On Fri, Jul 13, 2018 at 6:31 PM Geert Uytterhoeven
<geert+renesas@xxxxxxxxx> wrote:
> Currently the BD9571MWV PMIC driver uses the standard "wake_up" sysfs
> file to control enablement of DDR Backup Mode.
>
> However, configuring DDR Backup Mode is not really equivalent to
> configuring the PMIC as a wake-up source. To avoid confusion, use a
> custom "backup_mode" attribute file in sysfs instead.
>
> Signed-off-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>
> ---
> v3:
> - New.
> ---
> drivers/regulator/bd9571mwv-regulator.c | 52 ++++++++++++++++++++++---
> 1 file changed, 46 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/regulator/bd9571mwv-regulator.c b/drivers/regulator/bd9571mwv-regulator.c
> index be574eb444ebda97..7432b605db4dc879 100644
> --- a/drivers/regulator/bd9571mwv-regulator.c
> +++ b/drivers/regulator/bd9571mwv-regulator.c
> @@ -270,15 +298,26 @@ static int bd9571mwv_regulator_probe(struct platform_device *pdev)
> return -EINVAL;
> }
>
> +#ifdef CONFIG_PM_SLEEP
> if (bdreg->bkup_mode_cnt_keepon) {
> - device_set_wakeup_capable(&pdev->dev, true);
> /*
> - * Wakeup is enabled by default in pulse mode, but needs
> + * Backup mode is enabled by default in pulse mode, but needs
> * explicit user setup in level mode.
> */
> - device_set_wakeup_enable(&pdev->dev, bdreg->rstbmode_pulse);
> + bdreg->bkup_mode_enabled = bdreg->rstbmode_pulse;
> +
> + ret = device_create_file(&pdev->dev, &dev_attr_backup_mode);
> + if (ret)
> + return ret;
> }
> +#endif /* CONFIG_PM_SLEEP */
> +
> + return 0;
> +}
>
> +static int bd9571mwv_regulator_remove(struct platform_device *pdev)
> +{
> + device_remove_file(&pdev->dev, &dev_attr_backup_mode);
Woops, this line needs to be protected by CONFIG_PM_SLEEP.
Thank you, 0-day!
> return 0;
> }
>
> @@ -294,6 +333,7 @@ static struct platform_driver bd9571mwv_regulator_driver = {
> .pm = DEV_PM_OPS,
> },
> .probe = bd9571mwv_regulator_probe,
> + .remove = bd9571mwv_regulator_remove,
> .id_table = bd9571mwv_regulator_id_table,
> };
> module_platform_driver(bd9571mwv_regulator_driver);
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
