clk: renesas: rzg2l: Add support for RZ/G3S PLL
Add support for reading the frequency of PLL1/4/6 as available on RZ/G3S. The computation formula for the PLL frequency is as follows: Fout = (nir + nfr / 4096) * Fin / (mr * pr) Signed-off-by: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com> Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be> Link: https://lore.kernel.org/r/20230929053915.1530607-8-claudiu.beznea@bp.renesas.com Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
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