diff mbox series

[1/1] pinctrl: aspeed-g6: Add NCSI pin group config

Message ID 20240613080725.2531580-1-potin.lai.pt@gmail.com (mailing list archive)
State New, archived
Headers show
Series [1/1] pinctrl: aspeed-g6: Add NCSI pin group config | expand

Commit Message

Potin Lai June 13, 2024, 8:07 a.m. UTC 
In the NCSI pin table, the reference clock output pin (RMIIXRCLKO) is not
needed on the management controller side.

To optimize pin usage, add new NCSI pin groupis that excludes RMIIXRCLKO,
reducing the number of required pins.

Signed-off-by: Potin Lai <potin.lai.pt@gmail.com>
---
 drivers/pinctrl/aspeed/pinctrl-aspeed-g6.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

Comments

Andrew Jeffery June 17, 2024, 7:33 a.m. UTC | #1 
On Thu, 2024-06-13 at 16:07 +0800, Potin Lai wrote:
> In the NCSI pin table, the reference clock output pin (RMIIXRCLKO) is not
> needed on the management controller side.
> 
> To optimize pin usage, add new NCSI pin groupis that excludes RMIIXRCLKO,
> reducing the number of required pins.

Hmm, I'm not convinced this is specific to NCSI (and it's an
unfortunate mistake on my part), but we do need to call the groups
something different than RMII[34]. Did you have any other suggestions?

> 
> Signed-off-by: Potin Lai <potin.lai.pt@gmail.com>
> ---
>  drivers/pinctrl/aspeed/pinctrl-aspeed-g6.c | 10 ++++++++--
>  1 file changed, 8 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/pinctrl/aspeed/pinctrl-aspeed-g6.c b/drivers/pinctrl/aspeed/pinctrl-aspeed-g6.c
> index 7938741136a2c..31e4e0b342a00 100644
> --- a/drivers/pinctrl/aspeed/pinctrl-aspeed-g6.c
> +++ b/drivers/pinctrl/aspeed/pinctrl-aspeed-g6.c
> @@ -249,7 +249,9 @@ PIN_DECL_2(E26, GPIOD3, RGMII3RXD3, RMII3RXER);
>  
>  FUNC_GROUP_DECL(RGMII3, H24, J22, H22, H23, G22, F22, G23, G24, F23, F26, F25,
>  		E26);
> -FUNC_GROUP_DECL(RMII3, H24, J22, H22, H23, G23, F23, F26, F25, E26);
> +GROUP_DECL(RMII3, H24, J22, H22, H23, G23, F23, F26, F25, E26);
> +GROUP_DECL(NCSI3, J22, H22, H23, G23, F23, F26, F25, E26);
> +FUNC_DECL_2(RMII3, RMII3, NCSI3);
>  
>  #define F24 28
>  SIG_EXPR_LIST_DECL_SESG(F24, NCTS3, NCTS3, SIG_DESC_SET(SCU410, 28));
> @@ -355,7 +357,9 @@ FUNC_GROUP_DECL(NRTS4, B24);
>  
>  FUNC_GROUP_DECL(RGMII4, F24, E23, E24, E25, D26, D24, C25, C26, C24, B26, B25,
>  		B24);
> -FUNC_GROUP_DECL(RMII4, F24, E23, E24, E25, C25, C24, B26, B25, B24);
> +GROUP_DECL(RMII4, F24, E23, E24, E25, C25, C24, B26, B25, B24);
> +GROUP_DECL(NCSI4, E23, E24, E25, C25, C24, B26, B25, B24);
> +FUNC_DECL_2(RMII4, RMII4, NCSI4);
>  
>  #define D22 40
>  SIG_EXPR_LIST_DECL_SESG(D22, SD1CLK, SD1, SIG_DESC_SET(SCU414, 8));
> @@ -1976,6 +1980,8 @@ static const struct aspeed_pin_group aspeed_g6_groups[] = {
>  	ASPEED_PINCTRL_GROUP(MDIO2),
>  	ASPEED_PINCTRL_GROUP(MDIO3),
>  	ASPEED_PINCTRL_GROUP(MDIO4),
> +	ASPEED_PINCTRL_GROUP(NCSI3),
> +	ASPEED_PINCTRL_GROUP(NCSI4),

You will need to update the binding document as well. I've poked Linus
W about a series I sent that re-formats the binding function and group
lists - it would be nice if you rework the patch on top of that:

https://lore.kernel.org/lkml/5bf8e1dddd2b958a102e7b1b9f9c080a34f9deff.camel@codeconstruct.com.au/

Cheers,

Andrew
Potin Lai June 19, 2024, 11:24 a.m. UTC | #2 
On Mon, Jun 17, 2024 at 3:33 PM Andrew Jeffery
<andrew@codeconstruct.com.au> wrote:
>
> On Thu, 2024-06-13 at 16:07 +0800, Potin Lai wrote:
> > In the NCSI pin table, the reference clock output pin (RMIIXRCLKO) is not
> > needed on the management controller side.
> >
> > To optimize pin usage, add new NCSI pin groupis that excludes RMIIXRCLKO,
> > reducing the number of required pins.
>
> Hmm, I'm not convinced this is specific to NCSI (and it's an
> unfortunate mistake on my part), but we do need to call the groups
> something different than RMII[34]. Did you have any other suggestions?
>
I don't have better name for now.
In ast2600 data sheet, it also mentioned "RMII" & "NCSI" together most
of the time, is it ok to use "NCSI" as a new group name?

Best regards,
Potin
> >
> > Signed-off-by: Potin Lai <potin.lai.pt@gmail.com>
> > ---
> >  drivers/pinctrl/aspeed/pinctrl-aspeed-g6.c | 10 ++++++++--
> >  1 file changed, 8 insertions(+), 2 deletions(-)
> >
> > diff --git a/drivers/pinctrl/aspeed/pinctrl-aspeed-g6.c b/drivers/pinctrl/aspeed/pinctrl-aspeed-g6.c
> > index 7938741136a2c..31e4e0b342a00 100644
> > --- a/drivers/pinctrl/aspeed/pinctrl-aspeed-g6.c
> > +++ b/drivers/pinctrl/aspeed/pinctrl-aspeed-g6.c
> > @@ -249,7 +249,9 @@ PIN_DECL_2(E26, GPIOD3, RGMII3RXD3, RMII3RXER);
> >
> >  FUNC_GROUP_DECL(RGMII3, H24, J22, H22, H23, G22, F22, G23, G24, F23, F26, F25,
> >               E26);
> > -FUNC_GROUP_DECL(RMII3, H24, J22, H22, H23, G23, F23, F26, F25, E26);
> > +GROUP_DECL(RMII3, H24, J22, H22, H23, G23, F23, F26, F25, E26);
> > +GROUP_DECL(NCSI3, J22, H22, H23, G23, F23, F26, F25, E26);
> > +FUNC_DECL_2(RMII3, RMII3, NCSI3);
> >
> >  #define F24 28
> >  SIG_EXPR_LIST_DECL_SESG(F24, NCTS3, NCTS3, SIG_DESC_SET(SCU410, 28));
> > @@ -355,7 +357,9 @@ FUNC_GROUP_DECL(NRTS4, B24);
> >
> >  FUNC_GROUP_DECL(RGMII4, F24, E23, E24, E25, D26, D24, C25, C26, C24, B26, B25,
> >               B24);
> > -FUNC_GROUP_DECL(RMII4, F24, E23, E24, E25, C25, C24, B26, B25, B24);
> > +GROUP_DECL(RMII4, F24, E23, E24, E25, C25, C24, B26, B25, B24);
> > +GROUP_DECL(NCSI4, E23, E24, E25, C25, C24, B26, B25, B24);
> > +FUNC_DECL_2(RMII4, RMII4, NCSI4);
> >
> >  #define D22 40
> >  SIG_EXPR_LIST_DECL_SESG(D22, SD1CLK, SD1, SIG_DESC_SET(SCU414, 8));
> > @@ -1976,6 +1980,8 @@ static const struct aspeed_pin_group aspeed_g6_groups[] = {
> >       ASPEED_PINCTRL_GROUP(MDIO2),
> >       ASPEED_PINCTRL_GROUP(MDIO3),
> >       ASPEED_PINCTRL_GROUP(MDIO4),
> > +     ASPEED_PINCTRL_GROUP(NCSI3),
> > +     ASPEED_PINCTRL_GROUP(NCSI4),
>
> You will need to update the binding document as well. I've poked Linus
> W about a series I sent that re-formats the binding function and group
> lists - it would be nice if you rework the patch on top of that:
>
> https://lore.kernel.org/lkml/5bf8e1dddd2b958a102e7b1b9f9c080a34f9deff.camel@codeconstruct.com.au/
>
> Cheers,
>
> Andrew
Andrew Jeffery June 19, 2024, 11:45 p.m. UTC | #3 
On Wed, 2024-06-19 at 19:24 +0800, Potin Lai wrote:
> On Mon, Jun 17, 2024 at 3:33 PM Andrew Jeffery
> <andrew@codeconstruct.com.au> wrote:
> > 
> > On Thu, 2024-06-13 at 16:07 +0800, Potin Lai wrote:
> > > In the NCSI pin table, the reference clock output pin (RMIIXRCLKO) is not
> > > needed on the management controller side.
> > > 
> > > To optimize pin usage, add new NCSI pin groupis that excludes RMIIXRCLKO,
> > > reducing the number of required pins.
> > 
> > Hmm, I'm not convinced this is specific to NCSI (and it's an
> > unfortunate mistake on my part), but we do need to call the groups
> > something different than RMII[34]. Did you have any other suggestions?
> > 
> I don't have better name for now.
> In ast2600 data sheet, it also mentioned "RMII" & "NCSI" together most
> of the time, is it ok to use "NCSI" as a new group name?

Perhaps we go with "NCSI", because the other thoughts I had are all
much less succinct.

Can you please add a note to the description in the binding that
discusses the difference between the RMII and NCSI groups?

Andrew
diff mbox series

Patch

diff --git a/drivers/pinctrl/aspeed/pinctrl-aspeed-g6.c b/drivers/pinctrl/aspeed/pinctrl-aspeed-g6.c
index 7938741136a2c..31e4e0b342a00 100644
--- a/drivers/pinctrl/aspeed/pinctrl-aspeed-g6.c
+++ b/drivers/pinctrl/aspeed/pinctrl-aspeed-g6.c
@@ -249,7 +249,9 @@  PIN_DECL_2(E26, GPIOD3, RGMII3RXD3, RMII3RXER);
 
 FUNC_GROUP_DECL(RGMII3, H24, J22, H22, H23, G22, F22, G23, G24, F23, F26, F25,
 		E26);
-FUNC_GROUP_DECL(RMII3, H24, J22, H22, H23, G23, F23, F26, F25, E26);
+GROUP_DECL(RMII3, H24, J22, H22, H23, G23, F23, F26, F25, E26);
+GROUP_DECL(NCSI3, J22, H22, H23, G23, F23, F26, F25, E26);
+FUNC_DECL_2(RMII3, RMII3, NCSI3);
 
 #define F24 28
 SIG_EXPR_LIST_DECL_SESG(F24, NCTS3, NCTS3, SIG_DESC_SET(SCU410, 28));
@@ -355,7 +357,9 @@  FUNC_GROUP_DECL(NRTS4, B24);
 
 FUNC_GROUP_DECL(RGMII4, F24, E23, E24, E25, D26, D24, C25, C26, C24, B26, B25,
 		B24);
-FUNC_GROUP_DECL(RMII4, F24, E23, E24, E25, C25, C24, B26, B25, B24);
+GROUP_DECL(RMII4, F24, E23, E24, E25, C25, C24, B26, B25, B24);
+GROUP_DECL(NCSI4, E23, E24, E25, C25, C24, B26, B25, B24);
+FUNC_DECL_2(RMII4, RMII4, NCSI4);
 
 #define D22 40
 SIG_EXPR_LIST_DECL_SESG(D22, SD1CLK, SD1, SIG_DESC_SET(SCU414, 8));
@@ -1976,6 +1980,8 @@  static const struct aspeed_pin_group aspeed_g6_groups[] = {
 	ASPEED_PINCTRL_GROUP(MDIO2),
 	ASPEED_PINCTRL_GROUP(MDIO3),
 	ASPEED_PINCTRL_GROUP(MDIO4),
+	ASPEED_PINCTRL_GROUP(NCSI3),
+	ASPEED_PINCTRL_GROUP(NCSI4),
 	ASPEED_PINCTRL_GROUP(NCTS1),
 	ASPEED_PINCTRL_GROUP(NCTS2),
 	ASPEED_PINCTRL_GROUP(NCTS3),