linux-kernel - [PATCH v2 3/3] Input: cyttsp

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <bfd64d1a8478adb89c84c9d718505e82ad6e7a1f.1451997697.git.oreste.salerno@tomtom.com>
Date:	Tue, 5 Jan 2016 13:59:15 +0100
From:	Oreste Salerno <oreste.salerno@...tom.com>
To:	<linux-kernel@...r.kernel.org>
CC:	<linux-input@...r.kernel.org>, <fery@...ress.com>,
	<dmitry.torokhov@...il.com>, <robh+dt@...nel.org>,
	<pawel.moll@....com>, <mark.rutland@....com>,
	<ijc+devicetree@...lion.org.uk>, <galak@...eaurora.org>,
	<devicetree@...r.kernel.org>, <oreste.salerno@...tom.com>
Subject: [PATCH v2 3/3] Input: cyttsp - add default init function

When using device trees, it's not possible to assign an init()
function in the platform data.
In case the init function has not been assigned, attempt to
perform a hard reset of the chip, using reset gpio defined in the
platform data / device tree.

Signed-off-by: Oreste Salerno <oreste.salerno@...tom.com>
---
 drivers/input/touchscreen/cyttsp_core.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/drivers/input/touchscreen/cyttsp_core.c b/drivers/input/touchscreen/cyttsp_core.c
index 8390236..9872333 100644
--- a/drivers/input/touchscreen/cyttsp_core.c
+++ b/drivers/input/touchscreen/cyttsp_core.c
@@ -238,6 +238,16 @@ static int cyttsp_set_sysinfo_regs(struct cyttsp *ts)
 	return retval;
 }
 
+static void cyttsp_hard_reset(struct cyttsp *ts)
+{
+	if (ts->pdata->reset_gpio) {
+		gpiod_set_value_cansleep(ts->pdata->reset_gpio, 1);
+		msleep(CY_DELAY_DFLT);
+		gpiod_set_value_cansleep(ts->pdata->reset_gpio, 0);
+		msleep(CY_DELAY_DFLT);
+	}
+}
+
 static int cyttsp_soft_reset(struct cyttsp *ts)
 {
 	unsigned long timeout;
@@ -659,6 +669,8 @@ struct cyttsp *cyttsp_probe(const struct cyttsp_bus_ops *bus_ops,
 				error);
 			goto err_free_mem;
 		}
+	} else {
+		cyttsp_hard_reset(ts);
 	}
 
 	input_dev->name = pdata->name;
-- 
1.9.1

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/