| Message ID | 1461339219-15255-11-git-send-email-tthayer@opensource.altera.com |
|---|---|
| State | New |
| Headers | show |
On Fri, Apr 22, 2016 at 10:33:38AM -0500, tthayer@opensource.altera.com wrote: > From: Thor Thayer <tthayer@opensource.altera.com> > > This patch adds the power supply alarms of the hwmon framework > to the Arria10 System Resource chip. > > Signed-off-by: Thor Thayer <tthayer@opensource.altera.com> > --- Please read and follow Documentation/hwmon/sysfs-interface as well as Documentation/hwmon/submitting-patches. At the very least, you are expected to document your driver, and you are expected to use standard attribute names. > 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 <http://www.gnu.org/licenses/>. > + * > + * HW Monitor driver for Altera Arria10 MAX5 System Resource Chip > + * Adapted from DA9052 > + */ > + > +#include <linux/hwmon.h> > +#include <linux/hwmon-sysfs.h> > +#include <linux/mfd/altera-a10sr.h> > +#include <linux/module.h> > +#include <linux/of.h> Please list include files in alphabetic order. > + > +#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); The pointer parameter to regmap_read() is unsigned int. I would suggest to use the same variable type to avoid surprises. > + if (ret < 0) > + return ret; > + > + return sprintf(buf, "%d\n", !!(~val & mask)); Are alarms all active low ? > +} > + > +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, Ultimately, this doesn't really make much sense, even with standard attribute names. The ABI assumes that _input attrributes exist. Not sure if that could be solved by providing 'dummy' unreadable input attributes (permission 0); that might be worth a try. If you want to attach names to the attributes, you would need to provide label attributes. Specifically you would need inX_input (with permission 0) - not sure if that is even possible inX_alarm inX_label > + 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); > + What if someone creates a stand-alone devicetree property for this driver, and there is no parent (or parent driver data) ? > + 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; > + } Please use devm_hwmon_device_register_with_groups(). > + > + 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 <tthayer@opensource.altera.com>"); > +MODULE_DESCRIPTION("HW Monitor driver for Altera Arria10 System Resource Chip"); > -- > 1.7.9.5 > -- To unsubscribe from this list: send the line "unsubscribe linux-gpio" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On 04/22/2016 05:24 PM, Guenter Roeck wrote: > On Fri, Apr 22, 2016 at 10:33:38AM -0500, tthayer@opensource.altera.com wrote: >> From: Thor Thayer <tthayer@opensource.altera.com> >> >> This patch adds the power supply alarms of the hwmon framework >> to the Arria10 System Resource chip. >> >> Signed-off-by: Thor Thayer <tthayer@opensource.altera.com> >> --- > > Please read and follow Documentation/hwmon/sysfs-interface > as well as Documentation/hwmon/submitting-patches. At the very least, > you are expected to document your driver, and you are expected to > use standard attribute names. > OK. I misunderstood. The standard attribute names would be power[1-*]_alarm and the binding documentation the a10sr-hwmon portion for MFD doesn't cover this. >> 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 <http://www.gnu.org/licenses/>. >> + * >> + * HW Monitor driver for Altera Arria10 MAX5 System Resource Chip >> + * Adapted from DA9052 >> + */ >> + >> +#include <linux/hwmon.h> >> +#include <linux/hwmon-sysfs.h> >> +#include <linux/mfd/altera-a10sr.h> >> +#include <linux/module.h> >> +#include <linux/of.h> > > Please list include files in alphabetic order. > OK. I thought this was in alphabetical order. I'll update this after figuring out where I was wrong. >> + >> +#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); > > The pointer parameter to regmap_read() is unsigned int. I would suggest > to use the same variable type to avoid surprises. > Understood. Thanks. >> + if (ret < 0) >> + return ret; >> + >> + return sprintf(buf, "%d\n", !!(~val & mask)); > > Are alarms all active low ? > Yes, They are actually Power Good signals (Good = high) so I'm inverting. >> +} >> + >> +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, > > Ultimately, this doesn't really make much sense, even with standard attribute > names. The ABI assumes that _input attrributes exist. Not sure if that could > be solved by providing 'dummy' unreadable input attributes (permission 0); > that might be worth a try. If you want to attach names to the attributes, > you would need to provide label attributes. Specifically you would need > > inX_input (with permission 0) - not sure if that is even possible > inX_alarm > inX_label > Hmm. OK. I may need to rethink this. >> + 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); >> + > > What if someone creates a stand-alone devicetree property for this driver, > and there is no parent (or parent driver data) ? > I agree if this was a commercially available part. However, this is a specific driver for a programmable logic device (PLD) that will always be part of an MFD parent. The PLD only supports the Altera Development Kit. >> + 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; >> + } > > Please use devm_hwmon_device_register_with_groups(). > Understood. Thanks. Thanks for reviewing. >> + >> + 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 <tthayer@opensource.altera.com>"); >> +MODULE_DESCRIPTION("HW Monitor driver for Altera Arria10 System Resource Chip"); >> -- >> 1.7.9.5 >> -- To unsubscribe from this list: send the line "unsubscribe linux-gpio" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On 04/25/2016 07:41 AM, Thor Thayer wrote: > > > On 04/22/2016 05:24 PM, Guenter Roeck wrote: >> On Fri, Apr 22, 2016 at 10:33:38AM -0500, tthayer@opensource.altera.com wrote: >>> From: Thor Thayer <tthayer@opensource.altera.com> >>> >>> This patch adds the power supply alarms of the hwmon framework >>> to the Arria10 System Resource chip. >>> >>> Signed-off-by: Thor Thayer <tthayer@opensource.altera.com> >>> --- >> >> Please read and follow Documentation/hwmon/sysfs-interface >> as well as Documentation/hwmon/submitting-patches. At the very least, >> you are expected to document your driver, and you are expected to >> use standard attribute names. >> > > OK. I misunderstood. The standard attribute names would be power[1-*]_alarm and the binding documentation the a10sr-hwmon portion for MFD doesn't cover this. > power ? Why power ? The names suggest those are voltages. Also not sure why those names would be in the bindings. >>> 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 <http://www.gnu.org/licenses/>. >>> + * >>> + * HW Monitor driver for Altera Arria10 MAX5 System Resource Chip >>> + * Adapted from DA9052 >>> + */ >>> + >>> +#include <linux/hwmon.h> >>> +#include <linux/hwmon-sysfs.h> >>> +#include <linux/mfd/altera-a10sr.h> >>> +#include <linux/module.h> >>> +#include <linux/of.h> >> >> Please list include files in alphabetic order. >> > > OK. I thought this was in alphabetical order. I'll update this after figuring out where I was wrong. > Sorry, PBKAC on my side. Guenter >>> + >>> +#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); >> >> The pointer parameter to regmap_read() is unsigned int. I would suggest >> to use the same variable type to avoid surprises. >> > Understood. Thanks. > >>> + if (ret < 0) >>> + return ret; >>> + >>> + return sprintf(buf, "%d\n", !!(~val & mask)); >> >> Are alarms all active low ? >> > Yes, They are actually Power Good signals (Good = high) so I'm inverting. > >>> +} >>> + >>> +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, >> >> Ultimately, this doesn't really make much sense, even with standard attribute >> names. The ABI assumes that _input attrributes exist. Not sure if that could >> be solved by providing 'dummy' unreadable input attributes (permission 0); >> that might be worth a try. If you want to attach names to the attributes, >> you would need to provide label attributes. Specifically you would need >> >> inX_input (with permission 0) - not sure if that is even possible >> inX_alarm >> inX_label >> > Hmm. OK. I may need to rethink this. > >>> + 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); >>> + >> >> What if someone creates a stand-alone devicetree property for this driver, >> and there is no parent (or parent driver data) ? >> > I agree if this was a commercially available part. However, this is a specific driver for a programmable logic device (PLD) that will always be part of an MFD parent. The PLD only supports the Altera Development Kit. > >>> + 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; >>> + } >> >> Please use devm_hwmon_device_register_with_groups(). >> > Understood. Thanks. > > Thanks for reviewing. > >>> + >>> + 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 <tthayer@opensource.altera.com>"); >>> +MODULE_DESCRIPTION("HW Monitor driver for Altera Arria10 System Resource Chip"); >>> -- >>> 1.7.9.5 >>> > -- To unsubscribe from this list: send the line "unsubscribe linux-gpio" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On 04/25/2016 09:58 AM, Guenter Roeck wrote: > On 04/25/2016 07:41 AM, Thor Thayer wrote: >> >> >> On 04/22/2016 05:24 PM, Guenter Roeck wrote: >>> On Fri, Apr 22, 2016 at 10:33:38AM -0500, >>> tthayer@opensource.altera.com wrote: >>>> From: Thor Thayer <tthayer@opensource.altera.com> >>>> >>>> This patch adds the power supply alarms of the hwmon framework >>>> to the Arria10 System Resource chip. >>>> >>>> Signed-off-by: Thor Thayer <tthayer@opensource.altera.com> >>>> --- >>> >>> Please read and follow Documentation/hwmon/sysfs-interface >>> as well as Documentation/hwmon/submitting-patches. At the very least, >>> you are expected to document your driver, and you are expected to >>> use standard attribute names. >>> >> >> OK. I misunderstood. The standard attribute names would be >> power[1-*]_alarm and the binding documentation the a10sr-hwmon portion >> for MFD doesn't cover this. >> > > power ? Why power ? The names suggest those are voltages. > Also not sure why those names would be in the bindings. > Yes, you are correct. I should be using in[0-*]_lcrit_alarm. I didn't phrase my reply clearly. It was my initial understanding that the binding documentation for the MFD would cover the documentation for the driver. I missed that I needed to add the documentation into Documentation/hwmon/altera-a10sr-hwmon.c but I will fix this oversight. Thanks. >>>> 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 <http://www.gnu.org/licenses/>. >>>> + * >>>> + * HW Monitor driver for Altera Arria10 MAX5 System Resource Chip >>>> + * Adapted from DA9052 >>>> + */ >>>> + >>>> +#include <linux/hwmon.h> >>>> +#include <linux/hwmon-sysfs.h> >>>> +#include <linux/mfd/altera-a10sr.h> >>>> +#include <linux/module.h> >>>> +#include <linux/of.h> >>> >>> Please list include files in alphabetic order. >>> >> >> OK. I thought this was in alphabetical order. I'll update this after >> figuring out where I was wrong. >> > > Sorry, PBKAC on my side. > > Guenter > >>>> + >>>> +#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); >>> >>> The pointer parameter to regmap_read() is unsigned int. I would suggest >>> to use the same variable type to avoid surprises. >>> >> Understood. Thanks. >> >>>> + if (ret < 0) >>>> + return ret; >>>> + >>>> + return sprintf(buf, "%d\n", !!(~val & mask)); >>> >>> Are alarms all active low ? >>> >> Yes, They are actually Power Good signals (Good = high) so I'm inverting. >> >>>> +} >>>> + >>>> +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, >>> >>> Ultimately, this doesn't really make much sense, even with standard >>> attribute >>> names. The ABI assumes that _input attrributes exist. Not sure if >>> that could >>> be solved by providing 'dummy' unreadable input attributes >>> (permission 0); >>> that might be worth a try. If you want to attach names to the >>> attributes, >>> you would need to provide label attributes. Specifically you would need >>> >>> inX_input (with permission 0) - not sure if that is even possible >>> inX_alarm >>> inX_label >>> >> Hmm. OK. I may need to rethink this. >> >>>> + 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); >>>> + >>> >>> What if someone creates a stand-alone devicetree property for this >>> driver, >>> and there is no parent (or parent driver data) ? >>> >> I agree if this was a commercially available part. However, this is a >> specific driver for a programmable logic device (PLD) that will always >> be part of an MFD parent. The PLD only supports the Altera Development >> Kit. >> >>>> + 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; >>>> + } >>> >>> Please use devm_hwmon_device_register_with_groups(). >>> >> Understood. Thanks. >> >> Thanks for reviewing. >> >>>> + >>>> + 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 <tthayer@opensource.altera.com>"); >>>> +MODULE_DESCRIPTION("HW Monitor driver for Altera Arria10 System >>>> Resource Chip"); >>>> -- >>>> 1.7.9.5 >>>> >> > -- To unsubscribe from this list: send the line "unsubscribe linux-gpio" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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 <http://www.gnu.org/licenses/>. + * + * HW Monitor driver for Altera Arria10 MAX5 System Resource Chip + * Adapted from DA9052 + */ + +#include <linux/hwmon.h> +#include <linux/hwmon-sysfs.h> +#include <linux/mfd/altera-a10sr.h> +#include <linux/module.h> +#include <linux/of.h> + +#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 <tthayer@opensource.altera.com>"); +MODULE_DESCRIPTION("HW Monitor driver for Altera Arria10 System Resource Chip");