linux-kernel - Re: [PATCH] pinctrl: Add kernel config PINCTRL_MTK

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Date:   Thu, 11 Apr 2019 15:04:05 -0700
From:   Sean Wang <sean.wang@...nel.org>
To:     Light Hsieh <light.hsieh@...iatek.com>
Cc:     Linus Walleij <linus.walleij@...aro.org>,
        linux-mediatek@...ts.infradead.org, linux-gpio@...r.kernel.org,
        linux-kernel@...r.kernel.org, wsd_upstream@...iatek.com
Subject: Re: [PATCH] pinctrl: Add kernel config PINCTRL_MTK_V2

Hi, Light

On Thu, Apr 11, 2019 at 2:32 AM Light Hsieh <light.hsieh@...iatek.com> wrote:
>
> Since no single Mediatek chip use code for PINCTRL_MTK and code for
> PINCTRL_MTK_MOORE/PINCTRL_MTK_PARIS simultaneously, it is better to use
> different config to determine if related code will be built or not on
> building non-generic kernel.
>
> Add kernel config PINCTRL_MTK_V2 selected by either PINCTRL_MTK_MOORE
> or PINCTRL_MTK_PARIS.
> Use PINCTRL_MTK and PINCTRL_MTK_V2 to control building of
> drivers/pinctrl/medaitek/.
> Remove selection of EINT_MTK from PINCTRL_MTK since code for EINT_MTK is
> only related to PINCTRL_MTK_MOORE/PINCTRL_MTK_PARIS, i.e. PINCTL_MTK_V2.
>

PINCTRL_MTK also depends on EINT_MTK such as the symbol
mtk_eint_do_init, it is a common library for the two kinds of the
pinctrl core.

> ---
>  drivers/pinctrl/Makefile         |  3 ++-
>  drivers/pinctrl/mediatek/Kconfig | 15 ++++++++++++---
>  2 files changed, 14 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/pinctrl/Makefile b/drivers/pinctrl/Makefile
> index 712184b..fcee0e0 100644
> --- a/drivers/pinctrl/Makefile
> +++ b/drivers/pinctrl/Makefile
> @@ -65,6 +65,7 @@ obj-$(CONFIG_PINCTRL_SUNXI)   += sunxi/
>  obj-y                          += ti/
>  obj-$(CONFIG_PINCTRL_UNIPHIER) += uniphier/
>  obj-$(CONFIG_ARCH_VT8500)      += vt8500/
> -obj-y                          += mediatek/
> +obj-$(CONFIG_PINCTRL_MTK)      += mediatek/
> +obj-$(CONFIG_PINCTRL_MTK_V2)   += mediatek/

I would think it is good if deciding V1 or not should be done inside
the vendor directory and the change also would cause COMPILE_TEST not
be applied to

>  obj-$(CONFIG_PINCTRL_ZX)       += zte/
>  obj-y                          += cirrus/
> diff --git a/drivers/pinctrl/mediatek/Kconfig b/drivers/pinctrl/mediatek/Kconfig
> index a005cbc..5e26462 100644
> --- a/drivers/pinctrl/mediatek/Kconfig
> +++ b/drivers/pinctrl/mediatek/Kconfig
> @@ -2,10 +2,15 @@ menu "MediaTek pinctrl drivers"
>         depends on ARCH_MEDIATEK || COMPILE_TEST
>
>  config EINT_MTK
> -       bool "MediaTek External Interrupt Support"
> -       depends on PINCTRL_MTK || PINCTRL_MTK_MOORE || PINCTRL_MTK_PARIS || COMPILE_TEST
> +       bool "MediaTek External Interrupt driver that is based on PINCTRL_MTK_V2"
> +       depends on PINCTRL_MTK_MOORE || PINCTRL_MTK_PARIS || COMPILE_TEST
>         select GPIOLIB
>         select IRQ_DOMAIN
> +       help
> +         Say yes here to enable support for MediaTek External Interrupt
> +         (EINT) driver based on PINCTRL_MTK version 2.
> +         This driver is combined with MediaTek Pinctrl driver version 2
> +         so PINCTRL_MTK_V2 shall be set first.
>
>  config PINCTRL_MTK
>         bool
> @@ -13,9 +18,11 @@ config PINCTRL_MTK
>         select PINMUX
>         select GENERIC_PINCONF
>         select GPIOLIB
> -       select EINT_MTK
>         select OF_GPIO
>
> +config PINCTRL_MTK_V2
> +       bool "MediaTek Pinctrl Support V2"
> +
>  config PINCTRL_MTK_MOORE
>         bool
>         depends on OF
> @@ -24,6 +31,7 @@ config PINCTRL_MTK_MOORE
>         select GENERIC_PINMUX_FUNCTIONS
>         select GPIOLIB
>         select OF_GPIO
> +       select PINCTRL_MTK_V2
>
>  config PINCTRL_MTK_PARIS
>         bool
> @@ -33,6 +41,7 @@ config PINCTRL_MTK_PARIS
>         select GPIOLIB
>         select EINT_MTK
>         select OF_GPIO
> +       select PINCTRL_MTK_V2
>
>  # For ARMv7 SoCs
>  config PINCTRL_MT2701
> --
> 1.8.1.1.dirty
>