All of lore.kernel.org
 help / color / mirror / Atom feed
From: Marcus Folkesson <marcus.folkesson@gmail.com>
To: "Rafael J . Wysocki" <rafael@kernel.org>,
	Daniel Lezcano <daniel.lezcano@linaro.org>,
	Amit Kucheria <amitk@kernel.org>, Zhang Rui <rui.zhang@intel.com>,
	Shawn Guo <shawnguo@kernel.org>,
	Sascha Hauer <s.hauer@pengutronix.de>,
	Pengutronix Kernel Team <kernel@pengutronix.de>,
	Fabio Estevam <festevam@gmail.com>,
	NXP Linux Team <linux-imx@nxp.com>,
	Anson Huang <Anson.Huang@nxp.com>
Cc: linux-pm@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org,
	Marcus Folkesson <marcus.folkesson@gmail.com>
Subject: [PATCH v3] thermal: imx8mm_thermal: validate temperature range
Date: Fri, 14 Oct 2022 09:35:07 +0200	[thread overview]
Message-ID: <20221014073507.1594844-1-marcus.folkesson@gmail.com> (raw)

Check against the upper temperature limit (125 degrees C) before
consider the temperature valid.

Fixes: 5eed800a6811 ("thermal: imx8mm: Add support for i.MX8MM thermal monitoring unit")
Signed-off-by: Marcus Folkesson <marcus.folkesson@gmail.com>
---

Notes:
    v2: Also invalidate if temperature > max (125 degrees C)
    v3: Only check temperature range as the valid bit is invalid.

 drivers/thermal/imx8mm_thermal.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/drivers/thermal/imx8mm_thermal.c b/drivers/thermal/imx8mm_thermal.c
index af666bd9e8d4..c5cd873c6e01 100644
--- a/drivers/thermal/imx8mm_thermal.c
+++ b/drivers/thermal/imx8mm_thermal.c
@@ -65,8 +65,14 @@ static int imx8mm_tmu_get_temp(void *data, int *temp)
 	u32 val;
 
 	val = readl_relaxed(tmu->base + TRITSR) & TRITSR_TEMP0_VAL_MASK;
+
+	/*
+	 * Do not validate against the V bit (bit 31) due to errata
+	 * ERR051272: TMU: Bit 31 of registers TMU_TSCR/TMU_TRITSR/TMU_TRATSR invalid
+	 */
+
 	*temp = val * 1000;
-	if (*temp < VER1_TEMP_LOW_LIMIT)
+	if (*temp < VER1_TEMP_LOW_LIMIT || *temp > VER2_TEMP_HIGH_LIMIT)
 		return -EAGAIN;
 
 	return 0;
-- 
2.37.1


WARNING: multiple messages have this Message-ID (diff)
From: Marcus Folkesson <marcus.folkesson@gmail.com>
To: "Rafael J . Wysocki" <rafael@kernel.org>,
	Daniel Lezcano <daniel.lezcano@linaro.org>,
	Amit Kucheria <amitk@kernel.org>, Zhang Rui <rui.zhang@intel.com>,
	Shawn Guo <shawnguo@kernel.org>,
	Sascha Hauer <s.hauer@pengutronix.de>,
	Pengutronix Kernel Team <kernel@pengutronix.de>,
	Fabio Estevam <festevam@gmail.com>,
	NXP Linux Team <linux-imx@nxp.com>,
	Anson Huang <Anson.Huang@nxp.com>
Cc: linux-pm@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org,
	Marcus Folkesson <marcus.folkesson@gmail.com>
Subject: [PATCH v3] thermal: imx8mm_thermal: validate temperature range
Date: Fri, 14 Oct 2022 09:35:07 +0200	[thread overview]
Message-ID: <20221014073507.1594844-1-marcus.folkesson@gmail.com> (raw)

Check against the upper temperature limit (125 degrees C) before
consider the temperature valid.

Fixes: 5eed800a6811 ("thermal: imx8mm: Add support for i.MX8MM thermal monitoring unit")
Signed-off-by: Marcus Folkesson <marcus.folkesson@gmail.com>
---

Notes:
    v2: Also invalidate if temperature > max (125 degrees C)
    v3: Only check temperature range as the valid bit is invalid.

 drivers/thermal/imx8mm_thermal.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/drivers/thermal/imx8mm_thermal.c b/drivers/thermal/imx8mm_thermal.c
index af666bd9e8d4..c5cd873c6e01 100644
--- a/drivers/thermal/imx8mm_thermal.c
+++ b/drivers/thermal/imx8mm_thermal.c
@@ -65,8 +65,14 @@ static int imx8mm_tmu_get_temp(void *data, int *temp)
 	u32 val;
 
 	val = readl_relaxed(tmu->base + TRITSR) & TRITSR_TEMP0_VAL_MASK;
+
+	/*
+	 * Do not validate against the V bit (bit 31) due to errata
+	 * ERR051272: TMU: Bit 31 of registers TMU_TSCR/TMU_TRITSR/TMU_TRATSR invalid
+	 */
+
 	*temp = val * 1000;
-	if (*temp < VER1_TEMP_LOW_LIMIT)
+	if (*temp < VER1_TEMP_LOW_LIMIT || *temp > VER2_TEMP_HIGH_LIMIT)
 		return -EAGAIN;
 
 	return 0;
-- 
2.37.1


_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

             reply	other threads:[~2022-10-14  7:35 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-10-14  7:35 Marcus Folkesson [this message]
2022-10-14  7:35 ` [PATCH v3] thermal: imx8mm_thermal: validate temperature range Marcus Folkesson
2022-10-14  7:56 ` Jacky Bai
2022-10-14  7:56   ` Jacky Bai
2022-10-17  7:25 ` Daniel Lezcano
2022-10-17  7:25   ` Daniel Lezcano
2022-10-17  8:06 ` Peng Fan
2022-10-17  8:06   ` Peng Fan
2022-12-09 15:26 ` [thermal: thermal/next] thermal/drivers/imx8mm_thermal: Validate " thermal-bot for Marcus Folkesson

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=20221014073507.1594844-1-marcus.folkesson@gmail.com \
    --to=marcus.folkesson@gmail.com \
    --cc=Anson.Huang@nxp.com \
    --cc=amitk@kernel.org \
    --cc=daniel.lezcano@linaro.org \
    --cc=festevam@gmail.com \
    --cc=kernel@pengutronix.de \
    --cc=linux-arm-kernel@lists.infradead.org \
    --cc=linux-imx@nxp.com \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-pm@vger.kernel.org \
    --cc=rafael@kernel.org \
    --cc=rui.zhang@intel.com \
    --cc=s.hauer@pengutronix.de \
    --cc=shawnguo@kernel.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: link
Be 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.