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Sat, 9 Oct 2021 07:51:30 -0400 (EDT) From: Alistair Francis To: lee.jones@linaro.org, robh+dt@kernel.org, lgirdwood@gmail.com, broonie@kernel.org, kernel@pengutronix.de Cc: shawnguo@kernel.org, s.hauer@pengutronix.de, linux-imx@nxp.com, amitk@kernel.org, rui.zhang@intel.com, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, alistair23@gmail.com, linux-hwmon@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-pm@vger.kernel.org, Alistair Francis Subject: [PATCH v12 06/10] hwmon: sy7636a: Add temperature driver for sy7636a Date: Sat, 9 Oct 2021 21:50:28 +1000 Message-Id: <20211009115031.18392-10-alistair@alistair23.me> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20211009115031.18392-1-alistair@alistair23.me> References: <20211009115031.18392-1-alistair@alistair23.me> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20211009_045136_706929_8520204E X-CRM114-Status: GOOD ( 17.46 ) X-Spam-Score: -0.9 (/) X-Spam-Report: Spam detection software, running on the system "bombadil.infradead.org", has NOT identified this incoming email as spam. The original message has been attached to this so you can view it or label similar future email. If you have any questions, see the administrator of that system for details. Content preview: This is a multi-function device to interface with the sy7636a EPD PMIC chip from Silergy. Signed-off-by: Alistair Francis --- arch/arm/configs/imx_v6_v7_defconfig | 1 + drivers/hwmon/Kconfig | 10 ++++ drivers/hwmon/Makefile | 1 + drivers/hwmon/sy7636a-hwmon.c | 77 [...] Content analysis details: (-0.9 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.7 RCVD_IN_DNSWL_LOW RBL: Sender listed at https://www.dnswl.org/, low trust [66.111.4.229 listed in list.dnswl.org] -0.0 SPF_PASS SPF: sender matches SPF record -0.0 SPF_HELO_PASS SPF: HELO matches SPF record -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID_EF Message has a valid DKIM or DK signature from envelope-from domain X-BeenThere: linux-arm-kernel@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-arm-kernel" Errors-To: linux-arm-kernel-bounces+incoming-imx=patchwork.ozlabs.org@lists.infradead.org This is a multi-function device to interface with the sy7636a EPD PMIC chip from Silergy. Signed-off-by: Alistair Francis --- arch/arm/configs/imx_v6_v7_defconfig | 1 + drivers/hwmon/Kconfig | 10 ++++ drivers/hwmon/Makefile | 1 + drivers/hwmon/sy7636a-hwmon.c | 77 ++++++++++++++++++++++++++++ 4 files changed, 89 insertions(+) create mode 100644 drivers/hwmon/sy7636a-hwmon.c diff --git a/arch/arm/configs/imx_v6_v7_defconfig b/arch/arm/configs/imx_v6_v7_defconfig index 8a54a4d0181a..b87adf823e44 100644 --- a/arch/arm/configs/imx_v6_v7_defconfig +++ b/arch/arm/configs/imx_v6_v7_defconfig @@ -228,6 +228,7 @@ CONFIG_RN5T618_POWER=m CONFIG_SENSORS_MC13783_ADC=y CONFIG_SENSORS_GPIO_FAN=y CONFIG_SENSORS_IIO_HWMON=y +CONFIG_SENSORS_SY7636A=y CONFIG_THERMAL_STATISTICS=y CONFIG_THERMAL_WRITABLE_TRIPS=y CONFIG_CPU_THERMAL=y diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig index c4578e8f34bb..59f358293202 100644 --- a/drivers/hwmon/Kconfig +++ b/drivers/hwmon/Kconfig @@ -1651,6 +1651,16 @@ config SENSORS_SIS5595 This driver can also be built as a module. If so, the module will be called sis5595. +config SENSORS_SY7636A + tristate "Silergy SY7636A" + depends on I2C + help + If you say yes here you get support for the thermistor readout of + the Silergy SY7636A PMIC. + + This driver can also be built as a module. If so, the module + will be called sy7636a-hwmon. + config SENSORS_DME1737 tristate "SMSC DME1737, SCH311x and compatibles" depends on I2C && !PPC diff --git a/drivers/hwmon/Makefile b/drivers/hwmon/Makefile index 162940270661..1355ffdb1481 100644 --- a/drivers/hwmon/Makefile +++ b/drivers/hwmon/Makefile @@ -181,6 +181,7 @@ obj-$(CONFIG_SENSORS_SMSC47M1) += smsc47m1.o obj-$(CONFIG_SENSORS_SMSC47M192)+= smsc47m192.o obj-$(CONFIG_SENSORS_SPARX5) += sparx5-temp.o obj-$(CONFIG_SENSORS_STTS751) += stts751.o +obj-$(CONFIG_SENSORS_SY7636A) += sy7636a-hwmon.o obj-$(CONFIG_SENSORS_AMC6821) += amc6821.o obj-$(CONFIG_SENSORS_TC74) += tc74.o obj-$(CONFIG_SENSORS_THMC50) += thmc50.o diff --git a/drivers/hwmon/sy7636a-hwmon.c b/drivers/hwmon/sy7636a-hwmon.c new file mode 100644 index 000000000000..e0204278339b --- /dev/null +++ b/drivers/hwmon/sy7636a-hwmon.c @@ -0,0 +1,77 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Functions to access SY3686A power management chip temperature + * + * Copyright (C) 2019 reMarkable AS - http://www.remarkable.com/ + * + * Authors: Lars Ivar Miljeteig + * Alistair Francis + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include + +static ssize_t show_temp(struct device *dev, + struct device_attribute *attr, char *buf) +{ + unsigned int reg_val; + struct regmap *regmap = dev_get_drvdata(dev); + int ret; + + ret = regmap_read(regmap, + SY7636A_REG_TERMISTOR_READOUT, ®_val); + if (ret) + return ret; + + return snprintf(buf, PAGE_SIZE, "%d\n", reg_val); +} + +static SENSOR_DEVICE_ATTR(temp0, 0444, show_temp, NULL, 0); + +static struct attribute *sy7636a_attrs[] = { + &sensor_dev_attr_temp0.dev_attr.attr, + NULL +}; + +ATTRIBUTE_GROUPS(sy7636a); + +static int sy7636a_sensor_probe(struct platform_device *pdev) +{ + struct regmap *regmap = dev_get_regmap(pdev->dev.parent, NULL); + struct device *hwmon_dev; + int err; + + if (!regmap) + return -EPROBE_DEFER; + + hwmon_dev = devm_hwmon_device_register_with_groups(&pdev->dev, + "sy7636a_temperature", regmap, sy7636a_groups); + + if (IS_ERR(hwmon_dev)) { + err = PTR_ERR(hwmon_dev); + dev_err(&pdev->dev, "Unable to register hwmon device, returned %d", err); + return err; + } + + return 0; +} + +static struct platform_driver sy7636a_sensor_driver = { + .probe = sy7636a_sensor_probe, + .driver = { + .name = "sy7636a-temperature", + }, +}; +module_platform_driver(sy7636a_sensor_driver); + +MODULE_DESCRIPTION("SY7636A sensor driver"); +MODULE_LICENSE("GPL");