clk: qcom: clk-rcg: introduce support for multiple conf for same freq

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Some RCG frequency can be reached by multiple configuration.

We currently declare multiple configuration for the same frequency but
that is not supported and always the first configuration will be taken.

These multiple configuration are needed as based on the current parent
configuration, it may be needed to use a different configuration to
reach the same frequency.

To handle this introduce 3 new macro, C, FM and FMS:

- C is used to declare a freq_conf where src, pre_div, m and n are
  provided.

- FM is used to declare a freq_multi_tbl with the frequency and an
  array of confs to insert all the config for the provided frequency.

- FMS is used to declare a freq_multi_tbl with the frequency and an
  array of a single conf with the provided src, pre_div, m and n.

Struct clk_rcg2 is changed to add a union type to reference a simple
freq_tbl or a complex freq_multi_tbl.

Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
Acked-by: Stephen Boyd <sboyd@kernel.org>
Link: https://lore.kernel.org/r/20231220221724.3822-2-ansuelsmth@gmail.com
Signed-off-by: Bjorn Andersson <andersson@kernel.org>

...

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Christian Marangi 2023-12-20 23:17:22 +01:00 • committed by Bjorn Andersson

parent 3db0f3b9ff

commit d06b104364

1 changed files with 22 additions and 1 deletions

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drivers/clk/qcom/clk-rcg.h

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