From: Samuel Holland <samuel@sholland.org>
To: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Cc: Hans de Goede <hdegoede@redhat.com>,
Rob Herring <robh+dt@kernel.org>,
Maxime Ripard <mripard@kernel.org>, Chen-Yu Tsai <wens@csie.org>,
Jernej Skrabec <jernej.skrabec@siol.net>,
devicetree@vger.kernel.org, linux-input@vger.kernel.org,
linux-kernel@vger.kernel.org, linux-sunxi@lists.linux.dev,
Samuel Holland <samuel@sholland.org>,
Ondrej Jirman <megous@megous.com>
Subject: [PATCH resend v3 2/2] input: sun4i-lradc-keys - Add wakup support
Date: Thu, 5 Aug 2021 00:12:41 -0500 [thread overview]
Message-ID: <20210805051241.47168-3-samuel@sholland.org> (raw)
In-Reply-To: <20210805051241.47168-1-samuel@sholland.org>
From: Ondrej Jirman <megous@megous.com>
Allow the driver to wake the system on key press if the "wakeup-source"
property is provided in the device tree. Using the LRADC as a wakeup
source requires keeping the AVCC domain active during sleep. Since this
has a nontrivial impact on power consumption (sometimes doubling it),
disable the LRADC wakeup source by default.
Acked-by: Maxime Ripard <mripard@kernel.org>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Ondrej Jirman <megous@megous.com>
Signed-off-by: Samuel Holland <samuel@sholland.org>
---
drivers/input/keyboard/sun4i-lradc-keys.c | 20 ++++++++++++++++----
1 file changed, 16 insertions(+), 4 deletions(-)
diff --git a/drivers/input/keyboard/sun4i-lradc-keys.c b/drivers/input/keyboard/sun4i-lradc-keys.c
index 4a796bed48ac..af1683d68c8c 100644
--- a/drivers/input/keyboard/sun4i-lradc-keys.c
+++ b/drivers/input/keyboard/sun4i-lradc-keys.c
@@ -22,6 +22,8 @@
#include <linux/module.h>
#include <linux/of_platform.h>
#include <linux/platform_device.h>
+#include <linux/pm_wakeirq.h>
+#include <linux/pm_wakeup.h>
#include <linux/regulator/consumer.h>
#include <linux/slab.h>
@@ -226,8 +228,7 @@ static int sun4i_lradc_probe(struct platform_device *pdev)
{
struct sun4i_lradc_data *lradc;
struct device *dev = &pdev->dev;
- int i;
- int error;
+ int error, i, irq;
lradc = devm_kzalloc(dev, sizeof(struct sun4i_lradc_data), GFP_KERNEL);
if (!lradc)
@@ -272,8 +273,11 @@ static int sun4i_lradc_probe(struct platform_device *pdev)
if (IS_ERR(lradc->base))
return PTR_ERR(lradc->base);
- error = devm_request_irq(dev, platform_get_irq(pdev, 0),
- sun4i_lradc_irq, 0,
+ irq = platform_get_irq(pdev, 0);
+ if (irq < 0)
+ return irq;
+
+ error = devm_request_irq(dev, irq, sun4i_lradc_irq, 0,
"sun4i-a10-lradc-keys", lradc);
if (error)
return error;
@@ -282,6 +286,14 @@ static int sun4i_lradc_probe(struct platform_device *pdev)
if (error)
return error;
+ if (device_property_read_bool(dev, "wakeup-source")) {
+ device_set_wakeup_capable(dev, true);
+
+ error = dev_pm_set_wake_irq(dev, irq);
+ if (error)
+ dev_warn(dev, "Failed to set wake IRQ\n");
+ }
+
return 0;
}
--
2.26.3
prev parent reply other threads:[~2021-08-05 5:12 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-05 5:12 [PATCH resend v3 0/2] sunxi LRADC/volume key wakeup support Samuel Holland
2021-08-05 5:12 ` [PATCH resend v3 1/2] dt-bindings: sun4i-a10-lradc-keys: Accept wakeup-source property Samuel Holland
2021-08-05 5:12 ` Samuel Holland [this message]
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=20210805051241.47168-3-samuel@sholland.org \
--to=samuel@sholland.org \
--cc=devicetree@vger.kernel.org \
--cc=dmitry.torokhov@gmail.com \
--cc=hdegoede@redhat.com \
--cc=jernej.skrabec@siol.net \
--cc=linux-input@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-sunxi@lists.linux.dev \
--cc=megous@megous.com \
--cc=mripard@kernel.org \
--cc=robh+dt@kernel.org \
--cc=wens@csie.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).