diff mbox series

[v5,11/11] clk: sunxi-ng: nkm: Prefer current parent rate

Message ID 20230806-pll-mipi_set_rate_parent-v5-11-db4f5ca33fc3@oltmanns.dev
State New
Headers
Series clk: sunxi-ng: Consider alternative parent rates when determining NKM clock rate |

Commit Message

Frank Oltmanns Aug. 6, 2023, 1:06 p.m. UTC 
  Similar to ccu_mp, if the current parent rate allows getting the ideal
rate, prefer to not change the parent clock's rate.

Signed-off-by: Frank Oltmanns <frank@oltmanns.dev>
---
 drivers/clk/sunxi-ng/ccu_nkm.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

Comments

Jernej Škrabec Aug. 6, 2023, 1:43 p.m. UTC | #1 
Dne nedelja, 06. avgust 2023 ob 15:06:56 CEST je Frank Oltmanns napisal(a):
> Similar to ccu_mp, if the current parent rate allows getting the ideal
> rate, prefer to not change the parent clock's rate.
> 
> Signed-off-by: Frank Oltmanns <frank@oltmanns.dev>

Reviewed-by: Jernej Skrabec <jernej.skrabec@gmail.com>

Best regards,
Jernej

> ---
>  drivers/clk/sunxi-ng/ccu_nkm.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/clk/sunxi-ng/ccu_nkm.c b/drivers/clk/sunxi-ng/ccu_nkm.c
> index 896bb1ef8642..1e49444817cf 100644
> --- a/drivers/clk/sunxi-ng/ccu_nkm.c
> +++ b/drivers/clk/sunxi-ng/ccu_nkm.c
> @@ -35,7 +35,8 @@ static unsigned long
> ccu_nkm_find_best_with_parent_adj(struct ccu_common *common
> 
>  				tmp_rate = tmp_parent * _n * _k / 
_m;
> 
> -				if (ccu_is_better_rate(common, 
rate, tmp_rate, best_rate)) {
> +				if (ccu_is_better_rate(common, 
rate, tmp_rate, best_rate) ||
> +				    (tmp_parent == *parent && 
tmp_rate == best_rate)) {
>  					best_rate = tmp_rate;
>  					best_parent_rate = 
tmp_parent;
>  					best_n = _n;
diff mbox series

Patch

diff --git a/drivers/clk/sunxi-ng/ccu_nkm.c b/drivers/clk/sunxi-ng/ccu_nkm.c
index 896bb1ef8642..1e49444817cf 100644
--- a/drivers/clk/sunxi-ng/ccu_nkm.c
+++ b/drivers/clk/sunxi-ng/ccu_nkm.c
@@ -35,7 +35,8 @@  static unsigned long ccu_nkm_find_best_with_parent_adj(struct ccu_common *common
 
 				tmp_rate = tmp_parent * _n * _k / _m;
 
-				if (ccu_is_better_rate(common, rate, tmp_rate, best_rate)) {
+				if (ccu_is_better_rate(common, rate, tmp_rate, best_rate) ||
+				    (tmp_parent == *parent && tmp_rate == best_rate)) {
 					best_rate = tmp_rate;
 					best_parent_rate = tmp_parent;
 					best_n = _n;