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Date: Sat, 8 Aug 2009 16:02:51 +0200
From: Pavel Machek <pavel@....cz>
To: Dmitry Torokhov <dmitry.torokhov@...il.com>
Cc: Arve Hj?nnev?g <arve@...roid.com>,
kernel list <linux-kernel@...r.kernel.org>,
Brian Swetland <swetland@...gle.com>,
linux-input@...r.kernel.org, Andrew Morton <akpm@...l.org>,
Greg KH <greg@...ah.com>
Subject: HTC Dream for staging: small cleanups [was Re: Support for
synaptic touchscreen in HTC dream]
Hi!
> > This adds support for synaptic touchscreen, used in HTC dream
> > cellphone.
> >
> > Signed-off-by: Pavel Machek <pavel@....cz>
>
> This is pretty large body of code, could we get a sign-off from Arve as
> well since he seems to be the author?
Yes; it is now in staging with his sign-offs.
> > +config TOUCHSCREEN_SYNAPTICS_I2C_RMI
> > + tristate "Synaptics i2c touchscreen"
> > + depends on I2C
> > + help
> > + This enables support for Synaptics RMI over I2C based touchscreens.
> > + Such touchscreen is used in HTC Dream.
> > +
>
> To compile this driver as a module...
Ok.
> > +static struct workqueue_struct *synaptics_wq;
>
> Do we need a separate workqueue? Is reading the device that slow that we
> can use keventd?
Added to the TODO.
> > + int snap_up[2];
> > + u32 flags;
> > + int (*power)(int on);
>
> 'bool on'?
Added to the TODO.
> > +static int i2c_read(struct synaptics_ts_data *ts, u8 reg, char *msg)
> > +{
> > + int ret = i2c_smbus_read_byte_data(ts->client, 0xf0);
>
> We are not using 'reg'?
Fixed, thanks.
> Some more info as to what you are trying to do here would be nice.
Done, Arve provided a comment.
> > + input_report_abs(ts->input_dev, ABS_PRESSURE, z);
> > + input_report_abs(ts->input_dev, ABS_TOOL_WIDTH, w);
> > + input_report_key(ts->input_dev, BTN_TOUCH, finger);
> > + finger2_pressed = finger > 1 && finger != 7;
> > + input_report_key(ts->input_dev, BTN_2, finger2_pressed);
> > + if (finger2_pressed) {
> > + input_report_abs(ts->input_dev, ABS_HAT0X, pos[1][0]);
> > + input_report_abs(ts->input_dev, ABS_HAT0Y, pos[1][1]);
>
> ABS_HAT is pretty unusual for a touchscreen...
Added to the TODO list. It should be cleaned up before merge.
> > + if ((buf[14] & 0xc0) != 0x40) {
> > + printk(KERN_WARNING "synaptics_ts_work_func:"
> > + " bad read %x %x %x %x %x %x %x %x %x"
> > + " %x %x %x %x %x %x, ret %d\n",
> > + buf[0], buf[1], buf[2], buf[3],
> > + buf[4], buf[5], buf[6], buf[7],
> > + buf[8], buf[9], buf[10], buf[11],
> > + buf[12], buf[13], buf[14], ret);
>
> Umm... for ()?
I removed debugging instead.
> > +static int synaptics_ts_probe(
>
> __devinit()
Done.
> > + ts->input_dev = input_allocate_device();
> > + if (ts->input_dev == NULL) {
> > + ret = -ENOMEM;
> > + pr_err("synaptics: Failed to allocate input device\n");
> > + goto err_input_dev_alloc_failed;
> > + }
> > + ts->input_dev->name = "synaptics-rmi-touchscreen";
>
> BUS_I2C, etc.
I'm doing this:
ts->input_dev->name = "synaptics-rmi-touchscreen";
ts->input_dev->phys = "msm/input0";
ts->input_dev->id.bustype = BUS_I2C;
I don't know if it is right; if you can suggest better strings...
> > + set_bit(EV_SYN, ts->input_dev->evbit);
>
> __set_bit(), no need to lock the bus.
Done.
> > + if (client->irq) {
> > + ret = request_irq(client->irq, synaptics_ts_irq_handler,
> > + 0, client->name, ts);
>
> I think threaded IRQ will fit the bill and will take care of
> IRQ/workqueue shutdown races. Of course you still need to use workqueue
> if polling.
Yep, but that's TODO for now.
> > + pr_info("synaptics: Start touchscreen %s in %s mode\n",
>
> Probably "synaptics_ts" throughout so nobody is confused?
Yep.
> > +static int synaptics_ts_remove(struct i2c_client *client)
>
> __devexit()
Ok.
> > +MODULE_DESCRIPTION("Synaptics Touchscreen Driver");
> > +MODULE_LICENSE("GPL");
>
> MODULE_AUTHOR()?
Fixed; this, and some others were fixed before. Here is just the new
stuff.
---
Small fixes to synaptics touchscreen driver, and add a TODO list of
stuff that should be fixed between merge into kernel proper.
Signed-off-by: Pavel Machek <pavel@....cz>
diff --git a/drivers/staging/dream/Kconfig b/drivers/staging/dream/Kconfig
index 1fdbd48..e19d403 100644
--- a/drivers/staging/dream/Kconfig
+++ b/drivers/staging/dream/Kconfig
@@ -8,4 +8,8 @@ config TOUCHSCREEN_SYNAPTICS_I2C_RMI
help
This enables support for Synaptics RMI over I2C based touchscreens.
+ To compile this driver as a module, choose M here: the
+ module will be called synaptics_i2c_rmi.
+
+
diff --git a/drivers/staging/dream/synaptics_i2c_rmi.c b/drivers/staging/dream/synaptics_i2c_rmi.c
index 6e23276..d786a55 100644
--- a/drivers/staging/dream/synaptics_i2c_rmi.c
+++ b/drivers/staging/dream/synaptics_i2c_rmi.c
@@ -189,13 +189,7 @@ static void synaptics_ts_work_func(struct work_struct *work)
continue;
}
if ((buf[14] & 0xc0) != 0x40) {
- pr_warning("synaptics_ts_work_func:"
- " bad read %x %x %x %x %x %x %x %x %x"
- " %x %x %x %x %x %x, ret %d\n",
- buf[0], buf[1], buf[2], buf[3],
- buf[4], buf[5], buf[6], buf[7],
- buf[8], buf[9], buf[10], buf[11],
- buf[12], buf[13], buf[14], ret);
+ pr_warning("synaptics_ts_work_func: bad data\n");
if (bad_data)
synaptics_init_panel(ts);
bad_data = 1;
@@ -517,7 +511,7 @@ static int __devinit synaptics_ts_probe(
register_early_suspend(&ts->early_suspend);
#endif
- pr_info("synaptics: Start touchscreen %s in %s mode\n",
+ pr_info("synaptics_ts: Start touchscreen %s in %s mode\n",
ts->input_dev->name, ts->use_irq ? "interrupt" : "polling");
return 0;
@@ -534,7 +528,7 @@ err_check_functionality_failed:
return ret;
}
-static int synaptics_ts_remove(struct i2c_client *client)
+static int __devexit synaptics_ts_remove(struct i2c_client *client)
{
struct synaptics_ts_data *ts = i2c_get_clientdata(client);
#ifdef CONFIG_HAS_EARLYSUSPEND
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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