From: Serge Semin <fancer.lancer@gmail.com>
To: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Serge Semin <Sergey.Semin@baikalelectronics.ru>,
linux-gpio@vger.kernel.org, linux-kernel@vger.kernel.org,
Hoan Tran <hoan@os.amperecomputing.com>,
Linus Walleij <linus.walleij@linaro.org>,
Bartosz Golaszewski <bgolaszewski@baylibre.com>
Subject: Re: [PATCH v1 2/2] gpio: dwapb: Switch to use fwnode_irq_get()
Date: Wed, 2 Jun 2021 17:05:46 +0300 [thread overview]
Message-ID: <20210602140546.b7o43jnrvdmtdam4@mobilestation> (raw)
In-Reply-To: <20210601162128.35663-2-andriy.shevchenko@linux.intel.com>
Hello Andy
On Tue, Jun 01, 2021 at 07:21:28PM +0300, Andy Shevchenko wrote:
> We have open coded variant of fwnode_irq_get() in dwapb_get_irq().
> Replace it with a simple call.
Sometime ago I was trying to figure out a way to simplify this part of
the driver by using the platform_get_irq_optional() method for both
ACPI and OF cases. As you must have already found out by yourself it
didn't work out because of DW APB GPIO DT-nodes are supposed to have
sub-nodes with ports description. The OF-descriptors of these
sub-nodes aren't touched by the platform_get_irq_optional() method, it
just fails to detect IRQ-controller because it only works with the
device OF-node. So I gave up and decided to leave the code as is. I
can't remember now why I haven't used fwnode_irq_get() here. Most
likely I just preferred a direct of_irq_get() invocation here just for
clarity, since the only way we'd be calling fwnode_irq_get() here is
to actually get IRQ number from the OF-node anyway, while the
acpi_irq_get() method call made from the method fwnode_irq_get() will
hardly ever be required here. If you think otherwise or I missing
something please tell me.
Anyway by applying your patch at least we'll save a few lines of the
code and may in future have swnode-base IRQs support in the
fwnode_irq_get() method. So it still worths merging in. Thanks for
suggesting this change.
Acked-by: Serge Semin <fancer.lancer@gmail.com>
Tested-by: Serge Semin <fancer.lancer@gmail.com>
-Sergey
>
> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
> ---
> drivers/gpio/gpio-dwapb.c | 12 ++++--------
> 1 file changed, 4 insertions(+), 8 deletions(-)
>
> diff --git a/drivers/gpio/gpio-dwapb.c b/drivers/gpio/gpio-dwapb.c
> index 939701c1465e..7d61f5821e32 100644
> --- a/drivers/gpio/gpio-dwapb.c
> +++ b/drivers/gpio/gpio-dwapb.c
> @@ -528,17 +528,13 @@ static int dwapb_gpio_add_port(struct dwapb_gpio *gpio,
> static void dwapb_get_irq(struct device *dev, struct fwnode_handle *fwnode,
> struct dwapb_port_property *pp)
> {
> - struct device_node *np = NULL;
> - int irq = -ENXIO, j;
> -
> - if (fwnode_property_read_bool(fwnode, "interrupt-controller"))
> - np = to_of_node(fwnode);
> + int irq, j;
>
> for (j = 0; j < pp->ngpio; j++) {
> - if (np)
> - irq = of_irq_get(np, j);
> - else if (has_acpi_companion(dev))
> + if (has_acpi_companion(dev))
> irq = platform_get_irq_optional(to_platform_device(dev), j);
> + else
> + irq = fwnode_irq_get(fwnode, j);
> if (irq > 0)
> pp->irq[j] = irq;
> }
> --
> 2.30.2
>
next prev parent reply other threads:[~2021-06-02 14:08 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-01 16:21 [PATCH v1 1/2] gpio: dwapb: Drop redundant check in dwapb_irq_set_type() Andy Shevchenko
2021-06-01 16:21 ` [PATCH v1 2/2] gpio: dwapb: Switch to use fwnode_irq_get() Andy Shevchenko
2021-06-02 13:35 ` Bartosz Golaszewski
2021-06-02 14:05 ` Serge Semin [this message]
2021-06-02 15:41 ` Andy Shevchenko
2021-06-02 13:34 ` [PATCH v1 1/2] gpio: dwapb: Drop redundant check in dwapb_irq_set_type() Bartosz Golaszewski
2021-06-02 14:07 ` Serge Semin
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