> Subject: Re: [PATCH v3 2/4] input: bbnsm_pwrkey: Add bbnsm power key
> support
>
> On Tue, Jan 03, 2023 at 15:47, Jacky Bai <ping.bai@xxxxxxx> wrote:
>
> > The ON/OFF logic inside the BBNSM allows for connecting directly into
> > a PMIC or other voltage regulator device. The module has an button
> > input signal and a wakeup request input signal. It also has two
> > interrupts (set_pwr_off_irq and set_pwr_on_irq) and an active-low PMIC
> > enable (pmic_en_b) output.
> >
> > Add the power key support for the ON/OFF button function found in
> > BBNSM module.
> >
> > Signed-off-by: Jacky Bai <ping.bai@xxxxxxx>
> > Reviewed-by: Peng Fan <peng.fan@xxxxxxx>
> > ---
> > - v2 changes:
> > - use device_property_read_u32() to read the property
>
> We state this in the changelog
>
> > - clean up the goto return, return directly
> > - sort the header file alphabetically
> > - rename the file to add 'nxp' prefix
> >
> > - v3 changes:
> > - get the regmap directly from the parent node
> > ---
...
> > + bbnsm->regmap = syscon_node_to_regmap(np->parent);
> > + if (IS_ERR(bbnsm->regmap)) {
> > + dev_err(&pdev->dev, "bbnsm pwerkey get regmap failed\n");
> > + return PTR_ERR(bbnsm->regmap);
> > + }
> > +
> > + if (of_property_read_u32(np, "linux,code", &bbnsm->keycode)) {
>
> But of_property_read_u32() is still used
Sorry, it is my fault, will fix it.
>
> > + bbnsm->keycode = KEY_POWER;
> > + dev_warn(&pdev->dev, "KEY_POWER without setting in dts\n");
> > + }
> > +
> > + bbnsm->irq = platform_get_irq(pdev, 0);
> > + if (bbnsm->irq < 0)
> > + return -EINVAL;
> > +
> > + /* config the BBNSM power related register */
> > + regmap_update_bits(bbnsm->regmap, BBNSM_CTRL, BBNSM_DP_EN,
> > +BBNSM_DP_EN);
> > +
> > + /* clear the unexpected interrupt before driver ready */
> > + regmap_write_bits(bbnsm->regmap, BBNSM_EVENTS,
> BBNSM_PWRKEY_EVENTS,
> > +BBNSM_PWRKEY_EVENTS);
> > +
> > + timer_setup(&bbnsm->check_timer, bbnsm_pwrkey_check_for_events,
> 0);
> > +
> > + input = devm_input_allocate_device(&pdev->dev);
> > + if (!input) {
> > + dev_err(&pdev->dev, "failed to allocate the input device\n");
> > + return -ENOMEM;
> > + }
> > +
> > + input->name = pdev->name;
> > + input->phys = "bbnsm-pwrkey/input0";
> > + input->id.bustype = BUS_HOST;
> > +
> > + input_set_capability(input, EV_KEY, bbnsm->keycode);
> > +
> > + /* input customer action to cancel release timer */
> > + error = devm_add_action(&pdev->dev, bbnsm_pwrkey_act, bbnsm);
> > + if (error) {
> > + dev_err(&pdev->dev, "failed to register remove action\n");
> > + return error;
> > + }
> > +
> > + bbnsm->input = input;
> > + platform_set_drvdata(pdev, bbnsm);
> > +
> > + error = devm_request_irq(&pdev->dev, bbnsm->irq,
> bbnsm_pwrkey_interrupt,
> > + IRQF_SHARED, pdev->name, pdev);
> > + if (error) {
> > + dev_err(&pdev->dev, "interrupt not available.\n");
> > + return error;
> > + }
> > +
> > + error = input_register_device(input);
> > + if (error < 0) {
> > + dev_err(&pdev->dev, "failed to register input device\n");
> > + return error;
> > + }
> > +
> > + device_init_wakeup(&pdev->dev, true);
> > + dev_pm_set_wake_irq(&pdev->dev, bbnsm->irq);
>
> Can we add some error handling here?
> The legacy driver (snvs_pwrkey), which looks a lot like this one, warns whne
> irq wake enabling fails, and so do the other drivers keyboard drivers that call
> dev_pm_set_wake_irq().
>
The error warning removed after v2 based on Alexandre's concern in rtc driver,
I can add a dev_warn in v4. Thx.
BR
Jacky Bai
> > +
> > + return 0;
> > +}
> > +
> > +static const struct of_device_id bbnsm_pwrkey_ids[] = {
> > + { .compatible = "nxp,bbnsm-pwrkey" },
> > + { /* sentinel */ }
> > +};
> > +MODULE_DEVICE_TABLE(of, bbnsm_pwrkey_ids);
> > +
> > +static struct platform_driver bbnsm_pwrkey_driver = {
> > + .driver = {
> > + .name = "bbnsm_pwrkey",
> > + .of_match_table = bbnsm_pwrkey_ids,
> > + },
> > + .probe = bbnsm_pwrkey_probe,
> > +};
> > +module_platform_driver(bbnsm_pwrkey_driver);
> > +
> > +MODULE_AUTHOR("Jacky Bai <ping.bai@xxxxxxx>");
> > +MODULE_DESCRIPTION("NXP bbnsm power key Driver");
> > +MODULE_LICENSE("GPL");
> > --
> > 2.37.1
