From: Bjorn Andersson <bjorn.andersson@linaro.org>
To: Amit Kucheria <amit.kucheria@linaro.org>
Cc: linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org,
swboyd@chromium.org, sivaa@codeaurora.org,
Andy Gross <agross@kernel.org>,
Amit Kucheria <amit.kucheria@verdurent.com>,
linux-pm@vger.kernel.org
Subject: Re: [PATCH v4 5/7] drivers: thermal: tsens: Add watchdog support
Date: Mon, 3 Feb 2020 10:42:13 -0800 [thread overview]
Message-ID: <20200203184213.GG3948@builder> (raw)
In-Reply-To: <a1f7d34b7281c4e40307f67fce9a5c435ee5e7eb.1580390127.git.amit.kucheria@linaro.org>
On Thu 30 Jan 05:27 PST 2020, Amit Kucheria wrote:
> TSENS IP v2.3 onwards adds support for a watchdog to detect if the TSENS
> HW FSM is stuck. Add support to detect and restart the FSM in the
> driver. The watchdog is configured by the bootloader, we just enable the
> watchdog bark as a debug feature in the kernel.
>
> Signed-off-by: Amit Kucheria <amit.kucheria@linaro.org>
> ---
> drivers/thermal/qcom/tsens-common.c | 43 +++++++++++++++++++++++++++++
> drivers/thermal/qcom/tsens-v2.c | 10 +++++++
> drivers/thermal/qcom/tsens.h | 14 ++++++++++
> 3 files changed, 67 insertions(+)
>
> diff --git a/drivers/thermal/qcom/tsens-common.c b/drivers/thermal/qcom/tsens-common.c
> index 9d1594d2f1ed..ee2414f33606 100644
> --- a/drivers/thermal/qcom/tsens-common.c
> +++ b/drivers/thermal/qcom/tsens-common.c
> @@ -377,6 +377,26 @@ irqreturn_t tsens_critical_irq_thread(int irq, void *data)
> struct tsens_irq_data d;
> unsigned long flags;
> int temp, ret, i;
> + u32 wdog_status, wdog_count;
> +
> + if (priv->feat->has_watchdog) {
> + ret = regmap_field_read(priv->rf[WDOG_BARK_STATUS], &wdog_status);
> + if (ret)
> + return ret;
> +
> + if (wdog_status) {
> + /* Clear WDOG interrupt */
> + regmap_field_write(priv->rf[WDOG_BARK_CLEAR], 1);
> + regmap_field_write(priv->rf[WDOG_BARK_CLEAR], 0);
> + ret = regmap_field_read(priv->rf[WDOG_BARK_COUNT], &wdog_count);
> + if (ret)
> + return ret;
> + if (wdog_count)
> + dev_dbg(priv->dev, "%s: watchdog count: %d\n", __func__, wdog_count);
> +
> + return IRQ_HANDLED;
Patch looks good, but would is make sense to fall through and handle
critical interrupts as well (both in positive and error cases of this
hunk)?
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Regards,
Bjorn
next prev parent reply other threads:[~2020-02-03 18:42 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-30 13:27 [PATCH v4 0/7] thermal: tsens: Handle critical interrupts Amit Kucheria
2020-01-30 13:27 ` [PATCH v4 1/7] drivers: thermal: tsens: Pass around struct tsens_sensor as a constant Amit Kucheria
2020-01-30 13:27 ` [PATCH v4 2/7] drivers: thermal: tsens: use simpler variables Amit Kucheria
2020-01-30 13:27 ` [PATCH v4 3/7] drivers: thermal: tsens: Release device in success path Amit Kucheria
2020-02-03 18:05 ` Bjorn Andersson
2020-01-30 13:27 ` [PATCH v4 4/7] drivers: thermal: tsens: Add critical interrupt support Amit Kucheria
2020-02-03 18:14 ` Bjorn Andersson
2020-02-18 18:08 ` Amit Kucheria
2020-01-30 13:27 ` [PATCH v4 5/7] drivers: thermal: tsens: Add watchdog support Amit Kucheria
2020-02-03 18:42 ` Bjorn Andersson [this message]
2020-02-18 18:08 ` Amit Kucheria
2020-01-30 13:27 ` [PATCH v4 6/7] drivers: thermal: tsens: kernel-doc fixup Amit Kucheria
2020-02-03 18:43 ` Bjorn Andersson
2020-01-30 13:27 ` [PATCH v4 7/7] drivers: thermal: tsens: Remove unnecessary irq flag Amit Kucheria
2020-02-03 18:44 ` Bjorn Andersson
2020-02-17 15:25 ` [PATCH v4 0/7] thermal: tsens: Handle critical interrupts Daniel Lezcano
2020-02-18 5:36 ` Amit Kucheria
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