soc: sunxi: Move power-domain driver to the genpd dir

To simplify with maintenance let's move the sunxi power-domain driver to
the new genpd directory. Going forward, patches are intended to be mana

soc: sunxi: Move power-domain driver to the genpd dir

To simplify with maintenance let's move the sunxi power-domain driver to
the new genpd directory. Going forward, patches are intended to be managed
through a separate git tree, according to MAINTAINERS.

Cc: Chen-Yu Tsai <[email protected]>
Cc: Jernej Skrabec <[email protected]>
Cc: Samuel Holland <[email protected]>
Cc: <[email protected]>
Acked-by: Jernej Skrabec <[email protected]>
Signed-off-by: Ulf Hansson <[email protected]>

show more ...

soc: sunxi: Add Allwinner D1 PPU driver

The PPU contains a series of identical MMIO register ranges, one for
each power domain. Each range contains control/status bits for a clock
gate, reset line,

soc: sunxi: Add Allwinner D1 PPU driver

The PPU contains a series of identical MMIO register ranges, one for
each power domain. Each range contains control/status bits for a clock
gate, reset line, output gates, and a power switch. (The clock and reset
are separate from, and in addition to, the bits in the CCU.) It also
contains a hardware power sequence engine to control the other bits.

Acked-by: Jernej Skrabec <[email protected]>
Signed-off-by: Samuel Holland <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Jernej Skrabec <[email protected]>

show more ...

soc: sunxi: Deal with the MBUS DMA offsets in a central place

So far most of the drivers with the MBUS quirks had to duplicate the
code to deal with DT compatibility and enforcing the DMA offsets.

soc: sunxi: Deal with the MBUS DMA offsets in a central place

So far most of the drivers with the MBUS quirks had to duplicate the
code to deal with DT compatibility and enforcing the DMA offsets.

Let's move for a more maintainable solution by putting everything in a
notifier that would take care of setting up the DMA offsets for all the
MBUS devices.

Suggested-by: Robin Murphy <[email protected]>
Signed-off-by: Maxime Ripard <[email protected]>
Reviewed-by: Chen-Yu Tsai <[email protected]>
Reviewed-by: Christoph Hellwig <[email protected]>
Acked-by: Daniel Vetter <[email protected]>

show more ...

treewide: Add SPDX license identifier - Makefile/Kconfig

Add SPDX license identifiers to all Make/Kconfig files which:

- Have no license information of any form

These files fall under the project

treewide: Add SPDX license identifier - Makefile/Kconfig

Add SPDX license identifiers to all Make/Kconfig files which:

- Have no license information of any form

These files fall under the project license, GPL v2 only. The resulting SPDX
license identifier is:

GPL-2.0-only

Signed-off-by: Thomas Gleixner <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>

show more ...

drivers: soc: sunxi: Introduce SoC driver to map SRAMs

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 S

drivers: soc: sunxi: Introduce SoC driver to map SRAMs

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 <[email protected]>
Acked-by: Arnd Bergmann <[email protected]>
Acked-by: Hans de Goede <[email protected]>
Tested-by: Hans de Goede <[email protected]>
Signed-off-by: Arnd Bergmann <[email protected]>

show more ...