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[60.250.192.107]) by smtp.gmail.com with ESMTPSA id t12-20020a170902e84c00b001db3361bc1dsm289253plg.102.2024.02.26.16.56.59 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 26 Feb 2024 16:57:02 -0800 (PST) From: baneric926@gmail.com X-Google-Original-From: kcfeng0@nuvoton.com To: jdelvare@suse.com, linux@roeck-us.net, robh+dt@kernel.org, krzysztof.kozlowski+dt@linaro.org, conor+dt@kernel.org, corbet@lwn.net Cc: linux-hwmon@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, openbmc@lists.ozlabs.org, kwliu@nuvoton.com, kcfeng0@nuvoton.com, DELPHINE_CHIU@wiwynn.com, Bonnie_Lo@wiwynn.com, naresh.solanki@9elements.com, billy_tsai@aspeedtech.com, Rob Herring Subject: [PATCH v4 1/3] dt-bindings: hwmon: fan: Add fan binding to schema Date: Tue, 27 Feb 2024 08:56:04 +0800 Message-Id: <20240227005606.1107203-2-kcfeng0@nuvoton.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240227005606.1107203-1-kcfeng0@nuvoton.com> References: <20240227005606.1107203-1-kcfeng0@nuvoton.com> Precedence: bulk X-Mailing-List: linux-hwmon@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 From: Naresh Solanki Add common fan properties bindings to a schema. Bindings for fan controllers can reference the common schema for the fan child nodes: patternProperties: "^fan@[0-2]": type: object $ref: fan-common.yaml# unevaluatedProperties: false Reviewed-by: Rob Herring Signed-off-by: Naresh Solanki Signed-off-by: Billy Tsai Signed-off-by: Ban Feng --- .../devicetree/bindings/hwmon/fan-common.yaml | 78 +++++++++++++++++++ 1 file changed, 78 insertions(+) create mode 100644 Documentation/devicetree/bindings/hwmon/fan-common.yaml diff --git a/Documentation/devicetree/bindings/hwmon/fan-common.yaml b/Documentation/devicetree/bindings/hwmon/fan-common.yaml new file mode 100644 index 000000000000..15c591c74545 --- /dev/null +++ b/Documentation/devicetree/bindings/hwmon/fan-common.yaml @@ -0,0 +1,78 @@ +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/hwmon/fan-common.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Common Fan Properties + +maintainers: + - Naresh Solanki + - Billy Tsai + +properties: + max-rpm: + description: + Max RPM supported by fan. + $ref: /schemas/types.yaml#/definitions/uint32 + maximum: 100000 + + min-rpm: + description: + Min RPM supported by fan. + $ref: /schemas/types.yaml#/definitions/uint32 + maximum: 1000 + + pulses-per-revolution: + description: + The number of pulse from fan sensor per revolution. + $ref: /schemas/types.yaml#/definitions/uint32 + maximum: 4 + + tach-div: + description: + Divisor for the tach sampling clock, which determines the sensitivity of the tach pin. + $ref: /schemas/types.yaml#/definitions/uint32 + + target-rpm: + description: + The default desired fan speed in RPM. + $ref: /schemas/types.yaml#/definitions/uint32 + + fan-driving-mode: + description: + Select the driving mode of the fan.(DC, PWM and so on) + $ref: /schemas/types.yaml#/definitions/string + enum: [ dc, pwm ] + + pwms: + description: + PWM provider. + maxItems: 1 + + "#cooling-cells": + const: 2 + + cooling-levels: + description: + The control value which correspond to thermal cooling states. + $ref: /schemas/types.yaml#/definitions/uint32-array + + tach-ch: + description: + The tach channel used for the fan. + $ref: /schemas/types.yaml#/definitions/uint8-array + + label: + description: + Optional fan label + + fan-supply: + description: + Power supply for fan. + + reg: + maxItems: 1 + +additionalProperties: true + From patchwork Tue Feb 27 00:56:05 2024 Content-Type: text/plain; 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[60.250.192.107]) by smtp.gmail.com with ESMTPSA id t12-20020a170902e84c00b001db3361bc1dsm289253plg.102.2024.02.26.16.57.02 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 26 Feb 2024 16:57:05 -0800 (PST) From: baneric926@gmail.com X-Google-Original-From: kcfeng0@nuvoton.com To: jdelvare@suse.com, linux@roeck-us.net, robh+dt@kernel.org, krzysztof.kozlowski+dt@linaro.org, conor+dt@kernel.org, corbet@lwn.net Cc: linux-hwmon@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, openbmc@lists.ozlabs.org, kwliu@nuvoton.com, kcfeng0@nuvoton.com, DELPHINE_CHIU@wiwynn.com, Bonnie_Lo@wiwynn.com, naresh.solanki@9elements.com, billy_tsai@aspeedtech.com, Rob Herring Subject: [PATCH v4 2/3] dt-bindings: hwmon: Add NCT7363Y documentation Date: Tue, 27 Feb 2024 08:56:05 +0800 Message-Id: <20240227005606.1107203-3-kcfeng0@nuvoton.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240227005606.1107203-1-kcfeng0@nuvoton.com> References: <20240227005606.1107203-1-kcfeng0@nuvoton.com> Precedence: bulk X-Mailing-List: linux-hwmon@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 From: Ban Feng Adding bindings for the Nuvoton NCT7363Y Fan Controller Reviewed-by: Rob Herring Signed-off-by: Ban Feng Reviewed-by: Paul Menzel --- .../bindings/hwmon/nuvoton,nct7363.yaml | 63 +++++++++++++++++++ MAINTAINERS | 6 ++ 2 files changed, 69 insertions(+) create mode 100644 Documentation/devicetree/bindings/hwmon/nuvoton,nct7363.yaml diff --git a/Documentation/devicetree/bindings/hwmon/nuvoton,nct7363.yaml b/Documentation/devicetree/bindings/hwmon/nuvoton,nct7363.yaml new file mode 100644 index 000000000000..1a9d9a5d614e --- /dev/null +++ b/Documentation/devicetree/bindings/hwmon/nuvoton,nct7363.yaml @@ -0,0 +1,63 @@ +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) +%YAML 1.2 +--- + +$id: http://devicetree.org/schemas/hwmon/nuvoton,nct7363.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Nuvoton NCT7363Y Hardware Monitoring IC + +maintainers: + - Ban Feng + +description: | + The NCT7363Y is a Fan controller which provides up to 16 independent + FAN input monitors, and up to 16 independent PWM output with SMBus interface. + +properties: + compatible: + enum: + - nuvoton,nct7363 + + reg: + maxItems: 1 + + "#pwm-cells": + const: 2 + +patternProperties: + "^fan-[0-9]+$": + $ref: fan-common.yaml# + unevaluatedProperties: false + required: + - pwms + - tach-ch + +required: + - compatible + - reg + - "#pwm-cells" + +additionalProperties: false + +examples: + - | + i2c { + #address-cells = <1>; + #size-cells = <0>; + + hwmon: hwmon@22 { + compatible = "nuvoton,nct7363"; + reg = <0x22>; + #pwm-cells = <2>; + + fan-0 { + pwms = <&hwmon 0 50000>; + tach-ch = /bits/ 8 <0x00>; + }; + fan-1 { + pwms = <&hwmon 1 50000>; + tach-ch = /bits/ 8 <0x01>; + }; + }; + }; diff --git a/MAINTAINERS b/MAINTAINERS index 2ecaaec6a6bf..7b1efefed7c4 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -15084,6 +15084,12 @@ S: Maintained F: Documentation/devicetree/bindings/hwmon/nuvoton,nct6775.yaml F: drivers/hwmon/nct6775-i2c.c +NCT7363 HARDWARE MONITOR DRIVER +M: Ban Feng +L: linux-hwmon@vger.kernel.org +S: Maintained +F: Documentation/devicetree/bindings/hwmon/nuvoton,nct7363.yaml + NETDEVSIM M: Jakub Kicinski S: Maintained From patchwork Tue Feb 27 00:56:06 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ban Feng X-Patchwork-Id: 13573029 Received: from mail-pl1-f169.google.com (mail-pl1-f169.google.com [209.85.214.169]) (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 76D1FE56E; 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[60.250.192.107]) by smtp.gmail.com with ESMTPSA id t12-20020a170902e84c00b001db3361bc1dsm289253plg.102.2024.02.26.16.57.05 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 26 Feb 2024 16:57:08 -0800 (PST) From: baneric926@gmail.com X-Google-Original-From: kcfeng0@nuvoton.com To: jdelvare@suse.com, linux@roeck-us.net, robh+dt@kernel.org, krzysztof.kozlowski+dt@linaro.org, conor+dt@kernel.org, corbet@lwn.net Cc: linux-hwmon@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, openbmc@lists.ozlabs.org, kwliu@nuvoton.com, kcfeng0@nuvoton.com, DELPHINE_CHIU@wiwynn.com, Bonnie_Lo@wiwynn.com, naresh.solanki@9elements.com, billy_tsai@aspeedtech.com Subject: [PATCH v4 3/3] hwmon: Driver for Nuvoton NCT7363Y Date: Tue, 27 Feb 2024 08:56:06 +0800 Message-Id: <20240227005606.1107203-4-kcfeng0@nuvoton.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240227005606.1107203-1-kcfeng0@nuvoton.com> References: <20240227005606.1107203-1-kcfeng0@nuvoton.com> Precedence: bulk X-Mailing-List: linux-hwmon@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 From: Ban Feng NCT7363Y is an I2C based hardware monitoring chip from Nuvoton. Signed-off-by: Ban Feng --- Documentation/hwmon/index.rst | 1 + Documentation/hwmon/nct7363.rst | 33 +++ MAINTAINERS | 2 + drivers/hwmon/Kconfig | 11 + drivers/hwmon/Makefile | 1 + drivers/hwmon/nct7363.c | 412 ++++++++++++++++++++++++++++++++ 6 files changed, 460 insertions(+) create mode 100644 Documentation/hwmon/nct7363.rst create mode 100644 drivers/hwmon/nct7363.c diff --git a/Documentation/hwmon/index.rst b/Documentation/hwmon/index.rst index c7ed1f73ac06..302f954b45be 100644 --- a/Documentation/hwmon/index.rst +++ b/Documentation/hwmon/index.rst @@ -165,6 +165,7 @@ Hardware Monitoring Kernel Drivers mp5990 nct6683 nct6775 + nct7363 nct7802 nct7904 npcm750-pwm-fan diff --git a/Documentation/hwmon/nct7363.rst b/Documentation/hwmon/nct7363.rst new file mode 100644 index 000000000000..89699c95aa4b --- /dev/null +++ b/Documentation/hwmon/nct7363.rst @@ -0,0 +1,33 @@ +.. SPDX-License-Identifier: GPL-2.0 + +Kernel driver nct7363 +===================== + +Supported chip: + + * Nuvoton NCT7363Y + + Prefix: nct7363 + + Addresses: I2C 0x20, 0x21, 0x22, 0x23 + +Author: Ban Feng + + +Description +----------- + +The NCT7363Y is a Fan controller which provides up to 16 independent +FAN input monitors, and up to 16 independent PWM output with SMBus interface. + + +Sysfs entries +------------- + +Currently, the driver supports the following features: + +======================= ======================================================= +fanX_input provide current fan rotation value in RPM + +pwmX get or set PWM fan control value. +======================= ======================================================= diff --git a/MAINTAINERS b/MAINTAINERS index 7b1efefed7c4..7ca66b713e30 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -15089,6 +15089,8 @@ M: Ban Feng L: linux-hwmon@vger.kernel.org S: Maintained F: Documentation/devicetree/bindings/hwmon/nuvoton,nct7363.yaml +F: Documentation/hwmon/nct7363.rst +F: drivers/hwmon/nct7363.c NETDEVSIM M: Jakub Kicinski diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig index a608264da87d..a297b5409b04 100644 --- a/drivers/hwmon/Kconfig +++ b/drivers/hwmon/Kconfig @@ -1616,6 +1616,17 @@ config SENSORS_NCT6775_I2C This driver can also be built as a module. If so, the module will be called nct6775-i2c. +config SENSORS_NCT7363 + tristate "Nuvoton NCT7363Y" + depends on I2C + select REGMAP_I2C + help + If you say yes here you get support for the Nuvoton NCT7363Y, + hardware monitoring chip. + + This driver can also be built as a module. If so, the module + will be called nct7363. + config SENSORS_NCT7802 tristate "Nuvoton NCT7802Y" depends on I2C diff --git a/drivers/hwmon/Makefile b/drivers/hwmon/Makefile index 47be39af5c03..d5e7531204df 100644 --- a/drivers/hwmon/Makefile +++ b/drivers/hwmon/Makefile @@ -167,6 +167,7 @@ obj-$(CONFIG_SENSORS_NCT6775_CORE) += nct6775-core.o nct6775-objs := nct6775-platform.o obj-$(CONFIG_SENSORS_NCT6775) += nct6775.o obj-$(CONFIG_SENSORS_NCT6775_I2C) += nct6775-i2c.o +obj-$(CONFIG_SENSORS_NCT7363) += nct7363.o obj-$(CONFIG_SENSORS_NCT7802) += nct7802.o obj-$(CONFIG_SENSORS_NCT7904) += nct7904.o obj-$(CONFIG_SENSORS_NPCM7XX) += npcm750-pwm-fan.o diff --git a/drivers/hwmon/nct7363.c b/drivers/hwmon/nct7363.c new file mode 100644 index 000000000000..c79d3ca4f111 --- /dev/null +++ b/drivers/hwmon/nct7363.c @@ -0,0 +1,412 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Copyright (c) 2023 Nuvoton Technology corporation. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define NCT7363_REG_GPIO_0_3 0x20 +#define NCT7363_REG_GPIO_4_7 0x21 +#define NCT7363_REG_GPIO_10_13 0x22 +#define NCT7363_REG_GPIO_14_17 0x23 +#define NCT7363_REG_PWMEN_0_7 0x38 +#define NCT7363_REG_PWMEN_8_15 0x39 +#define NCT7363_REG_FANINEN_0_7 0x41 +#define NCT7363_REG_FANINEN_8_15 0x42 +#define NCT7363_REG_FANINX_HVAL(x) (0x48 + ((x) * 2)) +#define NCT7363_REG_FANINX_LVAL(x) (0x49 + ((x) * 2)) +#define NCT7363_REG_FSCPXDUTY(x) (0x90 + ((x) * 2)) + +#define PWM_SEL(x) (BIT(0) << (((x) % 4) * 2)) +#define FANIN_SEL(x) (BIT(1) << (((x) % 4) * 2)) + +#define NCT7363_FANINX_LVAL_MASK GENMASK(4, 0) +#define NCT7363_FANIN_MASK GENMASK(12, 0) + +#define NCT7363_PWM_COUNT 16 + +static inline unsigned long FAN_FROM_REG(u16 val) +{ + /* In case fan is stopped or divide by 0 */ + if (val == NCT7363_FANIN_MASK || val == 0) + return 0; + + return (1350000UL / val); +} + +static const struct of_device_id nct7363_of_match[] = { + { .compatible = "nuvoton,nct7363" }, + { }, +}; +MODULE_DEVICE_TABLE(of, nct7363_of_match); + +struct nct7363_data { + struct regmap *regmap; + struct mutex lock; /* protect register access */ + + u16 fanin_mask; + u16 pwm_mask; +}; + +static int nct7363_read_fan(struct device *dev, u32 attr, int channel, + long *val) +{ + struct nct7363_data *data = dev_get_drvdata(dev); + unsigned int hi, lo; + u16 cnt, rpm; + int ret = 0; + + switch (attr) { + case hwmon_fan_input: + /* + * High-byte register should be read first to latch + * synchronous low-byte value + */ + ret = regmap_read(data->regmap, + NCT7363_REG_FANINX_HVAL(channel), &hi); + if (ret) + return ret; + + ret = regmap_read(data->regmap, + NCT7363_REG_FANINX_LVAL(channel), &lo); + if (ret) + return ret; + + cnt = (hi << 5) | (lo & NCT7363_FANINX_LVAL_MASK); + rpm = FAN_FROM_REG(cnt); + *val = (long)rpm; + return 0; + default: + return -EOPNOTSUPP; + } +} + +static umode_t nct7363_fan_is_visible(const void *_data, u32 attr, int channel) +{ + const struct nct7363_data *data = _data; + + switch (attr) { + case hwmon_fan_input: + if (data->fanin_mask & BIT(channel)) + return 0444; + break; + default: + break; + } + + return 0; +} + +static int nct7363_read_pwm(struct device *dev, u32 attr, int channel, + long *val) +{ + struct nct7363_data *data = dev_get_drvdata(dev); + unsigned int regval; + u16 ret; + + switch (attr) { + case hwmon_pwm_input: + ret = regmap_read(data->regmap, + NCT7363_REG_FSCPXDUTY(channel), ®val); + if (ret) + return ret; + + *val = (long)regval; + return 0; + default: + return -EOPNOTSUPP; + } +} + +static int nct7363_write_pwm(struct device *dev, u32 attr, int channel, + long val) +{ + struct nct7363_data *data = dev_get_drvdata(dev); + int ret; + + switch (attr) { + case hwmon_pwm_input: + if (val < 0 || val > 255) + return -EINVAL; + + mutex_lock(&data->lock); + ret = regmap_write(data->regmap, + NCT7363_REG_FSCPXDUTY(channel), val); + mutex_unlock(&data->lock); + + return ret; + + default: + return -EOPNOTSUPP; + } +} + +static umode_t nct7363_pwm_is_visible(const void *_data, u32 attr, int channel) +{ + const struct nct7363_data *data = _data; + + switch (attr) { + case hwmon_pwm_input: + if (data->pwm_mask & BIT(channel)) + return 0644; + break; + default: + break; + } + + return 0; +} + +static int nct7363_read(struct device *dev, enum hwmon_sensor_types type, + u32 attr, int channel, long *val) +{ + switch (type) { + case hwmon_fan: + return nct7363_read_fan(dev, attr, channel, val); + case hwmon_pwm: + return nct7363_read_pwm(dev, attr, channel, val); + default: + return -EOPNOTSUPP; + } +} + +static int nct7363_write(struct device *dev, enum hwmon_sensor_types type, + u32 attr, int channel, long val) +{ + switch (type) { + case hwmon_pwm: + return nct7363_write_pwm(dev, attr, channel, val); + default: + return -EOPNOTSUPP; + } +} + +static umode_t nct7363_is_visible(const void *data, + enum hwmon_sensor_types type, + u32 attr, int channel) +{ + switch (type) { + case hwmon_fan: + return nct7363_fan_is_visible(data, attr, channel); + case hwmon_pwm: + return nct7363_pwm_is_visible(data, attr, channel); + default: + return 0; + } +} + +static const struct hwmon_channel_info *nct7363_info[] = { + HWMON_CHANNEL_INFO(fan, + HWMON_F_INPUT, + HWMON_F_INPUT, + HWMON_F_INPUT, + HWMON_F_INPUT, + HWMON_F_INPUT, + HWMON_F_INPUT, + HWMON_F_INPUT, + HWMON_F_INPUT, + HWMON_F_INPUT, + HWMON_F_INPUT, + HWMON_F_INPUT, + HWMON_F_INPUT, + HWMON_F_INPUT, + HWMON_F_INPUT, + HWMON_F_INPUT, + HWMON_F_INPUT), + HWMON_CHANNEL_INFO(pwm, + HWMON_PWM_INPUT, + HWMON_PWM_INPUT, + HWMON_PWM_INPUT, + HWMON_PWM_INPUT, + HWMON_PWM_INPUT, + HWMON_PWM_INPUT, + HWMON_PWM_INPUT, + HWMON_PWM_INPUT, + HWMON_PWM_INPUT, + HWMON_PWM_INPUT, + HWMON_PWM_INPUT, + HWMON_PWM_INPUT, + HWMON_PWM_INPUT, + HWMON_PWM_INPUT, + HWMON_PWM_INPUT, + HWMON_PWM_INPUT), + NULL +}; + +static const struct hwmon_ops nct7363_hwmon_ops = { + .is_visible = nct7363_is_visible, + .read = nct7363_read, + .write = nct7363_write, +}; + +static const struct hwmon_chip_info nct7363_chip_info = { + .ops = &nct7363_hwmon_ops, + .info = nct7363_info, +}; + +static int nct7363_init_chip(struct nct7363_data *data) +{ + u8 i, gpio0_3 = 0, gpio4_7 = 0, gpio10_13 = 0, gpio14_17 = 0; + int ret; + + for (i = 0; i < NCT7363_PWM_COUNT; i++) { + if (i < 4) { + if (data->pwm_mask & BIT(i)) + gpio0_3 |= PWM_SEL(i); + if (data->fanin_mask & BIT(i)) + gpio10_13 |= FANIN_SEL(i); + } else if (i < 8) { + if (data->pwm_mask & BIT(i)) + gpio4_7 |= PWM_SEL(i); + if (data->fanin_mask & BIT(i)) + gpio14_17 |= FANIN_SEL(i); + } else if (i < 12) { + if (data->pwm_mask & BIT(i)) + gpio10_13 |= PWM_SEL(i); + if (data->fanin_mask & BIT(i)) + gpio0_3 |= FANIN_SEL(i); + } else { + if (data->pwm_mask & BIT(i)) + gpio14_17 |= PWM_SEL(i); + if (data->fanin_mask & BIT(i)) + gpio4_7 |= FANIN_SEL(i); + } + } + + /* Pin Function Configuration */ + ret = regmap_write(data->regmap, NCT7363_REG_GPIO_0_3, gpio0_3); + if (ret < 0) + return ret; + ret = regmap_write(data->regmap, NCT7363_REG_GPIO_4_7, gpio4_7); + if (ret < 0) + return ret; + ret = regmap_write(data->regmap, NCT7363_REG_GPIO_10_13, gpio10_13); + if (ret < 0) + return ret; + ret = regmap_write(data->regmap, NCT7363_REG_GPIO_14_17, gpio14_17); + if (ret < 0) + return ret; + + /* PWM and FANIN Monitoring Enable */ + ret = regmap_write(data->regmap, NCT7363_REG_PWMEN_0_7, + data->pwm_mask & 0xff); + if (ret < 0) + return ret; + ret = regmap_write(data->regmap, NCT7363_REG_PWMEN_8_15, + (data->pwm_mask >> 8) & 0xff); + if (ret < 0) + return ret; + ret = regmap_write(data->regmap, NCT7363_REG_FANINEN_0_7, + data->fanin_mask & 0xff); + if (ret < 0) + return ret; + ret = regmap_write(data->regmap, NCT7363_REG_FANINEN_8_15, + (data->fanin_mask >> 8) & 0xff); + if (ret < 0) + return ret; + + return 0; +} + +static int nct7363_present_pwm_fanin(struct device *dev, + struct device_node *child, + struct nct7363_data *data) +{ + struct of_phandle_args args; + int ret, fanin_cnt; + u8 *fanin_ch; + u8 ch, index; + + ret = of_parse_phandle_with_args(child, "pwms", "#pwm-cells", + 0, &args); + if (ret) + return ret; + + data->pwm_mask |= BIT(args.args[0]); + + fanin_cnt = of_property_count_u8_elems(child, "tach-ch"); + if (fanin_cnt < 1) + return -EINVAL; + + fanin_ch = devm_kcalloc(dev, fanin_cnt, sizeof(*fanin_ch), GFP_KERNEL); + if (!fanin_ch) + return -ENOMEM; + + ret = of_property_read_u8_array(child, "tach-ch", fanin_ch, fanin_cnt); + if (ret) + return ret; + + for (ch = 0; ch < fanin_cnt; ch++) { + index = fanin_ch[ch]; + data->fanin_mask |= BIT(index); + } + + return 0; +} + +static const struct regmap_config nct7363_regmap_config = { + .reg_bits = 8, + .val_bits = 8, +}; + +static int nct7363_probe(struct i2c_client *client) +{ + struct device *dev = &client->dev; + struct device_node *child; + struct nct7363_data *data; + struct device *hwmon_dev; + int ret; + + data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL); + if (!data) + return -ENOMEM; + + data->regmap = devm_regmap_init_i2c(client, &nct7363_regmap_config); + if (IS_ERR(data->regmap)) + return PTR_ERR(data->regmap); + + mutex_init(&data->lock); + + for_each_child_of_node(dev->of_node, child) { + ret = nct7363_present_pwm_fanin(dev, child, data); + if (ret) { + of_node_put(child); + return ret; + } + } + + /* Initialize the chip */ + ret = nct7363_init_chip(data); + if (ret) + return ret; + + hwmon_dev = + devm_hwmon_device_register_with_info(dev, client->name, data, + &nct7363_chip_info, NULL); + return PTR_ERR_OR_ZERO(hwmon_dev); +} + +static struct i2c_driver nct7363_driver = { + .class = I2C_CLASS_HWMON, + .driver = { + .name = "nct7363", + .of_match_table = nct7363_of_match, + }, + .probe = nct7363_probe, +}; + +module_i2c_driver(nct7363_driver); + +MODULE_AUTHOR("CW Ho "); +MODULE_AUTHOR("Ban Feng "); +MODULE_DESCRIPTION("NCT7363 Hardware Monitoring Driver"); +MODULE_LICENSE("GPL");