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[2001:b400:e35f:d966:bfea:f724:5ada:7374]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-39e5a50d332sm2093716a91.9.2026.09.18.01.41.16 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 18 Sep 2026 01:41:18 -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 , Jonathan Corbet , Shuah Khan , linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v4 2/2] hwmon: (lm75) Add support for Nuvoton NCT7715 Date: Fri, 18 Sep 2026 16:40:41 +0800 Message-ID: <20260918084042.19541-3-syhuang3@nuvoton.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260918084042.19541-1-syhuang3@nuvoton.com> References: <20260918084042.19541-1-syhuang3@nuvoton.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 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 --- v4: - Correct NCT7715 conversion-rate initialization during probe. 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. Documentation/hwmon/lm75.rst | 6 ++++++ drivers/hwmon/lm75.c | 18 ++++++++++++++++++ 2 files changed, 24 insertions(+) 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: https://ams.com/documents/20143/36005/AS6200_DS000449_4-00.pdf + * Nuvoton NCT7715 + + Prefix: 'nct7715' + + Addresses scanned: none + Author: Frodo Looijaard Description diff --git a/drivers/hwmon/lm75.c b/drivers/hwmon/lm75.c index 2d2d752aeac9..6b482f688c9f 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[] = { .sample_times = (unsigned int []){ 30, 60, 120, 240 }, .resolutions = (u8 []) {9, 10, 11, 12 }, }, + [nct7715] = { + .config_reg_16bits = true, + .set_mask = 0x8060, /* 12-bit mode, 4 samples / second */ + .clr_mask = 0xc080, /* no one-shot mode, clear conversion rate */ + .default_resolution = 12, + .default_sample_time = 250, + .num_sample_times = 4, + .sample_times = (unsigned int []){ 125, 250, 1000, 4000 }, + .alarm = true, + }, [tmp100] = { .set_mask = 3 << 5, /* 12-bit mode */ .clr_mask = 1 << 7, /* not one-shot mode */ @@ -417,6 +428,7 @@ static int lm75_read(struct device *dev, enum hwmon_sensor_types type, if (attr == hwmon_temp_alarm) { switch (data->kind) { case as6200: + case nct7715: case tmp112: *val = !!(regval & BIT(13)) == !!(regval & BIT(2)); break; @@ -486,6 +498,7 @@ static int lm75_update_interval(struct device *dev, long val) if (data->params->resolutions) data->resolution = data->params->resolutions[index]; break; + case nct7715: case tmp112: case as6200: err = regmap_update_bits(data->regmap, LM75_REG_CONF, @@ -848,6 +861,7 @@ static const struct i2c_device_id lm75_i2c_ids[] = { { .name = "max31725", .driver_data = max31725 }, { .name = "max31726", .driver_data = max31725 }, { .name = "mcp980x", .driver_data = mcp980x }, + { .name = "nct7715", .driver_data = nct7715 }, { .name = "p3t1750", .driver_data = p3t1750 }, { .name = "p3t1755", .driver_data = p3t1755 }, { .name = "pct2075", .driver_data = pct2075 }, @@ -972,6 +986,10 @@ static const struct of_device_id lm75_of_match[] = { .compatible = "nxp,pct2075", .data = (void *)pct2075 }, + { + .compatible = "nuvoton,nct7715", + .data = (void *)nct7715 + }, { .compatible = "st,stds75", .data = (void *)stds75 -- 2.43.0