[PATCH v2] pmdomain: imx: Make IMX8M/IMX9 BLK_CTRL tristate

[PATCH v2] pmdomain: imx: Make IMX8M/IMX9 BLK_CTRL tristate

[Zhipeng Wang]

Convert IMX8M_BLK_CTRL and IMX9_BLK_CTRL from bool to tristate
to allow building as loadable modules.

Add prompt strings to make these options visible and configurable
in menuconfig, keeping them enabled by default on appropriate platforms.

Also remove the IMX_GPCV2_PM_DOMAINS dependency from IMX9_BLK_CTRL.
This dependency was incorrect from the beginning - i.MX93 uses a
different power domain architecture compared to i.MX8M series:

- i.MX8M uses GPCv2 (General Power Controller v2) for power domain
  management, hence IMX8M_BLK_CTRL correctly depends on it.

- i.MX93 uses BLK_CTRL directly without GPCv2. The hardware doesn't
  have GPCv2 at all.

Signed-off-by: Zhipeng Wang <zhipeng.wang_1@nxp.com>
---
 drivers/pmdomain/imx/Kconfig | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/drivers/pmdomain/imx/Kconfig b/drivers/pmdomain/imx/Kconfig
index 00203615c65e..9168d183b0c5 100644
--- a/drivers/pmdomain/imx/Kconfig
+++ b/drivers/pmdomain/imx/Kconfig
@@ -10,15 +10,18 @@ config IMX_GPCV2_PM_DOMAINS
 	default y if SOC_IMX7D
 
 config IMX8M_BLK_CTRL
-	bool
-	default SOC_IMX8M && IMX_GPCV2_PM_DOMAINS
+	tristate "i.MX8M BLK CTRL driver"
+	depends on SOC_IMX8M
+	depends on IMX_GPCV2_PM_DOMAINS
 	depends on PM_GENERIC_DOMAINS
 	depends on COMMON_CLK
+	default y
 
 config IMX9_BLK_CTRL
-	bool
-	default SOC_IMX9 && IMX_GPCV2_PM_DOMAINS
+	tristate "i.MX93 BLK CTRL driver"
+	depends on SOC_IMX9
 	depends on PM_GENERIC_DOMAINS
+	default y
 
 config IMX_SCU_PD
 	bool "IMX SCU Power Domain driver"
-- 
2.34.1

Re: [PATCH v2] pmdomain: imx: Make IMX8M/IMX9 BLK_CTRL tristate

[Marco Felsch]

On 26-04-13, Zhipeng Wang wrote:
> Convert IMX8M_BLK_CTRL and IMX9_BLK_CTRL from bool to tristate
> to allow building as loadable modules.

Out of curiosity, why do you want to have a PM driver to be buildable as
module?

Regards,
  Marco

> Add prompt strings to make these options visible and configurable
> in menuconfig, keeping them enabled by default on appropriate platforms.
> 
> Also remove the IMX_GPCV2_PM_DOMAINS dependency from IMX9_BLK_CTRL.
> This dependency was incorrect from the beginning - i.MX93 uses a
> different power domain architecture compared to i.MX8M series:
> 
> - i.MX8M uses GPCv2 (General Power Controller v2) for power domain
>   management, hence IMX8M_BLK_CTRL correctly depends on it.
> 
> - i.MX93 uses BLK_CTRL directly without GPCv2. The hardware doesn't
>   have GPCv2 at all.
> 
> Signed-off-by: Zhipeng Wang <zhipeng.wang_1@nxp.com>
> ---
>  drivers/pmdomain/imx/Kconfig | 11 +++++++----
>  1 file changed, 7 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/pmdomain/imx/Kconfig b/drivers/pmdomain/imx/Kconfig
> index 00203615c65e..9168d183b0c5 100644
> --- a/drivers/pmdomain/imx/Kconfig
> +++ b/drivers/pmdomain/imx/Kconfig
> @@ -10,15 +10,18 @@ config IMX_GPCV2_PM_DOMAINS
>  	default y if SOC_IMX7D
>  
>  config IMX8M_BLK_CTRL
> -	bool
> -	default SOC_IMX8M && IMX_GPCV2_PM_DOMAINS
> +	tristate "i.MX8M BLK CTRL driver"
> +	depends on SOC_IMX8M
> +	depends on IMX_GPCV2_PM_DOMAINS
>  	depends on PM_GENERIC_DOMAINS
>  	depends on COMMON_CLK
> +	default y
>  
>  config IMX9_BLK_CTRL
> -	bool
> -	default SOC_IMX9 && IMX_GPCV2_PM_DOMAINS
> +	tristate "i.MX93 BLK CTRL driver"
> +	depends on SOC_IMX9
>  	depends on PM_GENERIC_DOMAINS
> +	default y
>  
>  config IMX_SCU_PD
>  	bool "IMX SCU Power Domain driver"
> -- 
> 2.34.1
> 
> 
> 

-- 
#gernperDu 
#CallMeByMyFirstName

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RE: [EXT] Re: [PATCH v2] pmdomain: imx: Make IMX8M/IMX9 BLK_CTRL tristate

[Zhipeng Wang]

 > On 26-04-13, Zhipeng Wang wrote:
> > Convert IMX8M_BLK_CTRL and IMX9_BLK_CTRL from bool to tristate to
> > allow building as loadable modules.
>
> Out of curiosity, why do you want to have a PM driver to be buildable as
> module?
>
> Regards,
>   Marco
>
Hi Marco,

Thank you for your question.

The primary motivation is to support Google's GKI (Generic Kernel Image)
requirement for Android devices.

GKI separates the kernel into two parts:
1. A unified kernel image (GKI) that is common across all Android devices
2. Vendor-specific drivers that must be built as loadable modules

Under the GKI architecture, SoC-specific drivers like IMX8M/IMX9 BLK_CTRL
cannot be built into the core kernel image. Instead, they must be loadable
modules that vendors can ship separately. This allows:

- A single kernel binary to support multiple hardware platforms
- Vendors to update their drivers independently without rebuilding the entire kernel
- Better compliance with Android's kernel update and security policies

For i.MX8M/i.MX9 devices running Android with GKI kernels, the BLK_CTRL
drivers need to be loaded as modules during boot. Without tristate support,
these devices cannot properly initialize their power domains, making them
non-functional under GKI.

Best regards,
Zhipeng Wang
> > Add prompt strings to make these options visible and configurable in
> > menuconfig, keeping them enabled by default on appropriate platforms.
> >
> > Also remove the IMX_GPCV2_PM_DOMAINS dependency from
> IMX9_BLK_CTRL.
> > This dependency was incorrect from the beginning - i.MX93 uses a
> > different power domain architecture compared to i.MX8M series:
> >
> > - i.MX8M uses GPCv2 (General Power Controller v2) for power domain
> >   management, hence IMX8M_BLK_CTRL correctly depends on it.
> >
> > - i.MX93 uses BLK_CTRL directly without GPCv2. The hardware doesn't
> >   have GPCv2 at all.
> >
> > Signed-off-by: Zhipeng Wang <zhipeng.wang_1@nxp.com>
> > ---
> >  drivers/pmdomain/imx/Kconfig | 11 +++++++----
> >  1 file changed, 7 insertions(+), 4 deletions(-)
> >
> > diff --git a/drivers/pmdomain/imx/Kconfig
> > b/drivers/pmdomain/imx/Kconfig index 00203615c65e..9168d183b0c5
> 100644
> > --- a/drivers/pmdomain/imx/Kconfig
> > +++ b/drivers/pmdomain/imx/Kconfig
> > @@ -10,15 +10,18 @@ config IMX_GPCV2_PM_DOMAINS
> >       default y if SOC_IMX7D
> >
> >  config IMX8M_BLK_CTRL
> > -     bool
> > -     default SOC_IMX8M && IMX_GPCV2_PM_DOMAINS
> > +     tristate "i.MX8M BLK CTRL driver"
> > +     depends on SOC_IMX8M
> > +     depends on IMX_GPCV2_PM_DOMAINS
> >       depends on PM_GENERIC_DOMAINS
> >       depends on COMMON_CLK
> > +     default y
> >
> >  config IMX9_BLK_CTRL
> > -     bool
> > -     default SOC_IMX9 && IMX_GPCV2_PM_DOMAINS
> > +     tristate "i.MX93 BLK CTRL driver"
> > +     depends on SOC_IMX9
> >       depends on PM_GENERIC_DOMAINS
> > +     default y
> >
> >  config IMX_SCU_PD
> >       bool "IMX SCU Power Domain driver"
> > --
> > 2.34.1
> >
> >
> >
>
> --
> #gernperDu
> #CallMeByMyFirstName
>
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> |

Re: [PATCH v2] pmdomain: imx: Make IMX8M/IMX9 BLK_CTRL tristate

[Frank Li]

On Mon, Apr 13, 2026 at 02:30:49PM +0900, Zhipeng Wang wrote:
> Convert IMX8M_BLK_CTRL and IMX9_BLK_CTRL from bool to tristate
> to allow building as loadable modules.
>
> Add prompt strings to make these options visible and configurable
> in menuconfig, keeping them enabled by default on appropriate platforms.
>
> Also remove the IMX_GPCV2_PM_DOMAINS dependency from IMX9_BLK_CTRL.
> This dependency was incorrect from the beginning - i.MX93 uses a

s/-/because

Reviewed-by: Frank Li <Frank.Li@nxp.com>

> different power domain architecture compared to i.MX8M series:
>
> - i.MX8M uses GPCv2 (General Power Controller v2) for power domain
>   management, hence IMX8M_BLK_CTRL correctly depends on it.
>
> - i.MX93 uses BLK_CTRL directly without GPCv2. The hardware doesn't
>   have GPCv2 at all.
>
> Signed-off-by: Zhipeng Wang <zhipeng.wang_1@nxp.com>
> ---
>  drivers/pmdomain/imx/Kconfig | 11 +++++++----
>  1 file changed, 7 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/pmdomain/imx/Kconfig b/drivers/pmdomain/imx/Kconfig
> index 00203615c65e..9168d183b0c5 100644
> --- a/drivers/pmdomain/imx/Kconfig
> +++ b/drivers/pmdomain/imx/Kconfig
> @@ -10,15 +10,18 @@ config IMX_GPCV2_PM_DOMAINS
>  	default y if SOC_IMX7D
>
>  config IMX8M_BLK_CTRL
> -	bool
> -	default SOC_IMX8M && IMX_GPCV2_PM_DOMAINS
> +	tristate "i.MX8M BLK CTRL driver"
> +	depends on SOC_IMX8M
> +	depends on IMX_GPCV2_PM_DOMAINS
>  	depends on PM_GENERIC_DOMAINS
>  	depends on COMMON_CLK
> +	default y
>
>  config IMX9_BLK_CTRL
> -	bool
> -	default SOC_IMX9 && IMX_GPCV2_PM_DOMAINS
> +	tristate "i.MX93 BLK CTRL driver"
> +	depends on SOC_IMX9
>  	depends on PM_GENERIC_DOMAINS
> +	default y
>
>  config IMX_SCU_PD
>  	bool "IMX SCU Power Domain driver"
> --
> 2.34.1
>

RE: [PATCH v2] pmdomain: imx: Make IMX8M/IMX9 BLK_CTRL tristate

[Zhipeng Wang]

> On Mon, Apr 13, 2026 at 02:30:49PM +0900, Zhipeng Wang wrote:
> > Convert IMX8M_BLK_CTRL and IMX9_BLK_CTRL from bool to tristate to
> > allow building as loadable modules.
> >
> > Add prompt strings to make these options visible and configurable in
> > menuconfig, keeping them enabled by default on appropriate platforms.
> >
> > Also remove the IMX_GPCV2_PM_DOMAINS dependency from
> IMX9_BLK_CTRL.
> > This dependency was incorrect from the beginning - i.MX93 uses a
> 
> s/-/because
> 
> Reviewed-by: Frank Li <Frank.Li@nxp.com>
> 

Hi Frank,

Thank you! v3 sent.

BRs,
Zhipeng
> > different power domain architecture compared to i.MX8M series:
> >
> > - i.MX8M uses GPCv2 (General Power Controller v2) for power domain
> >   management, hence IMX8M_BLK_CTRL correctly depends on it.
> >
> > - i.MX93 uses BLK_CTRL directly without GPCv2. The hardware doesn't
> >   have GPCv2 at all.
> >
> > Signed-off-by: Zhipeng Wang <zhipeng.wang_1@nxp.com>
> > ---
> >  drivers/pmdomain/imx/Kconfig | 11 +++++++----
> >  1 file changed, 7 insertions(+), 4 deletions(-)
> >
> > diff --git a/drivers/pmdomain/imx/Kconfig
> > b/drivers/pmdomain/imx/Kconfig index 00203615c65e..9168d183b0c5
> 100644
> > --- a/drivers/pmdomain/imx/Kconfig
> > +++ b/drivers/pmdomain/imx/Kconfig
> > @@ -10,15 +10,18 @@ config IMX_GPCV2_PM_DOMAINS
> >  	default y if SOC_IMX7D
> >
> >  config IMX8M_BLK_CTRL
> > -	bool
> > -	default SOC_IMX8M && IMX_GPCV2_PM_DOMAINS
> > +	tristate "i.MX8M BLK CTRL driver"
> > +	depends on SOC_IMX8M
> > +	depends on IMX_GPCV2_PM_DOMAINS
> >  	depends on PM_GENERIC_DOMAINS
> >  	depends on COMMON_CLK
> > +	default y
> >
> >  config IMX9_BLK_CTRL
> > -	bool
> > -	default SOC_IMX9 && IMX_GPCV2_PM_DOMAINS
> > +	tristate "i.MX93 BLK CTRL driver"
> > +	depends on SOC_IMX9
> >  	depends on PM_GENERIC_DOMAINS
> > +	default y
> >
> >  config IMX_SCU_PD
> >  	bool "IMX SCU Power Domain driver"
> > --
> > 2.34.1
> >

Re: [EXT] Re: [PATCH v2] pmdomain: imx: Make IMX8M/IMX9 BLK_CTRL tristate

[Daniel Baluta]

On 4/14/26 04:59, Zhipeng Wang wrote:
>  > On 26-04-13, Zhipeng Wang wrote:
>>> Convert IMX8M_BLK_CTRL and IMX9_BLK_CTRL from bool to tristate to
>>> allow building as loadable modules.
>> Out of curiosity, why do you want to have a PM driver to be buildable as
>> module?
>>
>> Regards,
>>   Marco
>>
> Hi Marco,
>
> Thank you for your question.
>
> The primary motivation is to support Google's GKI (Generic Kernel Image)
> requirement for Android devices.
>
> GKI separates the kernel into two parts:
> 1. A unified kernel image (GKI) that is common across all Android devices
> 2. Vendor-specific drivers that must be built as loadable modules
>
> Under the GKI architecture, SoC-specific drivers like IMX8M/IMX9 BLK_CTRL
> cannot be built into the core kernel image. Instead, they must be loadable
> modules that vendors can ship separately. This allows:
>
> - A single kernel binary to support multiple hardware platforms
> - Vendors to update their drivers independently without rebuilding the entire kernel
> - Better compliance with Android's kernel update and security policies
>
Can you please add the below line in the commit message?
> For i.MX8M/i.MX9 devices running Android with GKI kernels, the BLK_CTRL
> drivers need to be loaded as modules during boot. Without tristate support,
> these devices cannot properly initialize their power domains, making them
> non-functional under GKI.