clk: sunxi-ng: h616: Add PLL derived 32KHz clock

The RTC section of the H616 manual mentions in a half-sentence the
existence of a clock "32K divided by PLL_PERI(2X)". This is used as
one of the pos

clk: sunxi-ng: h616: Add PLL derived 32KHz clock

The RTC section of the H616 manual mentions in a half-sentence the
existence of a clock "32K divided by PLL_PERI(2X)". This is used as
one of the possible inputs for the mux that selects the clock for the
32 KHz fanout pad. On the H616 this is routed to pin PG10, and some
boards use that clock output to compensate for a missing 32KHz crystal.
On the OrangePi Zero2 this is for instance connected to the LPO pin of
the WiFi/BT chip.
The new RTC clock binding requires this clock to be named as one input
clock, so we need to expose this to the DT. In contrast to the D1 SoC
there does not seem to be a gate for this clock, so just use a fixed
divider clock, using a newly assigned clock number.

Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Reviewed-by: Samuel Holland <samuel@sholland.org>
Signed-off-by: Jernej Skrabec <jernej.skrabec@gmail.com>
Link: https://lore.kernel.org/r/20220428230933.15262-3-andre.przywara@arm.com

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clk: sunxi-ng: Convert early providers to platform drivers

The PRCM CCU drivers depend on clocks provided by other CCU drivers. For
example, the sun8i-r-ccu driver uses the "pll-periph" clock provid

clk: sunxi-ng: Convert early providers to platform drivers

The PRCM CCU drivers depend on clocks provided by other CCU drivers. For
example, the sun8i-r-ccu driver uses the "pll-periph" clock provided by
the SoC's main CCU.

However, sun8i-r-ccu is an early OF clock provider, and many of the
main CCUs (e.g. sun50i-a64-ccu) use platform drivers. This means that
the consumer clocks will be orphaned until the supplier driver is bound.
This can be avoided by converting the remaining CCUs to use platform
drivers. Then fw_devlink will ensure the drivers are bound in the
optimal order.

The sun5i CCU is the only one which actually needs to be an early clock
provider, because it provides the clock for the system timer. That one
is left alone.

Signed-off-by: Samuel Holland <samuel@sholland.org>
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Link: https://lore.kernel.org/r/20211119033338.25486-4-samuel@sholland.org

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clk: sunxi-ng: Unregister clocks/resets when unbinding

Currently, unbinding a CCU driver unmaps the device's MMIO region, while
leaving its clocks/resets and their providers registered. This can cau

clk: sunxi-ng: Unregister clocks/resets when unbinding

Currently, unbinding a CCU driver unmaps the device's MMIO region, while
leaving its clocks/resets and their providers registered. This can cause
a page fault later when some clock operation tries to perform MMIO. Fix
this by separating the CCU initialization from the memory allocation,
and then using a devres callback to unregister the clocks and resets.

This also fixes a memory leak of the `struct ccu_reset`, and uses the
correct owner (the specific platform driver) for the clocks and resets.

Early OF clock providers are never unregistered, and limited error
handling is possible, so they are mostly unchanged. The error reporting
is made more consistent by moving the message inside of_sunxi_ccu_probe.

Signed-off-by: Samuel Holland <samuel@sholland.org>
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Link: https://lore.kernel.org/r/20210901050526.45673-2-samuel@sholland.org

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clk: sunxi-ng: Unregister clocks/resets when unbinding

[ Upstream commit 9bec2b9c6134052994115d2d3374e96f2ccb9b9d ]

Currently, unbinding a CCU driver unmaps the device's MMIO region, while
leaving

clk: sunxi-ng: Unregister clocks/resets when unbinding

[ Upstream commit 9bec2b9c6134052994115d2d3374e96f2ccb9b9d ]

Currently, unbinding a CCU driver unmaps the device's MMIO region, while
leaving its clocks/resets and their providers registered. This can cause
a page fault later when some clock operation tries to perform MMIO. Fix
this by separating the CCU initialization from the memory allocation,
and then using a devres callback to unregister the clocks and resets.

This also fixes a memory leak of the `struct ccu_reset`, and uses the
correct owner (the specific platform driver) for the clocks and resets.

Early OF clock providers are never unregistered, and limited error
handling is possible, so they are mostly unchanged. The error reporting
is made more consistent by moving the message inside of_sunxi_ccu_probe.

Signed-off-by: Samuel Holland <samuel@sholland.org>
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Link: https://lore.kernel.org/r/20210901050526.45673-2-samuel@sholland.org
Signed-off-by: Sasha Levin <sashal@kernel.org>

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clk: sunxi-ng: Add support for the Allwinner H616 CCU

While the clocks are fairly similar to the H6, many differ in tiny
details, so a separate clock driver seems indicated.

Derived from the H6 clo

clk: sunxi-ng: Add support for the Allwinner H616 CCU

While the clocks are fairly similar to the H6, many differ in tiny
details, so a separate clock driver seems indicated.

Derived from the H6 clock driver, and adjusted according to the manual.

Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Acked-by: Maxime Ripard <mripard@kernel.org>
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Link: https://lore.kernel.org/r/20210127172500.13356-4-andre.przywara@arm.com

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