From 3df2f59f0aae2f5380a9d8037c91dcab75c4478d Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?C=C3=A9dric=20Le=20Goater?= Date: Wed, 8 Apr 2015 19:19:50 +0200 Subject: hwmon: (ibmpowernv) pretty print labels MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The new OPAL device tree adds a few properties which can be used to add extra information on the sensor label. In the case of a cpu core sensor, the firmware exposes the physical identifier of the core in the "ibm,pir" property. The driver translates this identifier in a linux cpu number and prints out a range corresponding to the hardware threads of the core (as they share the same sensor). The numbering gives a hint on the localization of the core in the system (which socket, which chip). Signed-off-by: Cédric Le Goater Signed-off-by: Guenter Roeck --- drivers/hwmon/ibmpowernv.c | 41 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 41 insertions(+) (limited to 'drivers/hwmon/ibmpowernv.c') diff --git a/drivers/hwmon/ibmpowernv.c b/drivers/hwmon/ibmpowernv.c index 1180ce631377..7108daf056b0 100644 --- a/drivers/hwmon/ibmpowernv.c +++ b/drivers/hwmon/ibmpowernv.c @@ -30,6 +30,7 @@ #include #include #include +#include #define MAX_ATTR_LEN 32 #define MAX_LABEL_LEN 64 @@ -112,13 +113,53 @@ static ssize_t show_label(struct device *dev, struct device_attribute *devattr, return sprintf(buf, "%s\n", sdata->label); } +static int __init get_logical_cpu(int hwcpu) +{ + int cpu; + + for_each_possible_cpu(cpu) + if (get_hard_smp_processor_id(cpu) == hwcpu) + return cpu; + + return -ENOENT; +} + static void __init make_sensor_label(struct device_node *np, struct sensor_data *sdata, const char *label) { + u32 id; size_t n; n = snprintf(sdata->label, sizeof(sdata->label), "%s", label); + + /* + * Core temp pretty print + */ + if (!of_property_read_u32(np, "ibm,pir", &id)) { + int cpuid = get_logical_cpu(id); + + if (cpuid >= 0) + /* + * The digital thermal sensors are associated + * with a core. Let's print out the range of + * cpu ids corresponding to the hardware + * threads of the core. + */ + n += snprintf(sdata->label + n, + sizeof(sdata->label) - n, " %d-%d", + cpuid, cpuid + threads_per_core - 1); + else + n += snprintf(sdata->label + n, + sizeof(sdata->label) - n, " phy%d", id); + } + + /* + * Membuffer pretty print + */ + if (!of_property_read_u32(np, "ibm,chip-id", &id)) + n += snprintf(sdata->label + n, sizeof(sdata->label) - n, + " %d", id & 0xffff); } static int get_sensor_index_attr(const char *name, u32 *index, char *attr) -- cgit v1.2.3