Early revisions of the R-Car V4M Series Hardware User’s Manual
contained an incorrect formula for the CPU core clocks:
ZCnφ = (PLL2VCO x 1/2) x mult/32
Dang-san fixed this by using CLK_PLL2_DIV2 instead of CLK_PLL2 as the
parent clock.
In Rev.0.70 of the documentation, the formula was corrected to:
ZCnφ = (PLL2VCO x 1/4) x mult/32
As the CPG Block Diagram now shows a separate 1/4 post-divider for PLL2,
the use of CLK_PLL2_DIV2 is a recurring source of confusion. Hence get
rid of CLK_PLL2_DIV2, and include the proper 1/4 post-divider in the
invocation of the DEF_GEN4_Z() macro, like is done on other R-Car Gen4
(and Gen3) SoCs.
Ported from Linux commit
92850bed9d4d ("clk: renesas: r8a779h0: Drop CLK_PLL2_DIV2 to clarify ZCn clocks")
Reported-by: Vinh Nguyen <vinh.nguyen.xz@renesas.com>
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/0d2789cac2bf306145fe0bbf269c2da5942bb68f.1728377724.git.geert+renesas@glider.be
Signed-off-by: Marek Vasut <marek.vasut+renesas@mailbox.org>
Add PLL7 support to Gen3/Gen4 common clock driver. Add initial PLL7
multiplier and divider values into table in R8A779H0 V4M clock driver.
The PLL7 is new PLL added in R8A779H0 V4M SoC. Only integer multiplication
mode is supported by PLL7. The PLL reference clock are either 16.66 MHz or
20 MHz on R8A779H0 V4M SoC, and the output frequency must be 2000 MHz. The
multiplier values fitting this requirement are calculated to 120 or 100.
Signed-off-by: Marek Vasut <marek.vasut+renesas@mailbox.org>
