linux-kernel - Re: [PATCH 2/5] pinctrl: meson: Add support to set direction with a secure monitor call

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Date:   Wed, 1 Aug 2018 22:23:00 +0200
From:   Martin Blumenstingl <martin.blumenstingl@...glemail.com>
To:     Neil Armstrong <narmstrong@...libre.com>
Cc:     khilman@...libre.com, linus.walleij@...aro.org,
        linux-amlogic@...ts.infradead.org, linux-gpio@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH 2/5] pinctrl: meson: Add support to set direction with a
 secure monitor call

Hi Neil,

On Wed, Aug 1, 2018 at 12:05 PM Neil Armstrong <narmstrong@...libre.com> wrote:
>
> The Amlogic Meson GX and AXG SoCs needs to do a Secure Monitor call to
> set the TEST_N pin direction.
> This patch adds a "smc" boolean to the bank structure to differentiate
> the TEST_N bank and call the Secure Monitor in the _input/_output functions.
>
> Signed-off-by: Neil Armstrong <narmstrong@...libre.com>
> ---
>  drivers/pinctrl/meson/Kconfig         |  1 +
>  drivers/pinctrl/meson/pinctrl-meson.c | 31 ++++++++++++++++++++++++++-----
>  drivers/pinctrl/meson/pinctrl-meson.h | 10 +++++++++-
>  3 files changed, 36 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/pinctrl/meson/Kconfig b/drivers/pinctrl/meson/Kconfig
> index c80951d..1b90470 100644
> --- a/drivers/pinctrl/meson/Kconfig
> +++ b/drivers/pinctrl/meson/Kconfig
> @@ -8,6 +8,7 @@ menuconfig PINCTRL_MESON
>         select GPIOLIB
>         select OF_GPIO
>         select REGMAP_MMIO
> +       select MESON_SM
I wonder why PINCTRL_MESON has to select MESON_SM - shouldn't
PINCTRL_MESON_GXBB, PINCTRL_MESON_GXL and PINCTRL_MESON_AXG select it
instead?
selecting MESON_SM is probably no-op on Meson8 and Meson8b (which
don't have the GX secure monitor), but I haven't tested it yet


Regards
Martin