[1/5] clk: sunxi-ng: Remove duplicate ARCH_SUNXI dependencies

Commit Message

Samuel Holland Nov. 26, 2022, 7:13 p.m. UTC

SUNXI_CCU already depends on ARCH_SUNXI, so adding the dependency to
individual SoC drivers is redundant.

Signed-off-by: Samuel Holland <[e-mail]>
---

 drivers/clk/sunxi-ng/Kconfig | 43 ++++++++++++++++++------------------
 1 file changed, 21 insertions(+), 22 deletions(-)

Comments

Andre Przywara Dec. 3, 2022, 12:14 a.m. UTC | #1

On Sat, 26 Nov 2022 13:13:15 -0600
Samuel Holland <[e-mail]> wrote:

Hi,

thanks for addressing this!

> SUNXI_CCU already depends on ARCH_SUNXI, so adding the dependency to
> individual SoC drivers is redundant.
> 
> Signed-off-by: Samuel Holland <[e-mail]>
> ---
> 
>  drivers/clk/sunxi-ng/Kconfig | 43 ++++++++++++++++++------------------
>  1 file changed, 21 insertions(+), 22 deletions(-)
> 
> diff --git a/drivers/clk/sunxi-ng/Kconfig b/drivers/clk/sunxi-ng/Kconfig
> index 461537679c04..64cfa022e320 100644
> --- a/drivers/clk/sunxi-ng/Kconfig
> +++ b/drivers/clk/sunxi-ng/Kconfig
> @@ -14,43 +14,43 @@ config SUNIV_F1C100S_CCU
>  
>  config SUN20I_D1_CCU
>  	tristate "Support for the Allwinner D1 CCU"
> -	default RISCV && ARCH_SUNXI
> -	depends on (RISCV && ARCH_SUNXI) || COMPILE_TEST
> +	default RISCV
> +	depends on RISCV || COMPILE_TEST

I agree on the "depends" part: Indeed the guard symbol already covers
that, so it's redundant.
However I am not so sure about the "default" part: When ARCH_SUNXI is
deselected, but COMPILE_TEST in enabled, we default to every CCU driver
being built-in. I am not sure this is the intention, or at least
expected when doing compile testing?

>  
>  config SUN20I_D1_R_CCU
>  	tristate "Support for the Allwinner D1 PRCM CCU"
> -	default RISCV && ARCH_SUNXI
> -	depends on (RISCV && ARCH_SUNXI) || COMPILE_TEST
> +	default RISCV
> +	depends on RISCV || COMPILE_TEST
>  
>  config SUN50I_A64_CCU
>  	tristate "Support for the Allwinner A64 CCU"
> -	default ARM64 && ARCH_SUNXI
> -	depends on (ARM64 && ARCH_SUNXI) || COMPILE_TEST
> +	default ARM64
> +	depends on ARM64 || COMPILE_TEST

I wonder if this "depends" line was always wrong and should be fixed:
We can compile a 32-bit ARM kernel and run it on an A64. Granted this
requires a special bootloader or a hacked U-Boot (tried that), and
reveals some other issues with the decompressor, but technically there
is no 64-bit dependency in here.
The same goes for all the other ARM64 CCUs: Cortex-A53s can run AArch32
in all exception levels.
So shall we just completely remove the "depends" line for those, and
let SUNXI_CCU do that job? Or use use !RISCV || COMPILE_TEST?

Cheers,
Andre

>  
>  config SUN50I_A100_CCU
>  	tristate "Support for the Allwinner A100 CCU"
> -	default ARM64 && ARCH_SUNXI
> -	depends on (ARM64 && ARCH_SUNXI) || COMPILE_TEST
> +	default ARM64
> +	depends on ARM64 || COMPILE_TEST
>  
>  config SUN50I_A100_R_CCU
>  	tristate "Support for the Allwinner A100 PRCM CCU"
> -	default ARM64 && ARCH_SUNXI
> -	depends on (ARM64 && ARCH_SUNXI) || COMPILE_TEST
> +	default ARM64
> +	depends on ARM64 || COMPILE_TEST
>  
>  config SUN50I_H6_CCU
>  	tristate "Support for the Allwinner H6 CCU"
> -	default ARM64 && ARCH_SUNXI
> -	depends on (ARM64 && ARCH_SUNXI) || COMPILE_TEST
> +	default ARM64
> +	depends on ARM64 || COMPILE_TEST
>  
>  config SUN50I_H616_CCU
>  	tristate "Support for the Allwinner H616 CCU"
> -	default ARM64 && ARCH_SUNXI
> -	depends on (ARM64 && ARCH_SUNXI) || COMPILE_TEST
> +	default ARM64
> +	depends on ARM64 || COMPILE_TEST
>  
>  config SUN50I_H6_R_CCU
>  	tristate "Support for the Allwinner H6 and H616 PRCM CCU"
> -	default ARM64 && ARCH_SUNXI
> -	depends on (ARM64 && ARCH_SUNXI) || COMPILE_TEST
> +	default ARM64
> +	depends on ARM64 || COMPILE_TEST
>  
>  config SUN4I_A10_CCU
>  	tristate "Support for the Allwinner A10/A20 CCU"
> @@ -71,8 +71,7 @@ config SUN6I_A31_CCU
>  
>  config SUN6I_RTC_CCU
>  	tristate "Support for the Allwinner H616/R329 RTC CCU"
> -	default ARCH_SUNXI
> -	depends on ARCH_SUNXI || COMPILE_TEST
> +	default y
>  
>  config SUN8I_A23_CCU
>  	tristate "Support for the Allwinner A23 CCU"
> @@ -91,8 +90,8 @@ config SUN8I_A83T_CCU
>  
>  config SUN8I_H3_CCU
>  	tristate "Support for the Allwinner H3 CCU"
> -	default MACH_SUN8I || (ARM64 && ARCH_SUNXI)
> -	depends on MACH_SUN8I || (ARM64 && ARCH_SUNXI) || COMPILE_TEST
> +	default MACH_SUN8I || ARM64
> +	depends on MACH_SUN8I || ARM64 || COMPILE_TEST
>  
>  config SUN8I_V3S_CCU
>  	tristate "Support for the Allwinner V3s CCU"
> @@ -101,7 +100,7 @@ config SUN8I_V3S_CCU
>  
>  config SUN8I_DE2_CCU
>  	tristate "Support for the Allwinner SoCs DE2 CCU"
> -	default MACH_SUN8I || (ARM64 && ARCH_SUNXI)
> +	default MACH_SUN8I || ARM64
>  
>  config SUN8I_R40_CCU
>  	tristate "Support for the Allwinner R40 CCU"
> @@ -115,6 +114,6 @@ config SUN9I_A80_CCU
>  
>  config SUN8I_R_CCU
>  	tristate "Support for Allwinner SoCs' PRCM CCUs"
> -	default MACH_SUN8I || (ARCH_SUNXI && ARM64)
> +	default MACH_SUN8I || ARM64
>  
>  endif

Samuel Holland Dec. 3, 2022, 1:52 a.m. UTC | #2

On 12/2/22 18:14, Andre Przywara wrote:
> On Sat, 26 Nov 2022 13:13:15 -0600
> Samuel Holland <[e-mail]> wrote:
> 
> Hi,
> 
> thanks for addressing this!
> 
>> SUNXI_CCU already depends on ARCH_SUNXI, so adding the dependency to
>> individual SoC drivers is redundant.
>>
>> Signed-off-by: Samuel Holland <[e-mail]>
>> ---
>>
>>  drivers/clk/sunxi-ng/Kconfig | 43 ++++++++++++++++++------------------
>>  1 file changed, 21 insertions(+), 22 deletions(-)
>>
>> diff --git a/drivers/clk/sunxi-ng/Kconfig b/drivers/clk/sunxi-ng/Kconfig
>> index 461537679c04..64cfa022e320 100644
>> --- a/drivers/clk/sunxi-ng/Kconfig
>> +++ b/drivers/clk/sunxi-ng/Kconfig
>> @@ -14,43 +14,43 @@ config SUNIV_F1C100S_CCU
>>  
>>  config SUN20I_D1_CCU
>>  	tristate "Support for the Allwinner D1 CCU"
>> -	default RISCV && ARCH_SUNXI
>> -	depends on (RISCV && ARCH_SUNXI) || COMPILE_TEST
>> +	default RISCV
>> +	depends on RISCV || COMPILE_TEST
> 
> I agree on the "depends" part: Indeed the guard symbol already covers
> that, so it's redundant.
> However I am not so sure about the "default" part: When ARCH_SUNXI is
> deselected, but COMPILE_TEST in enabled, we default to every CCU driver
> being built-in. I am not sure this is the intention, or at least
> expected when doing compile testing?

SUNXI_CCU, which these depend on, is still "default ARCH_SUNXI", so if
you have ARCH_SUNXI disabled, you only get any drivers if you manually
enable SUNXI_CCU. I mentioned this in the patch 2 description, but maybe
I should move that comment here.

>>  
>>  config SUN20I_D1_R_CCU
>>  	tristate "Support for the Allwinner D1 PRCM CCU"
>> -	default RISCV && ARCH_SUNXI
>> -	depends on (RISCV && ARCH_SUNXI) || COMPILE_TEST
>> +	default RISCV
>> +	depends on RISCV || COMPILE_TEST
>>  
>>  config SUN50I_A64_CCU
>>  	tristate "Support for the Allwinner A64 CCU"
>> -	default ARM64 && ARCH_SUNXI
>> -	depends on (ARM64 && ARCH_SUNXI) || COMPILE_TEST
>> +	default ARM64
>> +	depends on ARM64 || COMPILE_TEST
> 
> I wonder if this "depends" line was always wrong and should be fixed:
> We can compile a 32-bit ARM kernel and run it on an A64. Granted this
> requires a special bootloader or a hacked U-Boot (tried that), and
> reveals some other issues with the decompressor, but technically there
> is no 64-bit dependency in here.
> The same goes for all the other ARM64 CCUs: Cortex-A53s can run AArch32
> in all exception levels.

I was trying to simplify things by hiding irrelevant options, and you
bring up an edge case of an edge case. :) I am okay with relaxing the
dependency, though I would want to leave them disabled by default for
32-bit kernels (excluding them from the change in patch 2).

> So shall we just completely remove the "depends" line for those, and
> let SUNXI_CCU do that job? Or use use !RISCV || COMPILE_TEST?

That, or we could add MACH_SUN8I to the condition. I don't have a strong
opinion.

Regards,
Samuel

Andre Przywara Dec. 3, 2022, 1:57 p.m. UTC | #3

On Fri, 2 Dec 2022 19:52:41 -0600
Samuel Holland <[e-mail]> wrote:

Hi Samuel,

> On 12/2/22 18:14, Andre Przywara wrote:
> > On Sat, 26 Nov 2022 13:13:15 -0600
> > Samuel Holland <[e-mail]> wrote:
> > 
> > Hi,
> > 
> > thanks for addressing this!
> >   
> >> SUNXI_CCU already depends on ARCH_SUNXI, so adding the dependency to
> >> individual SoC drivers is redundant.
> >>
> >> Signed-off-by: Samuel Holland <[e-mail]>
> >> ---
> >>
> >>  drivers/clk/sunxi-ng/Kconfig | 43 ++++++++++++++++++------------------
> >>  1 file changed, 21 insertions(+), 22 deletions(-)
> >>
> >> diff --git a/drivers/clk/sunxi-ng/Kconfig b/drivers/clk/sunxi-ng/Kconfig
> >> index 461537679c04..64cfa022e320 100644
> >> --- a/drivers/clk/sunxi-ng/Kconfig
> >> +++ b/drivers/clk/sunxi-ng/Kconfig
> >> @@ -14,43 +14,43 @@ config SUNIV_F1C100S_CCU
> >>  
> >>  config SUN20I_D1_CCU
> >>  	tristate "Support for the Allwinner D1 CCU"
> >> -	default RISCV && ARCH_SUNXI
> >> -	depends on (RISCV && ARCH_SUNXI) || COMPILE_TEST
> >> +	default RISCV
> >> +	depends on RISCV || COMPILE_TEST  
> > 
> > I agree on the "depends" part: Indeed the guard symbol already covers
> > that, so it's redundant.
> > However I am not so sure about the "default" part: When ARCH_SUNXI is
> > deselected, but COMPILE_TEST in enabled, we default to every CCU driver
> > being built-in. I am not sure this is the intention, or at least
> > expected when doing compile testing?  
> 
> SUNXI_CCU, which these depend on, is still "default ARCH_SUNXI", so if
> you have ARCH_SUNXI disabled, you only get any drivers if you manually
> enable SUNXI_CCU. I mentioned this in the patch 2 description, but maybe
> I should move that comment here.

Yeah, I read this later on, I guess it's fine then.

> 
> >>  
> >>  config SUN20I_D1_R_CCU
> >>  	tristate "Support for the Allwinner D1 PRCM CCU"
> >> -	default RISCV && ARCH_SUNXI
> >> -	depends on (RISCV && ARCH_SUNXI) || COMPILE_TEST
> >> +	default RISCV
> >> +	depends on RISCV || COMPILE_TEST
> >>  
> >>  config SUN50I_A64_CCU
> >>  	tristate "Support for the Allwinner A64 CCU"
> >> -	default ARM64 && ARCH_SUNXI
> >> -	depends on (ARM64 && ARCH_SUNXI) || COMPILE_TEST
> >> +	default ARM64
> >> +	depends on ARM64 || COMPILE_TEST  
> > 
> > I wonder if this "depends" line was always wrong and should be fixed:
> > We can compile a 32-bit ARM kernel and run it on an A64. Granted this
> > requires a special bootloader or a hacked U-Boot (tried that), and
> > reveals some other issues with the decompressor, but technically there
> > is no 64-bit dependency in here.
> > The same goes for all the other ARM64 CCUs: Cortex-A53s can run AArch32
> > in all exception levels.  
> 
> I was trying to simplify things by hiding irrelevant options, and you
> bring up an edge case of an edge case. :) I am okay with relaxing the
> dependency, though I would want to leave them disabled by default for
> 32-bit kernels (excluding them from the change in patch 2).

Yes, definitely, that was the idea.

And sorry for being a nuisance, but I think this "depends on ARCH_SUNXI"
here is and was always misplaced. In contrast to things like "depends
on PCI" or "depends on GPIOLIB", there is no real dependency on
ARCH_SUNXI or even ARM/RISCV here, it's more a "only useful on
ARCH_SUNXI".
And this ARM vs ARM64 was just another rationale for not being
overzealous with the dependency.

But I see that this is an orthogonal discussion to this patch, so this
should not block it. I will meditate over both patches again, since I
have the gut feeling that the end result is fine.

Cheers,
Andre

> 
> > So shall we just completely remove the "depends" line for those, and
> > let SUNXI_CCU do that job? Or use use !RISCV || COMPILE_TEST?  
> 
> That, or we could add MACH_SUN8I to the condition. I don't have a strong
> opinion.
> 
> Regards,
> Samuel
>

Jernej Škrabec Dec. 5, 2022, 8:19 p.m. UTC | #4

Dne sobota, 26. november 2022 ob 20:13:15 CET je Samuel Holland napisal(a):
> SUNXI_CCU already depends on ARCH_SUNXI, so adding the dependency to
> individual SoC drivers is redundant.
> 
> Signed-off-by: Samuel Holland <[e-mail]>

Acked-by: Jernej Skrabec <[e-mail]>

Best regards,
Jernej

Patch

diff --git a/drivers/clk/sunxi-ng/Kconfig b/drivers/clk/sunxi-ng/Kconfig
index 461537679c04..64cfa022e320 100644
--- a/drivers/clk/sunxi-ng/Kconfig
+++ b/drivers/clk/sunxi-ng/Kconfig
@@ -14,43 +14,43 @@  config SUNIV_F1C100S_CCU
 
 config SUN20I_D1_CCU
 	tristate "Support for the Allwinner D1 CCU"
-	default RISCV && ARCH_SUNXI
-	depends on (RISCV && ARCH_SUNXI) || COMPILE_TEST
+	default RISCV
+	depends on RISCV || COMPILE_TEST
 
 config SUN20I_D1_R_CCU
 	tristate "Support for the Allwinner D1 PRCM CCU"
-	default RISCV && ARCH_SUNXI
-	depends on (RISCV && ARCH_SUNXI) || COMPILE_TEST
+	default RISCV
+	depends on RISCV || COMPILE_TEST
 
 config SUN50I_A64_CCU
 	tristate "Support for the Allwinner A64 CCU"
-	default ARM64 && ARCH_SUNXI
-	depends on (ARM64 && ARCH_SUNXI) || COMPILE_TEST
+	default ARM64
+	depends on ARM64 || COMPILE_TEST
 
 config SUN50I_A100_CCU
 	tristate "Support for the Allwinner A100 CCU"
-	default ARM64 && ARCH_SUNXI
-	depends on (ARM64 && ARCH_SUNXI) || COMPILE_TEST
+	default ARM64
+	depends on ARM64 || COMPILE_TEST
 
 config SUN50I_A100_R_CCU
 	tristate "Support for the Allwinner A100 PRCM CCU"
-	default ARM64 && ARCH_SUNXI
-	depends on (ARM64 && ARCH_SUNXI) || COMPILE_TEST
+	default ARM64
+	depends on ARM64 || COMPILE_TEST
 
 config SUN50I_H6_CCU
 	tristate "Support for the Allwinner H6 CCU"
-	default ARM64 && ARCH_SUNXI
-	depends on (ARM64 && ARCH_SUNXI) || COMPILE_TEST
+	default ARM64
+	depends on ARM64 || COMPILE_TEST
 
 config SUN50I_H616_CCU
 	tristate "Support for the Allwinner H616 CCU"
-	default ARM64 && ARCH_SUNXI
-	depends on (ARM64 && ARCH_SUNXI) || COMPILE_TEST
+	default ARM64
+	depends on ARM64 || COMPILE_TEST
 
 config SUN50I_H6_R_CCU
 	tristate "Support for the Allwinner H6 and H616 PRCM CCU"
-	default ARM64 && ARCH_SUNXI
-	depends on (ARM64 && ARCH_SUNXI) || COMPILE_TEST
+	default ARM64
+	depends on ARM64 || COMPILE_TEST
 
 config SUN4I_A10_CCU
 	tristate "Support for the Allwinner A10/A20 CCU"
@@ -71,8 +71,7 @@  config SUN6I_A31_CCU
 
 config SUN6I_RTC_CCU
 	tristate "Support for the Allwinner H616/R329 RTC CCU"
-	default ARCH_SUNXI
-	depends on ARCH_SUNXI || COMPILE_TEST
+	default y
 
 config SUN8I_A23_CCU
 	tristate "Support for the Allwinner A23 CCU"
@@ -91,8 +90,8 @@  config SUN8I_A83T_CCU
 
 config SUN8I_H3_CCU
 	tristate "Support for the Allwinner H3 CCU"
-	default MACH_SUN8I || (ARM64 && ARCH_SUNXI)
-	depends on MACH_SUN8I || (ARM64 && ARCH_SUNXI) || COMPILE_TEST
+	default MACH_SUN8I || ARM64
+	depends on MACH_SUN8I || ARM64 || COMPILE_TEST
 
 config SUN8I_V3S_CCU
 	tristate "Support for the Allwinner V3s CCU"
@@ -101,7 +100,7 @@  config SUN8I_V3S_CCU
 
 config SUN8I_DE2_CCU
 	tristate "Support for the Allwinner SoCs DE2 CCU"
-	default MACH_SUN8I || (ARM64 && ARCH_SUNXI)
+	default MACH_SUN8I || ARM64
 
 config SUN8I_R40_CCU
 	tristate "Support for the Allwinner R40 CCU"
@@ -115,6 +114,6 @@  config SUN9I_A80_CCU
 
 config SUN8I_R_CCU
 	tristate "Support for Allwinner SoCs' PRCM CCUs"
-	default MACH_SUN8I || (ARCH_SUNXI && ARM64)
+	default MACH_SUN8I || ARM64
 
 endif