The Allwinner SoCs have a handful of SRAM that can be either mapped to be
> accessible by devices or the CPU.
> That mapping is controlled by an SRAM controller, and that mapping might
> not be set by the bootloader, for example if the device wasn't used at all,
> or if we're using solutions like the U-Boot's Falcon Boot.
> We could also imagine changing this at runtime for example to change the
> mapping of these SRAMs to use them for suspend/resume or runtime memory
> rate change, if that ever happens.
> These use cases require some API in the kernel to control that mapping,
> exported through a drivers/soc driver.
> This driver also implement a debugfs file that shows the SRAM found in the
> system, the current mapping and the SRAM that have been claimed by some
> drivers in the kernel.
> Signed-off-by: Maxime Ripard <maxime.ripard at free-electrons.com>
> Acked-by: Arnd Bergmann <arnd at arndb.de>
> Acked-by: Hans de Goede <hdegoede at redhat.com>
> Tested-by: Hans de Goede <hdegoede at redhat.com>
> ---
> Hi Arnd, Kevin, Olof,
> Could you please apply directly this patch to your tree?
> It's the only driver related patch that should come in for this release
> cycle.

Applied to next/drivers. Thanks for your hard work to get it adapted to all
my wishes over your weekend, very much appreciated.


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