For applications where the PLL must be adjusted without glitches in the
clock output(s), a new silabs,pll-reset-mode property is added. It
can be used to specify whether or not the PLL should be reset after
adjustment. Resetting is known to cause glitches.
For compatibility with older device trees, it must be assumed that the
default PLL reset mode is to unconditionally reset after adjustment.
Cc: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Cc: Rabeeh Khoury <rabeeh@solid-run.com>
Cc: Jacob Siverskog <jacob@teenage.engineering>
Cc: Sergej Sawazki <sergej@taudac.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Alvin Šipraga <alsi@bang-olufsen.dk>
Link: https://lore.kernel.org/r/20231124-alvin-clk-si5351-no-pll-reset-v6-2-69b82311cb90@bang-olufsen.dk
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
The following additional properties are described:
- clock-names
- clock-frequency of the clkout child nodes
In order to suppress warnings from the DT schema validator, the clkout
child nodes are prescribed names clkout@[0-7] rather than clkout[0-7].
The example is refined as follows:
- correct the usage of property pll-master -> silabs,pll-master
- give an example of how the silabs,pll-reset property can be used
I made myself maintainer of the file as I cannot presume that anybody
else wants the responsibility.
Cc: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Cc: Rabeeh Khoury <rabeeh@solid-run.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Alvin Šipraga <alsi@bang-olufsen.dk>
Link: https://lore.kernel.org/r/20231124-alvin-clk-si5351-no-pll-reset-v6-1-69b82311cb90@bang-olufsen.dk
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
