From: Maarten Brock <m.brock@vanmierlo.com>
To: Daniel Mack <daniel@zonque.org>
Cc: devicetree@vger.kernel.org, linux-serial@vger.kernel.org,
gregkh@linuxfoundation.org, robh+dt@kernel.org, jslaby@suse.com,
pascal.huerst@gmail.com, linux-serial-owner@vger.kernel.org
Subject: Re: [PATCH 3/4] sc16is7xx: Always use falling edge IRQ
Date: Sat, 09 May 2020 14:41:38 +0200 [thread overview]
Message-ID: <d36a13cdeafd5fe35f662644b1c285c0@vanmierlo.com> (raw)
In-Reply-To: <20200508143757.2609740-4-daniel@zonque.org>
On 2020-05-08 16:37, Daniel Mack wrote:
> The driver currently only uses IRQF_TRIGGER_FALLING if the probing
> happened without a device-tree setup. The device however will always
> generate falling edges on its IRQ line, so let's use that flag in
> all cases.
Would it not be wise to also select IRQF_SHARED?
Which leads me to a more generic question: Is there a general method to
tell
in the device tree that an interrupt line is shared?
>
> Signed-off-by: Daniel Mack <daniel@zonque.org>
> ---
> drivers/tty/serial/sc16is7xx.c | 12 ++++--------
> 1 file changed, 4 insertions(+), 8 deletions(-)
>
> diff --git a/drivers/tty/serial/sc16is7xx.c
> b/drivers/tty/serial/sc16is7xx.c
> index e4025b8566a4..0997a5cac02a 100644
> --- a/drivers/tty/serial/sc16is7xx.c
> +++ b/drivers/tty/serial/sc16is7xx.c
> @@ -1185,7 +1185,7 @@ static int
> sc16is7xx_gpio_direction_output(struct gpio_chip *chip,
>
> static int sc16is7xx_probe(struct device *dev,
> const struct sc16is7xx_devtype *devtype,
> - struct regmap *regmap, int irq, unsigned long flags)
> + struct regmap *regmap, int irq)
> {
> struct sched_param sched_param = { .sched_priority = MAX_RT_PRIO / 2
> };
> unsigned long freq = 0, *pfreq = dev_get_platdata(dev);
> @@ -1318,7 +1318,7 @@ static int sc16is7xx_probe(struct device *dev,
>
> /* Setup interrupt */
> ret = devm_request_irq(dev, irq, sc16is7xx_irq,
> - flags, dev_name(dev), s);
> + IRQF_TRIGGER_FALLING, dev_name(dev), s);
> if (!ret)
> return 0;
>
> @@ -1392,7 +1392,6 @@ static struct regmap_config regcfg = {
> static int sc16is7xx_spi_probe(struct spi_device *spi)
> {
> const struct sc16is7xx_devtype *devtype;
> - unsigned long flags = 0;
> struct regmap *regmap;
> int ret;
>
> @@ -1413,14 +1412,13 @@ static int sc16is7xx_spi_probe(struct
> spi_device *spi)
> const struct spi_device_id *id_entry = spi_get_device_id(spi);
>
> devtype = (struct sc16is7xx_devtype *)id_entry->driver_data;
> - flags = IRQF_TRIGGER_FALLING;
> }
>
> regcfg.max_register = (0xf << SC16IS7XX_REG_SHIFT) |
> (devtype->nr_uart - 1);
> regmap = devm_regmap_init_spi(spi, ®cfg);
>
> - return sc16is7xx_probe(&spi->dev, devtype, regmap, spi->irq, flags);
> + return sc16is7xx_probe(&spi->dev, devtype, regmap, spi->irq);
> }
>
> static int sc16is7xx_spi_remove(struct spi_device *spi)
> @@ -1459,7 +1457,6 @@ static int sc16is7xx_i2c_probe(struct i2c_client
> *i2c,
> const struct i2c_device_id *id)
> {
> const struct sc16is7xx_devtype *devtype;
> - unsigned long flags = 0;
> struct regmap *regmap;
>
> if (i2c->dev.of_node) {
> @@ -1468,14 +1465,13 @@ static int sc16is7xx_i2c_probe(struct
> i2c_client *i2c,
> return -ENODEV;
> } else {
> devtype = (struct sc16is7xx_devtype *)id->driver_data;
> - flags = IRQF_TRIGGER_FALLING;
> }
>
> regcfg.max_register = (0xf << SC16IS7XX_REG_SHIFT) |
> (devtype->nr_uart - 1);
> regmap = devm_regmap_init_i2c(i2c, ®cfg);
>
> - return sc16is7xx_probe(&i2c->dev, devtype, regmap, i2c->irq, flags);
> + return sc16is7xx_probe(&i2c->dev, devtype, regmap, i2c->irq);
> }
>
> static int sc16is7xx_i2c_remove(struct i2c_client *client)
next prev parent reply other threads:[~2020-05-09 12:42 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-08 14:37 [PATCH 0/4] sc16is7xx: Add IrDA mode and threaded IRQ Daniel Mack
2020-05-08 14:37 ` [PATCH 1/4] dt-bindings: sc16is7xx: Add flag to activate IrDA mode Daniel Mack
2020-05-18 18:08 ` Rob Herring
2020-05-18 18:41 ` Daniel Mack
2020-05-19 12:01 ` Maarten Brock
2020-05-08 14:37 ` [PATCH 2/4] " Daniel Mack
2020-05-08 14:37 ` [PATCH 3/4] sc16is7xx: Always use falling edge IRQ Daniel Mack
2020-05-09 12:41 ` Maarten Brock [this message]
2020-05-08 14:37 ` [PATCH 4/4] sc16is7xx: Use threaded IRQ Daniel Mack
2020-05-09 12:55 ` Maarten Brock
2020-05-17 20:44 ` Daniel Mack
2020-05-18 11:14 ` Maarten Brock
2020-05-18 16:57 ` Daniel Mack
2020-05-19 16:32 ` Maarten Brock
2020-05-19 17:37 ` Daniel Mack
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=d36a13cdeafd5fe35f662644b1c285c0@vanmierlo.com \
--to=m.brock@vanmierlo.com \
--cc=daniel@zonque.org \
--cc=devicetree@vger.kernel.org \
--cc=gregkh@linuxfoundation.org \
--cc=jslaby@suse.com \
--cc=linux-serial-owner@vger.kernel.org \
--cc=linux-serial@vger.kernel.org \
--cc=pascal.huerst@gmail.com \
--cc=robh+dt@kernel.org \
/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).