devicetree.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: Sam Protsenko <semen.protsenko@linaro.org>
Cc: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>,
	Rob Herring <robh+dt@kernel.org>, Mark Brown <broonie@kernel.org>,
	Jaewon Kim <jaewon02.kim@samsung.com>,
	Chanho Park <chanho61.park@samsung.com>,
	David Virag <virag.david003@gmail.com>,
	Youngmin Nam <youngmin.nam@samsung.com>,
	devicetree@vger.kernel.org, linux-spi@vger.kernel.org,
	linux-serial@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org, linux-samsung-soc@vger.kernel.org,
	linux-i2c@vger.kernel.org
Subject: Re: [PATCH 6/8] tty: serial: Make SERIAL_SAMSUNG=y impossible when EXYNOS_USI_V2=m
Date: Sun, 28 Nov 2021 15:27:00 +0100	[thread overview]
Message-ID: <YaORtBO4b9AyFYyd@kroah.com> (raw)
In-Reply-To: <20211127223253.19098-7-semen.protsenko@linaro.org>

On Sun, Nov 28, 2021 at 12:32:51AM +0200, Sam Protsenko wrote:
> When UART is encapsulated in USIv2 block (e.g. in Exynos850), USIv2
> driver must be loaded first, as it's preparing USI hardware for
> particular protocol use. Make it impossible for Samsung serial driver to
> be built-in when USIv2 driver is built as a module, to prevent incorrect
> booting order for those drivers.
> 
> Signed-off-by: Sam Protsenko <semen.protsenko@linaro.org>
> ---
>  drivers/tty/serial/Kconfig | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/tty/serial/Kconfig b/drivers/tty/serial/Kconfig
> index 0e5ccb25bdb1..47bc24e74041 100644
> --- a/drivers/tty/serial/Kconfig
> +++ b/drivers/tty/serial/Kconfig
> @@ -237,6 +237,7 @@ config SERIAL_CLPS711X_CONSOLE
>  config SERIAL_SAMSUNG
>  	tristate "Samsung SoC serial support"
>  	depends on PLAT_SAMSUNG || ARCH_S5PV210 || ARCH_EXYNOS || ARCH_APPLE || COMPILE_TEST
> +	depends on EXYNOS_USI_V2 || !EXYNOS_USI_V2

That's odd, and is not going to help if everything is built as a module
and loaded that way.

This needs to be done properly in code to handle the issues if the
"wrong" code is loaded first.  Please trigger off of the hardware type
correctly so you don't have to worry about this at all.

thanks,

greg k-h

  reply	other threads:[~2021-11-28 14:29 UTC|newest]

Thread overview: 27+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-11-27 22:32 [PATCH 0/8] soc: samsung: Add USIv2 driver Sam Protsenko
2021-11-27 22:32 ` [PATCH 1/8] dt-bindings: soc: samsung: Add Exynos USIv2 bindings Sam Protsenko
2021-11-27 22:32 ` [PATCH 2/8] dt-bindings: soc: samsung: Add Exynos USIv2 bindings doc Sam Protsenko
2021-11-29  8:33   ` Krzysztof Kozlowski
2021-11-27 22:32 ` [PATCH 3/8] soc: samsung: Add USIv2 driver Sam Protsenko
2021-11-29  8:49   ` Krzysztof Kozlowski
2021-11-27 22:32 ` [PATCH 4/8] tty: serial: samsung: Remove USI initialization Sam Protsenko
2021-11-28 14:28   ` Greg Kroah-Hartman
2021-11-28 16:26     ` Sam Protsenko
2021-11-28 17:03       ` Sam Protsenko
2021-11-27 22:32 ` [PATCH 5/8] tty: serial: samsung: Enable console as module Sam Protsenko
2021-11-29  8:52   ` Krzysztof Kozlowski
2021-11-29 20:18     ` Sam Protsenko
2021-11-29 20:38       ` Sam Protsenko
2021-11-27 22:32 ` [PATCH 6/8] tty: serial: Make SERIAL_SAMSUNG=y impossible when EXYNOS_USI_V2=m Sam Protsenko
2021-11-28 14:27   ` Greg Kroah-Hartman [this message]
2021-11-28 23:54     ` Sam Protsenko
2021-11-27 22:32 ` [PATCH 7/8] i2c: Make I2C_EXYNOS5=y " Sam Protsenko
2021-11-29  0:02   ` Sam Protsenko
2021-11-27 22:32 ` [PATCH 8/8] spi: Make SPI_S3C64XX=y " Sam Protsenko
2021-11-29  0:02   ` Sam Protsenko
2021-11-28  3:15 ` [PATCH 0/8] soc: samsung: Add USIv2 driver David Virag
2021-11-29  9:02   ` Krzysztof Kozlowski
2021-11-29 13:56   ` Sam Protsenko
2021-11-29 17:35     ` Krzysztof Kozlowski
2021-11-29 19:19     ` David Virag
2021-11-30  0:01       ` Sam Protsenko

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=YaORtBO4b9AyFYyd@kroah.com \
    --to=gregkh@linuxfoundation.org \
    --cc=broonie@kernel.org \
    --cc=chanho61.park@samsung.com \
    --cc=devicetree@vger.kernel.org \
    --cc=jaewon02.kim@samsung.com \
    --cc=krzysztof.kozlowski@canonical.com \
    --cc=linux-arm-kernel@lists.infradead.org \
    --cc=linux-i2c@vger.kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-samsung-soc@vger.kernel.org \
    --cc=linux-serial@vger.kernel.org \
    --cc=linux-spi@vger.kernel.org \
    --cc=robh+dt@kernel.org \
    --cc=semen.protsenko@linaro.org \
    --cc=virag.david003@gmail.com \
    --cc=youngmin.nam@samsung.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).