From: Vignesh R <vigneshr@ti.com>
To: Dmitry Torokhov <dmitry.torokhov@gmail.com>,
Lee Jones <lee.jones@linaro.org>
Cc: Vignesh R <vigneshr@ti.com>,
Grygorii Strashko <grygorii.strashko@ti.com>,
Dave Gerlach <d-gerlach@ti.com>, <linux-input@vger.kernel.org>,
<linux-kernel@vger.kernel.org>
Subject: [PATCH 2/3] Input: ti_am335x_tsc - Prevent system suspend when TSC is in use
Date: Mon, 16 May 2016 16:56:23 +0530 [thread overview]
Message-ID: <1463397984-15766-3-git-send-email-vigneshr@ti.com> (raw)
In-Reply-To: <1463397984-15766-1-git-send-email-vigneshr@ti.com>
From: Grygorii Strashko <grygorii.strashko@ti.com>
Prevent system suspend while user has finger on touch screen,
because TSC is wakeup source and suspending device while in use will
result in failure to disable the module.
This patch uses pm_stay_awake() and pm_relax() APIs to prevent and
resume system suspend as required.
Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
Signed-off-by: Vignesh R <vigneshr@ti.com>
---
drivers/input/touchscreen/ti_am335x_tsc.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/input/touchscreen/ti_am335x_tsc.c b/drivers/input/touchscreen/ti_am335x_tsc.c
index f9fefbe337b9..4683ed18b9f8 100644
--- a/drivers/input/touchscreen/ti_am335x_tsc.c
+++ b/drivers/input/touchscreen/ti_am335x_tsc.c
@@ -275,6 +275,7 @@ static irqreturn_t titsc_irq(int irq, void *dev)
if (status & IRQENB_HW_PEN) {
ts_dev->pen_down = true;
irqclr |= IRQENB_HW_PEN;
+ pm_stay_awake(ts_dev->mfd_tscadc->dev);
}
if (status & IRQENB_PENUP) {
@@ -284,6 +285,7 @@ static irqreturn_t titsc_irq(int irq, void *dev)
input_report_key(input_dev, BTN_TOUCH, 0);
input_report_abs(input_dev, ABS_PRESSURE, 0);
input_sync(input_dev);
+ pm_relax(ts_dev->mfd_tscadc->dev);
} else {
ts_dev->pen_down = true;
}
@@ -522,6 +524,7 @@ static int __maybe_unused titsc_resume(struct device *dev)
titsc_writel(ts_dev, REG_IRQWAKEUP,
0x00);
titsc_writel(ts_dev, REG_IRQCLR, IRQENB_HW_PEN);
+ pm_relax(ts_dev->mfd_tscadc->dev);
}
titsc_step_config(ts_dev);
titsc_writel(ts_dev, REG_FIFO0THR,
--
2.8.2
next prev parent reply other threads:[~2016-05-16 11:35 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-05-16 11:26 [PATCH 0/3] AM335x: tsc: Fix suspended while touchscreen in use Vignesh R
2016-05-16 11:26 ` [PATCH 1/3] Input: ti_am335x_tsc - Mark IRQ as wakeup capable Vignesh R
2016-05-16 19:46 ` Dmitry Torokhov
2016-05-17 10:14 ` Vignesh R
2016-05-16 11:26 ` Vignesh R [this message]
2016-05-16 11:26 ` [PATCH 3/3] Input: ti_am335x_tsc - Ack pending IRQs at probe and before suspend Vignesh R
2016-05-16 19:44 ` Dmitry Torokhov
2016-05-17 5:56 ` Lee Jones
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=1463397984-15766-3-git-send-email-vigneshr@ti.com \
--to=vigneshr@ti.com \
--cc=d-gerlach@ti.com \
--cc=dmitry.torokhov@gmail.com \
--cc=grygorii.strashko@ti.com \
--cc=lee.jones@linaro.org \
--cc=linux-input@vger.kernel.org \
--cc=linux-kernel@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 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).