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Add bindings for this monitor device. Signed-off-by: Inochi Amaoto Reviewed-by: Conor Dooley Tested-by: Chen Wang Reviewed-by: Chen Wang --- .../hwmon/sophgo,sg2042-hwmon-mcu.yaml | 43 +++++++++++++++++++ 1 file changed, 43 insertions(+) create mode 100644 Documentation/devicetree/bindings/hwmon/sophgo,sg2042-hwmon-mcu.yaml diff --git a/Documentation/devicetree/bindings/hwmon/sophgo,sg2042-hwmon-mcu.yaml b/Documentation/devicetree/bindings/hwmon/sophgo,sg2042-hwmon-mcu.yaml new file mode 100644 index 000000000000..f0667ac41d75 --- /dev/null +++ b/Documentation/devicetree/bindings/hwmon/sophgo,sg2042-hwmon-mcu.yaml @@ -0,0 +1,43 @@ +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/hwmon/sophgo,sg2042-hwmon-mcu.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Sophgo SG2042 onboard MCU support + +maintainers: + - Inochi Amaoto + +properties: + compatible: + const: sophgo,sg2042-hwmon-mcu + + reg: + maxItems: 1 + + "#thermal-sensor-cells": + const: 1 + +required: + - compatible + - reg + - "#thermal-sensor-cells" + +allOf: + - $ref: /schemas/thermal/thermal-sensor.yaml# + +unevaluatedProperties: false + +examples: + - | + i2c { + #address-cells = <1>; + #size-cells = <0>; + + hwmon@17 { + compatible = "sophgo,sg2042-hwmon-mcu"; + reg = <0x17>; + #thermal-sensor-cells = <1>; + }; + }; From patchwork Fri Aug 2 12:38:39 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Inochi Amaoto X-Patchwork-Id: 13751536 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 54EB8C3DA4A for ; Fri, 2 Aug 2024 12:39:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; 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Add driver support for the onboard MCU of SG2042. Signed-off-by: Inochi Amaoto Tested-by: Chen Wang Reviewed-by: Chen Wang --- Documentation/hwmon/index.rst | 1 + Documentation/hwmon/sg2042-mcu.rst | 39 +++ drivers/hwmon/Kconfig | 11 + drivers/hwmon/Makefile | 1 + drivers/hwmon/sg2042-mcu.c | 394 +++++++++++++++++++++++++++++ 5 files changed, 446 insertions(+) create mode 100644 Documentation/hwmon/sg2042-mcu.rst create mode 100644 drivers/hwmon/sg2042-mcu.c diff --git a/Documentation/hwmon/index.rst b/Documentation/hwmon/index.rst index 913c11390a45..ea3b5be8fe4f 100644 --- a/Documentation/hwmon/index.rst +++ b/Documentation/hwmon/index.rst @@ -206,6 +206,7 @@ Hardware Monitoring Kernel Drivers sch5636 scpi-hwmon sfctemp + sg2042-mcu sht15 sht21 sht3x diff --git a/Documentation/hwmon/sg2042-mcu.rst b/Documentation/hwmon/sg2042-mcu.rst new file mode 100644 index 000000000000..250016b47dd1 --- /dev/null +++ b/Documentation/hwmon/sg2042-mcu.rst @@ -0,0 +1,39 @@ +.. SPDX-License-Identifier: GPL-2.0 + +Kernel driver sg2042-mcu +===================== + +Supported chips: + + * Onboard MCU for sg2042 + + Addresses scanned: - + + Prefix: 'sg2042-mcu' + +Authors: + + - Inochi Amaoto + +Description +----------- + +This driver supprts hardware monitoring for onboard MCU with +i2c interface. + +Usage Notes +----------- + +This driver does not auto-detect devices. You will have to instantiate +the devices explicitly. +Please see Documentation/i2c/instantiating-devices.rst for details. + +Sysfs Attributes +---------------- + +================= ============================================= +temp1_input Measured temperature of SoC +temp1_crit Critical high temperature +temp1_crit_hyst hysteresis temperature restore from Critical +temp2_input Measured temperature of the base board +================= ============================================= diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig index b60fe2e58ad6..7aa6c3f322e5 100644 --- a/drivers/hwmon/Kconfig +++ b/drivers/hwmon/Kconfig @@ -2066,6 +2066,17 @@ config SENSORS_SFCTEMP This driver can also be built as a module. If so, the module will be called sfctemp. +config SENSORS_SG2042_MCU + tristate "Sophgo onboard MCU support" + depends on I2C + depends on ARCH_SOPHGO || COMPILE_TEST + help + Support for onboard MCU of Sophgo SG2042 SoCs. This mcu provides + power control and some basic information. + + This driver can be built as a module. If so, the module + will be called sg2042-mcu. + config SENSORS_SURFACE_FAN tristate "Surface Fan Driver" depends on SURFACE_AGGREGATOR diff --git a/drivers/hwmon/Makefile b/drivers/hwmon/Makefile index b1c7056c37db..0bbe812a67ae 100644 --- a/drivers/hwmon/Makefile +++ b/drivers/hwmon/Makefile @@ -194,6 +194,7 @@ obj-$(CONFIG_SENSORS_SCH56XX_COMMON)+= sch56xx-common.o obj-$(CONFIG_SENSORS_SCH5627) += sch5627.o obj-$(CONFIG_SENSORS_SCH5636) += sch5636.o obj-$(CONFIG_SENSORS_SFCTEMP) += sfctemp.o +obj-$(CONFIG_SENSORS_SG2042_MCU) += sg2042-mcu.o obj-$(CONFIG_SENSORS_SL28CPLD) += sl28cpld-hwmon.o obj-$(CONFIG_SENSORS_SHT15) += sht15.o obj-$(CONFIG_SENSORS_SHT21) += sht21.o diff --git a/drivers/hwmon/sg2042-mcu.c b/drivers/hwmon/sg2042-mcu.c new file mode 100644 index 000000000000..6d8d677f86f3 --- /dev/null +++ b/drivers/hwmon/sg2042-mcu.c @@ -0,0 +1,394 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (c) 2024 Inochi Amaoto + * + * Sophgo power control mcu for SG2042 + */ + +#include +#include +#include +#include +#include +#include +#include +#include + +/* fixed MCU registers */ +#define REG_BOARD_TYPE 0x00 +#define REG_MCU_FIRMWARE_VERSION 0x01 +#define REG_PCB_VERSION 0x02 +#define REG_PWR_CTRL 0x03 +#define REG_SOC_TEMP 0x04 +#define REG_BOARD_TEMP 0x05 +#define REG_RST_COUNT 0x0a +#define REG_UPTIME 0x0b +#define REG_RESET_REASON 0x0d +#define REG_MCU_TYPE 0x18 +#define REG_REPOWER_ACTION 0x65 +#define REG_CRITICAL_TEMP 0x66 +#define REG_REPOWER_TEMP 0x67 + +#define REPOWER_ACTION_REBOOT 1 +#define REPOWER_ACTION_POWEROFF 2 + +#define MCU_POWER_MAX 0xff + +#define DEFINE_MCU_DEBUG_ATTR(_name, _reg, _format) \ + static int _name##_show(struct seq_file *seqf, \ + void *unused) \ + { \ + struct sg2042_mcu_data *mcu = seqf->private; \ + int ret; \ + ret = i2c_smbus_read_byte_data(mcu->client, (_reg)); \ + if (ret < 0) \ + return ret; \ + seq_printf(seqf, _format "\n", ret); \ + return 0; \ + } \ + DEFINE_SHOW_ATTRIBUTE(_name) \ + +struct sg2042_mcu_data { + struct i2c_client *client; + struct dentry *debugfs; + struct mutex mutex; +}; + +static struct dentry *sgmcu_debugfs; + +static ssize_t reset_count_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct sg2042_mcu_data *mcu = dev_get_drvdata(dev); + int ret; + + ret = i2c_smbus_read_byte_data(mcu->client, REG_RST_COUNT); + if (ret < 0) + return ret; + + return sprintf(buf, "%d\n", ret); +} + +static ssize_t uptime_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct sg2042_mcu_data *mcu = dev_get_drvdata(dev); + u8 time_val[2]; + int ret; + + ret = i2c_smbus_read_i2c_block_data(mcu->client, REG_UPTIME, + sizeof(time_val), time_val); + if (ret < 0) + return ret; + + return sprintf(buf, "%d\n", + (int)(time_val[0]) + (int)(time_val[1] << 8)); +} + +static ssize_t reset_reason_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct sg2042_mcu_data *mcu = dev_get_drvdata(dev); + int ret; + + ret = i2c_smbus_read_byte_data(mcu->client, REG_RESET_REASON); + if (ret < 0) + return ret; + + return sprintf(buf, "0x%02x\n", ret); +} + +static ssize_t repower_action_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct sg2042_mcu_data *mcu = dev_get_drvdata(dev); + int ret; + const char *action; + + ret = i2c_smbus_read_byte_data(mcu->client, REG_REPOWER_ACTION); + if (ret < 0) + return ret; + + if (ret == REPOWER_ACTION_REBOOT) + action = "reboot"; + else if (ret == REPOWER_ACTION_POWEROFF) + action = "poweroff"; + else + action = "unknown"; + + return sprintf(buf, "%s\n", action); +} + +static ssize_t repower_action_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct sg2042_mcu_data *mcu = dev_get_drvdata(dev); + u8 value; + int ret; + + if (sysfs_streq("reboot", buf)) + value = REPOWER_ACTION_REBOOT; + else if (sysfs_streq("poweroff", buf)) + value = REPOWER_ACTION_POWEROFF; + else + return -EINVAL; + + guard(mutex)(&mcu->mutex); + + ret = i2c_smbus_write_byte_data(mcu->client, + REG_REPOWER_ACTION, value); + if (ret < 0) + return ret; + + return count; +} + +static DEVICE_ATTR_RO(reset_count); +static DEVICE_ATTR_RO(uptime); +static DEVICE_ATTR_RO(reset_reason); +static DEVICE_ATTR_RW(repower_action); + +DEFINE_MCU_DEBUG_ATTR(firmware_version, REG_MCU_FIRMWARE_VERSION, "0x%02x"); +DEFINE_MCU_DEBUG_ATTR(pcb_version, REG_PCB_VERSION, "0x%02x"); +DEFINE_MCU_DEBUG_ATTR(board_type, REG_BOARD_TYPE, "0x%02x"); +DEFINE_MCU_DEBUG_ATTR(mcu_type, REG_MCU_TYPE, "%d"); + +static struct attribute *sg2042_mcu_attrs[] = { + &dev_attr_reset_count.attr, + &dev_attr_uptime.attr, + &dev_attr_reset_reason.attr, + &dev_attr_repower_action.attr, + NULL +}; + +static const struct attribute_group sg2042_mcu_attr_group = { + .attrs = sg2042_mcu_attrs, +}; + +static const struct attribute_group *sg2042_mcu_groups[] = { + &sg2042_mcu_attr_group, + NULL +}; + +static const struct hwmon_channel_info * const sg2042_mcu_info[] = { + HWMON_CHANNEL_INFO(chip, HWMON_C_REGISTER_TZ), + HWMON_CHANNEL_INFO(temp, HWMON_T_INPUT | HWMON_T_CRIT | + HWMON_T_CRIT_HYST, + HWMON_T_INPUT), + NULL +}; + +static int sg2042_mcu_read(struct device *dev, + enum hwmon_sensor_types type, + u32 attr, int channel, long *val) +{ + struct sg2042_mcu_data *mcu = dev_get_drvdata(dev); + int tmp; + u8 reg; + + switch (attr) { + case hwmon_temp_input: + reg = channel ? REG_BOARD_TEMP : REG_SOC_TEMP; + break; + case hwmon_temp_crit: + reg = REG_CRITICAL_TEMP; + break; + case hwmon_temp_crit_hyst: + reg = REG_REPOWER_TEMP; + break; + default: + return -EOPNOTSUPP; + } + + tmp = i2c_smbus_read_byte_data(mcu->client, reg); + if (tmp < 0) + return tmp; + *val = tmp * 1000; + + return 0; +} + +static int sg2042_mcu_write(struct device *dev, + enum hwmon_sensor_types type, + u32 attr, int channel, long val) +{ + struct sg2042_mcu_data *mcu = dev_get_drvdata(dev); + int temp = val / 1000; + int hyst_temp, crit_temp; + u8 reg; + + if (temp > MCU_POWER_MAX) + temp = MCU_POWER_MAX; + else if (temp < 0) + temp = 0; + + guard(mutex)(&mcu->mutex); + + switch (attr) { + case hwmon_temp_crit: + hyst_temp = i2c_smbus_read_byte_data(mcu->client, + REG_REPOWER_TEMP); + if (hyst_temp < 0) + return hyst_temp; + + crit_temp = temp; + reg = REG_CRITICAL_TEMP; + break; + case hwmon_temp_crit_hyst: + crit_temp = i2c_smbus_read_byte_data(mcu->client, + REG_CRITICAL_TEMP); + if (crit_temp < 0) + return crit_temp; + + hyst_temp = temp; + reg = REG_REPOWER_TEMP; + break; + default: + return -EOPNOTSUPP; + } + + /* + * ensure hyst_temp is smaller to avoid MCU from + * keeping triggering repower event. + */ + if (crit_temp < hyst_temp) + return -EINVAL; + + return i2c_smbus_write_byte_data(mcu->client, reg, temp); +} + +static umode_t sg2042_mcu_is_visible(const void *_data, + enum hwmon_sensor_types type, + u32 attr, int channel) +{ + switch (type) { + case hwmon_temp: + switch (attr) { + case hwmon_temp_input: + return 0444; + case hwmon_temp_crit: + case hwmon_temp_crit_hyst: + if (channel == 0) + return 0664; + break; + default: + return 0; + } + break; + default: + return 0; + } + return 0; +} + +static const struct hwmon_ops sg2042_mcu_ops = { + .is_visible = sg2042_mcu_is_visible, + .read = sg2042_mcu_read, + .write = sg2042_mcu_write, +}; + +static const struct hwmon_chip_info sg2042_mcu_chip_info = { + .ops = &sg2042_mcu_ops, + .info = sg2042_mcu_info, +}; + +static void sg2042_mcu_debugfs_init(struct sg2042_mcu_data *mcu, + struct device *dev) +{ + mcu->debugfs = debugfs_create_dir(dev_name(dev), sgmcu_debugfs); + if (mcu->debugfs) { + debugfs_create_file("firmware_version", 0444, mcu->debugfs, + mcu, &firmware_version_fops); + debugfs_create_file("pcb_version", 0444, mcu->debugfs, mcu, + &pcb_version_fops); + debugfs_create_file("mcu_type", 0444, mcu->debugfs, mcu, + &mcu_type_fops); + debugfs_create_file("board_type", 0444, mcu->debugfs, mcu, + &board_type_fops); + } +} + +static int sg2042_mcu_i2c_probe(struct i2c_client *client) +{ + struct device *dev = &client->dev; + struct sg2042_mcu_data *mcu; + struct device *hwmon_dev; + + if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA | + I2C_FUNC_SMBUS_BLOCK_DATA)) + return -EIO; + + mcu = devm_kmalloc(dev, sizeof(*mcu), GFP_KERNEL); + if (!mcu) + return -ENOMEM; + + mutex_init(&mcu->mutex); + mcu->client = client; + + i2c_set_clientdata(client, mcu); + + hwmon_dev = devm_hwmon_device_register_with_info(dev, "sg2042_mcu", + mcu, + &sg2042_mcu_chip_info, + NULL); + if (IS_ERR_OR_NULL(hwmon_dev)) + return -EFAULT; + + sg2042_mcu_debugfs_init(mcu, dev); + + return 0; +} + +static void sg2042_mcu_i2c_remove(struct i2c_client *client) +{ + struct sg2042_mcu_data *mcu = i2c_get_clientdata(client); + + debugfs_remove_recursive(mcu->debugfs); +} + +static const struct i2c_device_id sg2042_mcu_id[] = { + { "sg2042-hwmon-mcu", 0 }, + {}, +}; +MODULE_DEVICE_TABLE(i2c, sg2042_mcu_id); + +static const struct of_device_id sg2042_mcu_of_id[] = { + { .compatible = "sophgo,sg2042-hwmon-mcu" }, + {}, +}; +MODULE_DEVICE_TABLE(of, sg2042_mcu_of_id); + +static struct i2c_driver sg2042_mcu_driver = { + .driver = { + .name = "sg2042-mcu", + .of_match_table = sg2042_mcu_of_id, + .dev_groups = sg2042_mcu_groups, + }, + .probe = sg2042_mcu_i2c_probe, + .remove = sg2042_mcu_i2c_remove, + .id_table = sg2042_mcu_id, +}; + +static int __init sg2042_mcu_init(void) +{ + sgmcu_debugfs = debugfs_create_dir("sg2042-mcu", NULL); + return i2c_add_driver(&sg2042_mcu_driver); +} + +static void __exit sg2042_mcu_exit(void) +{ + debugfs_remove_recursive(sgmcu_debugfs); + i2c_del_driver(&sg2042_mcu_driver); 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X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org Add mcu device and thermal zones node for Milk-V Pioneer. Signed-off-by: Inochi Amaoto Tested-by: Chen Wang Reviewed-by: Chen Wang --- .../boot/dts/sophgo/sg2042-milkv-pioneer.dts | 60 +++++++++++++++++++ 1 file changed, 60 insertions(+) diff --git a/arch/riscv/boot/dts/sophgo/sg2042-milkv-pioneer.dts b/arch/riscv/boot/dts/sophgo/sg2042-milkv-pioneer.dts index 80cb017974d8..8b8fdf6243d4 100644 --- a/arch/riscv/boot/dts/sophgo/sg2042-milkv-pioneer.dts +++ b/arch/riscv/boot/dts/sophgo/sg2042-milkv-pioneer.dts @@ -26,6 +26,66 @@ &cgi_dpll1 { clock-frequency = <25000000>; }; +&i2c1 { + status = "okay"; + + mcu: syscon@17 { + compatible = "sophgo,sg2042-hwmon-mcu"; + reg = <0x17>; + #thermal-sensor-cells = <1>; + }; +}; + &uart0 { status = "okay"; }; + +/ { + thermal-zones { + soc-thermal { + polling-delay-passive = <1000>; + polling-delay = <1000>; + thermal-sensors = <&mcu 0>; + + trips { + soc_active1: soc-active1 { + temperature = <30000>; + hysteresis = <8000>; + type = "active"; + }; + + soc_active2: soc-active2 { + temperature = <58000>; + hysteresis = <12000>; + type = "active"; + }; + + soc_active3: soc-active3 { + temperature = <70000>; + hysteresis = <10000>; + type = "active"; + }; + + soc_hot: soc-hot { + temperature = <85000>; + hysteresis = <5000>; + type = "hot"; + }; + }; + }; + + board-thermal { + polling-delay-passive = <1000>; + polling-delay = <1000>; + thermal-sensors = <&mcu 1>; + + trips { + board_active: board-active { + temperature = <75000>; + hysteresis = <8000>; + type = "active"; + }; + }; + }; + }; +}; From patchwork Fri Aug 2 12:38:41 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Inochi Amaoto X-Patchwork-Id: 13751538 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id A6633C52D6F for ; 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Signed-off-by: Inochi Amaoto Tested-by: Chen Wang Reviewed-by: Chen Wang --- arch/riscv/boot/dts/sophgo/sg2042-milkv-pioneer.dts | 2 +- arch/riscv/configs/defconfig | 1 + 2 files changed, 2 insertions(+), 1 deletion(-) diff --git a/arch/riscv/boot/dts/sophgo/sg2042-milkv-pioneer.dts b/arch/riscv/boot/dts/sophgo/sg2042-milkv-pioneer.dts index 8b8fdf6243d4..76375e25a495 100644 --- a/arch/riscv/boot/dts/sophgo/sg2042-milkv-pioneer.dts +++ b/arch/riscv/boot/dts/sophgo/sg2042-milkv-pioneer.dts @@ -67,7 +67,7 @@ soc_active3: soc-active3 { }; soc_hot: soc-hot { - temperature = <85000>; + temperature = <80000>; hysteresis = <5000>; type = "hot"; }; diff --git a/arch/riscv/configs/defconfig b/arch/riscv/configs/defconfig index 0d678325444f..a0f346301df6 100644 --- a/arch/riscv/configs/defconfig +++ b/arch/riscv/configs/defconfig @@ -170,6 +170,7 @@ CONFIG_SPI_SUN6I=y CONFIG_GPIO_SIFIVE=y CONFIG_POWER_RESET_GPIO_RESTART=y CONFIG_SENSORS_SFCTEMP=m +CONFIG_SENSORS_SG2042_MCU=y CONFIG_CPU_THERMAL=y CONFIG_DEVFREQ_THERMAL=y CONFIG_RZG2L_THERMAL=y