On Thu, 18 Sep 2014, Nishanth Menon wrote:
> +static irqreturn_t palmas_wake_irq(int irq, void *_palmas)
> +{
> + /*
> + * Return Not handled so that interrupt is disabled.
And how is that interrupt disabled by returning IRQ_NONE? You mean it
gets disabled after it got reraised 100000 times and the spurious
detector kills it?
> + * Level event ensures that the event is eventually handled
> + * by the appropriate chip handler already registered
Eventually handled? So eventually it's not handled?
> + */
> + return IRQ_NONE;
> +}
> +
> int palmas_ext_control_req_config(struct palmas *palmas,
> enum palmas_external_requestor_id id, int ext_ctrl, bool enable)
> {
> @@ -409,6 +420,7 @@ static void palmas_dt_to_pdata(struct i2c_client *i2c,
> pdata->mux_from_pdata = 1;
> pdata->pad2 = prop;
> }
> + pdata->wakeirq = irq_of_parse_and_map(node, 1);
>
> /* The default for this register is all masked */
> ret = of_property_read_u32(node, "ti,power-ctrl", &prop);
> @@ -521,6 +533,7 @@ static int palmas_i2c_probe(struct i2c_client *i2c,
> i2c_set_clientdata(i2c, palmas);
> palmas->dev = &i2c->dev;
> palmas->irq = i2c->irq;
> + palmas->wakeirq = pdata->wakeirq;
>
> match = of_match_device(of_palmas_match_tbl, &i2c->dev);
>
> @@ -587,6 +600,25 @@ static int palmas_i2c_probe(struct i2c_client *i2c,
> if (ret < 0)
> goto err_i2c;
>
> + if (!palmas->wakeirq)
> + goto no_wake_irq;
> +
> + ret = devm_request_irq(palmas->dev, palmas->wakeirq,
> + palmas_wake_irq,
> + pdata->irq_flags,
> + dev_name(palmas->dev),
> + &palmas);
> + if (ret < 0) {
> + dev_err(palmas->dev, "Invalid wakeirq(%d) (res: %d), skiping\n",
> + palmas->wakeirq, ret);
> + palmas->wakeirq = 0;
> + } else {
> + /* We use wakeirq only during suspend-resume path */
> + device_set_wakeup_capable(palmas->dev, true);
> + disable_irq_nosync(palmas->wakeirq);
Urgh. Why nosysnc? And why do you want to do that at all?
irq_set_status_flags(irq, IRQ_NOAUTOEN);
Is what you want to set before requesting the irq.
> + }
> +
> +no_wake_irq:
> no_irq:
> slave = PALMAS_BASE_TO_SLAVE(PALMAS_PU_PD_OD_BASE);
> addr = PALMAS_BASE_TO_REG(PALMAS_PU_PD_OD_BASE,
> @@ -706,6 +738,34 @@ static int palmas_i2c_remove(struct i2c_client *i2c)
> return 0;
> }
>
> +static int palmas_i2c_suspend(struct i2c_client *i2c, pm_message_t mesg)
> +{
> + struct palmas *palmas = i2c_get_clientdata(i2c);
> + struct device *dev = &i2c->dev;
> +
> + if (!palmas->wakeirq)
> + return 0;
> +
> + if (device_may_wakeup(dev))
> + enable_irq(palmas->wakeirq);
> +
> + return 0;
> +}
> +
> +static int palmas_i2c_resume(struct i2c_client *i2c)
> +{
> + struct palmas *palmas = i2c_get_clientdata(i2c);
> + struct device *dev = &i2c->dev;
> +
> + if (!palmas->wakeirq)
> + return 0;
> +
> + if (device_may_wakeup(dev))
> + disable_irq_nosync(palmas->wakeirq);
Again, why nosync?
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