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Ip=[66.35.236.236]; Helo=[sj-itexedge04.altera.priv.altera.com] X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: CY1PR03MB2284 Sender: linux-gpio-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-gpio@vger.kernel.org From: Thor Thayer This patch adds the power supply alarms of the hwmon framework to the Arria10 System Resource chip. Signed-off-by: Thor Thayer --- drivers/hwmon/Kconfig | 9 ++ drivers/hwmon/Makefile | 1 + drivers/hwmon/altera-a10sr-hwmon.c | 215 ++++++++++++++++++++++++++++++++++++ 3 files changed, 225 insertions(+) create mode 100644 drivers/hwmon/altera-a10sr-hwmon.c diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig index ff94007..af08846 100644 --- a/drivers/hwmon/Kconfig +++ b/drivers/hwmon/Kconfig @@ -248,6 +248,15 @@ config SENSORS_ADT7475 This driver can also be build as a module. If so, the module will be called adt7475. +config SENSORS_ALTERA_A10SR + bool "Altera Arria10 System Status" + depends on MFD_ALTERA_A10SR + help + If you say yes here you get support for the power ready status + for the Arria10's external power supplies on the Arria10 DevKit. + These values are read over the SPI bus from the Arria10 System + Resource chip. + config SENSORS_ASC7621 tristate "Andigilog aSC7621" depends on I2C diff --git a/drivers/hwmon/Makefile b/drivers/hwmon/Makefile index 2ef5b7c..17d72a7 100644 --- a/drivers/hwmon/Makefile +++ b/drivers/hwmon/Makefile @@ -43,6 +43,7 @@ obj-$(CONFIG_SENSORS_ADT7411) += adt7411.o obj-$(CONFIG_SENSORS_ADT7462) += adt7462.o obj-$(CONFIG_SENSORS_ADT7470) += adt7470.o obj-$(CONFIG_SENSORS_ADT7475) += adt7475.o +obj-$(CONFIG_SENSORS_ALTERA_A10SR) += altera-a10sr-hwmon.o obj-$(CONFIG_SENSORS_APPLESMC) += applesmc.o obj-$(CONFIG_SENSORS_ARM_SCPI) += scpi-hwmon.o obj-$(CONFIG_SENSORS_ASC7621) += asc7621.o diff --git a/drivers/hwmon/altera-a10sr-hwmon.c b/drivers/hwmon/altera-a10sr-hwmon.c new file mode 100644 index 0000000..1eecc6b --- /dev/null +++ b/drivers/hwmon/altera-a10sr-hwmon.c @@ -0,0 +1,215 @@ +/* + * Copyright Altera Corporation (C) 2014-2016. All Rights Reserved + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + * You should have received a copy of the GNU General Public License along with + * this program. If not, see . + * + * HW Monitor driver for Altera Arria10 MAX5 System Resource Chip + * Adapted from DA9052 + */ + +#include +#include +#include +#include +#include + +#define ALTR_A10SR_1V0_BIT_POS ALTR_A10SR_PG1_1V0_SHIFT +#define ALTR_A10SR_0V95_BIT_POS ALTR_A10SR_PG1_0V95_SHIFT +#define ALTR_A10SR_0V9_BIT_POS ALTR_A10SR_PG1_0V9_SHIFT +#define ALTR_A10SR_10V_BIT_POS ALTR_A10SR_PG1_10V_SHIFT +#define ALTR_A10SR_5V0_BIT_POS ALTR_A10SR_PG1_5V0_SHIFT +#define ALTR_A10SR_3V3_BIT_POS ALTR_A10SR_PG1_3V3_SHIFT +#define ALTR_A10SR_2V5_BIT_POS ALTR_A10SR_PG1_2V5_SHIFT +#define ALTR_A10SR_1V8_BIT_POS ALTR_A10SR_PG1_1V8_SHIFT +#define ALTR_A10SR_OP_FLAG_BIT_POS ALTR_A10SR_PG1_OP_FLAG_SHIFT +/* 2nd register needs an offset of 8 to get to 2nd register */ +#define ALTR_A10SR_FBC2MP_BIT_POS (8 + ALTR_A10SR_PG2_FBC2MP_SHIFT) +#define ALTR_A10SR_FAC2MP_BIT_POS (8 + ALTR_A10SR_PG2_FAC2MP_SHIFT) +#define ALTR_A10SR_FMCBVADJ_BIT_POS (8 + ALTR_A10SR_PG2_FMCBVADJ_SHIFT) +#define ALTR_A10SR_FMCAVADJ_BIT_POS (8 + ALTR_A10SR_PG2_FMCAVADJ_SHIFT) +#define ALTR_A10SR_HL_VDDQ_BIT_POS (8 + ALTR_A10SR_PG2_HL_VDDQ_SHIFT) +#define ALTR_A10SR_HL_VDD_BIT_POS (8 + ALTR_A10SR_PG2_HL_VDD_SHIFT) +#define ALTR_A10SR_HL_HPS_BIT_POS (8 + ALTR_A10SR_PG2_HL_HPS_SHIFT) +#define ALTR_A10SR_HPS_BIT_POS (8 + ALTR_A10SR_PG2_HPS_SHIFT) +/* 3rd register needs an offset of 16 to get to 3rd register */ +#define ALTR_A10SR_10V_FAIL_BIT_POS (16 + ALTR_A10SR_PG3_10V_FAIL_SHIFT) +#define ALTR_A10SR_FAM2C_BIT_POS (16 + ALTR_A10SR_PG3_FAM2C_SHIFT) + +/** + * struct altr_a10sr_hwmon - Altera Max5 HWMON device private data structure + * @device: hwmon class. + * @regmap: the regmap from the parent device. + */ +struct altr_a10sr_hwmon { + struct device *class_device; + struct regmap *regmap; +}; + +static ssize_t altr_a10sr_read_status(struct device *dev, + struct device_attribute *devattr, + char *buf) +{ + struct altr_a10sr_hwmon *hwmon = dev_get_drvdata(dev); + int val, ret, index = to_sensor_dev_attr(devattr)->index; + int mask = ALTR_A10SR_REG_BIT_MASK(index); + unsigned char reg = ALTR_A10SR_PWR_GOOD1_REG + + ALTR_A10SR_REG_OFFSET(index); + + ret = regmap_read(hwmon->regmap, reg, &val); + if (ret < 0) + return ret; + + return sprintf(buf, "%d\n", !!(~val & mask)); +} + +static ssize_t altr_a10sr_hwmon_show_name(struct device *dev, + struct device_attribute *devattr, + char *buf) +{ + return sprintf(buf, "altr_a10sr\n"); +} + +/* First Power Good Register Bits */ +static SENSOR_DEVICE_ATTR(1v0_alarm, S_IRUGO, altr_a10sr_read_status, NULL, + ALTR_A10SR_1V0_BIT_POS); +static SENSOR_DEVICE_ATTR(0v95_alarm, S_IRUGO, altr_a10sr_read_status, NULL, + ALTR_A10SR_0V95_BIT_POS); +static SENSOR_DEVICE_ATTR(0v9_alarm, S_IRUGO, altr_a10sr_read_status, NULL, + ALTR_A10SR_0V9_BIT_POS); +static SENSOR_DEVICE_ATTR(5v0_alarm, S_IRUGO, altr_a10sr_read_status, NULL, + ALTR_A10SR_5V0_BIT_POS); +static SENSOR_DEVICE_ATTR(3v3_alarm, S_IRUGO, altr_a10sr_read_status, NULL, + ALTR_A10SR_3V3_BIT_POS); +static SENSOR_DEVICE_ATTR(2v5_alarm, S_IRUGO, altr_a10sr_read_status, NULL, + ALTR_A10SR_2V5_BIT_POS); +static SENSOR_DEVICE_ATTR(1v8_alarm, S_IRUGO, altr_a10sr_read_status, NULL, + ALTR_A10SR_1V8_BIT_POS); +static SENSOR_DEVICE_ATTR(opflag_alarm, S_IRUGO, altr_a10sr_read_status, NULL, + ALTR_A10SR_OP_FLAG_BIT_POS); +/* Second Power Good Register Bits */ +static SENSOR_DEVICE_ATTR(fbc2mp_alarm, S_IRUGO, altr_a10sr_read_status, NULL, + ALTR_A10SR_FBC2MP_BIT_POS); +static SENSOR_DEVICE_ATTR(fac2mp_alarm, S_IRUGO, altr_a10sr_read_status, NULL, + ALTR_A10SR_FAC2MP_BIT_POS); +static SENSOR_DEVICE_ATTR(fmcbvadj_alarm, S_IRUGO, altr_a10sr_read_status, NULL, + ALTR_A10SR_FMCBVADJ_BIT_POS); +static SENSOR_DEVICE_ATTR(fmcavadj_alarm, S_IRUGO, altr_a10sr_read_status, NULL, + ALTR_A10SR_FMCAVADJ_BIT_POS); +static SENSOR_DEVICE_ATTR(hl_vddq_alarm, S_IRUGO, altr_a10sr_read_status, NULL, + ALTR_A10SR_HL_VDDQ_BIT_POS); +static SENSOR_DEVICE_ATTR(hl_vdd_alarm, S_IRUGO, altr_a10sr_read_status, NULL, + ALTR_A10SR_HL_VDD_BIT_POS); +static SENSOR_DEVICE_ATTR(hlhps_vdd_alarm, S_IRUGO, altr_a10sr_read_status, + NULL, ALTR_A10SR_HL_HPS_BIT_POS); +static SENSOR_DEVICE_ATTR(hps_alarm, S_IRUGO, altr_a10sr_read_status, NULL, + ALTR_A10SR_HPS_BIT_POS); +/* Third Power Good Register Bits */ +static SENSOR_DEVICE_ATTR(10v_alarm, S_IRUGO, altr_a10sr_read_status, + NULL, ALTR_A10SR_10V_FAIL_BIT_POS); +static SENSOR_DEVICE_ATTR(fam2c_alarm, S_IRUGO, altr_a10sr_read_status, NULL, + ALTR_A10SR_FAM2C_BIT_POS); + +static DEVICE_ATTR(name, S_IRUGO, altr_a10sr_hwmon_show_name, NULL); + +static struct attribute *altr_a10sr_attr[] = { + &dev_attr_name.attr, + /* First Power Good Register */ + &sensor_dev_attr_opflag_alarm.dev_attr.attr, + &sensor_dev_attr_1v8_alarm.dev_attr.attr, + &sensor_dev_attr_2v5_alarm.dev_attr.attr, + &sensor_dev_attr_1v0_alarm.dev_attr.attr, + &sensor_dev_attr_3v3_alarm.dev_attr.attr, + &sensor_dev_attr_5v0_alarm.dev_attr.attr, + &sensor_dev_attr_0v9_alarm.dev_attr.attr, + &sensor_dev_attr_0v95_alarm.dev_attr.attr, + /* Second Power Good Register */ + &sensor_dev_attr_hps_alarm.dev_attr.attr, + &sensor_dev_attr_hlhps_vdd_alarm.dev_attr.attr, + &sensor_dev_attr_hl_vdd_alarm.dev_attr.attr, + &sensor_dev_attr_hl_vddq_alarm.dev_attr.attr, + &sensor_dev_attr_fmcavadj_alarm.dev_attr.attr, + &sensor_dev_attr_fmcbvadj_alarm.dev_attr.attr, + &sensor_dev_attr_fac2mp_alarm.dev_attr.attr, + &sensor_dev_attr_fbc2mp_alarm.dev_attr.attr, + /* Third Power Good Register */ + &sensor_dev_attr_10v_alarm.dev_attr.attr, + &sensor_dev_attr_fam2c_alarm.dev_attr.attr, + NULL +}; + +static const struct attribute_group altr_a10sr_attr_group = { + .attrs = altr_a10sr_attr +}; + +static int altr_a10sr_hwmon_probe(struct platform_device *pdev) +{ + struct altr_a10sr_hwmon *hwmon; + int ret; + struct altr_a10sr *a10sr = dev_get_drvdata(pdev->dev.parent); + + hwmon = devm_kzalloc(&pdev->dev, sizeof(*hwmon), GFP_KERNEL); + if (!hwmon) + return -ENOMEM; + + hwmon->regmap = a10sr->regmap; + + platform_set_drvdata(pdev, hwmon); + + ret = sysfs_create_group(&pdev->dev.kobj, &altr_a10sr_attr_group); + if (ret) + goto err_mem; + + hwmon->class_device = hwmon_device_register(&pdev->dev); + if (IS_ERR(hwmon->class_device)) { + ret = PTR_ERR(hwmon->class_device); + goto err_sysfs; + } + + return 0; + +err_sysfs: + sysfs_remove_group(&pdev->dev.kobj, &altr_a10sr_attr_group); +err_mem: + return ret; +} + +static int altr_a10sr_hwmon_remove(struct platform_device *pdev) +{ + struct altr_a10sr_hwmon *hwmon = platform_get_drvdata(pdev); + + hwmon_device_unregister(hwmon->class_device); + sysfs_remove_group(&pdev->dev.kobj, &altr_a10sr_attr_group); + + return 0; +} + +static const struct of_device_id altr_a10sr_hwmon_of_match[] = { + { .compatible = "altr,a10sr-hwmon" }, + { }, +}; +MODULE_DEVICE_TABLE(of, altr_a10sr_hwmon_of_match); + +static struct platform_driver altr_a10sr_hwmon_driver = { + .probe = altr_a10sr_hwmon_probe, + .remove = altr_a10sr_hwmon_remove, + .driver = { + .name = "altr_a10sr_hwmon", + .of_match_table = of_match_ptr(altr_a10sr_hwmon_of_match), + }, +}; + +module_platform_driver(altr_a10sr_hwmon_driver); + +MODULE_LICENSE("GPL v2"); +MODULE_AUTHOR("Thor Thayer "); +MODULE_DESCRIPTION("HW Monitor driver for Altera Arria10 System Resource Chip");