linux-kernel - Re: [PATCH v6 06/10] pwm: dwc: split pci out of core driver

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Date:   Thu, 10 Nov 2022 16:29:27 +0100
From:   Uwe Kleine-König <u.kleine-koenig@...gutronix.de>
To:     Ben Dooks <ben.dooks@...ive.com>
Cc:     linux-pwm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, Lee Jones <lee.jones@...aro.org>,
        Thierry Reding <thierry.reding@...il.com>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Greentime Hu <greentime.hu@...ive.com>,
        jarkko.nikula@...ux.intel.com,
        William Salmon <william.salmon@...ive.com>,
        Jude Onyenegecha <jude.onyenegecha@...ive.com>
Subject: Re: [PATCH v6 06/10] pwm: dwc: split pci out of core driver

On Thu, Oct 20, 2022 at 04:16:06PM +0100, Ben Dooks wrote:
> Moving towards adding non-pci support for the driver, move the pci
> parts out of the core into their own module. This is partly due to
> the module_driver() code only being allowed once in a module and also
> to avoid a number of #ifdef if we build a single file in a system
> without pci support.
> 
> Signed-off-by: Ben Dooks <ben.dooks@...ive.com>
> ---
> v6:
>  - put DWC_PERIOD_NS back to avoid bisect issues
> v4:
>  - removed DWC_PERIOD_NS as not needed
> ---
>  drivers/pwm/Kconfig       |  14 +++-
>  drivers/pwm/Makefile      |   1 +
>  drivers/pwm/pwm-dwc-pci.c | 133 ++++++++++++++++++++++++++++++++
>  drivers/pwm/pwm-dwc.c     | 158 +-------------------------------------
>  drivers/pwm/pwm-dwc.h     |  58 ++++++++++++++
>  5 files changed, 207 insertions(+), 157 deletions(-)
>  create mode 100644 drivers/pwm/pwm-dwc-pci.c
>  create mode 100644 drivers/pwm/pwm-dwc.h
> 
> diff --git a/drivers/pwm/Kconfig b/drivers/pwm/Kconfig
> index 3f3c53af4a56..a9f1c554db2b 100644
> --- a/drivers/pwm/Kconfig
> +++ b/drivers/pwm/Kconfig
> @@ -175,15 +175,23 @@ config PWM_CROS_EC
>  	  Controller.
>  
>  config PWM_DWC
> -	tristate "DesignWare PWM Controller"
> -	depends on PCI || COMPILE_TEST
> +	tristate "DesignWare PWM Controller core"
>  	depends on HAS_IOMEM
>  	help
> -	  PWM driver for Synopsys DWC PWM Controller attached to a PCI bus.
> +	  PWM driver for Synopsys DWC PWM Controller.

Currently pwm-dwc doesn't contain a driver but is only a library used by
pwm-dwc-pci (and later the of driver). As such it doesn't make sense to
be user-selectible, does it?

Best regards
Uwe

-- 
Pengutronix e.K.                           | Uwe Kleine-König            |
Industrial Linux Solutions                 | https://www.pengutronix.de/ |

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