[alsa-devel] [PATCH 6/9] power_supply: wm97xx_battery: use power_supply_get_drvdata

[Kevin Hilman]

Hello,

On Wed, Oct 26, 2016 at 12:41 PM, Robert Jarzmik <robert.jarzmik at free.fr> wrote:
> As the power supply framework provides a way to store and retrieve
> private supply data, use it.
>
> In the process, change the platform data for wm97xx_battery from a
> container of a single struct wm97xx_batt_pdata to the direct point to wm97xx_batt_pdata.
>
> Signed-off-by: Robert Jarzmik <robert.jarzmik at free.fr>

kernelci.org has been reporting that the tegra20-iris board has been
failing in -next since next-20161123[1], and also in mainline
v4.10-rc.  I finally took the time to bisect, and it pointed to this
patch.  I verified that reverting $SUBJECT patch[2] on top of
v4.10-rc5 fixes the problem.

Kevin

[1] https://kernelci.org/boot/id/5879a3fe59b5141534f6c3ac/
[2] in mainline as commit: 6480af4915d6 power_supply: wm97xx_battery:
use power_supply_get_drvdata

> ---
>  drivers/input/touchscreen/wm97xx-core.c |  2 +-
>  drivers/power/supply/wm97xx_battery.c   | 25 ++++++++++---------------
>  2 files changed, 11 insertions(+), 16 deletions(-)
>
> diff --git a/drivers/input/touchscreen/wm97xx-core.c b/drivers/input/touchscreen/wm97xx-core.c
> index 90d6be3c26cc..83cf11312fd9 100644
> --- a/drivers/input/touchscreen/wm97xx-core.c
> +++ b/drivers/input/touchscreen/wm97xx-core.c
> @@ -682,7 +682,7 @@ static int wm97xx_probe(struct device *dev)
>         }
>         platform_set_drvdata(wm->battery_dev, wm);
>         wm->battery_dev->dev.parent = dev;
> -       wm->battery_dev->dev.platform_data = pdata;
> +       wm->battery_dev->dev.platform_data = pdata->batt_pdata;
>         ret = platform_device_add(wm->battery_dev);
>         if (ret < 0)
>                 goto batt_reg_err;
> diff --git a/drivers/power/supply/wm97xx_battery.c b/drivers/power/supply/wm97xx_battery.c
> index 6285626d142a..e3edb31ac880 100644
> --- a/drivers/power/supply/wm97xx_battery.c
> +++ b/drivers/power/supply/wm97xx_battery.c
> @@ -30,8 +30,7 @@ static enum power_supply_property *prop;
>
>  static unsigned long wm97xx_read_bat(struct power_supply *bat_ps)
>  {
> -       struct wm97xx_pdata *wmdata = bat_ps->dev.parent->platform_data;
> -       struct wm97xx_batt_pdata *pdata = wmdata->batt_pdata;
> +       struct wm97xx_batt_pdata *pdata = power_supply_get_drvdata(bat_ps);
>
>         return wm97xx_read_aux_adc(dev_get_drvdata(bat_ps->dev.parent),
>                                         pdata->batt_aux) * pdata->batt_mult /
> @@ -40,8 +39,7 @@ static unsigned long wm97xx_read_bat(struct power_supply *bat_ps)
>
>  static unsigned long wm97xx_read_temp(struct power_supply *bat_ps)
>  {
> -       struct wm97xx_pdata *wmdata = bat_ps->dev.parent->platform_data;
> -       struct wm97xx_batt_pdata *pdata = wmdata->batt_pdata;
> +       struct wm97xx_batt_pdata *pdata = power_supply_get_drvdata(bat_ps);
>
>         return wm97xx_read_aux_adc(dev_get_drvdata(bat_ps->dev.parent),
>                                         pdata->temp_aux) * pdata->temp_mult /
> @@ -52,8 +50,7 @@ static int wm97xx_bat_get_property(struct power_supply *bat_ps,
>                             enum power_supply_property psp,
>                             union power_supply_propval *val)
>  {
> -       struct wm97xx_pdata *wmdata = bat_ps->dev.parent->platform_data;
> -       struct wm97xx_batt_pdata *pdata = wmdata->batt_pdata;
> +       struct wm97xx_batt_pdata *pdata = power_supply_get_drvdata(bat_ps);
>
>         switch (psp) {
>         case POWER_SUPPLY_PROP_STATUS:
> @@ -103,8 +100,7 @@ static void wm97xx_bat_external_power_changed(struct power_supply *bat_ps)
>  static void wm97xx_bat_update(struct power_supply *bat_ps)
>  {
>         int old_status = bat_status;
> -       struct wm97xx_pdata *wmdata = bat_ps->dev.parent->platform_data;
> -       struct wm97xx_batt_pdata *pdata = wmdata->batt_pdata;
> +       struct wm97xx_batt_pdata *pdata = power_supply_get_drvdata(bat_ps);
>
>         mutex_lock(&work_lock);
>
> @@ -166,15 +162,15 @@ static int wm97xx_bat_probe(struct platform_device *dev)
>         int ret = 0;
>         int props = 1;  /* POWER_SUPPLY_PROP_PRESENT */
>         int i = 0;
> -       struct wm97xx_pdata *wmdata = dev->dev.platform_data;
> -       struct wm97xx_batt_pdata *pdata;
> +       struct wm97xx_batt_pdata *pdata = dev->dev.platform_data;
> +       struct power_supply_config cfg = {};
>
> -       if (!wmdata) {
> +       if (!pdata) {
>                 dev_err(&dev->dev, "No platform data supplied\n");
>                 return -EINVAL;
>         }
>
> -       pdata = wmdata->batt_pdata;
> +       cfg.drv_data = pdata;
>
>         if (dev->id != -1)
>                 return -EINVAL;
> @@ -243,7 +239,7 @@ static int wm97xx_bat_probe(struct platform_device *dev)
>         bat_psy_desc.properties = prop;
>         bat_psy_desc.num_properties = props;
>
> -       bat_psy = power_supply_register(&dev->dev, &bat_psy_desc, NULL);
> +       bat_psy = power_supply_register(&dev->dev, &bat_psy_desc, &cfg);
>         if (!IS_ERR(bat_psy)) {
>                 schedule_work(&bat_work);
>         } else {
> @@ -266,8 +262,7 @@ static int wm97xx_bat_probe(struct platform_device *dev)
>
>  static int wm97xx_bat_remove(struct platform_device *dev)
>  {
> -       struct wm97xx_pdata *wmdata = dev->dev.platform_data;
> -       struct wm97xx_batt_pdata *pdata = wmdata->batt_pdata;
> +       struct wm97xx_batt_pdata *pdata = dev->dev.platform_data;
>
>         if (pdata && gpio_is_valid(pdata->charge_gpio)) {
>                 free_irq(gpio_to_irq(pdata->charge_gpio), dev);
> --
> 2.1.4
>
> --
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