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([46.10.240.40]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-43796a5d156sm35757690f8f.5.2026.02.17.00.12.09 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 17 Feb 2026 00:12:10 -0800 (PST) From: Stoyan Bogdanov To: jbrunet@baylibre.com, linux@roeck-us.net, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, corbet@lwn.net, skhan@linuxfoundation.org Cc: linux-hwmon@vger.kernel.org, devicetree@vger.kernel.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, Stoyan Bogdanov Subject: [PATCH v3 1/3] hwmon: (pmbus/tps25990): Rework TPS25990 non standatd direct conversion Date: Tue, 17 Feb 2026 10:12:01 +0200 Message-Id: <20260217081203.1792025-2-sbogdanov@baylibre.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20260217081203.1792025-1-sbogdanov@baylibre.com> References: <20260217081203.1792025-1-sbogdanov@baylibre.com> 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" Rework existing implementation for calculation of direct format conversion for TPS25990. With this implamentation is leveraged code reusability for non standard parameters. - Add enum for parameter - Add m, b, R structure to hold value per device - Add data structure to hold for pmbus_driver_info and local_direct_values - Conversion functions are implemented according to formula from TPS25990 datasheet - Remove previously used defines replace with structure Signed-off-by: Stoyan Bogdanov --- drivers/hwmon/pmbus/tps25990.c | 115 +++++++++++++++++++++++++-------- 1 file changed, 88 insertions(+), 27 deletions(-) diff --git a/drivers/hwmon/pmbus/tps25990.c b/drivers/hwmon/pmbus/tps25990.c index c13edd7e1abf..33f6367f797c 100644 --- a/drivers/hwmon/pmbus/tps25990.c +++ b/drivers/hwmon/pmbus/tps25990.c @@ -36,17 +36,58 @@ #define TPS25990_UNLOCKED BIT(7) =20 #define TPS25990_8B_SHIFT 2 -#define TPS25990_VIN_OVF_NUM 525100 -#define TPS25990_VIN_OVF_DIV 10163 -#define TPS25990_VIN_OVF_OFF 155 -#define TPS25990_IIN_OCF_NUM 953800 -#define TPS25990_IIN_OCF_DIV 129278 -#define TPS25990_IIN_OCF_OFF 157 =20 #define PK_MIN_AVG_RST_MASK (PK_MIN_AVG_RST_PEAK | \ PK_MIN_AVG_RST_AVG | \ PK_MIN_AVG_RST_MIN) =20 +enum tps25990_parameters { + TPS25990_VIN_OVF =3D 0, /* VIN over volatage fault */ + TPS25990_IIN_OCF, /* IIN Over currect fault */ + TPS25590_DIRECT_VALUES_MAX, /* Max value ensure there enough space */ +}; + +struct local_direct_value { + int m[TPS25590_DIRECT_VALUES_MAX]; /* mantissa for direct data format */ + int b[TPS25590_DIRECT_VALUES_MAX]; /* offset */ + int R[TPS25590_DIRECT_VALUES_MAX]; /* exponent */ +}; + +struct tps25990_data { + struct pmbus_driver_info *info; + struct local_direct_value *info_local; +}; + +static int tps25990_raw_to_value(struct i2c_client *client, int param, int= raw) +{ + struct tps25990_data *data =3D (struct tps25990_data *)of_device_get_matc= h_data(&client->dev); + struct local_direct_value *info_local =3D data->info_local; + + /* Formula : X =3D (Y / 10^R - b) / m */ + if (info_local->R[param] >=3D 0) + raw /=3D int_pow(10, info_local->R[param]); + else + raw *=3D int_pow(10, -info_local->R[param]); + + return DIV_ROUND_CLOSEST(raw - info_local->b[param], info_local->m[param]= ); +} + +static unsigned int tps25990_value_to_raw(struct i2c_client *client, int p= aram, int val) +{ + struct tps25990_data *data =3D (struct tps25990_data *)of_device_get_matc= h_data(&client->dev); + struct local_direct_value *info_local =3D data->info_local; + + /* Formula : Y =3D ( m * X + b) * 10^R */ + val =3D (long)val * info_local->m[param] + info_local->b[param]; + + if (info_local->R[param] >=3D 0) + val *=3D int_pow(10, info_local->R[param]); + else + val =3D DIV_ROUND_CLOSEST(val, int_pow(10, -info_local->R[param])); + + return val; +} + /* * Arbitrary default Rimon value: 1kOhm * This correspond to an overcurrent limit of 55A, close to the specified = limit @@ -184,9 +225,7 @@ static int tps25990_read_word_data(struct i2c_client *c= lient, ret =3D pmbus_read_word_data(client, page, phase, reg); if (ret < 0) break; - ret =3D DIV_ROUND_CLOSEST(ret * TPS25990_VIN_OVF_NUM, - TPS25990_VIN_OVF_DIV); - ret +=3D TPS25990_VIN_OVF_OFF; + ret =3D tps25990_raw_to_value(client, TPS25990_VIN_OVF, ret); break; =20 case PMBUS_IIN_OC_FAULT_LIMIT: @@ -198,9 +237,7 @@ static int tps25990_read_word_data(struct i2c_client *c= lient, ret =3D pmbus_read_byte_data(client, page, TPS25990_VIREF); if (ret < 0) break; - ret =3D DIV_ROUND_CLOSEST(ret * TPS25990_IIN_OCF_NUM, - TPS25990_IIN_OCF_DIV); - ret +=3D TPS25990_IIN_OCF_OFF; + ret =3D tps25990_raw_to_value(client, TPS25990_IIN_OCF, ret); break; =20 case PMBUS_VIRT_SAMPLES: @@ -246,17 +283,13 @@ static int tps25990_write_word_data(struct i2c_client= *client, break; =20 case PMBUS_VIN_OV_FAULT_LIMIT: - value -=3D TPS25990_VIN_OVF_OFF; - value =3D DIV_ROUND_CLOSEST(((unsigned int)value) * TPS25990_VIN_OVF_DIV, - TPS25990_VIN_OVF_NUM); + value =3D tps25990_value_to_raw(client, TPS25990_VIN_OVF, value); value =3D clamp_val(value, 0, 0xf); ret =3D pmbus_write_word_data(client, page, reg, value); break; =20 case PMBUS_IIN_OC_FAULT_LIMIT: - value -=3D TPS25990_IIN_OCF_OFF; - value =3D DIV_ROUND_CLOSEST(((unsigned int)value) * TPS25990_IIN_OCF_DIV, - TPS25990_IIN_OCF_NUM); + value =3D tps25990_value_to_raw(client, TPS25990_IIN_OCF, value); value =3D clamp_val(value, 0, 0x3f); ret =3D pmbus_write_byte_data(client, page, TPS25990_VIREF, value); break; @@ -337,7 +370,16 @@ static const struct regulator_desc tps25990_reg_desc[]= =3D { }; #endif =20 -static const struct pmbus_driver_info tps25990_base_info =3D { +struct local_direct_value tps25590_local_info =3D { + .m[TPS25990_VIN_OVF] =3D 10163, + .b[TPS25990_VIN_OVF] =3D -30081, + .R[TPS25990_VIN_OVF] =3D -4, + .m[TPS25990_IIN_OCF] =3D 9538, + .b[TPS25990_IIN_OCF] =3D 0, + .R[TPS25990_IIN_OCF] =3D -6, +}; + +static struct pmbus_driver_info tps25990_base_info =3D { .pages =3D 1, .format[PSC_VOLTAGE_IN] =3D direct, .m[PSC_VOLTAGE_IN] =3D 5251, @@ -386,14 +428,19 @@ static const struct pmbus_driver_info tps25990_base_i= nfo =3D { #endif }; =20 +struct tps25990_data data_tps25990 =3D { + .info =3D &tps25990_base_info, + .info_local =3D &tps25590_local_info, +}; + static const struct i2c_device_id tps25990_i2c_id[] =3D { - { "tps25990" }, + { .name =3D "tps25990", .driver_data =3D (kernel_ulong_t)&data_tps25990 }, {} }; MODULE_DEVICE_TABLE(i2c, tps25990_i2c_id); =20 static const struct of_device_id tps25990_of_match[] =3D { - { .compatible =3D "ti,tps25990" }, + { .compatible =3D "ti,tps25990", .data =3D &data_tps25990 }, {} }; MODULE_DEVICE_TABLE(of, tps25990_of_match); @@ -401,23 +448,37 @@ MODULE_DEVICE_TABLE(of, tps25990_of_match); static int tps25990_probe(struct i2c_client *client) { struct device *dev =3D &client->dev; - struct pmbus_driver_info *info; + struct tps25990_data *data; u32 rimon =3D TPS25990_DEFAULT_RIMON; + struct pmbus_driver_info *info_get; + struct local_direct_value *info_local_get; int ret; =20 ret =3D device_property_read_u32(dev, "ti,rimon-micro-ohms", &rimon); if (ret < 0 && ret !=3D -EINVAL) return dev_err_probe(dev, ret, "failed to get rimon\n"); =20 - info =3D devm_kmemdup(dev, &tps25990_base_info, sizeof(*info), GFP_KERNEL= ); - if (!info) + data =3D (struct tps25990_data *)of_device_get_match_data(dev); + if (!data) + return -EOPNOTSUPP; + + info_get =3D data->info; + /* Make copy of pmbus_info and replace it to preserve original values */ + data->info =3D devm_kmemdup(dev, info_get, sizeof(*info_get), GFP_KERNEL); + if (!data->info) + return -ENOMEM; + + info_local_get =3D data->info_local; 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([46.10.240.40]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-43796a5d156sm35757690f8f.5.2026.02.17.00.12.10 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 17 Feb 2026 00:12:11 -0800 (PST) From: Stoyan Bogdanov To: jbrunet@baylibre.com, linux@roeck-us.net, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, corbet@lwn.net, skhan@linuxfoundation.org Cc: linux-hwmon@vger.kernel.org, devicetree@vger.kernel.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, Stoyan Bogdanov , Krzysztof Kozlowski Subject: [PATCH v3 2/3] dt-bindings: hwmon: pmbus/tps1689: Add TPS1689 Date: Tue, 17 Feb 2026 10:12:02 +0200 Message-Id: <20260217081203.1792025-3-sbogdanov@baylibre.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20260217081203.1792025-1-sbogdanov@baylibre.com> References: <20260217081203.1792025-1-sbogdanov@baylibre.com> 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" Add device compatible support for TPS1689 Signed-off-by: Stoyan Bogdanov Acked-by: Krzysztof Kozlowski --- .../devicetree/bindings/hwmon/pmbus/ti,tps25990.yaml | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/Documentation/devicetree/bindings/hwmon/pmbus/ti,tps25990.yaml= b/Documentation/devicetree/bindings/hwmon/pmbus/ti,tps25990.yaml index f4115870e450..973ee00c2c49 100644 --- a/Documentation/devicetree/bindings/hwmon/pmbus/ti,tps25990.yaml +++ b/Documentation/devicetree/bindings/hwmon/pmbus/ti,tps25990.yaml @@ -16,7 +16,9 @@ description: =20 properties: compatible: - const: ti,tps25990 + enum: + - ti,tps1689 + - ti,tps25990 =20 reg: maxItems: 1 --=20 2.34.1 From nobody Thu Apr 2 18:53:49 2026 Received: from mail-wr1-f43.google.com (mail-wr1-f43.google.com [209.85.221.43]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 7B72A2DF137 for ; Tue, 17 Feb 2026 08:12:14 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; 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([46.10.240.40]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-43796a5d156sm35757690f8f.5.2026.02.17.00.12.11 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 17 Feb 2026 00:12:12 -0800 (PST) From: Stoyan Bogdanov To: jbrunet@baylibre.com, linux@roeck-us.net, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, corbet@lwn.net, skhan@linuxfoundation.org Cc: linux-hwmon@vger.kernel.org, devicetree@vger.kernel.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, Stoyan Bogdanov Subject: [PATCH v3 3/3] hwmon: (pmbus/tps1689): Add TPS1689 support Date: Tue, 17 Feb 2026 10:12:03 +0200 Message-Id: <20260217081203.1792025-4-sbogdanov@baylibre.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20260217081203.1792025-1-sbogdanov@baylibre.com> References: <20260217081203.1792025-1-sbogdanov@baylibre.com> 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" Extend tps25990 existing driver to support tps1689 eFuse, since they are sharing command interface and functionality Update documentation for tps1689 Signed-off-by: Stoyan Bogdanov --- Documentation/hwmon/tps25990.rst | 15 ++++-- drivers/hwmon/pmbus/tps25990.c | 91 ++++++++++++++++++++++++++++---- 2 files changed, 92 insertions(+), 14 deletions(-) diff --git a/Documentation/hwmon/tps25990.rst b/Documentation/hwmon/tps2599= 0.rst index 04faec780d26..e8bc9a550bda 100644 --- a/Documentation/hwmon/tps25990.rst +++ b/Documentation/hwmon/tps25990.rst @@ -9,26 +9,31 @@ Supported chips: =20 Prefix: 'tps25990' =20 - * Datasheet + Datasheet: Publicly available at Texas Instruments website: https://ww= w.ti.com/lit/gpn/tps25990 =20 - Publicly available at Texas Instruments website: https://www.ti.com/li= t/gpn/tps25990 + * TI TPS1689 + + Prefix: 'tps1689' + + Datasheet: Publicly available at Texas Instruments website: https://ww= w.ti.com/lit/gpn/tps1689 =20 Author: =20 Jerome Brunet + Stoyan Bogdanov =20 Description ----------- =20 -This driver implements support for TI TPS25990 eFuse. +This driver implements support for TI TPS25990 and TI TPS1689 eFuse chips. This is an integrated, high-current circuit protection and power management device with PMBUS interface =20 -Device compliant with: +Devices are compliant with: =20 - PMBus rev 1.3 interface. =20 -Device supports direct format for reading input voltages, +Devices supports direct format for reading input voltages, output voltage, input current, input power and temperature. =20 Due to the specificities of the chip, all history reset attributes diff --git a/drivers/hwmon/pmbus/tps25990.c b/drivers/hwmon/pmbus/tps25990.c index 33f6367f797c..f9ff4edadf53 100644 --- a/drivers/hwmon/pmbus/tps25990.c +++ b/drivers/hwmon/pmbus/tps25990.c @@ -58,34 +58,38 @@ struct tps25990_data { struct local_direct_value *info_local; }; =20 -static int tps25990_raw_to_value(struct i2c_client *client, int param, int= raw) +static int tps25990_raw_to_value(struct i2c_client *client, int param, u32= raw) { struct tps25990_data *data =3D (struct tps25990_data *)of_device_get_matc= h_data(&client->dev); struct local_direct_value *info_local =3D data->info_local; + int val; =20 /* Formula : X =3D (Y / 10^R - b) / m */ if (info_local->R[param] >=3D 0) - raw /=3D int_pow(10, info_local->R[param]); + val =3D DIV_ROUND_CLOSEST_ULL(raw, int_pow(10, info_local->R[param])); else - raw *=3D int_pow(10, -info_local->R[param]); + val =3D raw * int_pow(10, -info_local->R[param]); =20 - return DIV_ROUND_CLOSEST(raw - info_local->b[param], info_local->m[param]= ); + val =3D DIV_ROUND_CLOSEST(val - info_local->b[param], info_local->m[param= ]); + + return val; } =20 static unsigned int tps25990_value_to_raw(struct i2c_client *client, int p= aram, int val) { struct tps25990_data *data =3D (struct tps25990_data *)of_device_get_matc= h_data(&client->dev); struct local_direct_value *info_local =3D data->info_local; + u32 raw; // return raw up to u16 -> u32 =20 /* Formula : Y =3D ( m * X + b) * 10^R */ - val =3D (long)val * info_local->m[param] + info_local->b[param]; + raw =3D ((long)val * info_local->m[param]) + info_local->b[param]; =20 if (info_local->R[param] >=3D 0) - val *=3D int_pow(10, info_local->R[param]); + raw *=3D int_pow(10, info_local->R[param]); else - val =3D DIV_ROUND_CLOSEST(val, int_pow(10, -info_local->R[param])); + raw =3D DIV_ROUND_CLOSEST_ULL(raw, int_pow(10, -info_local->R[param])); =20 - return val; + return raw; } =20 /* @@ -281,7 +285,6 @@ static int tps25990_write_word_data(struct i2c_client *= client, value =3D clamp_val(value, 0, 0xff); ret =3D pmbus_write_word_data(client, page, reg, value); break; - case PMBUS_VIN_OV_FAULT_LIMIT: value =3D tps25990_value_to_raw(client, TPS25990_VIN_OVF, value); value =3D clamp_val(value, 0, 0xf); @@ -370,6 +373,15 @@ static const struct regulator_desc tps25990_reg_desc[]= =3D { }; #endif =20 +struct local_direct_value tps1689_local_info =3D { + .m[TPS25990_VIN_OVF] =3D 3984, + .b[TPS25990_VIN_OVF] =3D -63750, + .R[TPS25990_VIN_OVF] =3D -3, + .m[TPS25990_IIN_OCF] =3D 7111, + .b[TPS25990_IIN_OCF] =3D -2133, + .R[TPS25990_IIN_OCF] =3D -2, +}; + struct local_direct_value tps25590_local_info =3D { .m[TPS25990_VIN_OVF] =3D 10163, .b[TPS25990_VIN_OVF] =3D -30081, @@ -379,6 +391,60 @@ struct local_direct_value tps25590_local_info =3D { .R[TPS25990_IIN_OCF] =3D -6, }; =20 +static struct pmbus_driver_info tps1689_base_info =3D { + .pages =3D 1, + .format[PSC_VOLTAGE_IN] =3D direct, + .m[PSC_VOLTAGE_IN] =3D 1166, + .b[PSC_VOLTAGE_IN] =3D 0, + .R[PSC_VOLTAGE_IN] =3D -2, + .format[PSC_VOLTAGE_OUT] =3D direct, + .m[PSC_VOLTAGE_OUT] =3D 1166, + .b[PSC_VOLTAGE_OUT] =3D 0, + .R[PSC_VOLTAGE_OUT] =3D -2, + .format[PSC_TEMPERATURE] =3D direct, + .m[PSC_TEMPERATURE] =3D 140, + .b[PSC_TEMPERATURE] =3D 32103, + .R[PSC_TEMPERATURE] =3D -2, + /* + * Current and Power measurement depends on the ohm value + * of Rimon. m is multiplied by 1000 below to have an integer + * and -3 is added to R to compensate. + */ + .format[PSC_CURRENT_IN] =3D direct, + .m[PSC_CURRENT_IN] =3D 9548, + .b[PSC_CURRENT_IN] =3D 0, + .R[PSC_CURRENT_IN] =3D -6, + .format[PSC_CURRENT_OUT] =3D direct, + .m[PSC_CURRENT_OUT] =3D 24347, + .b[PSC_CURRENT_OUT] =3D 0, + .R[PSC_CURRENT_OUT] =3D -3, + .format[PSC_POWER] =3D direct, + .m[PSC_POWER] =3D 2775, + .b[PSC_POWER] =3D 0, + .R[PSC_POWER] =3D -4, + .func[0] =3D (PMBUS_HAVE_VIN | + PMBUS_HAVE_VOUT | + PMBUS_HAVE_VMON | + PMBUS_HAVE_IIN | + PMBUS_HAVE_PIN | + PMBUS_HAVE_TEMP | + PMBUS_HAVE_STATUS_VOUT | + PMBUS_HAVE_STATUS_IOUT | + PMBUS_HAVE_STATUS_INPUT | + PMBUS_HAVE_STATUS_TEMP | + PMBUS_HAVE_SAMPLES), + + .read_word_data =3D tps25990_read_word_data, + .write_word_data =3D tps25990_write_word_data, + .read_byte_data =3D tps25990_read_byte_data, + .write_byte_data =3D tps25990_write_byte_data, + +#if IS_ENABLED(CONFIG_SENSORS_TPS25990_REGULATOR) + .reg_desc =3D tps25990_reg_desc, + .num_regulators =3D ARRAY_SIZE(tps25990_reg_desc), +#endif +}; + static struct pmbus_driver_info tps25990_base_info =3D { .pages =3D 1, .format[PSC_VOLTAGE_IN] =3D direct, @@ -428,18 +494,25 @@ static struct pmbus_driver_info tps25990_base_info = =3D { #endif }; =20 +struct tps25990_data data_tps1689 =3D { + .info =3D &tps1689_base_info, + .info_local =3D &tps1689_local_info, +}; + struct tps25990_data data_tps25990 =3D { .info =3D &tps25990_base_info, .info_local =3D &tps25590_local_info, }; =20 static const struct i2c_device_id tps25990_i2c_id[] =3D { + { .name =3D "tps1689", .driver_data =3D (kernel_ulong_t)&data_tps1689 }, { .name =3D "tps25990", .driver_data =3D (kernel_ulong_t)&data_tps25990 }, {} }; MODULE_DEVICE_TABLE(i2c, tps25990_i2c_id); =20 static const struct of_device_id tps25990_of_match[] =3D { + { .compatible =3D "ti,tps1689", .data =3D &data_tps1689 }, { .compatible =3D "ti,tps25990", .data =3D &data_tps25990 }, {} }; --=20 2.34.1