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From: Joel Stanley <joel@jms.id.au>
To: Zev Weiss <zev@bewilderbeest.net>, Jeremy Kerr <jk@ozlabs.org>
Cc: linux-aspeed <linux-aspeed@lists.ozlabs.org>,
	Andrew Jeffery <andrew@aj.id.au>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	OpenBMC Maillist <openbmc@lists.ozlabs.org>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	linux-serial@vger.kernel.org, Jiri Slaby <jirislaby@kernel.org>,
	Linux ARM <linux-arm-kernel@lists.infradead.org>
Subject: Re: [PATCH v2 2/3] drivers/tty/serial/8250: add DT property for aspeed vuart sirq polarity
Date: Thu, 1 Apr 2021 04:15:44 +0000	[thread overview]
Message-ID: <CACPK8XdPVf1WMmo8C8RJtd-1cH5qV9odEDhDUHWRiMOk=dQNtg@mail.gmail.com> (raw)
In-Reply-To: <20210401005702.28271-3-zev@bewilderbeest.net>

On Thu, 1 Apr 2021 at 00:57, Zev Weiss <zev@bewilderbeest.net> wrote:
>
> This provides a simple boolean to use instead of the deprecated
> aspeed,sirq-polarity-sense property.
>
> Signed-off-by: Zev Weiss <zev@bewilderbeest.net>
> ---
>  drivers/tty/serial/8250/8250_aspeed_vuart.c | 3 +++
>  1 file changed, 3 insertions(+)
>
> diff --git a/drivers/tty/serial/8250/8250_aspeed_vuart.c b/drivers/tty/serial/8250/8250_aspeed_vuart.c
> index c33e02cbde93..e5ef9f957f9a 100644
> --- a/drivers/tty/serial/8250/8250_aspeed_vuart.c
> +++ b/drivers/tty/serial/8250/8250_aspeed_vuart.c
> @@ -482,6 +482,9 @@ static int aspeed_vuart_probe(struct platform_device *pdev)
>                 of_node_put(sirq_polarity_sense_args.np);
>         }
>
> +       if (of_property_read_bool(np, "aspeed,sirq-active-high"))
> +               aspeed_vuart_set_sirq_polarity(vuart, 1);

This assumes the default is always low, so we don't need a property to
set it to that state?

Would it make more sense to have the property describe if it's high or
low? (I'm happy for the answer to be "no", as we've gotten by for the
past few years without it).

This brings up another point. We already have the sysfs file for
setting the lpc address, from userspace. In OpenBMC land this can be
set with obmc-console-client (/etc/obmc-console.conf). Should we add
support to that application for setting the irq polarity too, and do
away with device tree descriptions?

> +
>         aspeed_vuart_set_enabled(vuart, true);
>         aspeed_vuart_set_host_tx_discard(vuart, true);
>         platform_set_drvdata(pdev, vuart);
> --
> 2.31.1
>

  reply	other threads:[~2021-04-01  4:16 UTC|newest]

Thread overview: 27+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-03-30  0:23 [PATCH 0/3] simplify Aspeed VUART SIRQ polarity DT config, add e3c246d4i BMC dts Zev Weiss
2021-03-30  0:23 ` [PATCH 1/3] drivers/tty/serial/8250: simplify Aspeed VUART SIRQ polarity DT config Zev Weiss
2021-03-30  0:23 ` [PATCH 2/3] dt-bindings: serial: 8250: update for aspeed, sirq-active-high Zev Weiss
2021-03-30 22:39   ` [PATCH 2/3] dt-bindings: serial: 8250: update for aspeed,sirq-active-high Rob Herring
2021-03-30 23:04     ` Zev Weiss
2021-04-01  0:56       ` [PATCH v2 0/3] simplify Aspeed VUART SIRQ polarity DT config Zev Weiss
2021-04-01  0:57         ` [PATCH v2 1/3] dt-bindings: serial: 8250: deprecate aspeed, sirq-polarity-sense Zev Weiss
2021-04-01  3:53           ` Joel Stanley
2021-04-01  0:57         ` [PATCH v2 2/3] drivers/tty/serial/8250: add DT property for aspeed vuart sirq polarity Zev Weiss
2021-04-01  4:15           ` Joel Stanley [this message]
2021-04-01  5:18             ` Zev Weiss
2021-04-01  5:34               ` Andrew Jeffery
2021-04-01  7:36                 ` Zev Weiss
2021-04-01  0:57         ` [PATCH v2 3/3] dt-bindings: serial: 8250: add aspeed, sirq-active-high Zev Weiss
2021-04-01  4:04           ` Andrew Jeffery
2021-04-01  4:57             ` [PATCH v2 3/3] dt-bindings: serial: 8250: add aspeed,sirq-active-high Zev Weiss
2021-04-01 14:56           ` [PATCH v2 3/3] dt-bindings: serial: 8250: add aspeed, sirq-active-high Rob Herring
2021-03-30 23:26     ` [PATCH 2/3] dt-bindings: serial: 8250: update for " Joel Stanley
2021-03-30  0:23 ` [PATCH 3/3] ARM: dts: aspeed: add ASRock E3C246D4I BMC Zev Weiss
2021-03-31  7:41   ` Joel Stanley
2021-03-31  7:43     ` Joel Stanley
2021-03-31  7:50     ` Joel Stanley
2021-04-01  2:51       ` [PATCH] " Zev Weiss
2021-04-01  3:51         ` Joel Stanley
2021-04-01  4:09           ` Zev Weiss
2021-04-01  0:04   ` [PATCH 3/3] " Andrew Jeffery
2021-04-01  0:26     ` Zev Weiss

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