All of lore.kernel.org
 help / color / mirror / Atom feed
From: Zhaoyang Huang <zhaoyang.huang@linaro.org>
To: linux-pm@vger.kernel.org
Cc: amit.kucheria@linaro.org
Subject: [PATCH v3] modify pl011 driver to work as wakeup source
Date: Wed,  2 Sep 2015 09:58:08 +0800	[thread overview]
Message-ID: <1441159088-7446-1-git-send-email-zhaoyang.huang@linaro.org> (raw)

the commit use the latest dev_pm_set_wake_irq API instead
of the enable_irq_wake and IRQF_NO_SUSPEND to configure the
ttyAMA device to work as the wakeup source

Signed-off-by: Zhaoyang Huang <zhaoyang.huang@linaro.org>
---
 drivers/tty/serial/amba-pl011.c |   42 ++++++++++++++++++++++++++++++++++++++-
 1 file changed, 41 insertions(+), 1 deletion(-)

diff --git a/drivers/tty/serial/amba-pl011.c b/drivers/tty/serial/amba-pl011.c
index 50cf5b1..98d2015 100644
--- a/drivers/tty/serial/amba-pl011.c
+++ b/drivers/tty/serial/amba-pl011.c
@@ -59,6 +59,11 @@
 #include <linux/sizes.h>
 #include <linux/io.h>
 #include <linux/acpi.h>
+#include <linux/suspend.h>
+#include <linux/pm_wakeirq.h>
+#include <linux/irq.h>
+
+static struct device *uart_dev;
 
 #define UART_NR			14
 
@@ -2353,11 +2358,29 @@ static int pl011_register_port(struct uart_amba_port *uap)
 	return ret;
 }
 
+struct uart_match {
+	struct uart_port *port;
+	struct uart_driver *driver;
+};
+
+static int match_uart_port(struct device *dev, void *data)
+{
+	struct uart_match *match = data;
+
+	dev_t devt = MKDEV(match->driver->major, match->driver->minor) +
+		match->port->line;
+
+	pr_info("the match data of ttyAMA0 is %d %d\n",
+			(int)devt, (int)dev->devt);
+
+	return dev->devt == devt; /* Actually, only one tty per port */
+}
 static int pl011_probe(struct amba_device *dev, const struct amba_id *id)
 {
 	struct uart_amba_port *uap;
 	struct vendor_data *vendor = id->data;
 	int portnr, ret;
+	struct uart_match match;
 
 	portnr = pl011_find_free_port();
 	if (portnr < 0)
@@ -2387,13 +2410,30 @@ static int pl011_probe(struct amba_device *dev, const struct amba_id *id)
 
 	amba_set_drvdata(dev, uap);
 
-	return pl011_register_port(uap);
+	ret = pl011_register_port(uap);
+
+	match.port = &uap->port;
+	match.driver = &amba_reg;
+
+	uart_dev = device_find_child(&dev->dev, &match, match_uart_port);
+
+	if (uart_dev) {
+		device_init_wakeup(uart_dev, true);
+		dev_pm_set_wake_irq(uart_dev, uap->port.irq);
+	}
+
+	return ret;
 }
 
 static int pl011_remove(struct amba_device *dev)
 {
 	struct uart_amba_port *uap = amba_get_drvdata(dev);
 
+	if (uart_dev) {
+		dev_pm_clear_wake_irq(uart_dev);
+		device_init_wakeup(uart_dev, false);
+	}
+
 	uart_remove_one_port(&amba_reg, &uap->port);
 	pl011_unregister_port(uap);
 	return 0;
-- 
1.7.9.5


                 reply	other threads:[~2015-09-02  1:58 UTC|newest]

Thread overview: [no followups] expand[flat|nested]  mbox.gz  Atom feed

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=1441159088-7446-1-git-send-email-zhaoyang.huang@linaro.org \
    --to=zhaoyang.huang@linaro.org \
    --cc=amit.kucheria@linaro.org \
    --cc=linux-pm@vger.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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.