diff for duplicates of <5382DD9B.2020406@linux.vnet.ibm.com> diff --git a/a/1.txt b/N1/1.txt index 9275b78..18a943e 100644 --- a/a/1.txt +++ b/N1/1.txt @@ -1,267 +1,481 @@ -QW55IHVwZGF0ZXMgb24gdGhlIHBhdGNoLgoKLSBOZWVsZXNoCgpPbiAwNS8xOS8yMDE0IDA3OjU2 -IFBNLCBOZWVsZXNoIEd1cHRhIHdyb3RlOgo+IFRoaXMgcGF0Y2ggYWRkcyBiYXNpYyBrZXJuZWwg -ZW5hYmxlbWVudCBmb3IgcmVhZGluZyBwb3dlciB2YWx1ZXMsIGZhbgo+IHNwZWVkIHJwbSBhbmQg -dGVtcGVyYXR1cmUgdmFsdWVzIG9uIHBvd2VybnYgcGxhdGZvcm1zIHdoaWNoIHdpbGwKPiBiZSBl -eHBvcnRlZCB0byB1c2VyIHNwYWNlIHRocm91Z2ggc3lzZnMgaW50ZXJmYWNlLgo+Cj4gVGVzdCBy -ZXN1bHRzOgo+IC0tLS0tLS0tLS0tLS0KPiBbcm9vdEB0dWwxNjNwMSB+XSMgc2Vuc29ycwo+IGli -bXBvd2VybnYtaXNhLTAwMDAKPiBBZGFwdGVyOiBJU0EgYWRhcHRlcgo+IGZhbjE6ICAgICAgICA1 -NDg3IFJQTSAgKG1pbiA9ICAgIDAgUlBNKQo+IGZhbjI6ICAgICAgICA1MTUyIFJQTSAgKG1pbiA9 -ICAgIDAgUlBNKQo+IGZhbjM6ICAgICAgICA1NTkwIFJQTSAgKG1pbiA9ICAgIDAgUlBNKQo+IGZh -bjQ6ICAgICAgICA0OTYzIFJQTSAgKG1pbiA9ICAgIDAgUlBNKQo+IGZhbjU6ICAgICAgICAgICAw 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-aWxpbmcgbGlzdAo+IExpbnV4cHBjLWRldkBsaXN0cy5vemxhYnMub3JnCj4gaHR0cHM6Ly9saXN0 -cy5vemxhYnMub3JnL2xpc3RpbmZvL2xpbnV4cHBjLWRldgoKX19fX19fX19fX19fX19fX19fX19f -X19fX19fX19fX19fX19fX19fX19fX19fX18KbG0tc2Vuc29ycyBtYWlsaW5nIGxpc3QKbG0tc2Vu -c29yc0BsbS1zZW5zb3JzLm9yZwpodHRwOi8vbGlzdHMubG0tc2Vuc29ycy5vcmcvbWFpbG1hbi9s -aXN0aW5mby9sbS1zZW5zb3Jz +Any updates on the patch. + +- Neelesh + +On 05/19/2014 07:56 PM, Neelesh Gupta wrote: +> This patch adds basic kernel enablement for reading power values, fan +> speed rpm and temperature values on powernv platforms which will +> be exported to user space through sysfs interface. +> +> Test results: +> ------------- +> [root@tul163p1 ~]# sensors +> ibmpowernv-isa-0000 +> Adapter: ISA adapter +> fan1: 5487 RPM (min = 0 RPM) +> fan2: 5152 RPM (min = 0 RPM) +> fan3: 5590 RPM (min = 0 RPM) +> fan4: 4963 RPM (min = 0 RPM) +> fan5: 0 RPM (min = 0 RPM) +> fan6: 0 RPM (min = 0 RPM) +> fan7: 7488 RPM (min = 0 RPM) +> fan8: 7944 RPM (min = 0 RPM) +> temp1: +39.0°C (high = +0.0°C) +> power1: 192.00 W +> +> [root@tul163p1 ~]# ls /sys/devices/platform/ +> alarmtimer ibmpowernv.0 rtc-generic serial8250 uevent +> [root@tul163p1 ~]# ls /sys/devices/platform/ibmpowernv.0/ +> driver/ hwmon/ modalias subsystem/ uevent +> [root@tul163p1 ~]# ls /sys/devices/platform/ibmpowernv.0/hwmon/hwmon0/ +> device fan2_min fan4_min fan6_min fan8_min power1_input +> fan1_fault fan3_fault fan5_fault fan7_fault in1_fault subsystem +> fan1_input fan3_input fan5_input fan7_input in2_fault temp1_input +> fan1_min fan3_min fan5_min fan7_min in3_fault temp1_max +> fan2_fault fan4_fault fan6_fault fan8_fault in4_fault uevent +> fan2_input fan4_input fan6_input fan8_input name +> [root@tul163p1 ~]# +> [root@tul163p1 ~]# ls /sys/class/hwmon/hwmon0/ +> device fan2_min fan4_min fan6_min fan8_min power1_input +> fan1_fault fan3_fault fan5_fault fan7_fault in1_fault subsystem +> fan1_input fan3_input fan5_input fan7_input in2_fault temp1_input +> fan1_min fan3_min fan5_min fan7_min in3_fault temp1_max +> fan2_fault fan4_fault fan6_fault fan8_fault in4_fault uevent +> fan2_input fan4_input fan6_input fan8_input name +> [root@tul163p1 ~]# +> +> Signed-off-by: Neelesh Gupta <neelegup@linux.vnet.ibm.com> +> --- +> +> Changes in v2 +> ============= +> - Generic use of devm_* functions in hwmon like using devm_kzalloc() for dynamic +> memory request, avoiding the need to explicit free of memory. +> Adding 'struct attribute_group' as member of platform data structure to be +> populated and then passed to devm_hwmon_device_register_with_groups(). +> +> Note: Having an array of pointers of 'attribute_group' and each group +> corresponds to 'enum sensors' type. Not completely sure, if it's ideal or +> could have just one group populated with attributes of sensor types? +> +> - 'ibmpowernv' is not hot-pluggable device so moving 'platform_driver' callback +> function (probe) as part of __init code. +> - Fixed issues related to coding style. +> - Other general comments in v1. +> +> drivers/hwmon/Kconfig | 8 + +> drivers/hwmon/Makefile | 1 +> drivers/hwmon/ibmpowernv.c | 368 ++++++++++++++++++++++++++++++++++++++++++++ +> 3 files changed, 377 insertions(+) +> create mode 100644 drivers/hwmon/ibmpowernv.c +> +> diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig +> index bc196f4..3e308fa 100644 +> --- a/drivers/hwmon/Kconfig +> +++ b/drivers/hwmon/Kconfig +> @@ -554,6 +554,14 @@ config SENSORS_IBMPEX +> This driver can also be built as a module. If so, the module +> will be called ibmpex. +> +> +config SENSORS_IBMPOWERNV +> + tristate "IBM POWERNV platform sensors" +> + depends on PPC_POWERNV +> + default y +> + help +> + If you say yes here you get support for the temperature/fan/power +> + sensors on your platform. +> + +> config SENSORS_IIO_HWMON +> tristate "Hwmon driver that uses channels specified via iio maps" +> depends on IIO +> diff --git a/drivers/hwmon/Makefile b/drivers/hwmon/Makefile +> index c48f987..199c401 100644 +> --- a/drivers/hwmon/Makefile +> +++ b/drivers/hwmon/Makefile +> @@ -71,6 +71,7 @@ obj-$(CONFIG_SENSORS_ULTRA45) += ultra45_env.o +> obj-$(CONFIG_SENSORS_I5K_AMB) += i5k_amb.o +> obj-$(CONFIG_SENSORS_IBMAEM) += ibmaem.o +> obj-$(CONFIG_SENSORS_IBMPEX) += ibmpex.o +> +obj-$(CONFIG_SENSORS_IBMPOWERNV)+= ibmpowernv.o +> obj-$(CONFIG_SENSORS_IIO_HWMON) += iio_hwmon.o +> obj-$(CONFIG_SENSORS_INA209) += ina209.o +> obj-$(CONFIG_SENSORS_INA2XX) += ina2xx.o +> diff --git a/drivers/hwmon/ibmpowernv.c b/drivers/hwmon/ibmpowernv.c +> new file mode 100644 +> index 0000000..afce620 +> --- /dev/null +> +++ b/drivers/hwmon/ibmpowernv.c +> @@ -0,0 +1,368 @@ +> +/* +> + * IBM PowerNV platform sensors for temperature/fan/power +> + * Copyright (C) 2014 IBM +> + * +> + * This program is free software; you can redistribute it and/or modify +> + * it under the terms of the GNU General Public License as published by +> + * the Free Software Foundation; either version 2 of the License, or +> + * (at your option) any later version. +> + * +> + * This program is distributed in the hope that 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. +> + */ +> + +> +#include <linux/init.h> +> +#include <linux/module.h> +> +#include <linux/kernel.h> +> +#include <linux/hwmon.h> +> +#include <linux/hwmon-sysfs.h> +> +#include <linux/of.h> +> +#include <linux/slab.h> +> + +> +#include <linux/platform_device.h> +> +#include <asm/opal.h> +> +#include <linux/err.h> +> + +> +#define DRVNAME "ibmpowernv" +> +#define MAX_ATTR_LEN 32 +> + +> +/* Sensor suffix name from DT */ +> +#define DT_FAULT_ATTR_SUFFIX "faulted" +> +#define DT_DATA_ATTR_SUFFIX "data" +> +#define DT_THRESHOLD_ATTR_SUFFIX "thrs" +> + +> +/* +> + * Enumerates all the types of sensors in the POWERNV platform and does index +> + * into 'struct sensor_group' +> + */ +> +enum sensors { +> + FAN, +> + AMBIENT_TEMP, +> + POWER_SUPPLY, +> + POWER_INPUT, +> + MAX_SENSOR_TYPE, +> +}; +> + +> +static struct sensor_group { +> + const char *name; +> + const char *compatible; +> + struct attribute_group group; +> + u32 attr_count; +> +} sensor_groups[] = { +> + {"fan", "ibm,opal-sensor-cooling-fan", {0}, 0}, +> + {"temp", "ibm,opal-sensor-amb-temp", {0}, 0}, +> + {"in", "ibm,opal-sensor-power-supply", {0}, 0}, +> + {"power", "ibm,opal-sensor-power", {0}, 0} +> +}; +> + +> +struct sensor_data { +> + u32 id; /* An opaque id of the firmware for each sensor */ +> + enum sensors type; +> + char name[MAX_ATTR_LEN]; +> + struct device_attribute dev_attr; +> +}; +> + +> +struct platform_data { +> + const struct attribute_group *attr_groups[MAX_SENSOR_TYPE + 1]; +> + u32 sensors_count; /* Total count of sensors from each group */ +> +}; +> + +> +/* Platform device representing all the ibmpowernv sensors */ +> +static struct platform_device *pdevice; +> + +> +static ssize_t show_sensor(struct device *dev, struct device_attribute *devattr, +> + char *buf) +> +{ +> + struct sensor_data *sdata = container_of(devattr, struct sensor_data, +> + dev_attr); +> + ssize_t ret; +> + u32 x; +> + +> + ret = opal_get_sensor_data(sdata->id, &x); +> + if (ret) { +> + pr_err("%s: Failed to get opal sensor data\n", __func__); +> + return ret; +> + } +> + +> + /* Convert temperature to milli-degrees */ +> + if (sdata->type == AMBIENT_TEMP) +> + x *= 1000; +> + /* Convert power to micro-watts */ +> + else if (sdata->type == POWER_INPUT) +> + x *= 1000000; +> + +> + return sprintf(buf, "%d\n", x); +> +} +> + +> +static void __init get_sensor_index_attr(const char *name, u32 *index, char *attr) +> +{ +> + char *hash_pos = strchr(name, '#'); +> + char *dash_pos; +> + u32 copy_len; +> + char buf[8]; +> + +> + memset(buf, 0, sizeof(buf)); +> + *index = 0; +> + *attr = '\0'; +> + +> + if (hash_pos) { +> + dash_pos = strchr(hash_pos, '-'); +> + if (dash_pos) { +> + copy_len = dash_pos - hash_pos - 1; +> + if (copy_len < sizeof(buf)) { +> + strncpy(buf, hash_pos + 1, copy_len); +> + sscanf(buf, "%d", index); +> + } +> + +> + strncpy(attr, dash_pos + 1, MAX_ATTR_LEN); +> + } +> + } +> +} +> + +> +/* +> + * This function translates the DT node name into the 'hwmon' attribute name. +> + * IBMPOWERNV device node appear like cooling-fan#2-data, amb-temp#1-thrs etc. +> + * which need to be mapped as fan2_input, temp1_max respectively before +> + * populating them inside hwmon device class.. +> + */ +> +static int __init create_hwmon_attr_name(enum sensors type, const char *node_name, +> + char *hwmon_attr_name) +> +{ +> + char attr_suffix[MAX_ATTR_LEN]; +> + char *attr_name; +> + u32 index; +> + +> + get_sensor_index_attr(node_name, &index, attr_suffix); +> + if (!index || !strlen(attr_suffix)) { +> + pr_info("%s: Sensor device node name is invalid, name: %s\n", +> + __func__, node_name); +> + return -EINVAL; +> + } +> + +> + if (!strcmp(attr_suffix, DT_FAULT_ATTR_SUFFIX)) +> + attr_name = "fault"; +> + else if(!strcmp(attr_suffix, DT_DATA_ATTR_SUFFIX)) +> + attr_name = "input"; +> + else if (!strcmp(attr_suffix, DT_THRESHOLD_ATTR_SUFFIX)) { +> + if (type == AMBIENT_TEMP) +> + attr_name = "max"; +> + else if (type == FAN) +> + attr_name = "min"; +> + else +> + return -ENOENT; +> + } else +> + return -ENOENT; +> + +> + snprintf(hwmon_attr_name, MAX_ATTR_LEN, "%s%d_%s", +> + sensor_groups[type].name, index, attr_name); +> + return 0; +> +} +> + +> +static int __init populate_attr_groups(struct platform_device *pdev) +> +{ +> + struct platform_data *pdata = platform_get_drvdata(pdev); +> + const struct attribute_group **pgroups = pdata->attr_groups; +> + struct device_node *opal, *np; +> + enum sensors type; +> + int err = 0; +> + +> + opal = of_find_node_by_path("/ibm,opal/sensors"); +> + if (!opal) { +> + pr_err("%s: Opal 'sensors' node not found\n", __func__); +> + return -ENODEV; +> + } +> + +> + for_each_child_of_node(opal, np) { +> + if (np->name == NULL) +> + continue; +> + +> + for (type = 0; type < MAX_SENSOR_TYPE; type++) +> + if (of_device_is_compatible(np, +> + sensor_groups[type].compatible)) { +> + sensor_groups[type].attr_count++; +> + break; +> + } +> + } +> + +> + for (type = 0; type < MAX_SENSOR_TYPE; type++) { +> + if (!sensor_groups[type].attr_count) +> + continue; +> + +> + sensor_groups[type].group.attrs = devm_kzalloc(&pdev->dev, +> + sizeof(struct attribute*) * +> + (sensor_groups[type].attr_count + 1), +> + GFP_KERNEL); +> + if (!sensor_groups[type].group.attrs) { +> + pr_err("%s: Failed to allocate memory for attribute" +> + "array\n", __func__); +> + err = -ENOMEM; +> + goto exit_put_node; +> + } +> + +> + pgroups[type] = &sensor_groups[type].group; +> + pdata->sensors_count += sensor_groups[type].attr_count; +> + sensor_groups[type].attr_count = 0; +> + } +> + +> +exit_put_node: +> + of_node_put(opal); +> + return err; +> +} +> + +> +/* +> + * Iterate through the device tree for each child of sensor node, create +> + * a sysfs attribute file, the file is named by translating the DT node name +> + * to the name required by the higher 'hwmon' driver like fan1_input, temp1_max +> + * etc.. +> + */ +> +static int __init create_device_attrs(struct platform_device *pdev) +> +{ +> + struct platform_data *pdata = platform_get_drvdata(pdev); +> + const struct attribute_group **pgroups = pdata->attr_groups; +> + struct device_node *opal, *np; +> + struct sensor_data *sdata; +> + const u32 *sensor_id; +> + enum sensors type; +> + u32 count = 0; +> + int err = 0; +> + +> + opal = of_find_node_by_path("/ibm,opal/sensors"); +> + if (!opal) { +> + pr_err("%s: Opal 'sensors' node not found\n", __func__); +> + return -ENODEV; +> + } +> + +> + sdata = devm_kzalloc(&pdev->dev, (pdata->sensors_count) * +> + sizeof(*sdata), GFP_KERNEL); +> + if (!sdata) { +> + pr_err("%s: Failed to allocate memory for the sensor_data", +> + __func__); +> + err = -ENOMEM; +> + goto exit_put_node; +> + } +> + +> + for_each_child_of_node(opal, np) { +> + if (np->name == NULL) +> + continue; +> + +> + for (type = 0; type < MAX_SENSOR_TYPE; type++) +> + if (of_device_is_compatible(np, +> + sensor_groups[type].compatible)) +> + break; +> + +> + if (type == MAX_SENSOR_TYPE) +> + continue; +> + +> + sensor_id = of_get_property(np, "sensor-id", NULL); +> + if (!sensor_id) { +> + pr_info("%s: %s doesn't have sensor-id\n", __func__, +> + np->name); +> + continue; +> + } +> + +> + sdata[count].id = *sensor_id; +> + sdata[count].type = type; +> + err = create_hwmon_attr_name(type, np->name, sdata[count].name); +> + if (err) +> + goto exit_put_node; +> + +> + sysfs_attr_init(&sdata[count].dev_attr.attr); +> + sdata[count].dev_attr.attr.name = sdata[count].name; +> + sdata[count].dev_attr.attr.mode = S_IRUGO; +> + sdata[count].dev_attr.show = show_sensor; +> + +> + pgroups[type]->attrs[sensor_groups[type].attr_count++] = +> + &sdata[count++].dev_attr.attr; +> + } +> + +> +exit_put_node: +> + of_node_put(opal); +> + return err; +> +} +> + +> +static int __init ibmpowernv_probe(struct platform_device *pdev) +> +{ +> + struct platform_data *pdata; +> + struct device *hwmon_dev; +> + int err; +> + +> + pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL); +> + if (!pdata) +> + return -ENOMEM; +> + +> + platform_set_drvdata(pdev, pdata); +> + pdata->sensors_count = 0; +> + err = populate_attr_groups(pdev); +> + if (err) +> + return err; +> + +> + /* Create sysfs attribute file for each sensor found in the DT */ +> + err = create_device_attrs(pdev); +> + if (err) +> + return err; +> + +> + /* Finally, register with hwmon */ +> + hwmon_dev = devm_hwmon_device_register_with_groups(&pdev->dev, DRVNAME, +> + pdata, +> + pdata->attr_groups); +> + +> + return PTR_ERR_OR_ZERO(hwmon_dev); +> +} +> + +> +static struct platform_driver ibmpowernv_driver = { +> + .driver = { +> + .owner = THIS_MODULE, +> + .name = DRVNAME, +> + }, +> +}; +> + +> +static int __init ibmpowernv_init(void) +> +{ +> + int err; +> + +> + pdevice = platform_device_alloc(DRVNAME, 0); +> + if (!pdevice) { +> + pr_err("%s: Device allocation failed\n", __func__); +> + err = -ENOMEM; +> + goto exit; +> + } +> + +> + err = platform_device_add(pdevice); +> + if (err) { +> + pr_err("%s: Device addition failed (%d)\n", __func__, err); +> + goto exit_device_put; +> + } +> + +> + err = platform_driver_probe(&ibmpowernv_driver, ibmpowernv_probe); +> + if (err) { +> + pr_err("%s: Platfrom driver probe failed\n", __func__); +> + goto exit_device_del; +> + } +> + +> + return 0; +> + +> +exit_device_del: +> + platform_device_del(pdevice); +> +exit_device_put: +> + platform_device_put(pdevice); +> +exit: +> + return err; +> +} +> + +> +static void __exit ibmpowernv_exit(void) +> +{ +> + platform_driver_unregister(&ibmpowernv_driver); +> + platform_device_unregister(pdevice); +> +} +> + +> +MODULE_AUTHOR("Neelesh Gupta <neelegup@linux.vnet.ibm.com>"); +> +MODULE_DESCRIPTION("IBM POWERNV platform sensors"); +> +MODULE_LICENSE("GPL"); +> + +> +module_init(ibmpowernv_init); +> +module_exit(ibmpowernv_exit); +> +> _______________________________________________ +> Linuxppc-dev mailing list +> Linuxppc-dev@lists.ozlabs.org +> https://lists.ozlabs.org/listinfo/linuxppc-dev diff --git a/N1/2.bin b/N1/2.bin new file mode 100644 index 0000000..c0d2d18 --- /dev/null +++ b/N1/2.bin @@ -0,0 +1,495 @@ +<html> + <head> + <meta content="text/html; charset=UTF-8" http-equiv="Content-Type"> + </head> + <body bgcolor="#FFFFFF" text="#000000"> + <small>Any updates on the patch.<br> + <br> + - Neelesh</small><br> + <br> + <div class="moz-cite-prefix">On 05/19/2014 07:56 PM, Neelesh Gupta + wrote:<br> + </div> + <blockquote + cite="mid:20140519141931.9248.11356.stgit@neelegup-tp-t420.in.ibm.com" + type="cite"> + <pre wrap="">This patch adds basic kernel enablement for reading power values, fan +speed rpm and temperature values on powernv platforms which will +be exported to user space through sysfs interface. + +Test results: +------------- +[root@tul163p1 ~]# sensors +ibmpowernv-isa-0000 +Adapter: ISA adapter +fan1: 5487 RPM (min = 0 RPM) +fan2: 5152 RPM (min = 0 RPM) +fan3: 5590 RPM (min = 0 RPM) +fan4: 4963 RPM (min = 0 RPM) +fan5: 0 RPM (min = 0 RPM) +fan6: 0 RPM (min = 0 RPM) +fan7: 7488 RPM (min = 0 RPM) +fan8: 7944 RPM (min = 0 RPM) +temp1: +39.0°C (high = +0.0°C) +power1: 192.00 W + +[root@tul163p1 ~]# ls /sys/devices/platform/ +alarmtimer ibmpowernv.0 rtc-generic serial8250 uevent +[root@tul163p1 ~]# ls /sys/devices/platform/ibmpowernv.0/ +driver/ hwmon/ modalias subsystem/ uevent +[root@tul163p1 ~]# ls /sys/devices/platform/ibmpowernv.0/hwmon/hwmon0/ +device fan2_min fan4_min fan6_min fan8_min power1_input +fan1_fault fan3_fault fan5_fault fan7_fault in1_fault subsystem +fan1_input fan3_input fan5_input fan7_input in2_fault temp1_input +fan1_min fan3_min fan5_min fan7_min in3_fault temp1_max +fan2_fault fan4_fault fan6_fault fan8_fault in4_fault uevent +fan2_input fan4_input fan6_input fan8_input name +[root@tul163p1 ~]# +[root@tul163p1 ~]# ls /sys/class/hwmon/hwmon0/ +device fan2_min fan4_min fan6_min fan8_min power1_input +fan1_fault fan3_fault fan5_fault fan7_fault in1_fault subsystem +fan1_input fan3_input fan5_input fan7_input in2_fault temp1_input +fan1_min fan3_min fan5_min fan7_min in3_fault temp1_max +fan2_fault fan4_fault fan6_fault fan8_fault in4_fault uevent +fan2_input fan4_input fan6_input fan8_input name +[root@tul163p1 ~]# + +Signed-off-by: Neelesh Gupta <a class="moz-txt-link-rfc2396E" href="mailto:neelegup@linux.vnet.ibm.com"><neelegup@linux.vnet.ibm.com></a> +--- + +Changes in v2 +============= +- Generic use of devm_* functions in hwmon like using devm_kzalloc() for dynamic + memory request, avoiding the need to explicit free of memory. + Adding 'struct attribute_group' as member of platform data structure to be + populated and then passed to devm_hwmon_device_register_with_groups(). + + Note: Having an array of pointers of 'attribute_group' and each group + corresponds to 'enum sensors' type. Not completely sure, if it's ideal or + could have just one group populated with attributes of sensor types? + +- 'ibmpowernv' is not hot-pluggable device so moving 'platform_driver' callback + function (probe) as part of __init code. +- Fixed issues related to coding style. +- Other general comments in v1. + + drivers/hwmon/Kconfig | 8 + + drivers/hwmon/Makefile | 1 + drivers/hwmon/ibmpowernv.c | 368 ++++++++++++++++++++++++++++++++++++++++++++ + 3 files changed, 377 insertions(+) + create mode 100644 drivers/hwmon/ibmpowernv.c + +diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig +index bc196f4..3e308fa 100644 +--- a/drivers/hwmon/Kconfig ++++ b/drivers/hwmon/Kconfig +@@ -554,6 +554,14 @@ config SENSORS_IBMPEX + This driver can also be built as a module. If so, the module + will be called ibmpex. + ++config SENSORS_IBMPOWERNV ++ tristate "IBM POWERNV platform sensors" ++ depends on PPC_POWERNV ++ default y ++ help ++ If you say yes here you get support for the temperature/fan/power ++ sensors on your platform. ++ + config SENSORS_IIO_HWMON + tristate "Hwmon driver that uses channels specified via iio maps" + depends on IIO +diff --git a/drivers/hwmon/Makefile b/drivers/hwmon/Makefile +index c48f987..199c401 100644 +--- a/drivers/hwmon/Makefile ++++ b/drivers/hwmon/Makefile +@@ -71,6 +71,7 @@ obj-$(CONFIG_SENSORS_ULTRA45) += ultra45_env.o + obj-$(CONFIG_SENSORS_I5K_AMB) += i5k_amb.o + obj-$(CONFIG_SENSORS_IBMAEM) += ibmaem.o + obj-$(CONFIG_SENSORS_IBMPEX) += ibmpex.o ++obj-$(CONFIG_SENSORS_IBMPOWERNV)+= ibmpowernv.o + obj-$(CONFIG_SENSORS_IIO_HWMON) += iio_hwmon.o + obj-$(CONFIG_SENSORS_INA209) += ina209.o + obj-$(CONFIG_SENSORS_INA2XX) += ina2xx.o +diff --git a/drivers/hwmon/ibmpowernv.c b/drivers/hwmon/ibmpowernv.c +new file mode 100644 +index 0000000..afce620 +--- /dev/null ++++ b/drivers/hwmon/ibmpowernv.c +@@ -0,0 +1,368 @@ ++/* ++ * IBM PowerNV platform sensors for temperature/fan/power ++ * Copyright (C) 2014 IBM ++ * ++ * This program is free software; you can redistribute it and/or modify ++ * it under the terms of the GNU General Public License as published by ++ * the Free Software Foundation; either version 2 of the License, or ++ * (at your option) any later version. ++ * ++ * This program is distributed in the hope that 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. ++ */ ++ ++#include <linux/init.h> ++#include <linux/module.h> ++#include <linux/kernel.h> ++#include <linux/hwmon.h> ++#include <linux/hwmon-sysfs.h> ++#include <linux/of.h> ++#include <linux/slab.h> ++ ++#include <linux/platform_device.h> ++#include <asm/opal.h> ++#include <linux/err.h> ++ ++#define DRVNAME "ibmpowernv" ++#define MAX_ATTR_LEN 32 ++ ++/* Sensor suffix name from DT */ ++#define DT_FAULT_ATTR_SUFFIX "faulted" ++#define DT_DATA_ATTR_SUFFIX "data" ++#define DT_THRESHOLD_ATTR_SUFFIX "thrs" ++ ++/* ++ * Enumerates all the types of sensors in the POWERNV platform and does index ++ * into 'struct sensor_group' ++ */ ++enum sensors { ++ FAN, ++ AMBIENT_TEMP, ++ POWER_SUPPLY, ++ POWER_INPUT, ++ MAX_SENSOR_TYPE, ++}; ++ ++static struct sensor_group { ++ const char *name; ++ const char *compatible; ++ struct attribute_group group; ++ u32 attr_count; ++} sensor_groups[] = { ++ {"fan", "ibm,opal-sensor-cooling-fan", {0}, 0}, ++ {"temp", "ibm,opal-sensor-amb-temp", {0}, 0}, ++ {"in", "ibm,opal-sensor-power-supply", {0}, 0}, ++ {"power", "ibm,opal-sensor-power", {0}, 0} ++}; ++ ++struct sensor_data { ++ u32 id; /* An opaque id of the firmware for each sensor */ ++ enum sensors type; ++ char name[MAX_ATTR_LEN]; ++ struct device_attribute dev_attr; ++}; ++ ++struct platform_data { ++ const struct attribute_group *attr_groups[MAX_SENSOR_TYPE + 1]; ++ u32 sensors_count; /* Total count of sensors from each group */ ++}; ++ ++/* Platform device representing all the ibmpowernv sensors */ ++static struct platform_device *pdevice; ++ ++static ssize_t show_sensor(struct device *dev, struct device_attribute *devattr, ++ char *buf) ++{ ++ struct sensor_data *sdata = container_of(devattr, struct sensor_data, ++ dev_attr); ++ ssize_t ret; ++ u32 x; ++ ++ ret = opal_get_sensor_data(sdata->id, &x); ++ if (ret) { ++ pr_err("%s: Failed to get opal sensor data\n", __func__); ++ return ret; ++ } ++ ++ /* Convert temperature to milli-degrees */ ++ if (sdata->type == AMBIENT_TEMP) ++ x *= 1000; ++ /* Convert power to micro-watts */ ++ else if (sdata->type == POWER_INPUT) ++ x *= 1000000; ++ ++ return sprintf(buf, "%d\n", x); ++} ++ ++static void __init get_sensor_index_attr(const char *name, u32 *index, char *attr) ++{ ++ char *hash_pos = strchr(name, '#'); ++ char *dash_pos; ++ u32 copy_len; ++ char buf[8]; ++ ++ memset(buf, 0, sizeof(buf)); ++ *index = 0; ++ *attr = '\0'; ++ ++ if (hash_pos) { ++ dash_pos = strchr(hash_pos, '-'); ++ if (dash_pos) { ++ copy_len = dash_pos - hash_pos - 1; ++ if (copy_len < sizeof(buf)) { ++ strncpy(buf, hash_pos + 1, copy_len); ++ sscanf(buf, "%d", index); ++ } ++ ++ strncpy(attr, dash_pos + 1, MAX_ATTR_LEN); ++ } ++ } ++} ++ ++/* ++ * This function translates the DT node name into the 'hwmon' attribute name. ++ * IBMPOWERNV device node appear like cooling-fan#2-data, amb-temp#1-thrs etc. ++ * which need to be mapped as fan2_input, temp1_max respectively before ++ * populating them inside hwmon device class.. ++ */ ++static int __init create_hwmon_attr_name(enum sensors type, const char *node_name, ++ char *hwmon_attr_name) ++{ ++ char attr_suffix[MAX_ATTR_LEN]; ++ char *attr_name; ++ u32 index; ++ ++ get_sensor_index_attr(node_name, &index, attr_suffix); ++ if (!index || !strlen(attr_suffix)) { ++ pr_info("%s: Sensor device node name is invalid, name: %s\n", ++ __func__, node_name); ++ return -EINVAL; ++ } ++ ++ if (!strcmp(attr_suffix, DT_FAULT_ATTR_SUFFIX)) ++ attr_name = "fault"; ++ else if(!strcmp(attr_suffix, DT_DATA_ATTR_SUFFIX)) ++ attr_name = "input"; ++ else if (!strcmp(attr_suffix, DT_THRESHOLD_ATTR_SUFFIX)) { ++ if (type == AMBIENT_TEMP) ++ attr_name = "max"; ++ else if (type == FAN) ++ attr_name = "min"; ++ else ++ return -ENOENT; ++ } else ++ return -ENOENT; ++ ++ snprintf(hwmon_attr_name, MAX_ATTR_LEN, "%s%d_%s", ++ sensor_groups[type].name, index, attr_name); ++ return 0; ++} ++ ++static int __init populate_attr_groups(struct platform_device *pdev) ++{ ++ struct platform_data *pdata = platform_get_drvdata(pdev); ++ const struct attribute_group **pgroups = pdata->attr_groups; ++ struct device_node *opal, *np; ++ enum sensors type; ++ int err = 0; ++ ++ opal = of_find_node_by_path("/ibm,opal/sensors"); ++ if (!opal) { ++ pr_err("%s: Opal 'sensors' node not found\n", __func__); ++ return -ENODEV; ++ } ++ ++ for_each_child_of_node(opal, np) { ++ if (np->name == NULL) ++ continue; ++ ++ for (type = 0; type < MAX_SENSOR_TYPE; type++) ++ if (of_device_is_compatible(np, ++ sensor_groups[type].compatible)) { ++ sensor_groups[type].attr_count++; ++ break; ++ } ++ } ++ ++ for (type = 0; type < MAX_SENSOR_TYPE; type++) { ++ if (!sensor_groups[type].attr_count) ++ continue; ++ ++ sensor_groups[type].group.attrs = devm_kzalloc(&pdev->dev, ++ sizeof(struct attribute*) * ++ (sensor_groups[type].attr_count + 1), ++ GFP_KERNEL); ++ if (!sensor_groups[type].group.attrs) { ++ pr_err("%s: Failed to allocate memory for attribute" ++ "array\n", __func__); ++ err = -ENOMEM; ++ goto exit_put_node; ++ } ++ ++ pgroups[type] = &sensor_groups[type].group; ++ pdata->sensors_count += sensor_groups[type].attr_count; ++ sensor_groups[type].attr_count = 0; ++ } ++ ++exit_put_node: ++ of_node_put(opal); ++ return err; ++} ++ ++/* ++ * Iterate through the device tree for each child of sensor node, create ++ * a sysfs attribute file, the file is named by translating the DT node name ++ * to the name required by the higher 'hwmon' driver like fan1_input, temp1_max ++ * etc.. ++ */ ++static int __init create_device_attrs(struct platform_device *pdev) ++{ ++ struct platform_data *pdata = platform_get_drvdata(pdev); ++ const struct attribute_group **pgroups = pdata->attr_groups; ++ struct device_node *opal, *np; ++ struct sensor_data *sdata; ++ const u32 *sensor_id; ++ enum sensors type; ++ u32 count = 0; ++ int err = 0; ++ ++ opal = of_find_node_by_path("/ibm,opal/sensors"); ++ if (!opal) { ++ pr_err("%s: Opal 'sensors' node not found\n", __func__); ++ return -ENODEV; ++ } ++ ++ sdata = devm_kzalloc(&pdev->dev, (pdata->sensors_count) * ++ sizeof(*sdata), GFP_KERNEL); ++ if (!sdata) { ++ pr_err("%s: Failed to allocate memory for the sensor_data", ++ __func__); ++ err = -ENOMEM; ++ goto exit_put_node; ++ } ++ ++ for_each_child_of_node(opal, np) { ++ if (np->name == NULL) ++ continue; ++ ++ for (type = 0; type < MAX_SENSOR_TYPE; type++) ++ if (of_device_is_compatible(np, ++ sensor_groups[type].compatible)) ++ break; ++ ++ if (type == MAX_SENSOR_TYPE) ++ continue; ++ ++ sensor_id = of_get_property(np, "sensor-id", NULL); ++ if (!sensor_id) { ++ pr_info("%s: %s doesn't have sensor-id\n", __func__, ++ np->name); ++ continue; ++ } ++ ++ sdata[count].id = *sensor_id; ++ sdata[count].type = type; ++ err = create_hwmon_attr_name(type, np->name, sdata[count].name); ++ if (err) ++ goto exit_put_node; ++ ++ sysfs_attr_init(&sdata[count].dev_attr.attr); ++ sdata[count].dev_attr.attr.name = sdata[count].name; ++ sdata[count].dev_attr.attr.mode = S_IRUGO; ++ sdata[count].dev_attr.show = show_sensor; ++ ++ pgroups[type]->attrs[sensor_groups[type].attr_count++] = ++ &sdata[count++].dev_attr.attr; ++ } ++ ++exit_put_node: ++ of_node_put(opal); ++ return err; ++} ++ ++static int __init ibmpowernv_probe(struct platform_device *pdev) ++{ ++ struct platform_data *pdata; ++ struct device *hwmon_dev; ++ int err; ++ ++ pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL); ++ if (!pdata) ++ return -ENOMEM; ++ ++ platform_set_drvdata(pdev, pdata); ++ pdata->sensors_count = 0; ++ err = populate_attr_groups(pdev); ++ if (err) ++ return err; ++ ++ /* Create sysfs attribute file for each sensor found in the DT */ ++ err = create_device_attrs(pdev); ++ if (err) ++ return err; ++ ++ /* Finally, register with hwmon */ ++ hwmon_dev = devm_hwmon_device_register_with_groups(&pdev->dev, DRVNAME, ++ pdata, ++ pdata->attr_groups); ++ ++ return PTR_ERR_OR_ZERO(hwmon_dev); ++} ++ ++static struct platform_driver ibmpowernv_driver = { ++ .driver = { ++ .owner = THIS_MODULE, ++ .name = DRVNAME, ++ }, ++}; ++ ++static int __init ibmpowernv_init(void) ++{ ++ int err; ++ ++ pdevice = platform_device_alloc(DRVNAME, 0); ++ if (!pdevice) { ++ pr_err("%s: Device allocation failed\n", __func__); ++ err = -ENOMEM; ++ goto exit; ++ } ++ ++ err = platform_device_add(pdevice); ++ if (err) { ++ pr_err("%s: Device addition failed (%d)\n", __func__, err); ++ goto exit_device_put; ++ } ++ ++ err = platform_driver_probe(&ibmpowernv_driver, ibmpowernv_probe); ++ if (err) { ++ pr_err("%s: Platfrom driver probe failed\n", __func__); ++ goto exit_device_del; ++ } ++ ++ return 0; ++ ++exit_device_del: ++ platform_device_del(pdevice); ++exit_device_put: ++ platform_device_put(pdevice); ++exit: ++ return err; ++} ++ ++static void __exit ibmpowernv_exit(void) ++{ ++ platform_driver_unregister(&ibmpowernv_driver); ++ platform_device_unregister(pdevice); ++} ++ ++MODULE_AUTHOR("Neelesh Gupta <a class="moz-txt-link-rfc2396E" href="mailto:neelegup@linux.vnet.ibm.com"><neelegup@linux.vnet.ibm.com></a>"); ++MODULE_DESCRIPTION("IBM POWERNV platform sensors"); ++MODULE_LICENSE("GPL"); ++ ++module_init(ibmpowernv_init); ++module_exit(ibmpowernv_exit); + +_______________________________________________ +Linuxppc-dev mailing list +<a class="moz-txt-link-abbreviated" href="mailto:Linuxppc-dev@lists.ozlabs.org">Linuxppc-dev@lists.ozlabs.org</a> +<a class="moz-txt-link-freetext" href="https://lists.ozlabs.org/listinfo/linuxppc-dev">https://lists.ozlabs.org/listinfo/linuxppc-dev</a></pre> + </blockquote> + <br> + </body> +</html> diff --git a/N1/2.hdr b/N1/2.hdr new file mode 100644 index 0000000..e9e8314 --- /dev/null +++ b/N1/2.hdr @@ -0,0 +1,2 @@ +Content-Type: text/html; charset=UTF-8 +Content-Transfer-Encoding: 8bit diff --git a/a/content_digest 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+ "On 05/19/2014 07:56 PM, Neelesh Gupta wrote:\n" + "> This patch adds basic kernel enablement for reading power values, fan\n" + "> speed rpm and temperature values on powernv platforms which will\n" + "> be exported to user space through sysfs interface.\n" + ">\n" + "> Test results:\n" + "> -------------\n" + "> [root@tul163p1 ~]# sensors\n" + "> ibmpowernv-isa-0000\n" + "> Adapter: ISA adapter\n" + "> fan1: 5487 RPM (min = 0 RPM)\n" + "> fan2: 5152 RPM (min = 0 RPM)\n" + "> fan3: 5590 RPM (min = 0 RPM)\n" + "> fan4: 4963 RPM (min = 0 RPM)\n" + "> fan5: 0 RPM (min = 0 RPM)\n" + "> fan6: 0 RPM (min = 0 RPM)\n" + "> fan7: 7488 RPM (min = 0 RPM)\n" + "> fan8: 7944 RPM (min = 0 RPM)\n" + "> temp1: +39.0\302\260C (high = +0.0\302\260C)\n" + "> power1: 192.00 W\n" + ">\n" + "> [root@tul163p1 ~]# ls /sys/devices/platform/\n" + "> alarmtimer ibmpowernv.0 rtc-generic serial8250 uevent\n" + "> [root@tul163p1 ~]# ls /sys/devices/platform/ibmpowernv.0/\n" + "> driver/ hwmon/ modalias subsystem/ uevent\n" + "> [root@tul163p1 ~]# ls /sys/devices/platform/ibmpowernv.0/hwmon/hwmon0/\n" + "> device\t fan2_min\tfan4_min fan6_min\tfan8_min power1_input\n" + "> fan1_fault fan3_fault\tfan5_fault fan7_fault\tin1_fault subsystem\n" + "> fan1_input fan3_input\tfan5_input fan7_input\tin2_fault temp1_input\n" + "> fan1_min fan3_min\tfan5_min fan7_min\tin3_fault temp1_max\n" + "> fan2_fault fan4_fault\tfan6_fault fan8_fault\tin4_fault uevent\n" + "> fan2_input fan4_input\tfan6_input fan8_input\tname\n" + "> [root@tul163p1 ~]#\n" + "> [root@tul163p1 ~]# ls /sys/class/hwmon/hwmon0/\n" + "> device\t fan2_min\tfan4_min fan6_min\tfan8_min power1_input\n" + "> fan1_fault fan3_fault\tfan5_fault fan7_fault\tin1_fault subsystem\n" + "> fan1_input fan3_input\tfan5_input fan7_input\tin2_fault temp1_input\n" + "> fan1_min fan3_min\tfan5_min fan7_min\tin3_fault temp1_max\n" + "> fan2_fault fan4_fault\tfan6_fault fan8_fault\tin4_fault uevent\n" + "> fan2_input fan4_input\tfan6_input fan8_input\tname\n" + "> [root@tul163p1 ~]#\n" + ">\n" + "> Signed-off-by: Neelesh Gupta <neelegup@linux.vnet.ibm.com>\n" + "> ---\n" + ">\n" + "> Changes in v2\n" + "> =============\n" + "> - Generic use of devm_* functions in hwmon like using devm_kzalloc() for dynamic\n" + "> memory request, avoiding the need to explicit free of memory.\n" + "> Adding 'struct attribute_group' as member of platform data structure to be\n" + "> populated and then passed to devm_hwmon_device_register_with_groups().\n" + ">\n" + "> Note: Having an array of pointers of 'attribute_group' and each group\n" + "> corresponds to 'enum sensors' type. Not completely sure, if it's ideal or\n" + "> could have just one group populated with attributes of sensor types?\n" + ">\n" + "> - 'ibmpowernv' is not hot-pluggable device so moving 'platform_driver' callback\n" + "> function (probe) as part of __init code.\n" + "> - Fixed issues related to coding style.\n" + "> - Other general comments in v1.\n" + ">\n" + "> drivers/hwmon/Kconfig | 8 +\n" + "> drivers/hwmon/Makefile | 1\n" + "> drivers/hwmon/ibmpowernv.c | 368 ++++++++++++++++++++++++++++++++++++++++++++\n" + "> 3 files changed, 377 insertions(+)\n" + "> create mode 100644 drivers/hwmon/ibmpowernv.c\n" + ">\n" + "> diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig\n" + "> index bc196f4..3e308fa 100644\n" + "> --- a/drivers/hwmon/Kconfig\n" + "> +++ b/drivers/hwmon/Kconfig\n" + "> @@ -554,6 +554,14 @@ config SENSORS_IBMPEX\n" + "> \t This driver can also be built as a module. If so, the module\n" + "> \t will be called ibmpex.\n" + "> \n" + "> +config SENSORS_IBMPOWERNV\n" + "> +\ttristate \"IBM POWERNV platform sensors\"\n" + "> +\tdepends on PPC_POWERNV\n" + "> +\tdefault y\n" + "> +\thelp\n" + "> +\t If you say yes here you get support for the temperature/fan/power\n" + "> +\t sensors on your platform.\n" + "> +\n" + "> config SENSORS_IIO_HWMON\n" + "> \ttristate \"Hwmon driver that uses channels specified via iio maps\"\n" + "> \tdepends on IIO\n" + "> diff --git a/drivers/hwmon/Makefile b/drivers/hwmon/Makefile\n" + "> index c48f987..199c401 100644\n" + "> --- a/drivers/hwmon/Makefile\n" + "> +++ b/drivers/hwmon/Makefile\n" + "> @@ -71,6 +71,7 @@ obj-$(CONFIG_SENSORS_ULTRA45)\t+= ultra45_env.o\n" + "> obj-$(CONFIG_SENSORS_I5K_AMB)\t+= i5k_amb.o\n" + "> obj-$(CONFIG_SENSORS_IBMAEM)\t+= ibmaem.o\n" + "> obj-$(CONFIG_SENSORS_IBMPEX)\t+= ibmpex.o\n" + "> +obj-$(CONFIG_SENSORS_IBMPOWERNV)+= ibmpowernv.o\n" + "> obj-$(CONFIG_SENSORS_IIO_HWMON) += iio_hwmon.o\n" + "> obj-$(CONFIG_SENSORS_INA209)\t+= ina209.o\n" + "> obj-$(CONFIG_SENSORS_INA2XX)\t+= ina2xx.o\n" + "> diff --git a/drivers/hwmon/ibmpowernv.c b/drivers/hwmon/ibmpowernv.c\n" + "> new file mode 100644\n" + "> index 0000000..afce620\n" + "> --- /dev/null\n" + "> +++ b/drivers/hwmon/ibmpowernv.c\n" + "> @@ -0,0 +1,368 @@\n" + "> +/*\n" + "> + * IBM PowerNV platform sensors for temperature/fan/power\n" + "> + * Copyright (C) 2014 IBM\n" + "> + *\n" + "> + * This program is free software; you can redistribute it and/or modify\n" + "> + * it under the terms of the GNU General Public License as published by\n" + "> + * the Free Software Foundation; either version 2 of the License, or\n" + "> + * (at your option) any later version.\n" + "> + *\n" + "> + * This program is distributed in the hope that it will be useful,\n" + "> + * but WITHOUT ANY WARRANTY; without even the implied warranty of\n" + "> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n" + "> + * GNU General Public License for more details.\n" + "> + *\n" + "> + * You should have received a copy of the GNU General Public License\n" + "> + * along with this program.\n" + "> + */\n" + "> +\n" + "> +#include <linux/init.h>\n" + "> +#include <linux/module.h>\n" + "> +#include <linux/kernel.h>\n" + "> +#include <linux/hwmon.h>\n" + "> +#include <linux/hwmon-sysfs.h>\n" + "> +#include <linux/of.h>\n" + "> +#include <linux/slab.h>\n" + "> +\n" + "> +#include <linux/platform_device.h>\n" + "> +#include <asm/opal.h>\n" + "> +#include <linux/err.h>\n" + "> +\n" + "> +#define DRVNAME\t\t\"ibmpowernv\"\n" + "> +#define MAX_ATTR_LEN\t32\n" + "> +\n" + "> +/* Sensor suffix name from DT */\n" + "> +#define DT_FAULT_ATTR_SUFFIX\t\t\"faulted\"\n" + "> +#define DT_DATA_ATTR_SUFFIX\t\t\"data\"\n" + "> +#define DT_THRESHOLD_ATTR_SUFFIX\t\"thrs\"\n" + "> +\n" + "> +/*\n" + "> + * Enumerates all the types of sensors in the POWERNV platform and does index\n" + "> + * into 'struct sensor_group'\n" + "> + */\n" + "> +enum sensors {\n" + "> +\tFAN,\n" + "> +\tAMBIENT_TEMP,\n" + "> +\tPOWER_SUPPLY,\n" + "> +\tPOWER_INPUT,\n" + "> +\tMAX_SENSOR_TYPE,\n" + "> +};\n" + "> +\n" + "> +static struct sensor_group {\n" + "> +\tconst char *name;\n" + "> +\tconst char *compatible;\n" + "> +\tstruct attribute_group group;\n" + "> +\tu32 attr_count;\n" + "> +} sensor_groups[] = {\n" + "> +\t{\"fan\", \"ibm,opal-sensor-cooling-fan\", {0}, 0},\n" + "> +\t{\"temp\", \"ibm,opal-sensor-amb-temp\", {0}, 0},\n" + "> +\t{\"in\", \"ibm,opal-sensor-power-supply\", {0}, 0},\n" + "> +\t{\"power\", \"ibm,opal-sensor-power\", {0}, 0}\n" + "> +};\n" + "> +\n" + "> +struct sensor_data {\n" + "> +\tu32 id; /* An opaque id of the firmware for each sensor */\n" + "> +\tenum sensors type;\n" + "> +\tchar name[MAX_ATTR_LEN];\n" + "> +\tstruct device_attribute dev_attr;\n" + "> +};\n" + "> +\n" + "> +struct platform_data {\n" + "> +\tconst struct attribute_group *attr_groups[MAX_SENSOR_TYPE + 1];\n" + "> +\tu32 sensors_count; /* Total count of sensors from each group */\n" + "> +};\n" + "> +\n" + "> +/* Platform device representing all the ibmpowernv sensors */\n" + "> +static struct platform_device *pdevice;\n" + "> +\n" + "> +static ssize_t show_sensor(struct device *dev, struct device_attribute *devattr,\n" + "> +\t\t\t char *buf)\n" + "> +{\n" + "> +\tstruct sensor_data *sdata = container_of(devattr, struct sensor_data,\n" + "> +\t\t\t\t\t\t dev_attr);\n" + "> +\tssize_t ret;\n" + "> +\tu32 x;\n" + "> +\n" + "> +\tret = opal_get_sensor_data(sdata->id, &x);\n" + "> +\tif (ret) {\n" + "> +\t\tpr_err(\"%s: Failed to get opal sensor data\\n\", __func__);\n" + "> +\t\treturn ret;\n" + "> +\t}\n" + "> +\n" + "> +\t/* Convert temperature to milli-degrees */\n" + "> +\tif (sdata->type == AMBIENT_TEMP)\n" + "> +\t\tx *= 1000;\n" + "> +\t/* Convert power to micro-watts */\n" + "> +\telse if (sdata->type == POWER_INPUT)\n" + "> +\t\tx *= 1000000;\n" + "> +\n" + "> +\treturn sprintf(buf, \"%d\\n\", x);\n" + "> +}\n" + "> +\n" + "> +static void __init get_sensor_index_attr(const char *name, u32 *index, char *attr)\n" + "> +{\n" + "> +\tchar *hash_pos = strchr(name, '#');\n" + "> +\tchar *dash_pos;\n" + "> +\tu32 copy_len;\n" + "> +\tchar buf[8];\n" + "> +\n" + "> +\tmemset(buf, 0, sizeof(buf));\n" + "> +\t*index = 0;\n" + "> +\t*attr = '\\0';\n" + "> +\n" + "> +\tif (hash_pos) {\n" + "> +\t\tdash_pos = strchr(hash_pos, '-');\n" + "> +\t\tif (dash_pos) {\n" + "> +\t\t\tcopy_len = dash_pos - hash_pos - 1;\n" + "> +\t\t\tif (copy_len < sizeof(buf)) {\n" + "> +\t\t\t\tstrncpy(buf, hash_pos + 1, copy_len);\n" + "> +\t\t\t\tsscanf(buf, \"%d\", index);\n" + "> +\t\t\t}\n" + "> +\n" + "> +\t\t\tstrncpy(attr, dash_pos + 1, MAX_ATTR_LEN);\n" + "> +\t\t}\n" + "> +\t}\n" + "> +}\n" + "> +\n" + "> +/*\n" + "> + * This function translates the DT node name into the 'hwmon' attribute name.\n" + "> + * IBMPOWERNV device node appear like cooling-fan#2-data, amb-temp#1-thrs etc.\n" + "> + * which need to be mapped as fan2_input, temp1_max respectively before\n" + "> + * populating them inside hwmon device class..\n" + "> + */\n" + "> +static int __init create_hwmon_attr_name(enum sensors type, const char *node_name,\n" + "> +\t\t\t\t char *hwmon_attr_name)\n" + "> +{\n" + "> +\tchar attr_suffix[MAX_ATTR_LEN];\n" + "> +\tchar *attr_name;\n" + "> +\tu32 index;\n" + "> +\n" + "> +\tget_sensor_index_attr(node_name, &index, attr_suffix);\n" + "> +\tif (!index || !strlen(attr_suffix)) {\n" + "> +\t\tpr_info(\"%s: Sensor device node name is invalid, name: %s\\n\",\n" + "> +\t\t\t\t__func__, node_name);\n" + "> +\t\treturn -EINVAL;\n" + "> +\t}\n" + "> +\n" + "> +\tif (!strcmp(attr_suffix, DT_FAULT_ATTR_SUFFIX))\n" + "> +\t\tattr_name = \"fault\";\n" + "> +\telse if(!strcmp(attr_suffix, DT_DATA_ATTR_SUFFIX))\n" + "> +\t\tattr_name = \"input\";\n" + "> +\telse if (!strcmp(attr_suffix, DT_THRESHOLD_ATTR_SUFFIX)) {\n" + "> +\t\tif (type == AMBIENT_TEMP)\n" + "> +\t\t\tattr_name = \"max\";\n" + "> +\t\telse if (type == FAN)\n" + "> +\t\t\tattr_name = \"min\";\n" + "> +\t\telse\n" + "> +\t\t\treturn -ENOENT;\n" + "> +\t} else\n" + "> +\t\treturn -ENOENT;\n" + "> +\n" + "> +\tsnprintf(hwmon_attr_name, MAX_ATTR_LEN, \"%s%d_%s\",\n" + "> +\t\t\tsensor_groups[type].name, index, attr_name);\n" + "> +\treturn 0;\n" + "> +}\n" + "> +\n" + "> +static int __init populate_attr_groups(struct platform_device *pdev)\n" + "> +{\n" + "> +\tstruct platform_data *pdata = platform_get_drvdata(pdev);\n" + "> +\tconst struct attribute_group **pgroups = pdata->attr_groups;\n" + "> +\tstruct device_node *opal, *np;\n" + "> +\tenum sensors type;\n" + "> +\tint err = 0;\n" + "> +\n" + "> +\topal = of_find_node_by_path(\"/ibm,opal/sensors\");\n" + "> + if (!opal) {\n" + "> +\t\tpr_err(\"%s: Opal 'sensors' node not found\\n\", __func__);\n" + "> +\t\treturn -ENODEV;\n" + "> + }\n" + "> +\n" + "> +\tfor_each_child_of_node(opal, np) {\n" + "> +\t\tif (np->name == NULL)\n" + "> +\t\t\tcontinue;\n" + "> +\n" + "> +\t\tfor (type = 0; type < MAX_SENSOR_TYPE; type++)\n" + "> +\t\t\tif (of_device_is_compatible(np,\n" + "> +\t\t\t\tsensor_groups[type].compatible)) {\n" + "> +\t\t\t\tsensor_groups[type].attr_count++;\n" + "> +\t\t\t\tbreak;\n" + "> +\t\t\t}\n" + "> +\t}\n" + "> +\n" + "> +\tfor (type = 0; type < MAX_SENSOR_TYPE; type++) {\n" + "> +\t\tif (!sensor_groups[type].attr_count)\n" + "> +\t\t\tcontinue;\n" + "> +\n" + "> +\t\tsensor_groups[type].group.attrs = devm_kzalloc(&pdev->dev,\n" + "> +\t\t\t\t\tsizeof(struct attribute*) *\n" + "> +\t\t\t\t\t(sensor_groups[type].attr_count + 1),\n" + "> +\t\t\t\t\tGFP_KERNEL);\n" + "> +\t\tif (!sensor_groups[type].group.attrs) {\n" + "> +\t\t\tpr_err(\"%s: Failed to allocate memory for attribute\"\n" + "> +\t\t\t\t\t\"array\\n\", __func__);\n" + "> +\t\t\terr = -ENOMEM;\n" + "> +\t\t\tgoto exit_put_node;\n" + "> +\t\t}\n" + "> +\n" + "> +\t\tpgroups[type] = &sensor_groups[type].group;\n" + "> +\t\tpdata->sensors_count += sensor_groups[type].attr_count;\n" + "> +\t\tsensor_groups[type].attr_count = 0;\n" + "> +\t}\n" + "> +\n" + "> +exit_put_node:\n" + "> +\tof_node_put(opal);\n" + "> +\treturn err;\n" + "> +}\n" + "> +\n" + "> +/*\n" + "> + * Iterate through the device tree for each child of sensor node, create\n" + "> + * a sysfs attribute file, the file is named by translating the DT node name\n" + "> + * to the name required by the higher 'hwmon' driver like fan1_input, temp1_max\n" + "> + * etc..\n" + "> + */\n" + "> +static int __init create_device_attrs(struct platform_device *pdev)\n" + "> +{\n" + "> +\tstruct platform_data *pdata = platform_get_drvdata(pdev);\n" + "> +\tconst struct attribute_group **pgroups = pdata->attr_groups;\n" + "> +\tstruct device_node *opal, *np;\n" + "> +\tstruct sensor_data *sdata;\n" + "> +\tconst u32 *sensor_id;\n" + "> +\tenum sensors type;\n" + "> +\tu32 count = 0;\n" + "> +\tint err = 0;\n" + "> +\n" + "> +\topal = of_find_node_by_path(\"/ibm,opal/sensors\");\n" + "> + if (!opal) {\n" + "> +\t\tpr_err(\"%s: Opal 'sensors' node not found\\n\", __func__);\n" + "> +\t\treturn -ENODEV;\n" + "> + }\n" + "> +\n" + "> +\tsdata = devm_kzalloc(&pdev->dev, (pdata->sensors_count) *\n" + "> +\t\t\t sizeof(*sdata), GFP_KERNEL);\n" + "> +\tif (!sdata) {\n" + "> +\t\tpr_err(\"%s: Failed to allocate memory for the sensor_data\",\n" + "> +\t\t\t\t__func__);\n" + "> +\t\terr = -ENOMEM;\n" + "> +\t\tgoto exit_put_node;\n" + "> +\t}\n" + "> +\n" + "> +\tfor_each_child_of_node(opal, np) {\n" + "> + if (np->name == NULL)\n" + "> + continue;\n" + "> +\n" + "> +\t\tfor (type = 0; type < MAX_SENSOR_TYPE; type++)\n" + "> +\t\t\tif (of_device_is_compatible(np,\n" + "> +\t\t\t\t\tsensor_groups[type].compatible))\n" + "> +\t\t\t\tbreak;\n" + "> +\n" + "> +\t\tif (type == MAX_SENSOR_TYPE)\n" + "> +\t\t\tcontinue;\n" + "> +\n" + "> +\t\tsensor_id = of_get_property(np, \"sensor-id\", NULL);\n" + "> +\t\tif (!sensor_id) {\n" + "> +\t\t\tpr_info(\"%s: %s doesn't have sensor-id\\n\", __func__,\n" + "> +\t\t\t\tnp->name);\n" + "> +\t\t\tcontinue;\n" + "> +\t\t}\n" + "> +\n" + "> +\t\tsdata[count].id = *sensor_id;\n" + "> +\t\tsdata[count].type = type;\n" + "> +\t\terr = create_hwmon_attr_name(type, np->name, sdata[count].name);\n" + "> +\t\tif (err)\n" + "> +\t\t\tgoto exit_put_node;\n" + "> +\n" + "> +\t\tsysfs_attr_init(&sdata[count].dev_attr.attr);\n" + "> +\t\tsdata[count].dev_attr.attr.name = sdata[count].name;\n" + "> +\t\tsdata[count].dev_attr.attr.mode = S_IRUGO;\n" + "> +\t\tsdata[count].dev_attr.show = show_sensor;\n" + "> +\n" + "> +\t\tpgroups[type]->attrs[sensor_groups[type].attr_count++] =\n" + "> +\t\t\t\t&sdata[count++].dev_attr.attr;\n" + "> +\t}\n" + "> +\n" + "> +exit_put_node:\n" + "> +\tof_node_put(opal);\n" + "> +\treturn err;\n" + "> +}\n" + "> +\n" + "> +static int __init ibmpowernv_probe(struct platform_device *pdev)\n" + "> +{\n" + "> +\tstruct platform_data *pdata;\n" + "> +\tstruct device *hwmon_dev;\n" + "> +\tint err;\n" + "> +\n" + "> +\tpdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);\n" + "> +\tif (!pdata)\n" + "> +\t\treturn -ENOMEM;\n" + "> +\n" + "> +\tplatform_set_drvdata(pdev, pdata);\n" + "> +\tpdata->sensors_count = 0;\n" + "> +\terr = populate_attr_groups(pdev);\n" + "> +\tif (err)\n" + "> +\t\treturn err;\n" + "> +\n" + "> +\t/* Create sysfs attribute file for each sensor found in the DT */\n" + "> +\terr = create_device_attrs(pdev);\n" + "> +\tif (err)\n" + "> +\t\treturn err;\n" + "> +\n" + "> +\t/* Finally, register with hwmon */\n" + "> +\thwmon_dev = devm_hwmon_device_register_with_groups(&pdev->dev, DRVNAME,\n" + "> +\t\t\t\t\t\t\t pdata,\n" + "> +\t\t\t\t\t\t\t pdata->attr_groups);\n" + "> +\n" + "> +\treturn PTR_ERR_OR_ZERO(hwmon_dev);\n" + "> +}\n" + "> +\n" + "> +static struct platform_driver ibmpowernv_driver = {\n" + "> +\t.driver = {\n" + "> +\t\t.owner = THIS_MODULE,\n" + "> +\t\t.name = DRVNAME,\n" + "> +\t},\n" + "> +};\n" + "> +\n" + "> +static int __init ibmpowernv_init(void)\n" + "> +{\n" + "> +\tint err;\n" + "> +\n" + "> +\tpdevice = platform_device_alloc(DRVNAME, 0);\n" + "> +\tif (!pdevice) {\n" + "> +\t\tpr_err(\"%s: Device allocation failed\\n\", __func__);\n" + "> +\t\terr = -ENOMEM;\n" + "> +\t\tgoto exit;\n" + "> +\t}\n" + "> +\n" + "> +\terr = platform_device_add(pdevice);\n" + "> +\tif (err) {\n" + "> +\t\tpr_err(\"%s: Device addition failed (%d)\\n\", __func__, err);\n" + "> +\t\tgoto exit_device_put;\n" + "> +\t}\n" + "> +\n" + "> +\terr = platform_driver_probe(&ibmpowernv_driver, ibmpowernv_probe);\n" + "> +\tif (err) {\n" + "> +\t\tpr_err(\"%s: Platfrom driver probe failed\\n\", __func__);\n" + "> +\t\tgoto exit_device_del;\n" + "> +\t}\n" + "> +\n" + "> +\treturn 0;\n" + "> +\n" + "> +exit_device_del:\n" + "> +\tplatform_device_del(pdevice);\n" + "> +exit_device_put:\n" + "> +\tplatform_device_put(pdevice);\n" + "> +exit:\n" + "> +\treturn err;\n" + "> +}\n" + "> +\n" + "> +static void __exit ibmpowernv_exit(void)\n" + "> +{\n" + "> +\tplatform_driver_unregister(&ibmpowernv_driver);\n" + "> +\tplatform_device_unregister(pdevice);\n" + "> +}\n" + "> +\n" + "> +MODULE_AUTHOR(\"Neelesh Gupta <neelegup@linux.vnet.ibm.com>\");\n" + "> +MODULE_DESCRIPTION(\"IBM POWERNV platform sensors\");\n" + "> +MODULE_LICENSE(\"GPL\");\n" + "> +\n" + "> +module_init(ibmpowernv_init);\n" + "> +module_exit(ibmpowernv_exit);\n" + ">\n" + "> _______________________________________________\n" + "> Linuxppc-dev mailing list\n" + "> Linuxppc-dev@lists.ozlabs.org\n" + > https://lists.ozlabs.org/listinfo/linuxppc-dev + "\01:2\0" + "b\0" + "<html>\n" + " <head>\n" + " <meta content=\"text/html; charset=UTF-8\" http-equiv=\"Content-Type\">\n" + " </head>\n" + " <body bgcolor=\"#FFFFFF\" text=\"#000000\">\n" + " <small>Any updates on the patch.<br>\n" + " <br>\n" + " - Neelesh</small><br>\n" + " <br>\n" + " <div class=\"moz-cite-prefix\">On 05/19/2014 07:56 PM, Neelesh Gupta\n" + " wrote:<br>\n" + " </div>\n" + " <blockquote\n" + " cite=\"mid:20140519141931.9248.11356.stgit@neelegup-tp-t420.in.ibm.com\"\n" + " type=\"cite\">\n" + " <pre wrap=\"\">This patch adds basic kernel enablement for reading power values, fan\n" + "speed rpm and temperature values on powernv platforms which will\n" + "be exported to user space through sysfs interface.\n" + "\n" + "Test results:\n" + "-------------\n" + "[root@tul163p1 ~]# sensors\n" + "ibmpowernv-isa-0000\n" + "Adapter: ISA adapter\n" + "fan1: 5487 RPM (min = 0 RPM)\n" + "fan2: 5152 RPM (min = 0 RPM)\n" + "fan3: 5590 RPM (min = 0 RPM)\n" + "fan4: 4963 RPM (min = 0 RPM)\n" + "fan5: 0 RPM (min = 0 RPM)\n" + "fan6: 0 RPM (min = 0 RPM)\n" + "fan7: 7488 RPM (min = 0 RPM)\n" + "fan8: 7944 RPM (min = 0 RPM)\n" + "temp1: +39.0\302\260C (high = +0.0\302\260C)\n" + "power1: 192.00 W \n" + "\n" + "[root@tul163p1 ~]# ls /sys/devices/platform/\n" + "alarmtimer ibmpowernv.0 rtc-generic serial8250 uevent\n" + "[root@tul163p1 ~]# ls /sys/devices/platform/ibmpowernv.0/\n" + "driver/ hwmon/ modalias subsystem/ uevent \n" + "[root@tul163p1 ~]# ls /sys/devices/platform/ibmpowernv.0/hwmon/hwmon0/\n" + "device\t fan2_min\tfan4_min fan6_min\tfan8_min power1_input\n" + "fan1_fault fan3_fault\tfan5_fault fan7_fault\tin1_fault subsystem\n" + "fan1_input fan3_input\tfan5_input fan7_input\tin2_fault temp1_input\n" + "fan1_min fan3_min\tfan5_min fan7_min\tin3_fault temp1_max\n" + "fan2_fault fan4_fault\tfan6_fault fan8_fault\tin4_fault uevent\n" + "fan2_input fan4_input\tfan6_input fan8_input\tname\n" + "[root@tul163p1 ~]# \n" + "[root@tul163p1 ~]# ls /sys/class/hwmon/hwmon0/\n" + "device\t fan2_min\tfan4_min fan6_min\tfan8_min power1_input\n" + "fan1_fault fan3_fault\tfan5_fault fan7_fault\tin1_fault subsystem\n" + "fan1_input fan3_input\tfan5_input fan7_input\tin2_fault temp1_input\n" + "fan1_min fan3_min\tfan5_min fan7_min\tin3_fault temp1_max\n" + "fan2_fault fan4_fault\tfan6_fault fan8_fault\tin4_fault uevent\n" + "fan2_input fan4_input\tfan6_input fan8_input\tname\n" + "[root@tul163p1 ~]#\n" + "\n" + "Signed-off-by: Neelesh Gupta <a class=\"moz-txt-link-rfc2396E\" href=\"mailto:neelegup@linux.vnet.ibm.com\"><neelegup@linux.vnet.ibm.com></a>\n" + "---\n" + "\n" + "Changes in v2\n" + "=============\n" + "- Generic use of devm_* functions in hwmon like using devm_kzalloc() for dynamic\n" + " memory request, avoiding the need to explicit free of memory.\n" + " Adding 'struct attribute_group' as member of platform data structure to be\n" + " populated and then passed to devm_hwmon_device_register_with_groups().\n" + "\n" + " Note: Having an array of pointers of 'attribute_group' and each group\n" + " corresponds to 'enum sensors' type. Not completely sure, if it's ideal or\n" + " could have just one group populated with attributes of sensor types?\n" + "\n" + "- 'ibmpowernv' is not hot-pluggable device so moving 'platform_driver' callback\n" + " function (probe) as part of __init code.\n" + "- Fixed issues related to coding style.\n" + "- Other general comments in v1.\n" + "\n" + " drivers/hwmon/Kconfig | 8 +\n" + " drivers/hwmon/Makefile | 1 \n" + " drivers/hwmon/ibmpowernv.c | 368 ++++++++++++++++++++++++++++++++++++++++++++\n" + " 3 files changed, 377 insertions(+)\n" + " create mode 100644 drivers/hwmon/ibmpowernv.c\n" + "\n" + "diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig\n" + "index bc196f4..3e308fa 100644\n" + "--- a/drivers/hwmon/Kconfig\n" + "+++ b/drivers/hwmon/Kconfig\n" + "@@ -554,6 +554,14 @@ config SENSORS_IBMPEX\n" + " \t This driver can also be built as a module. If so, the module\n" + " \t will be called ibmpex.\n" + " \n" + "+config SENSORS_IBMPOWERNV\n" + "+\ttristate \"IBM POWERNV platform sensors\"\n" + "+\tdepends on PPC_POWERNV\n" + "+\tdefault y\n" + "+\thelp\n" + "+\t If you say yes here you get support for the temperature/fan/power\n" + "+\t sensors on your platform.\n" + "+\n" + " config SENSORS_IIO_HWMON\n" + " \ttristate \"Hwmon driver that uses channels specified via iio maps\"\n" + " \tdepends on IIO\n" + "diff --git a/drivers/hwmon/Makefile b/drivers/hwmon/Makefile\n" + "index c48f987..199c401 100644\n" + "--- a/drivers/hwmon/Makefile\n" + "+++ b/drivers/hwmon/Makefile\n" + "@@ -71,6 +71,7 @@ obj-$(CONFIG_SENSORS_ULTRA45)\t+= ultra45_env.o\n" + " obj-$(CONFIG_SENSORS_I5K_AMB)\t+= i5k_amb.o\n" + " obj-$(CONFIG_SENSORS_IBMAEM)\t+= ibmaem.o\n" + " obj-$(CONFIG_SENSORS_IBMPEX)\t+= ibmpex.o\n" + "+obj-$(CONFIG_SENSORS_IBMPOWERNV)+= ibmpowernv.o\n" + " obj-$(CONFIG_SENSORS_IIO_HWMON) += iio_hwmon.o\n" + " obj-$(CONFIG_SENSORS_INA209)\t+= ina209.o\n" + " obj-$(CONFIG_SENSORS_INA2XX)\t+= ina2xx.o\n" + "diff --git a/drivers/hwmon/ibmpowernv.c b/drivers/hwmon/ibmpowernv.c\n" + "new file mode 100644\n" + "index 0000000..afce620\n" + "--- /dev/null\n" + "+++ b/drivers/hwmon/ibmpowernv.c\n" + "@@ -0,0 +1,368 @@\n" + "+/*\n" + "+ * IBM PowerNV platform sensors for temperature/fan/power\n" + "+ * Copyright (C) 2014 IBM\n" + "+ *\n" + "+ * This program is free software; you can redistribute it and/or modify\n" + "+ * it under the terms of the GNU General Public License as published by\n" + "+ * the Free Software Foundation; either version 2 of the License, or\n" + "+ * (at your option) any later version.\n" + "+ *\n" + "+ * This program is distributed in the hope that it will be useful,\n" + "+ * but WITHOUT ANY WARRANTY; without even the implied warranty of\n" + "+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n" + "+ * GNU General Public License for more details.\n" + "+ *\n" + "+ * You should have received a copy of the GNU General Public License\n" + "+ * along with this program.\n" + "+ */\n" + "+\n" + "+#include <linux/init.h>\n" + "+#include <linux/module.h>\n" + "+#include <linux/kernel.h>\n" + "+#include <linux/hwmon.h>\n" + "+#include <linux/hwmon-sysfs.h>\n" + "+#include <linux/of.h>\n" + "+#include <linux/slab.h>\n" + "+\n" + "+#include <linux/platform_device.h>\n" + "+#include <asm/opal.h>\n" + "+#include <linux/err.h>\n" + "+\n" + "+#define DRVNAME\t\t\"ibmpowernv\"\n" + "+#define MAX_ATTR_LEN\t32\n" + "+\n" + "+/* Sensor suffix name from DT */\n" + "+#define DT_FAULT_ATTR_SUFFIX\t\t\"faulted\"\n" + "+#define DT_DATA_ATTR_SUFFIX\t\t\"data\"\n" + "+#define DT_THRESHOLD_ATTR_SUFFIX\t\"thrs\"\n" + "+\n" + "+/*\n" + "+ * Enumerates all the types of sensors in the POWERNV platform and does index\n" + "+ * into 'struct sensor_group'\n" + "+ */\n" + "+enum sensors {\n" + "+\tFAN,\n" + "+\tAMBIENT_TEMP,\n" + "+\tPOWER_SUPPLY,\n" + "+\tPOWER_INPUT,\n" + "+\tMAX_SENSOR_TYPE,\n" + "+};\n" + "+\n" + "+static struct sensor_group {\n" + "+\tconst char *name;\n" + "+\tconst char *compatible;\n" + "+\tstruct attribute_group group;\n" + "+\tu32 attr_count;\n" + "+} sensor_groups[] = {\n" + "+\t{\"fan\", \"ibm,opal-sensor-cooling-fan\", {0}, 0},\n" + "+\t{\"temp\", \"ibm,opal-sensor-amb-temp\", {0}, 0},\n" + "+\t{\"in\", \"ibm,opal-sensor-power-supply\", {0}, 0},\n" + "+\t{\"power\", \"ibm,opal-sensor-power\", {0}, 0}\n" + "+};\n" + "+\n" + "+struct sensor_data {\n" + "+\tu32 id; /* An opaque id of the firmware for each sensor */\n" + "+\tenum sensors type;\n" + "+\tchar name[MAX_ATTR_LEN];\n" + "+\tstruct device_attribute dev_attr;\n" + "+};\n" + "+\n" + "+struct platform_data {\n" + "+\tconst struct attribute_group *attr_groups[MAX_SENSOR_TYPE + 1];\n" + "+\tu32 sensors_count; /* Total count of sensors from each group */\n" + "+};\n" + "+\n" + "+/* Platform device representing all the ibmpowernv sensors */\n" + "+static struct platform_device *pdevice;\n" + "+\n" + "+static ssize_t show_sensor(struct device *dev, struct device_attribute *devattr,\n" + "+\t\t\t char *buf)\n" + "+{\n" + "+\tstruct sensor_data *sdata = container_of(devattr, struct sensor_data,\n" + "+\t\t\t\t\t\t dev_attr);\n" + "+\tssize_t ret;\n" + "+\tu32 x;\n" + "+\n" + "+\tret = opal_get_sensor_data(sdata->id, &x);\n" + "+\tif (ret) {\n" + "+\t\tpr_err(\"%s: Failed to get opal sensor data\\n\", __func__);\n" + "+\t\treturn ret;\n" + "+\t}\n" + "+\n" + "+\t/* Convert temperature to milli-degrees */\n" + "+\tif (sdata->type == AMBIENT_TEMP)\n" + "+\t\tx *= 1000;\n" + "+\t/* Convert power to micro-watts */\n" + "+\telse if (sdata->type == POWER_INPUT)\n" + "+\t\tx *= 1000000;\n" + "+\n" + "+\treturn sprintf(buf, \"%d\\n\", x);\n" + "+}\n" + "+\n" + "+static void __init get_sensor_index_attr(const char *name, u32 *index, char *attr)\n" + "+{\n" + "+\tchar *hash_pos = strchr(name, '#');\n" + "+\tchar *dash_pos;\n" + "+\tu32 copy_len;\n" + "+\tchar buf[8];\n" + "+\n" + "+\tmemset(buf, 0, sizeof(buf));\n" + "+\t*index = 0;\n" + "+\t*attr = '\\0';\n" + "+\n" + "+\tif (hash_pos) {\n" + "+\t\tdash_pos = strchr(hash_pos, '-');\n" + "+\t\tif (dash_pos) {\n" + "+\t\t\tcopy_len = dash_pos - hash_pos - 1;\n" + "+\t\t\tif (copy_len < sizeof(buf)) {\n" + "+\t\t\t\tstrncpy(buf, hash_pos + 1, copy_len);\n" + "+\t\t\t\tsscanf(buf, \"%d\", index);\n" + "+\t\t\t}\n" + "+\n" + "+\t\t\tstrncpy(attr, dash_pos + 1, MAX_ATTR_LEN);\n" + "+\t\t}\n" + "+\t}\n" + "+}\n" + "+\n" + "+/*\n" + "+ * This function translates the DT node name into the 'hwmon' attribute name.\n" + "+ * IBMPOWERNV device node appear like cooling-fan#2-data, amb-temp#1-thrs etc.\n" + "+ * which need to be mapped as fan2_input, temp1_max respectively before\n" + "+ * populating them inside hwmon device class..\n" + "+ */\n" + "+static int __init create_hwmon_attr_name(enum sensors type, const char *node_name,\n" + "+\t\t\t\t char *hwmon_attr_name)\n" + "+{\n" + "+\tchar attr_suffix[MAX_ATTR_LEN];\n" + "+\tchar *attr_name;\n" + "+\tu32 index;\n" + "+\n" + "+\tget_sensor_index_attr(node_name, &index, attr_suffix);\n" + "+\tif (!index || !strlen(attr_suffix)) {\n" + "+\t\tpr_info(\"%s: Sensor device node name is invalid, name: %s\\n\",\n" + "+\t\t\t\t__func__, node_name);\n" + "+\t\treturn -EINVAL;\n" + "+\t}\n" + "+\n" + "+\tif (!strcmp(attr_suffix, DT_FAULT_ATTR_SUFFIX))\n" + "+\t\tattr_name = \"fault\";\n" + "+\telse if(!strcmp(attr_suffix, DT_DATA_ATTR_SUFFIX))\n" + "+\t\tattr_name = \"input\";\n" + "+\telse if (!strcmp(attr_suffix, DT_THRESHOLD_ATTR_SUFFIX)) {\n" + "+\t\tif (type == AMBIENT_TEMP)\n" + "+\t\t\tattr_name = \"max\";\n" + "+\t\telse if (type == FAN)\n" + "+\t\t\tattr_name = \"min\";\n" + "+\t\telse\n" + "+\t\t\treturn -ENOENT;\n" + "+\t} else\n" + "+\t\treturn -ENOENT;\n" + "+\n" + "+\tsnprintf(hwmon_attr_name, MAX_ATTR_LEN, \"%s%d_%s\",\n" + "+\t\t\tsensor_groups[type].name, index, attr_name);\n" + "+\treturn 0;\n" + "+}\n" + "+\n" + "+static int __init populate_attr_groups(struct platform_device *pdev)\n" + "+{\n" + "+\tstruct platform_data *pdata = platform_get_drvdata(pdev);\n" + "+\tconst struct attribute_group **pgroups = pdata->attr_groups;\n" + "+\tstruct device_node *opal, *np;\n" + "+\tenum sensors type;\n" + "+\tint err = 0;\n" + "+\n" + "+\topal = of_find_node_by_path(\"/ibm,opal/sensors\");\n" + "+ if (!opal) {\n" + "+\t\tpr_err(\"%s: Opal 'sensors' node not found\\n\", __func__);\n" + "+\t\treturn -ENODEV;\n" + "+ }\n" + "+\n" + "+\tfor_each_child_of_node(opal, np) {\n" + "+\t\tif (np->name == NULL)\n" + "+\t\t\tcontinue;\n" + "+\n" + "+\t\tfor (type = 0; type < MAX_SENSOR_TYPE; type++)\n" + "+\t\t\tif (of_device_is_compatible(np,\n" + "+\t\t\t\tsensor_groups[type].compatible)) {\n" + "+\t\t\t\tsensor_groups[type].attr_count++;\n" + "+\t\t\t\tbreak;\n" + "+\t\t\t}\n" + "+\t}\n" + "+\n" + "+\tfor (type = 0; type < MAX_SENSOR_TYPE; type++) {\n" + "+\t\tif (!sensor_groups[type].attr_count)\n" + "+\t\t\tcontinue;\n" + "+\n" + "+\t\tsensor_groups[type].group.attrs = devm_kzalloc(&pdev->dev,\n" + "+\t\t\t\t\tsizeof(struct attribute*) *\n" + "+\t\t\t\t\t(sensor_groups[type].attr_count + 1),\n" + "+\t\t\t\t\tGFP_KERNEL);\n" + "+\t\tif (!sensor_groups[type].group.attrs) {\n" + "+\t\t\tpr_err(\"%s: Failed to allocate memory for attribute\"\n" + "+\t\t\t\t\t\"array\\n\", __func__);\n" + "+\t\t\terr = -ENOMEM;\n" + "+\t\t\tgoto exit_put_node;\n" + "+\t\t}\n" + "+\n" + "+\t\tpgroups[type] = &sensor_groups[type].group;\n" + "+\t\tpdata->sensors_count += sensor_groups[type].attr_count;\n" + "+\t\tsensor_groups[type].attr_count = 0;\n" + "+\t}\n" + "+\n" + "+exit_put_node:\n" + "+\tof_node_put(opal);\n" + "+\treturn err;\n" + "+}\n" + "+\n" + "+/*\n" + "+ * Iterate through the device tree for each child of sensor node, create\n" + "+ * a sysfs attribute file, the file is named by translating the DT node name\n" + "+ * to the name required by the higher 'hwmon' driver like fan1_input, temp1_max\n" + "+ * etc..\n" + "+ */\n" + "+static int __init create_device_attrs(struct platform_device *pdev)\n" + "+{\n" + "+\tstruct platform_data *pdata = platform_get_drvdata(pdev);\n" + "+\tconst struct attribute_group **pgroups = pdata->attr_groups;\n" + "+\tstruct device_node *opal, *np;\n" + "+\tstruct sensor_data *sdata;\n" + "+\tconst u32 *sensor_id;\n" + "+\tenum sensors type;\n" + "+\tu32 count = 0;\n" + "+\tint err = 0;\n" + "+\n" + "+\topal = of_find_node_by_path(\"/ibm,opal/sensors\");\n" + "+ if (!opal) {\n" + "+\t\tpr_err(\"%s: Opal 'sensors' node not found\\n\", __func__);\n" + "+\t\treturn -ENODEV;\n" + "+ }\n" + "+\n" + "+\tsdata = devm_kzalloc(&pdev->dev, (pdata->sensors_count) *\n" + "+\t\t\t sizeof(*sdata), GFP_KERNEL);\n" + "+\tif (!sdata) {\n" + "+\t\tpr_err(\"%s: Failed to allocate memory for the sensor_data\",\n" + "+\t\t\t\t__func__);\n" + "+\t\terr = -ENOMEM;\n" + "+\t\tgoto exit_put_node;\n" + "+\t}\n" + "+\n" + "+\tfor_each_child_of_node(opal, np) {\n" + "+ if (np->name == NULL)\n" + "+ continue;\n" + "+\n" + "+\t\tfor (type = 0; type < MAX_SENSOR_TYPE; type++)\n" + "+\t\t\tif (of_device_is_compatible(np,\n" + "+\t\t\t\t\tsensor_groups[type].compatible))\n" + "+\t\t\t\tbreak;\n" + "+\n" + "+\t\tif (type == MAX_SENSOR_TYPE)\n" + "+\t\t\tcontinue;\n" + "+\n" + "+\t\tsensor_id = of_get_property(np, \"sensor-id\", NULL);\n" + "+\t\tif (!sensor_id) {\n" + "+\t\t\tpr_info(\"%s: %s doesn't have sensor-id\\n\", __func__,\n" + "+\t\t\t\tnp->name);\n" + "+\t\t\tcontinue;\n" + "+\t\t}\n" + "+\n" + "+\t\tsdata[count].id = *sensor_id;\n" + "+\t\tsdata[count].type = type;\n" + "+\t\terr = create_hwmon_attr_name(type, np->name, sdata[count].name);\n" + "+\t\tif (err)\n" + "+\t\t\tgoto exit_put_node;\n" + "+\n" + "+\t\tsysfs_attr_init(&sdata[count].dev_attr.attr);\n" + "+\t\tsdata[count].dev_attr.attr.name = sdata[count].name;\n" + "+\t\tsdata[count].dev_attr.attr.mode = S_IRUGO;\n" + "+\t\tsdata[count].dev_attr.show = show_sensor;\n" + "+\n" + "+\t\tpgroups[type]->attrs[sensor_groups[type].attr_count++] =\n" + "+\t\t\t\t&sdata[count++].dev_attr.attr;\n" + "+\t}\n" + "+\n" + "+exit_put_node:\n" + "+\tof_node_put(opal);\n" + "+\treturn err;\n" + "+}\n" + "+\n" + "+static int __init ibmpowernv_probe(struct platform_device *pdev)\n" + "+{\n" + "+\tstruct platform_data *pdata;\n" + "+\tstruct device *hwmon_dev;\n" + "+\tint err;\n" + "+\n" + "+\tpdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);\n" + "+\tif (!pdata)\n" + "+\t\treturn -ENOMEM;\n" + "+\n" + "+\tplatform_set_drvdata(pdev, pdata);\n" + "+\tpdata->sensors_count = 0;\n" + "+\terr = populate_attr_groups(pdev);\n" + "+\tif (err)\n" + "+\t\treturn err;\n" + "+\n" + "+\t/* Create sysfs attribute file for each sensor found in the DT */\n" + "+\terr = create_device_attrs(pdev);\n" + "+\tif (err)\n" + "+\t\treturn err;\n" + "+\n" + "+\t/* Finally, register with hwmon */\n" + "+\thwmon_dev = devm_hwmon_device_register_with_groups(&pdev->dev, DRVNAME,\n" + "+\t\t\t\t\t\t\t pdata,\n" + "+\t\t\t\t\t\t\t pdata->attr_groups);\n" + "+\n" + "+\treturn PTR_ERR_OR_ZERO(hwmon_dev);\n" + "+}\n" + "+\n" + "+static struct platform_driver ibmpowernv_driver = {\n" + "+\t.driver = {\n" + "+\t\t.owner = THIS_MODULE,\n" + "+\t\t.name = DRVNAME,\n" + "+\t},\n" + "+};\n" + "+\n" + "+static int __init ibmpowernv_init(void)\n" + "+{\n" + "+\tint err;\n" + "+\n" + "+\tpdevice = platform_device_alloc(DRVNAME, 0);\n" + "+\tif (!pdevice) {\n" + "+\t\tpr_err(\"%s: Device allocation failed\\n\", __func__);\n" + "+\t\terr = -ENOMEM;\n" + "+\t\tgoto exit;\n" + "+\t}\n" + "+\n" + "+\terr = platform_device_add(pdevice);\n" + "+\tif (err) {\n" + "+\t\tpr_err(\"%s: Device addition failed (%d)\\n\", __func__, err);\n" + "+\t\tgoto exit_device_put;\n" + "+\t}\n" + "+\n" + "+\terr = platform_driver_probe(&ibmpowernv_driver, ibmpowernv_probe);\n" + "+\tif (err) {\n" + "+\t\tpr_err(\"%s: Platfrom driver probe failed\\n\", __func__);\n" + "+\t\tgoto exit_device_del;\n" + "+\t}\n" + "+\n" + "+\treturn 0;\n" + "+\n" + "+exit_device_del:\n" + "+\tplatform_device_del(pdevice);\n" + "+exit_device_put:\n" + "+\tplatform_device_put(pdevice);\n" + "+exit:\n" + "+\treturn err;\n" + "+}\n" + "+\n" + "+static void __exit ibmpowernv_exit(void)\n" + "+{\n" + "+\tplatform_driver_unregister(&ibmpowernv_driver);\n" + "+\tplatform_device_unregister(pdevice);\n" + "+}\n" + "+\n" + "+MODULE_AUTHOR(\"Neelesh Gupta <a class=\"moz-txt-link-rfc2396E\" href=\"mailto:neelegup@linux.vnet.ibm.com\"><neelegup@linux.vnet.ibm.com></a>\");\n" + "+MODULE_DESCRIPTION(\"IBM POWERNV platform sensors\");\n" + "+MODULE_LICENSE(\"GPL\");\n" + "+\n" + "+module_init(ibmpowernv_init);\n" + "+module_exit(ibmpowernv_exit);\n" + "\n" + "_______________________________________________\n" + "Linuxppc-dev mailing list\n" + "<a class=\"moz-txt-link-abbreviated\" href=\"mailto:Linuxppc-dev@lists.ozlabs.org\">Linuxppc-dev@lists.ozlabs.org</a>\n" + "<a class=\"moz-txt-link-freetext\" href=\"https://lists.ozlabs.org/listinfo/linuxppc-dev\">https://lists.ozlabs.org/listinfo/linuxppc-dev</a></pre>\n" + " </blockquote>\n" + " <br>\n" + " </body>\n" + "</html>\n" -3e9f0b73078265d04722690476e6366e15ccdb22e7fc3d110b4abd9a42be7329 +d5b8ba3bb6e51179494e7da2de2c380864ebec0ba5b8bfe118c93402c269eafc
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