soc: starfive: Add socinfo driver for JHB100 SoC

Add a socinfo driver for the JHB100 SoC, exposing the SoC family, ID and
revision through the SoC bus. It is currently used to distinguish the two
re

soc: starfive: Add socinfo driver for JHB100 SoC

Add a socinfo driver for the JHB100 SoC, exposing the SoC family, ID and
revision through the SoC bus. It is currently used to distinguish the two
revisions, A0 and A1.

The driver binds to the sys0 system controller node. That region only
contains the PLL controls, this revision ID register and a few debug
registers, so rather than describing an extra child node in the
devicetree, the sys0 PLL device is instantiated from here as an MFD cell.
The PLL driver then picks up the regmap from its parent's DT node.

Note that CONFIG_STARFIVE_JHB100_SOCINFO is therefore a build-time
prerequisite for the sys0 PLL clocks; see CLK_STARFIVE_JHB100_PLL.

Signed-off-by: Changhuang Liang <changhuang.liang@starfivetech.com>
Signed-off-by: Conor Dooley <conor.dooley@microchip.com>

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

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

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

To simplify with maintenance let's move the starfive 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: Walker Chen <walker.chen@starfivetech.com>
Cc: Conor Dooley <conor@kernel.org>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

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soc: starfive: Add StarFive JH71XX pmu driver

Add pmu driver for the StarFive JH71XX SoC.

As the power domains provider, the Power Management Unit (PMU) is
designed for including multiple PM domain

soc: starfive: Add StarFive JH71XX pmu driver

Add pmu driver for the StarFive JH71XX SoC.

As the power domains provider, the Power Management Unit (PMU) is
designed for including multiple PM domains that can be used for power
gating of selected IP blocks for power saving by reduced leakage
current. It accepts software encourage command to switch the power mode
of SoC.

Signed-off-by: Walker Chen <walker.chen@starfivetech.com>
Reviewed-by: Conor Dooley <conor.dooley@microchip.com>
Reviewed-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Conor Dooley <conor.dooley@microchip.com>

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