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On R-Car Gen3 systems, PSCI system suspend powers down the SoC, possibly
losing clock configuration. Hence add a notifier chain that can be used
by core clocks to save/restore clock state during system suspend/resume.
The implementation of the actual clock state save/restore operations is
clock-specific, and to be registered with the notifier chain in the SoC
or family-specific cpg_mssr_info.cpg_clk_register() callback.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Tested-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
On R-Car Gen3 SoCs with a Spread Spectrum Clock Generator (e.g. R-Car
D3), a peripheral clock divider has been added, to select between clean
and spread spectrum parents.
Add a new clock type to the R-Car Gen3 driver core to handle this.
To avoid increasing the size of struct cpg_core_clk, both parents and
dividers are stored in the existing parent resp. div fields.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Stephen Boyd <sboyd@codeaurora.org>
On some R-Car Gen3 SoCs (e.g. R-Car D3), PLL1 and PLL3 use a divider
value different from one. Extend struct rcar_gen3_cpg_pll_config to handle
this. As all multipliers and dividers are small, table size increase
can be kept limited by storing them in u8s instead of unsigned ints,
which saves ca. 0.5 KiB for a generic kernel.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Stephen Boyd <sboyd@codeaurora.org>
Pass the mode pin states from the SoC-specific CPG/MSSR driver to the
R-Car Gen3 CPG driver core, as their state will be needed to make some
core clock configuration decisions.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
All R-Car Gen3 clock drivers now obtain the values of the mode pins from
the R-Car RST driver.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Dirk Behme <dirk.behme@de.bosch.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Extract the code to support parts common to all members of the R-Car
Gen3 SoC family into a separate file, to ease sharing among SoC-specific
drivers.
Note that while the cpg_pll_configs[] arrays and the selection of the
config based on the MODE bits are identical on R-Car H3 and R-Car M3-W,
they are not common, and may be different on other R-Car Gen3 SoCs.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Tested-by: Simon Horman <horms+renesas@verge.net.au>
