From: "Nícolas F. R. A. Prado" <nfraprado@collabora.com> To: Daniel Lezcano <daniel.lezcano@linaro.org> Cc: "Alexandre Bailon" <abailon@baylibre.com>, "Balsam CHIHI" <bchihi@baylibre.com>, "AngeloGioacchino Del Regno" <angelogioacchino.delregno@collabora.com>, "Chen-Yu Tsai" <wenst@chromium.org>, "Alexandre Mergnat" <amergnat@baylibre.com>, kernel@collabora.com, "Nícolas F. R. A. Prado" <nfraprado@collabora.com>, "Amit Kucheria" <amitk@kernel.org>, "Matthias Brugger" <matthias.bgg@gmail.com>, "Rafael J. Wysocki" <rafael@kernel.org>, "Zhang Rui" <rui.zhang@intel.com>, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-mediatek@lists.infradead.org, linux-pm@vger.kernel.org Subject: [PATCH v3 5/6] thermal/drivers/mediatek/lvts_thermal: Don't leave threshold zeroed Date: Thu, 6 Jul 2023 11:37:36 -0400 [thread overview] Message-ID: <20230706153823.201943-6-nfraprado@collabora.com> (raw) In-Reply-To: <20230706153823.201943-1-nfraprado@collabora.com> The thermal framework might leave the low threshold unset if there aren't any lower trip points. This leaves the register zeroed, which translates to a very high temperature for the low threshold. The interrupt for this threshold is then immediately triggered, and the state machine gets stuck, preventing any other temperature monitoring interrupts to ever trigger. (The same happens by not setting the Cold or Hot to Normal thresholds when using those) Set the unused threshold to a valid low value. This value was chosen so that for any valid golden temperature read from the efuse, when the value is converted to raw and back again to milliCelsius, the result doesn't underflow. Fixes: f5f633b18234 ("thermal/drivers/mediatek: Add the Low Voltage Thermal Sensor driver") Signed-off-by: Nícolas F. R. A. Prado <nfraprado@collabora.com> --- Changes in v3: - Converted MINIMUM_THRESHOLD earlier to eliminate need for extra branch - Fixed typo: MINIUM -> MINIMUM Changes in v2: - Added this commit drivers/thermal/mediatek/lvts_thermal.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) diff --git a/drivers/thermal/mediatek/lvts_thermal.c b/drivers/thermal/mediatek/lvts_thermal.c index e6dd4d120e54..7552e1d59dc9 100644 --- a/drivers/thermal/mediatek/lvts_thermal.c +++ b/drivers/thermal/mediatek/lvts_thermal.c @@ -83,6 +83,8 @@ #define LVTS_HW_SHUTDOWN_MT8195 105000 +#define LVTS_MINIMUM_THRESHOLD 20000 + static int golden_temp = LVTS_GOLDEN_TEMP_DEFAULT; static int coeff_b = LVTS_COEFF_B; @@ -294,7 +296,7 @@ static int lvts_set_trips(struct thermal_zone_device *tz, int low, int high) { struct lvts_sensor *lvts_sensor = thermal_zone_device_priv(tz); void __iomem *base = lvts_sensor->base; - u32 raw_low = lvts_temp_to_raw(low); + u32 raw_low = lvts_temp_to_raw(low != -INT_MAX ? low : LVTS_MINIMUM_THRESHOLD); u32 raw_high = lvts_temp_to_raw(high); /* @@ -306,11 +308,9 @@ static int lvts_set_trips(struct thermal_zone_device *tz, int low, int high) * * 14-0 : Raw temperature for threshold */ - if (low != -INT_MAX) { - pr_debug("%s: Setting low limit temperature interrupt: %d\n", - thermal_zone_device_type(tz), low); - writel(raw_low, LVTS_OFFSETL(base)); - } + pr_debug("%s: Setting low limit temperature interrupt: %d\n", + thermal_zone_device_type(tz), low); + writel(raw_low, LVTS_OFFSETL(base)); /* * High offset temperature threshold -- 2.41.0
WARNING: multiple messages have this Message-ID (diff)
From: "Nícolas F. R. A. Prado" <nfraprado@collabora.com> To: Daniel Lezcano <daniel.lezcano@linaro.org> Cc: "Alexandre Bailon" <abailon@baylibre.com>, "Balsam CHIHI" <bchihi@baylibre.com>, "AngeloGioacchino Del Regno" <angelogioacchino.delregno@collabora.com>, "Chen-Yu Tsai" <wenst@chromium.org>, "Alexandre Mergnat" <amergnat@baylibre.com>, kernel@collabora.com, "Nícolas F. R. A. Prado" <nfraprado@collabora.com>, "Amit Kucheria" <amitk@kernel.org>, "Matthias Brugger" <matthias.bgg@gmail.com>, "Rafael J. Wysocki" <rafael@kernel.org>, "Zhang Rui" <rui.zhang@intel.com>, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-mediatek@lists.infradead.org, linux-pm@vger.kernel.org Subject: [PATCH v3 5/6] thermal/drivers/mediatek/lvts_thermal: Don't leave threshold zeroed Date: Thu, 6 Jul 2023 11:37:36 -0400 [thread overview] Message-ID: <20230706153823.201943-6-nfraprado@collabora.com> (raw) In-Reply-To: <20230706153823.201943-1-nfraprado@collabora.com> The thermal framework might leave the low threshold unset if there aren't any lower trip points. This leaves the register zeroed, which translates to a very high temperature for the low threshold. The interrupt for this threshold is then immediately triggered, and the state machine gets stuck, preventing any other temperature monitoring interrupts to ever trigger. (The same happens by not setting the Cold or Hot to Normal thresholds when using those) Set the unused threshold to a valid low value. This value was chosen so that for any valid golden temperature read from the efuse, when the value is converted to raw and back again to milliCelsius, the result doesn't underflow. Fixes: f5f633b18234 ("thermal/drivers/mediatek: Add the Low Voltage Thermal Sensor driver") Signed-off-by: Nícolas F. R. A. Prado <nfraprado@collabora.com> --- Changes in v3: - Converted MINIMUM_THRESHOLD earlier to eliminate need for extra branch - Fixed typo: MINIUM -> MINIMUM Changes in v2: - Added this commit drivers/thermal/mediatek/lvts_thermal.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) diff --git a/drivers/thermal/mediatek/lvts_thermal.c b/drivers/thermal/mediatek/lvts_thermal.c index e6dd4d120e54..7552e1d59dc9 100644 --- a/drivers/thermal/mediatek/lvts_thermal.c +++ b/drivers/thermal/mediatek/lvts_thermal.c @@ -83,6 +83,8 @@ #define LVTS_HW_SHUTDOWN_MT8195 105000 +#define LVTS_MINIMUM_THRESHOLD 20000 + static int golden_temp = LVTS_GOLDEN_TEMP_DEFAULT; static int coeff_b = LVTS_COEFF_B; @@ -294,7 +296,7 @@ static int lvts_set_trips(struct thermal_zone_device *tz, int low, int high) { struct lvts_sensor *lvts_sensor = thermal_zone_device_priv(tz); void __iomem *base = lvts_sensor->base; - u32 raw_low = lvts_temp_to_raw(low); + u32 raw_low = lvts_temp_to_raw(low != -INT_MAX ? low : LVTS_MINIMUM_THRESHOLD); u32 raw_high = lvts_temp_to_raw(high); /* @@ -306,11 +308,9 @@ static int lvts_set_trips(struct thermal_zone_device *tz, int low, int high) * * 14-0 : Raw temperature for threshold */ - if (low != -INT_MAX) { - pr_debug("%s: Setting low limit temperature interrupt: %d\n", - thermal_zone_device_type(tz), low); - writel(raw_low, LVTS_OFFSETL(base)); - } + pr_debug("%s: Setting low limit temperature interrupt: %d\n", + thermal_zone_device_type(tz), low); + writel(raw_low, LVTS_OFFSETL(base)); /* * High offset temperature threshold -- 2.41.0 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2023-07-06 15:39 UTC|newest] Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top 2023-07-06 15:37 [PATCH v3 0/6] thermal/drivers/mediatek/lvts_thermal: Fixes to the interrupt handling Nícolas F. R. A. Prado 2023-07-06 15:37 ` Nícolas F. R. A. Prado 2023-07-06 15:37 ` [PATCH v3 1/6] thermal/drivers/mediatek/lvts_thermal: Handle IRQ on all controllers Nícolas F. R. A. Prado 2023-07-06 15:37 ` Nícolas F. R. A. Prado 2023-07-07 13:46 ` Alexandre Mergnat 2023-07-07 13:46 ` Alexandre Mergnat 2023-07-06 15:37 ` [PATCH v3 2/6] thermal/drivers/mediatek/lvts_thermal: Honor sensors in immediate mode Nícolas F. R. A. Prado 2023-07-06 15:37 ` Nícolas F. R. A. Prado 2023-07-07 13:50 ` Alexandre Mergnat 2023-07-07 13:50 ` Alexandre Mergnat 2023-07-06 15:37 ` [PATCH v3 3/6] thermal/drivers/mediatek/lvts_thermal: Use offset threshold for IRQ Nícolas F. R. A. Prado 2023-07-06 15:37 ` Nícolas F. R. A. Prado 2023-07-07 8:21 ` AngeloGioacchino Del Regno 2023-07-07 8:21 ` AngeloGioacchino Del Regno 2023-07-07 13:54 ` Alexandre Mergnat 2023-07-07 13:54 ` Alexandre Mergnat 2023-07-06 15:37 ` [PATCH v3 4/6] thermal/drivers/mediatek/lvts_thermal: Disable undesired interrupts Nícolas F. R. A. Prado 2023-07-06 15:37 ` Nícolas F. R. A. Prado 2023-07-07 8:21 ` AngeloGioacchino Del Regno 2023-07-07 8:21 ` AngeloGioacchino Del Regno 2023-07-07 13:58 ` Alexandre Mergnat 2023-07-07 13:58 ` Alexandre Mergnat 2023-07-06 15:37 ` Nícolas F. R. A. Prado [this message] 2023-07-06 15:37 ` [PATCH v3 5/6] thermal/drivers/mediatek/lvts_thermal: Don't leave threshold zeroed Nícolas F. R. A. Prado 2023-07-07 8:22 ` AngeloGioacchino Del Regno 2023-07-07 8:22 ` AngeloGioacchino Del Regno 2023-07-07 14:05 ` Alexandre Mergnat 2023-07-07 14:05 ` Alexandre Mergnat 2023-07-06 15:37 ` [PATCH v3 6/6] thermal/drivers/mediatek/lvts_thermal: Manage threshold between sensors Nícolas F. R. A. Prado 2023-07-06 15:37 ` Nícolas F. R. A. Prado 2023-07-07 8:22 ` AngeloGioacchino Del Regno 2023-07-07 8:22 ` AngeloGioacchino Del Regno 2023-07-07 14:11 ` Alexandre Mergnat 2023-07-07 14:11 ` Alexandre Mergnat 2023-07-13 9:04 ` [PATCH v3 0/6] thermal/drivers/mediatek/lvts_thermal: Fixes to the interrupt handling Daniel Lezcano 2023-07-13 9:04 ` Daniel Lezcano
Reply instructions: You may reply publicly to this message via plain-text email using any one of the following methods: * Save the following mbox file, import it into your mail client, and reply-to-all from there: mbox Avoid top-posting and favor interleaved quoting: https://en.wikipedia.org/wiki/Posting_style#Interleaved_style * Reply using the --to, --cc, and --in-reply-to switches of git-send-email(1): git send-email \ --in-reply-to=20230706153823.201943-6-nfraprado@collabora.com \ --to=nfraprado@collabora.com \ --cc=abailon@baylibre.com \ --cc=amergnat@baylibre.com \ --cc=amitk@kernel.org \ --cc=angelogioacchino.delregno@collabora.com \ --cc=bchihi@baylibre.com \ --cc=daniel.lezcano@linaro.org \ --cc=kernel@collabora.com \ --cc=linux-arm-kernel@lists.infradead.org \ --cc=linux-kernel@vger.kernel.org \ --cc=linux-mediatek@lists.infradead.org \ --cc=linux-pm@vger.kernel.org \ --cc=matthias.bgg@gmail.com \ --cc=rafael@kernel.org \ --cc=rui.zhang@intel.com \ --cc=wenst@chromium.org \ /path/to/YOUR_REPLY https://kernel.org/pub/software/scm/git/docs/git-send-email.html * If your mail client supports setting the In-Reply-To header via mailto: links, try the mailto: linkBe sure your reply has a Subject: header at the top and a blank line before the message body.
This is an external index of several public inboxes, see mirroring instructions on how to clone and mirror all data and code used by this external index.