Quoting Amit Kucheria (2019-11-11 11:21:28)
> TSENS IP v2.3 onwards adds support for a watchdog to detect if the TSENS
> HW FSM is frozen. Add support to detect and restart the FSM in the
Maybe 'frozen' is an ambiguous term? Maybe 'stuck' or 'has stopped
making progress'?
> driver. The watchdog is configured by the bootloader, we just enable the
> feature in the kernel.
Does it work to enable it if we don't configure it in the bootloader?
>
> Signed-off-by: Amit Kucheria <amit.kucheria@xxxxxxxxxx>
> ---
> drivers/thermal/qcom/tsens-common.c | 41 +++++++++++++++++++++++++++++
> drivers/thermal/qcom/tsens-v2.c | 10 +++++++
> drivers/thermal/qcom/tsens.h | 12 +++++++++
> 3 files changed, 63 insertions(+)
>
> diff --git a/drivers/thermal/qcom/tsens-common.c b/drivers/thermal/qcom/tsens-common.c
> index 2989cb952cdb..9432518502a7 100644
> --- a/drivers/thermal/qcom/tsens-common.c
> +++ b/drivers/thermal/qcom/tsens-common.c
> @@ -794,6 +820,21 @@ int __init init_common(struct tsens_priv *priv)
> }
> }
>
> + if (tsens_version(priv) > VER_1_X && ver_minor > 2) {
> + /* Watchdog is present only on v2.3+ */
> + for (i = 0, j = WDOG_BARK_STATUS; j <= CC_MON_MASK; i++, j++) {
The variable 'i' is not actually used in this loop. What's going on?
> + priv->rf[j] = devm_regmap_field_alloc(dev, priv->tm_map,
> + priv->fields[j]);
> + if (IS_ERR(priv->rf[j])) {
> + ret = PTR_ERR(priv->rf[j]);
> + goto err_put_device;
> + }
> + }
> + /* Enable WDOG and disable cycle completion monitoring */
> + regmap_field_write(priv->rf[WDOG_BARK_MASK], 0);
> + regmap_field_write(priv->rf[CC_MON_MASK], 1);
> + }
