linux-kernel - Re: [PATCH] ACPI / battery: add quirk for Asus GL502VSK and UX305LA

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Message-ID: <CAAd53p7+EOCQyAPkAtUM306p821bqjK_UnD72KRDVYW9uuu9Cg@mail.gmail.com>
Date:   Thu, 12 Oct 2017 13:16:47 +0800
From:   Kai-Heng Feng <kai.heng.feng@...onical.com>
To:     "Rafael J. Wysocki" <rjw@...ysocki.net>, lenb@...nel.org
Cc:     linux-acpi@...r.kernel.org, LKML <linux-kernel@...r.kernel.org>,
        Kai-Heng Feng <kai.heng.feng@...onical.com>
Subject: Re: [PATCH] ACPI / battery: add quirk for Asus GL502VSK and UX305LA

On Fri, Sep 22, 2017 at 4:27 PM, Kai-Heng Feng
<kai.heng.feng@...onical.com> wrote:
> On Asus GL502VSK and UX305LA, ACPI incorrectly reports discharging when
> battery is full and AC is plugged.
>
> However rate_now is correct under this circumstance, hence we can use
> "rate_now == 0" as a predicate to report battery full status correctly.
>
> BugLink: https://bugs.launchpad.net/bugs/1482390
> Signed-off-by: Kai-Heng Feng <kai.heng.feng@...onical.com>
> ---
>  drivers/acpi/battery.c | 29 ++++++++++++++++++++++++++++-
>  1 file changed, 28 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/acpi/battery.c b/drivers/acpi/battery.c
> index 13e7b56e33ae..f9f008cf3da7 100644
> --- a/drivers/acpi/battery.c
> +++ b/drivers/acpi/battery.c
> @@ -70,6 +70,7 @@ static async_cookie_t async_cookie;
>  static bool battery_driver_registered;
>  static int battery_bix_broken_package;
>  static int battery_notification_delay_ms;
> +static int battery_full_discharging;
>  static unsigned int cache_time = 1000;
>  module_param(cache_time, uint, 0644);
>  MODULE_PARM_DESC(cache_time, "cache time in milliseconds");
> @@ -214,7 +215,10 @@ static int acpi_battery_get_property(struct power_supply *psy,
>                 return -ENODEV;
>         switch (psp) {
>         case POWER_SUPPLY_PROP_STATUS:
> -               if (battery->state & ACPI_BATTERY_STATE_DISCHARGING)
> +               if (battery_full_discharging && battery->rate_now == 0 &&
> +                   battery->state & ACPI_BATTERY_STATE_DISCHARGING)
> +                       val->intval = POWER_SUPPLY_STATUS_FULL;
> +               else if (battery->state & ACPI_BATTERY_STATE_DISCHARGING)
>                         val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
>                 else if (battery->state & ACPI_BATTERY_STATE_CHARGING)
>                         val->intval = POWER_SUPPLY_STATUS_CHARGING;
> @@ -1166,6 +1170,13 @@ battery_notification_delay_quirk(const struct dmi_system_id *d)
>         return 0;
>  }
>
> +static int __init
> +battery_full_discharging_quirk(const struct dmi_system_id *d)
> +{
> +       battery_full_discharging = 1;
> +       return 0;
> +}
> +
>  static const struct dmi_system_id bat_dmi_table[] __initconst = {
>         {
>                 .callback = battery_bix_broken_package_quirk,
> @@ -1183,6 +1194,22 @@ static const struct dmi_system_id bat_dmi_table[] __initconst = {
>                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire V5-573G"),
>                 },
>         },
> +       {
> +               .callback = battery_full_discharging_quirk,
> +               .ident = "ASUS GL502VSK",
> +               .matches = {
> +                       DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
> +                       DMI_MATCH(DMI_PRODUCT_NAME, "GL502VSK"),
> +               },
> +       },
> +       {
> +               .callback = battery_full_discharging_quirk,
> +               .ident = "ASUS UX305LA",
> +               .matches = {
> +                       DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
> +                       DMI_MATCH(DMI_PRODUCT_NAME, "UX305LA"),
> +               },
> +       },
>         {},
>  };
>

Hi,

Is there any improvement I can make for this patch?

> --
> 2.14.1
>