From: Hui Song <hui.song_1@nxp.com>
To: Shawn Guo <shawnguo@kernel.org>, Li Yang <leoyang.li@nxp.com>,
Rob Herring <robh+dt@kernel.org>,
Mark Rutland <mark.rutland@arm.com>,
Linus Walleij <linus.walleij@linaro.org>,
Bartosz Golaszewski <bgolaszewski@baylibre.com>
Cc: devicetree@vger.kernel.org, Song Hui <hui.song_1@nxp.com>,
linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org, linux-gpio@vger.kernel.org
Subject: [PATCH v5] gpio/mpc8xxx: change irq handler from chained to normal
Date: Mon, 16 Sep 2019 13:58:17 +0800 [thread overview]
Message-ID: <20190916055817.43425-1-hui.song_1@nxp.com> (raw)
From: Song Hui <hui.song_1@nxp.com>
More than one gpio controllers can share one interrupt, change the
driver to request shared irq.
Signed-off-by: Laurentiu Tudor <Laurentiu.Tudor@nxp.com>
Signed-off-by: Alex Marginean <alexandru.marginean@nxp.com>
Signed-off-by: Song Hui <hui.song_1@nxp.com>
---
Changes in v5:
- add traverse every bit function.
Changes in v4:
- convert 'pr_err' to 'dev_err'.
Changes in v3:
- update the patch description.
Changes in v2:
- delete the compatible of ls1088a.
drivers/gpio/gpio-mpc8xxx.c | 30 +++++++++++++++++++-----------
1 file changed, 19 insertions(+), 11 deletions(-)
diff --git a/drivers/gpio/gpio-mpc8xxx.c b/drivers/gpio/gpio-mpc8xxx.c
index 16a47de..3a06ca9 100644
--- a/drivers/gpio/gpio-mpc8xxx.c
+++ b/drivers/gpio/gpio-mpc8xxx.c
@@ -22,6 +22,7 @@
#include <linux/irq.h>
#include <linux/gpio/driver.h>
#include <linux/bitops.h>
+#include <linux/interrupt.h>
#define MPC8XXX_GPIO_PINS 32
@@ -127,20 +128,20 @@ static int mpc8xxx_gpio_to_irq(struct gpio_chip *gc, unsigned offset)
return -ENXIO;
}
-static void mpc8xxx_gpio_irq_cascade(struct irq_desc *desc)
+static irqreturn_t mpc8xxx_gpio_irq_cascade(int irq, void *data)
{
- struct mpc8xxx_gpio_chip *mpc8xxx_gc = irq_desc_get_handler_data(desc);
- struct irq_chip *chip = irq_desc_get_chip(desc);
+ struct mpc8xxx_gpio_chip *mpc8xxx_gc = (struct mpc8xxx_gpio_chip *)data;
struct gpio_chip *gc = &mpc8xxx_gc->gc;
unsigned int mask;
+ int i;
mask = gc->read_reg(mpc8xxx_gc->regs + GPIO_IER)
& gc->read_reg(mpc8xxx_gc->regs + GPIO_IMR);
- if (mask)
+ for_each_set_bit(i, &mask, 32)
generic_handle_irq(irq_linear_revmap(mpc8xxx_gc->irq,
- 32 - ffs(mask)));
- if (chip->irq_eoi)
- chip->irq_eoi(&desc->irq_data);
+ 31 - i));
+
+ return IRQ_HANDLED;
}
static void mpc8xxx_irq_unmask(struct irq_data *d)
@@ -388,8 +389,8 @@ static int mpc8xxx_probe(struct platform_device *pdev)
ret = gpiochip_add_data(gc, mpc8xxx_gc);
if (ret) {
- pr_err("%pOF: GPIO chip registration failed with status %d\n",
- np, ret);
+ dev_err(&pdev->dev, "%pOF: GPIO chip registration failed with status %d\n",
+ np, ret);
goto err;
}
@@ -409,8 +410,15 @@ static int mpc8xxx_probe(struct platform_device *pdev)
if (devtype->gpio_dir_in_init)
devtype->gpio_dir_in_init(gc);
- irq_set_chained_handler_and_data(mpc8xxx_gc->irqn,
- mpc8xxx_gpio_irq_cascade, mpc8xxx_gc);
+ ret = request_irq(mpc8xxx_gc->irqn, mpc8xxx_gpio_irq_cascade,
+ IRQF_NO_THREAD | IRQF_SHARED, "gpio-cascade",
+ mpc8xxx_gc);
+ if (ret) {
+ dev_err(&pdev->dev, "%s: failed to request_irq(%d), ret = %d\n",
+ np->full_name, mpc8xxx_gc->irqn, ret);
+ goto err;
+ }
+
return 0;
err:
iounmap(mpc8xxx_gc->regs);
--
2.9.5
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next reply other threads:[~2019-09-16 6:08 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-09-16 5:58 Hui Song [this message]
2019-09-18 7:36 ` [PATCH v5] gpio/mpc8xxx: change irq handler from chained to normal Bartosz Golaszewski
2019-09-26 15:35 ` Russell King - ARM Linux admin
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=20190916055817.43425-1-hui.song_1@nxp.com \
--to=hui.song_1@nxp.com \
--cc=bgolaszewski@baylibre.com \
--cc=devicetree@vger.kernel.org \
--cc=leoyang.li@nxp.com \
--cc=linus.walleij@linaro.org \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-gpio@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=mark.rutland@arm.com \
--cc=robh+dt@kernel.org \
--cc=shawnguo@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).