clk: renesas: rzg2l: Fix FOUTPOSTDIV clk
[ Upstream commit dabf72b85f298970e86891b5218459c17b57b26a ]
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: 1561380ee7
("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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
parent
9bc7ccfbd3
commit
1b67ca853a
@ -289,7 +289,7 @@ static unsigned long
|
|||||||
rzg2l_cpg_get_foutpostdiv_rate(struct rzg2l_pll5_param *params,
|
rzg2l_cpg_get_foutpostdiv_rate(struct rzg2l_pll5_param *params,
|
||||||
unsigned long rate)
|
unsigned long rate)
|
||||||
{
|
{
|
||||||
unsigned long foutpostdiv_rate;
|
unsigned long foutpostdiv_rate, foutvco_rate;
|
||||||
|
|
||||||
params->pl5_intin = rate / MEGA;
|
params->pl5_intin = rate / MEGA;
|
||||||
params->pl5_fracin = div_u64(((u64)rate % MEGA) << 24, MEGA);
|
params->pl5_fracin = div_u64(((u64)rate % MEGA) << 24, MEGA);
|
||||||
@ -298,10 +298,11 @@ rzg2l_cpg_get_foutpostdiv_rate(struct rzg2l_pll5_param *params,
|
|||||||
params->pl5_postdiv2 = 1;
|
params->pl5_postdiv2 = 1;
|
||||||
params->pl5_spread = 0x16;
|
params->pl5_spread = 0x16;
|
||||||
|
|
||||||
foutpostdiv_rate =
|
foutvco_rate = div_u64(mul_u32_u32(EXTAL_FREQ_IN_MEGA_HZ * MEGA,
|
||||||
EXTAL_FREQ_IN_MEGA_HZ * MEGA / params->pl5_refdiv *
|
(params->pl5_intin << 24) + params->pl5_fracin),
|
||||||
((((params->pl5_intin << 24) + params->pl5_fracin)) >> 24) /
|
params->pl5_refdiv) >> 24;
|
||||||
(params->pl5_postdiv1 * params->pl5_postdiv2);
|
foutpostdiv_rate = DIV_ROUND_CLOSEST_ULL(foutvco_rate,
|
||||||
|
params->pl5_postdiv1 * params->pl5_postdiv2);
|
||||||
|
|
||||||
return foutpostdiv_rate;
|
return foutpostdiv_rate;
|
||||||
}
|
}
|
||||||
|
Loading…
Reference in New Issue
Block a user