From: Martin Kepplinger <martin.kepplinger@ginzinger.com> To: <dmitry.torokhov@gmail.com> Cc: <linux-input@vger.kernel.org>, <linux-kernel@vger.kernel.org>, Martin Kepplinger <martin.kepplinger@ginzinger.com> Subject: [PATCH 1/2] input: touchscreen: ar1021_i2c: enable touch mode during open Date: Thu, 27 Apr 2017 14:22:35 +0200 [thread overview] Message-ID: <1493295756-17812-1-git-send-email-martin.kepplinger@ginzinger.com> (raw) The device could as well be in command mode, in which this driver cannot handle the device. When opening the device, let's make sure the device will be in the mode we expect it to be for this driver. Signed-off-by: Martin Kepplinger <martin.kepplinger@ginzinger.com> --- drivers/input/touchscreen/ar1021_i2c.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/drivers/input/touchscreen/ar1021_i2c.c b/drivers/input/touchscreen/ar1021_i2c.c index 1a94d8b..2a76231 100644 --- a/drivers/input/touchscreen/ar1021_i2c.c +++ b/drivers/input/touchscreen/ar1021_i2c.c @@ -18,6 +18,12 @@ #define AR1021_MAX_X 4095 #define AR1021_MAX_Y 4095 +#define AR1021_CMD 0x55 +#define AR1021_TOUCH 0x80 + +#define AR1021_CMD_ENABLE_TOUCH 0x12 +#define AR1021_CMD_DISABLE_TOUCH 0x13 + struct ar1021_i2c { struct i2c_client *client; struct input_dev *input; @@ -58,6 +64,15 @@ static int ar1021_i2c_open(struct input_dev *dev) { struct ar1021_i2c *ar1021 = input_get_drvdata(dev); struct i2c_client *client = ar1021->client; + int error; + u8 cmd_enable_touch[3] = {AR1021_CMD, + 0x01, /* number of bytes after this */ + AR1021_CMD_ENABLE_TOUCH }; + + error = i2c_master_send(ar1021->client, cmd_enable_touch, + sizeof(cmd_enable_touch)); + if (error < 0) + return error; enable_irq(client->irq); -- 2.1.4
WARNING: multiple messages have this Message-ID (diff)
From: Martin Kepplinger <martin.kepplinger@ginzinger.com> To: dmitry.torokhov@gmail.com Cc: linux-input@vger.kernel.org, linux-kernel@vger.kernel.org, Martin Kepplinger <martin.kepplinger@ginzinger.com> Subject: [PATCH 1/2] input: touchscreen: ar1021_i2c: enable touch mode during open Date: Thu, 27 Apr 2017 14:22:35 +0200 [thread overview] Message-ID: <1493295756-17812-1-git-send-email-martin.kepplinger@ginzinger.com> (raw) The device could as well be in command mode, in which this driver cannot handle the device. When opening the device, let's make sure the device will be in the mode we expect it to be for this driver. Signed-off-by: Martin Kepplinger <martin.kepplinger@ginzinger.com> --- drivers/input/touchscreen/ar1021_i2c.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/drivers/input/touchscreen/ar1021_i2c.c b/drivers/input/touchscreen/ar1021_i2c.c index 1a94d8b..2a76231 100644 --- a/drivers/input/touchscreen/ar1021_i2c.c +++ b/drivers/input/touchscreen/ar1021_i2c.c @@ -18,6 +18,12 @@ #define AR1021_MAX_X 4095 #define AR1021_MAX_Y 4095 +#define AR1021_CMD 0x55 +#define AR1021_TOUCH 0x80 + +#define AR1021_CMD_ENABLE_TOUCH 0x12 +#define AR1021_CMD_DISABLE_TOUCH 0x13 + struct ar1021_i2c { struct i2c_client *client; struct input_dev *input; @@ -58,6 +64,15 @@ static int ar1021_i2c_open(struct input_dev *dev) { struct ar1021_i2c *ar1021 = input_get_drvdata(dev); struct i2c_client *client = ar1021->client; + int error; + u8 cmd_enable_touch[3] = {AR1021_CMD, + 0x01, /* number of bytes after this */ + AR1021_CMD_ENABLE_TOUCH }; + + error = i2c_master_send(ar1021->client, cmd_enable_touch, + sizeof(cmd_enable_touch)); + if (error < 0) + return error; enable_irq(client->irq); -- 2.1.4
next reply other threads:[~2017-04-27 12:23 UTC|newest] Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top 2017-04-27 12:22 Martin Kepplinger [this message] 2017-04-27 12:22 ` [PATCH 1/2] input: touchscreen: ar1021_i2c: enable touch mode during open Martin Kepplinger 2017-04-27 12:22 ` [PATCH 2/2] input: touchscreen: ar1021_i2c: replace magic number with definition Martin Kepplinger 2017-04-27 12:22 ` Martin Kepplinger 2017-04-28 17:06 ` Dmitry Torokhov 2017-04-30 19:38 ` [PATCH 2/2 v2] input: touchscreen: ar1021_i2c: use BIT to check for a bit Martin Kepplinger 2017-05-01 19:39 ` Dmitry Torokhov 2017-04-28 17:02 ` [PATCH 1/2] input: touchscreen: ar1021_i2c: enable touch mode during open Dmitry Torokhov 2018-02-05 10:07 ` Christian Gmeiner 2018-02-05 10:40 ` Martin Kepplinger 2018-02-16 16:38 ` Christian Gmeiner 2018-02-06 1:20 ` Dmitry Torokhov 2018-02-16 16:46 ` Christian Gmeiner
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