Re: [PATCH] mailbox, remoteproc: omap2+: fix compile testing

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On Mon, 2024-09-09 at 20:38 +0000, Arnd Bergmann wrote:
> From: Arnd Bergmann <arnd@xxxxxxxx>
> 
> Selecting CONFIG_OMAP2PLUS_MBOX while compile testing
> causes a build failure:
> 
> WARNING: unmet direct dependencies detected for OMAP2PLUS_MBOX
>   Depends on [n]: MAILBOX [=y] && (ARCH_OMAP2PLUS || ARCH_K3)
>   Selected by [m]:
>   - TI_K3_M4_REMOTEPROC [=m] && REMOTEPROC [=y] && (ARCH_K3 ||
> COMPILE_TEST [=y])
> 
> Using 'select' to force-enable another subsystem is generally
> a mistake and causes problems such as this one, so change the
> three drivers that link against this driver to use 'depends on'
> instead, and ensure the driver itself can be compile tested
> regardless of the platform.
> 
> When compile-testing without CONFIG_TI_SCI_PROTOCOL=m, there
> is a chance for a link failure, so add a careful dependency
> on that.
> 
> arm-linux-gnueabi-ld: drivers/remoteproc/ti_k3_m4_remoteproc.o: in
> function `k3_m4_rproc_probe':
> ti_k3_m4_remoteproc.c:(.text.k3_m4_rproc_probe+0x76): undefined
> reference to `devm_ti_sci_get_by_phandle'
> 
> Fixes: ebcf9008a895 ("remoteproc: k3-m4: Add a remoteproc driver for
> M4F subsystem")
> Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
> ---
>  drivers/mailbox/Kconfig        |  2 +-
>  drivers/mailbox/omap-mailbox.c |  2 +-
>  drivers/remoteproc/Kconfig     | 10 ++++------
>  3 files changed, 6 insertions(+), 8 deletions(-)
> 

Looks good to me:

Reviewed-by: Martyn Welch <martyn.welch@xxxxxxxxxxxxx>

> diff --git a/drivers/mailbox/Kconfig b/drivers/mailbox/Kconfig
> index 4eed97295927..ecaf78beb934 100644
> --- a/drivers/mailbox/Kconfig
> +++ b/drivers/mailbox/Kconfig
> @@ -73,7 +73,7 @@ config ARMADA_37XX_RWTM_MBOX
>  
>  config OMAP2PLUS_MBOX
>  	tristate "OMAP2+ Mailbox framework support"
> -	depends on ARCH_OMAP2PLUS || ARCH_K3
> +	depends on ARCH_OMAP2PLUS || ARCH_K3 || COMPILE_TEST
>  	help
>  	  Mailbox implementation for OMAP family chips with hardware
> for
>  	  interprocessor communication involving DSP, IVA1.0 and
> IVA2 in
> diff --git a/drivers/mailbox/omap-mailbox.c b/drivers/mailbox/omap-
> mailbox.c
> index 7a87424657a1..6797770474a5 100644
> --- a/drivers/mailbox/omap-mailbox.c
> +++ b/drivers/mailbox/omap-mailbox.c
> @@ -603,7 +603,7 @@ static struct platform_driver omap_mbox_driver =
> {
>  	.driver	= {
>  		.name = "omap-mailbox",
>  		.pm = &omap_mbox_pm_ops,
> -		.of_match_table =
> of_match_ptr(omap_mailbox_of_match),
> +		.of_match_table = omap_mailbox_of_match,
>  	},
>  };
>  module_platform_driver(omap_mbox_driver);
> diff --git a/drivers/remoteproc/Kconfig b/drivers/remoteproc/Kconfig
> index 0f0862e20a93..62f8548fb46a 100644
> --- a/drivers/remoteproc/Kconfig
> +++ b/drivers/remoteproc/Kconfig
> @@ -330,8 +330,7 @@ config STM32_RPROC
>  config TI_K3_DSP_REMOTEPROC
>  	tristate "TI K3 DSP remoteproc support"
>  	depends on ARCH_K3
> -	select MAILBOX
> -	select OMAP2PLUS_MBOX
> +	depends on OMAP2PLUS_MBOX
>  	help
>  	  Say m here to support TI's C66x and C71x DSP remote
> processor
>  	  subsystems on various TI K3 family of SoCs through the
> remote
> @@ -343,8 +342,8 @@ config TI_K3_DSP_REMOTEPROC
>  config TI_K3_M4_REMOTEPROC
>  	tristate "TI K3 M4 remoteproc support"
>  	depends on ARCH_K3 || COMPILE_TEST
> -	select MAILBOX
> -	select OMAP2PLUS_MBOX
> +	depends on TI_SCI_PROTOCOL || (COMPILE_TEST &&
> TI_SCI_PROTOCOL=n)
> +	depends on OMAP2PLUS_MBOX
>  	help
>  	  Say m here to support TI's M4 remote processor subsystems
>  	  on various TI K3 family of SoCs through the remote
> processor
> @@ -356,8 +355,7 @@ config TI_K3_M4_REMOTEPROC
>  config TI_K3_R5_REMOTEPROC
>  	tristate "TI K3 R5 remoteproc support"
>  	depends on ARCH_K3
> -	select MAILBOX
> -	select OMAP2PLUS_MBOX
> +	depends on OMAP2PLUS_MBOX
>  	help
>  	  Say m here to support TI's R5F remote processor subsystems
>  	  on various TI K3 family of SoCs through the remote
> processor






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