From 3eba2bf7c5fb7863412554cd73646cb80ac293ff Mon Sep 17 00:00:00 2001 From: Henrik Rydberg Date: Tue, 9 Nov 2010 15:15:08 +0000 Subject: [PATCH] hwmon: (applesmc) Dynamic creation of fan files With the dynamic temperature group in place, the setup of fans can be simplified. This patch sets up the fans dynamically, removing a hundred lines of code. Signed-off-by: Henrik Rydberg Signed-off-by: Guenter Roeck --- drivers/hwmon/applesmc.c | 188 +++++++++------------------------------ 1 file changed, 43 insertions(+), 145 deletions(-) diff --git a/drivers/hwmon/applesmc.c b/drivers/hwmon/applesmc.c index d4d647522331..b0792361c52e 100644 --- a/drivers/hwmon/applesmc.c +++ b/drivers/hwmon/applesmc.c @@ -77,20 +77,15 @@ #define FANS_COUNT "FNum" /* r-o ui8 */ #define FANS_MANUAL "FS! " /* r-w ui16 */ -#define FAN_ACTUAL_SPEED "F0Ac" /* r-o fpe2 (2 bytes) */ -#define FAN_MIN_SPEED "F0Mn" /* r-o fpe2 (2 bytes) */ -#define FAN_MAX_SPEED "F0Mx" /* r-o fpe2 (2 bytes) */ -#define FAN_SAFE_SPEED "F0Sf" /* r-o fpe2 (2 bytes) */ -#define FAN_TARGET_SPEED "F0Tg" /* r-w fpe2 (2 bytes) */ -#define FAN_POSITION "F0ID" /* r-o char[16] */ +#define FAN_ID_FMT "F%dID" /* r-o char[16] */ /* List of keys used to read/write fan speeds */ -static const char* fan_speed_keys[] = { - FAN_ACTUAL_SPEED, - FAN_MIN_SPEED, - FAN_MAX_SPEED, - FAN_SAFE_SPEED, - FAN_TARGET_SPEED +static const char *const fan_speed_fmt[] = { + "F%dAc", /* actual speed */ + "F%dMn", /* minimum speed (rw) */ + "F%dMx", /* maximum speed */ + "F%dSf", /* safe speed - not all models */ + "F%dTg", /* target speed (manual: rw) */ }; #define INIT_TIMEOUT_MSECS 5000 /* wait up to 5s for device init ... */ @@ -104,7 +99,8 @@ static const char* fan_speed_keys[] = { #define SENSOR_Y 1 #define SENSOR_Z 2 -#define to_index(attr) (to_sensor_dev_attr(attr)->index) +#define to_index(attr) (to_sensor_dev_attr(attr)->index & 0xffff) +#define to_option(attr) (to_sensor_dev_attr(attr)->index >> 16) /* Dynamic device node attributes */ struct applesmc_dev_attr { @@ -117,6 +113,7 @@ struct applesmc_node_group { char *format; /* format string */ void *show; /* show function */ void *store; /* store function */ + int option; /* function argument */ struct applesmc_dev_attr *nodes; /* dynamic node array */ }; @@ -133,6 +130,7 @@ struct applesmc_entry { static struct applesmc_registers { struct mutex mutex; /* register read/write mutex */ unsigned int key_count; /* number of SMC registers */ + unsigned int fan_count; /* number of fans */ unsigned int temp_count; /* number of temperature registers */ unsigned int temp_begin; /* temperature lower index bound */ unsigned int temp_end; /* temperature upper index bound */ @@ -154,9 +152,6 @@ static u8 backlight_state[2]; static struct device *hwmon_dev; static struct input_polled_dev *applesmc_idev; -/* The number of fans handled by the driver */ -static unsigned int fans_handled; - /* * Last index written to key_at_index sysfs file, and value to use for all other * key_at_index_* sysfs files. @@ -483,22 +478,6 @@ static void applesmc_device_init(void) pr_warn("failed to init the device\n"); } -/* - * applesmc_get_fan_count - get the number of fans. - */ -static int applesmc_get_fan_count(void) -{ - int ret; - u8 buffer[1]; - - ret = applesmc_read_key(FANS_COUNT, buffer, 1); - - if (ret) - return ret; - else - return buffer[0]; -} - /* * applesmc_init_smcreg_try - Try to initialize register cache. Idempotent. */ @@ -506,6 +485,7 @@ static int applesmc_init_smcreg_try(void) { struct applesmc_registers *s = &smcreg; bool left_light_sensor, right_light_sensor; + u8 tmp[1]; int ret; if (s->init_complete) @@ -520,6 +500,11 @@ static int applesmc_init_smcreg_try(void) if (!s->cache) return -ENOMEM; + ret = applesmc_read_key(FANS_COUNT, tmp, 1); + if (ret) + return ret; + s->fan_count = tmp[0]; + ret = applesmc_get_lower_bound(&s->temp_begin, "T"); if (ret) return ret; @@ -544,8 +529,8 @@ static int applesmc_init_smcreg_try(void) s->num_light_sensors = left_light_sensor + right_light_sensor; s->init_complete = true; - pr_info("key=%d temp=%d acc=%d lux=%d kbd=%d\n", - s->key_count, s->temp_count, + pr_info("key=%d fan=%d temp=%d acc=%d lux=%d kbd=%d\n", + s->key_count, s->fan_count, s->temp_count, s->has_accelerometer, s->num_light_sensors, s->has_key_backlight); @@ -776,14 +761,8 @@ static ssize_t applesmc_show_fan_speed(struct device *dev, unsigned int speed = 0; char newkey[5]; u8 buffer[2]; - struct sensor_device_attribute_2 *sensor_attr = - to_sensor_dev_attr_2(attr); - newkey[0] = fan_speed_keys[sensor_attr->nr][0]; - newkey[1] = '0' + sensor_attr->index; - newkey[2] = fan_speed_keys[sensor_attr->nr][2]; - newkey[3] = fan_speed_keys[sensor_attr->nr][3]; - newkey[4] = 0; + sprintf(newkey, fan_speed_fmt[to_option(attr)], to_index(attr)); ret = applesmc_read_key(newkey, buffer, 2); speed = ((buffer[0] << 8 | buffer[1]) >> 2); @@ -802,19 +781,13 @@ static ssize_t applesmc_store_fan_speed(struct device *dev, u32 speed; char newkey[5]; u8 buffer[2]; - struct sensor_device_attribute_2 *sensor_attr = - to_sensor_dev_attr_2(attr); speed = simple_strtoul(sysfsbuf, NULL, 10); if (speed > 0x4000) /* Bigger than a 14-bit value */ return -EINVAL; - newkey[0] = fan_speed_keys[sensor_attr->nr][0]; - newkey[1] = '0' + sensor_attr->index; - newkey[2] = fan_speed_keys[sensor_attr->nr][2]; - newkey[3] = fan_speed_keys[sensor_attr->nr][3]; - newkey[4] = 0; + sprintf(newkey, fan_speed_fmt[to_option(attr)], to_index(attr)); buffer[0] = (speed >> 6) & 0xff; buffer[1] = (speed << 2) & 0xff; @@ -827,15 +800,14 @@ static ssize_t applesmc_store_fan_speed(struct device *dev, } static ssize_t applesmc_show_fan_manual(struct device *dev, - struct device_attribute *devattr, char *sysfsbuf) + struct device_attribute *attr, char *sysfsbuf) { int ret; u16 manual = 0; u8 buffer[2]; - struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); ret = applesmc_read_key(FANS_MANUAL, buffer, 2); - manual = ((buffer[0] << 8 | buffer[1]) >> attr->index) & 0x01; + manual = ((buffer[0] << 8 | buffer[1]) >> to_index(attr)) & 0x01; if (ret) return ret; @@ -844,14 +816,13 @@ static ssize_t applesmc_show_fan_manual(struct device *dev, } static ssize_t applesmc_store_fan_manual(struct device *dev, - struct device_attribute *devattr, + struct device_attribute *attr, const char *sysfsbuf, size_t count) { int ret; u8 buffer[2]; u32 input; u16 val; - struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); input = simple_strtoul(sysfsbuf, NULL, 10); @@ -861,9 +832,9 @@ static ssize_t applesmc_store_fan_manual(struct device *dev, goto out; if (input) - val = val | (0x01 << attr->index); + val = val | (0x01 << to_index(attr)); else - val = val & ~(0x01 << attr->index); + val = val & ~(0x01 << to_index(attr)); buffer[0] = (val >> 8) & 0xFF; buffer[1] = val & 0xFF; @@ -883,14 +854,8 @@ static ssize_t applesmc_show_fan_position(struct device *dev, int ret; char newkey[5]; u8 buffer[17]; - struct sensor_device_attribute_2 *sensor_attr = - to_sensor_dev_attr_2(attr); - newkey[0] = FAN_POSITION[0]; - newkey[1] = '0' + sensor_attr->index; - newkey[2] = FAN_POSITION[2]; - newkey[3] = FAN_POSITION[3]; - newkey[4] = 0; + sprintf(newkey, FAN_ID_FMT, to_index(attr)); ret = applesmc_read_key(newkey, buffer, 16); buffer[16] = 0; @@ -1069,62 +1034,15 @@ static struct attribute *key_enumeration_attributes[] = { static const struct attribute_group key_enumeration_group = { .attrs = key_enumeration_attributes }; -/* - * Macro defining SENSOR_DEVICE_ATTR for a fan sysfs entries. - * - show actual speed - * - show/store minimum speed - * - show maximum speed - * - show safe speed - * - show/store target speed - * - show/store manual mode - */ -#define sysfs_fan_speeds_offset(offset) \ -static SENSOR_DEVICE_ATTR_2(fan##offset##_input, S_IRUGO, \ - applesmc_show_fan_speed, NULL, 0, offset-1); \ -\ -static SENSOR_DEVICE_ATTR_2(fan##offset##_min, S_IRUGO | S_IWUSR, \ - applesmc_show_fan_speed, applesmc_store_fan_speed, 1, offset-1); \ -\ -static SENSOR_DEVICE_ATTR_2(fan##offset##_max, S_IRUGO, \ - applesmc_show_fan_speed, NULL, 2, offset-1); \ -\ -static SENSOR_DEVICE_ATTR_2(fan##offset##_safe, S_IRUGO, \ - applesmc_show_fan_speed, NULL, 3, offset-1); \ -\ -static SENSOR_DEVICE_ATTR_2(fan##offset##_output, S_IRUGO | S_IWUSR, \ - applesmc_show_fan_speed, applesmc_store_fan_speed, 4, offset-1); \ -\ -static SENSOR_DEVICE_ATTR(fan##offset##_manual, S_IRUGO | S_IWUSR, \ - applesmc_show_fan_manual, applesmc_store_fan_manual, offset-1); \ -\ -static SENSOR_DEVICE_ATTR(fan##offset##_label, S_IRUGO, \ - applesmc_show_fan_position, NULL, offset-1); \ -\ -static struct attribute *fan##offset##_attributes[] = { \ - &sensor_dev_attr_fan##offset##_input.dev_attr.attr, \ - &sensor_dev_attr_fan##offset##_min.dev_attr.attr, \ - &sensor_dev_attr_fan##offset##_max.dev_attr.attr, \ - &sensor_dev_attr_fan##offset##_safe.dev_attr.attr, \ - &sensor_dev_attr_fan##offset##_output.dev_attr.attr, \ - &sensor_dev_attr_fan##offset##_manual.dev_attr.attr, \ - &sensor_dev_attr_fan##offset##_label.dev_attr.attr, \ - NULL \ -}; - -/* - * Create the needed functions for each fan using the macro defined above - * (4 fans are supported) - */ -sysfs_fan_speeds_offset(1); -sysfs_fan_speeds_offset(2); -sysfs_fan_speeds_offset(3); -sysfs_fan_speeds_offset(4); - -static const struct attribute_group fan_attribute_groups[] = { - { .attrs = fan1_attributes }, - { .attrs = fan2_attributes }, - { .attrs = fan3_attributes }, - { .attrs = fan4_attributes }, +static struct applesmc_node_group fan_group[] = { + { "fan%d_label", applesmc_show_fan_position }, + { "fan%d_input", applesmc_show_fan_speed, NULL, 0 }, + { "fan%d_min", applesmc_show_fan_speed, applesmc_store_fan_speed, 1 }, + { "fan%d_max", applesmc_show_fan_speed, NULL, 2 }, + { "fan%d_safe", applesmc_show_fan_speed, NULL, 3 }, + { "fan%d_output", applesmc_show_fan_speed, applesmc_store_fan_speed, 4 }, + { "fan%d_manual", applesmc_show_fan_manual, applesmc_store_fan_manual }, + { } }; static struct applesmc_node_group temp_group[] = { @@ -1171,7 +1089,7 @@ static int applesmc_create_nodes(struct applesmc_node_group *groups, int num) for (i = 0; i < num; i++) { node = &grp->nodes[i]; sprintf(node->name, grp->format, i + 1); - node->sda.index = i; + node->sda.index = (grp->option << 16) | (i & 0xffff); node->sda.dev_attr.show = grp->show; node->sda.dev_attr.store = grp->store; attr = &node->sda.dev_attr.attr; @@ -1287,7 +1205,6 @@ static __initdata struct dmi_system_id applesmc_whitelist[] = { static int __init applesmc_init(void) { int ret; - int count; if (!dmi_check_system(applesmc_whitelist)) { pr_warn("supported laptop not found!\n"); @@ -1326,25 +1243,9 @@ static int __init applesmc_init(void) if (ret) goto out_name; - /* create fan files */ - count = applesmc_get_fan_count(); - if (count < 0) - pr_err("Cannot get the number of fans\n"); - else - pr_info("%d fans found\n", count); - - if (count > 4) { - count = 4; - pr_warn("A maximum of 4 fans are supported by this driver\n"); - } - - while (fans_handled < count) { - ret = sysfs_create_group(&pdev->dev.kobj, - &fan_attribute_groups[fans_handled]); - if (ret) - goto out_fans; - fans_handled++; - } + ret = applesmc_create_nodes(fan_group, smcreg.fan_count); + if (ret) + goto out_info; ret = applesmc_create_nodes(temp_group, smcreg.temp_count); if (ret) @@ -1402,9 +1303,8 @@ out_accelerometer: out_temperature: applesmc_destroy_nodes(temp_group); out_fans: - while (fans_handled) - sysfs_remove_group(&pdev->dev.kobj, - &fan_attribute_groups[--fans_handled]); + applesmc_destroy_nodes(fan_group); +out_info: sysfs_remove_group(&pdev->dev.kobj, &key_enumeration_group); out_name: sysfs_remove_file(&pdev->dev.kobj, &dev_attr_name.attr); @@ -1433,9 +1333,7 @@ static void __exit applesmc_exit(void) if (smcreg.has_accelerometer) applesmc_release_accelerometer(); applesmc_destroy_nodes(temp_group); - while (fans_handled) - sysfs_remove_group(&pdev->dev.kobj, - &fan_attribute_groups[--fans_handled]); + applesmc_destroy_nodes(fan_group); sysfs_remove_group(&pdev->dev.kobj, &key_enumeration_group); sysfs_remove_file(&pdev->dev.kobj, &dev_attr_name.attr); applesmc_destroy_smcreg(); -- 2.20.1