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[2001:b400:e33c:d873:100e:5074:5ce5:37a1]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-2dd2ce959b3sm60562575ad.22.2026.09.14.22.20.36 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 14 Sep 2026 22:20:40 -0700 (PDT) From: hsyemail2@gmail.com X-Google-Original-From: syhuang3@nuvoton.com To: Guenter Roeck , linux-hwmon@vger.kernel.org Cc: Sheng-Yuan Huang , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Jonathan Corbet , Shuah Khan , Jean Delvare , devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org Subject: [PATCH v3] hwmon: (lm75) Add support for Nuvoton NCT7715 Date: Tue, 15 Sep 2026 13:20:20 +0800 Message-ID: <20260915052021.6959-1-syhuang3@nuvoton.com> X-Mailer: git-send-email 2.43.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Sheng-Yuan Huang The Nuvoton NCT7715 is compatible with the LM75 temperature and limit register layout. Its 16-bit configuration register shares the TMP112 configuration layout. Signed-off-by: Sheng-Yuan Huang --- v3: - Reuse the existing TMP112 handling for NCT7715 configuration, update intervals, and alarms. v2: - Use the standard SMBus word representation for the NCT7715 configuration register, removing the NCT7715-specific byte swapping and updating its configuration masks accordingly. =20 .../devicetree/bindings/hwmon/lm75.yaml | 2 ++ Documentation/hwmon/lm75.rst | 6 ++++++ drivers/hwmon/lm75.c | 21 ++++++++++++++++++- 3 files changed, 28 insertions(+), 1 deletion(-) diff --git a/Documentation/devicetree/bindings/hwmon/lm75.yaml b/Documentat= ion/devicetree/bindings/hwmon/lm75.yaml index b48bf3fd721f..d55b8b7e49c5 100644 --- a/Documentation/devicetree/bindings/hwmon/lm75.yaml +++ b/Documentation/devicetree/bindings/hwmon/lm75.yaml @@ -31,6 +31,7 @@ properties: - nxp,p3t1750 - nxp,p3t1755 - nxp,pct2075 + - nuvoton,nct7715 - st,stds75 - st,stlm75 - microchip,tcn75 @@ -78,6 +79,7 @@ allOf: - ti,tmp101 - ti,tmp112 - ti,tmp75 + - nuvoton,nct7715 then: properties: interrupts: false diff --git a/Documentation/hwmon/lm75.rst b/Documentation/hwmon/lm75.rst index ca46754e028b..fac0b8f29ddc 100644 --- a/Documentation/hwmon/lm75.rst +++ b/Documentation/hwmon/lm75.rst @@ -150,6 +150,12 @@ Supported chips: =20 https://ams.com/documents/20143/36005/AS6200_DS000449_4-00.= pdf =20 + * Nuvoton NCT7715 + + Prefix: 'nct7715' + + Addresses scanned: none + Author: Frodo Looijaard =20 Description diff --git a/drivers/hwmon/lm75.c b/drivers/hwmon/lm75.c index 2d2d752aeac9..1a98ecb142c9 100644 --- a/drivers/hwmon/lm75.c +++ b/drivers/hwmon/lm75.c @@ -39,6 +39,7 @@ enum lm75_type { /* keep sorted in alphabetical order */ max6626, max31725, mcp980x, + nct7715, p3t1750, p3t1755, pct2075, @@ -259,6 +260,16 @@ static const struct lm75_params device_params[] =3D { .sample_times =3D (unsigned int []){ 30, 60, 120, 240 }, .resolutions =3D (u8 []) {9, 10, 11, 12 }, }, + [nct7715] =3D { + .config_reg_16bits =3D true, + .set_mask =3D 0x8060, /* 12-bit mode, 4 samples / second */ + .clr_mask =3D 1 << 7, /* no one-shot mode */ + .default_resolution =3D 12, + .default_sample_time =3D 250, + .num_sample_times =3D 4, + .sample_times =3D (unsigned int []){ 125, 250, 1000, 4000 }, + .alarm =3D true, + }, [tmp100] =3D { .set_mask =3D 3 << 5, /* 12-bit mode */ .clr_mask =3D 1 << 7, /* not one-shot mode */ @@ -417,6 +428,7 @@ static int lm75_read(struct device *dev, enum hwmon_sen= sor_types type, if (attr =3D=3D hwmon_temp_alarm) { switch (data->kind) { case as6200: + case nct7715: case tmp112: *val =3D !!(regval & BIT(13)) =3D=3D !!(regval & BIT(2)); break; @@ -486,6 +498,7 @@ static int lm75_update_interval(struct device *dev, lon= g val) if (data->params->resolutions) data->resolution =3D data->params->resolutions[index]; break; + case nct7715: case tmp112: case as6200: err =3D regmap_update_bits(data->regmap, LM75_REG_CONF, @@ -848,6 +861,7 @@ static const struct i2c_device_id lm75_i2c_ids[] =3D { { .name =3D "max31725", .driver_data =3D max31725 }, { .name =3D "max31726", .driver_data =3D max31725 }, { .name =3D "mcp980x", .driver_data =3D mcp980x }, + { .name =3D "nct7715", .driver_data =3D nct7715 }, { .name =3D "p3t1750", .driver_data =3D p3t1750 }, { .name =3D "p3t1755", .driver_data =3D p3t1755 }, { .name =3D "pct2075", .driver_data =3D pct2075 }, @@ -972,6 +986,10 @@ static const struct of_device_id lm75_of_match[] =3D { .compatible =3D "nxp,pct2075", .data =3D (void *)pct2075 }, + { + .compatible =3D "nuvoton,nct7715", + .data =3D (void *)nct7715 + }, { .compatible =3D "st,stds75", .data =3D (void *)stds75 @@ -1129,7 +1147,8 @@ static int lm75_suspend(struct device *dev) { struct lm75_data *data =3D dev_get_drvdata(dev); =20 - return regmap_update_bits(data->regmap, LM75_REG_CONF, LM75_SHUTDOWN, LM7= 5_SHUTDOWN); + return regmap_update_bits(data->regmap, LM75_REG_CONF, + LM75_SHUTDOWN, LM75_SHUTDOWN); } =20 static int lm75_resume(struct device *dev) --=20 2.43.0