diff mbox series

[v2,09/10] clk: renesas: r9a08g045: Add the RZG2L_PD_F_CONSOLE flag to scif0 PM domain

Message ID 20240307140728.190184-10-claudiu.beznea.uj@bp.renesas.com (mailing list archive)
State Superseded
Delegated to: Geert Uytterhoeven
Headers show
Series clk: renesas: rzg2l: Add support for power domains | expand

Commit Message

Claudiu March 7, 2024, 2:07 p.m. UTC 
From: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>

The RZG2L_PD_F_CONSOLE is used by the rzg2l-cpg driver to check if the
SCIF domain need to be powered off in suspend. This is necessary when
no_console_suspend is available in bootargs as we want to still see
output on console, thus scif0 domain should remain powered on.

Signed-off-by: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
---

Changes in v2:
- none; this patch is new

 drivers/clk/renesas/r9a08g045-cpg.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Comments

Geert Uytterhoeven March 14, 2024, 4:06 p.m. UTC | #1 
Hi Claudiu,

On Thu, Mar 7, 2024 at 3:08 PM Claudiu <claudiu.beznea@tuxon.dev> wrote:
> From: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
>
> The RZG2L_PD_F_CONSOLE is used by the rzg2l-cpg driver to check if the
> SCIF domain need to be powered off in suspend. This is necessary when
> no_console_suspend is available in bootargs as we want to still see
> output on console, thus scif0 domain should remain powered on.
>
> Signed-off-by: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>

Thanks for your patch!

> --- a/drivers/clk/renesas/r9a08g045-cpg.c
> +++ b/drivers/clk/renesas/r9a08g045-cpg.c
> @@ -293,7 +293,7 @@ static const struct rzg2l_cpg_pm_domain_init_data r9a08g045_pm_domains[] = {
>         DEF_PD("scif0",         R9A08G045_PD_SCIF0,
>                                 DEF_REG_CONF(CPG_BUS_MCPU2_MSTOP, BIT(1)),
>                                 DEF_REG_CONF(0, 0),
> -                               RZG2L_PD_F_NONE),
> +                               RZG2L_PD_F_CONSOLE),

This is not really correct: if SCIF0 is used as the console depends on the
use case, i.e. on chosen/stdout-path.
So this flag should be set at run-time. You can check the power-domains
property of the node pointed to by of_stdout to find the PM Domain that
holds the console, cfr. drivers/pmdomain/renesas/rmobile-sysc.c.

>  };
>
>  const struct rzg2l_cpg_info r9a08g045_cpg_info = {

Gr{oetje,eeting}s,

                        Geert
Claudiu March 15, 2024, 5:45 a.m. UTC | #2 
Hi, Geert,

On 14.03.2024 18:06, Geert Uytterhoeven wrote:
> Hi Claudiu,
> 
> On Thu, Mar 7, 2024 at 3:08 PM Claudiu <claudiu.beznea@tuxon.dev> wrote:
>> From: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
>>
>> The RZG2L_PD_F_CONSOLE is used by the rzg2l-cpg driver to check if the
>> SCIF domain need to be powered off in suspend. This is necessary when
>> no_console_suspend is available in bootargs as we want to still see
>> output on console, thus scif0 domain should remain powered on.
>>
>> Signed-off-by: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
> 
> Thanks for your patch!
> 
>> --- a/drivers/clk/renesas/r9a08g045-cpg.c
>> +++ b/drivers/clk/renesas/r9a08g045-cpg.c
>> @@ -293,7 +293,7 @@ static const struct rzg2l_cpg_pm_domain_init_data r9a08g045_pm_domains[] = {
>>         DEF_PD("scif0",         R9A08G045_PD_SCIF0,
>>                                 DEF_REG_CONF(CPG_BUS_MCPU2_MSTOP, BIT(1)),
>>                                 DEF_REG_CONF(0, 0),
>> -                               RZG2L_PD_F_NONE),
>> +                               RZG2L_PD_F_CONSOLE),
> 
> This is not really correct: if SCIF0 is used as the console depends on the
> use case, i.e. on chosen/stdout-path.
> So this flag should be set at run-time. You can check the power-domains
> property of the node pointed to by of_stdout to find the PM Domain that
> holds the console, cfr. drivers/pmdomain/renesas/rmobile-sysc.c.

OK, I'll double check.

Thank you,
Claudiu Beznea

> 
>>  };
>>
>>  const struct rzg2l_cpg_info r9a08g045_cpg_info = {
> 
> Gr{oetje,eeting}s,
> 
>                         Geert
>
diff mbox series

Patch

diff --git a/drivers/clk/renesas/r9a08g045-cpg.c b/drivers/clk/renesas/r9a08g045-cpg.c
index c64769082f5b..86d80f357645 100644
--- a/drivers/clk/renesas/r9a08g045-cpg.c
+++ b/drivers/clk/renesas/r9a08g045-cpg.c
@@ -293,7 +293,7 @@  static const struct rzg2l_cpg_pm_domain_init_data r9a08g045_pm_domains[] = {
 	DEF_PD("scif0",		R9A08G045_PD_SCIF0,
 				DEF_REG_CONF(CPG_BUS_MCPU2_MSTOP, BIT(1)),
 				DEF_REG_CONF(0, 0),
-				RZG2L_PD_F_NONE),
+				RZG2L_PD_F_CONSOLE),
 };
 
 const struct rzg2l_cpg_info r9a08g045_cpg_info = {