Thread (17 messages) 17 messages, 2 authors, 2020-01-22

Re: [PATCH v3 6/6] Input: edt-ft5x06 - improve power management operations

From: Marco Felsch <hidden>
Date: 2020-01-16 13:32:26
Also in: linux-devicetree

Hi Dmitry,

On 20-01-10 08:18, Marco Felsch wrote:
On 20-01-10 08:16, Marco Felsch wrote:
quoted
Hi Dmitry,

On 20-01-09 17:09, Dmitry Torokhov wrote:
quoted
Hi Marco,

On Wed, Jan 08, 2020 at 12:10:50PM +0100, Marco Felsch wrote:
quoted
+static int __maybe_unused edt_ft5x06_ts_resume(struct device *dev)
+{
+	struct i2c_client *client = to_i2c_client(dev);
+	struct edt_ft5x06_ts_data *tsdata = i2c_get_clientdata(client);
+	int ret;
+
+	if (device_may_wakeup(dev))
+		return 0;
+
+	ret = regulator_enable(tsdata->vcc);
+	if (ret)
+		dev_warn(dev, "Failed to enable vcc\n");
I wonder if we should not return error here instead of continuing. If
device is not powered up properly we'll have hard time communicating
with it.
That's a reasonable point.
quoted
The same is for suspend: maybe we should abort if we can't switch off
regulator or write to the device.
I have no strong opinion about that case but IMHO it's okay to go further
if we can't switch it off. Instead we should print a warning.
I just noticed that we do that already.. So the suspend case should be
okay.

Is it okay to check the return val for the resume case only? I want to
prepare a v4 of this patch to get this done.

Regards,
  Marco
quoted
Regards,
  Marco
quoted
Thanks.

-- 
Dmitry
-- 
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