diff options
| author | Biju Das <biju.das.jz@bp.renesas.com> | 2024-10-24 14:42:11 +0100 |
|---|---|---|
| committer | Geert Uytterhoeven <geert+renesas@glider.be> | 2024-11-03 11:48:39 +0100 |
| commit | dabf72b85f298970e86891b5218459c17b57b26a (patch) | |
| tree | 5fd9e59f3703eb3715e76fef5c8aa079b969ee87 | |
| parent | e200b06d8ecaa70798f45f815b2cac280a7c1b20 (diff) | |
clk: renesas: rzg2l: Fix FOUTPOSTDIV clk
While computing foutpostdiv_rate, the value of params->pl5_fracin
is discarded, which results in the wrong refresh rate. Fix the formula
for computing foutpostdiv_rate.
Fixes: 1561380ee72f ("clk: renesas: rzg2l: Add FOUTPOSTDIV clk support")
Signed-off-by: Hien Huynh <hien.huynh.px@renesas.com>
Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/20241024134236.315289-1-biju.das.jz@bp.renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
| -rw-r--r-- | drivers/clk/renesas/rzg2l-cpg.c | 11 |
1 files changed, 6 insertions, 5 deletions
diff --git a/drivers/clk/renesas/rzg2l-cpg.c b/drivers/clk/renesas/rzg2l-cpg.c index 85dad87f2318..ddf722ca79eb 100644 --- a/drivers/clk/renesas/rzg2l-cpg.c +++ b/drivers/clk/renesas/rzg2l-cpg.c @@ -548,7 +548,7 @@ static unsigned long rzg2l_cpg_get_foutpostdiv_rate(struct rzg2l_pll5_param *params, unsigned long rate) { - unsigned long foutpostdiv_rate; + unsigned long foutpostdiv_rate, foutvco_rate; params->pl5_intin = rate / MEGA; params->pl5_fracin = div_u64(((u64)rate % MEGA) << 24, MEGA); @@ -557,10 +557,11 @@ rzg2l_cpg_get_foutpostdiv_rate(struct rzg2l_pll5_param *params, params->pl5_postdiv2 = 1; params->pl5_spread = 0x16; - foutpostdiv_rate = - EXTAL_FREQ_IN_MEGA_HZ * MEGA / params->pl5_refdiv * - ((((params->pl5_intin << 24) + params->pl5_fracin)) >> 24) / - (params->pl5_postdiv1 * params->pl5_postdiv2); + foutvco_rate = div_u64(mul_u32_u32(EXTAL_FREQ_IN_MEGA_HZ * MEGA, + (params->pl5_intin << 24) + params->pl5_fracin), + params->pl5_refdiv) >> 24; + foutpostdiv_rate = DIV_ROUND_CLOSEST_ULL(foutvco_rate, + params->pl5_postdiv1 * params->pl5_postdiv2); return foutpostdiv_rate; } |