Merge branch 'fixes-jgarzik' of git://git.kernel.org/pub/scm/linux/kernel/git/linvill...

[sfrench/cifs-2.6.git] / drivers / acpi / sbs.c

diff --git a/drivers/acpi/sbs.c b/drivers/acpi/sbs.c
index c4f9641147c4cefc81ccaa990f1733bc0bca8008..6045cdbe176beafe7f250c65a0bf93b3fa428da7 100644 (file)
--- a/drivers/acpi/sbs.c
+++ b/drivers/acpi/sbs.c
@@ -29,9 +29,11 @@
 #include <linux/moduleparam.h>
 #include <linux/kernel.h>
 
+#ifdef CONFIG_ACPI_PROCFS_POWER
 #include <linux/proc_fs.h>
 #include <linux/seq_file.h>
 #include <asm/uaccess.h>
+#endif
 
 #include <linux/acpi.h>
 #include <linux/timer.h>
@@ -86,7 +88,9 @@ MODULE_DEVICE_TABLE(acpi, sbs_device_ids);
 struct acpi_battery {
        struct power_supply bat;
        struct acpi_sbs *sbs;
+#ifdef CONFIG_ACPI_PROCFS_POWER
        struct proc_dir_entry *proc_entry;
+#endif
        unsigned long update_time;
        char name[8];
        char manufacturer_name[ACPI_SBS_BLOCK_MAX];
@@ -109,6 +113,7 @@ struct acpi_battery {
        u16 spec;
        u8 id;
        u8 present:1;
+       u8 have_sysfs_alarm:1;
 };
 
 #define to_acpi_battery(x) container_of(x, struct acpi_battery, bat);
@@ -118,7 +123,9 @@ struct acpi_sbs {
        struct acpi_device *device;
        struct acpi_smb_hc *hc;
        struct mutex lock;
+#ifdef CONFIG_ACPI_PROCFS_POWER
        struct proc_dir_entry *charger_entry;
+#endif
        struct acpi_battery battery[MAX_SBS_BAT];
        u8 batteries_supported:4;
        u8 manager_present:1;
@@ -428,10 +435,41 @@ static int acpi_ac_get_present(struct acpi_sbs *sbs)
        return result;
 }
 
+static ssize_t acpi_battery_alarm_show(struct device *dev,
+                                       struct device_attribute *attr,
+                                       char *buf)
+{
+       struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev));
+       acpi_battery_get_alarm(battery);
+       return sprintf(buf, "%d\n", battery->alarm_capacity *
+                               acpi_battery_scale(battery) * 1000);
+}
+
+static ssize_t acpi_battery_alarm_store(struct device *dev,
+                                       struct device_attribute *attr,
+                                       const char *buf, size_t count)
+{
+       unsigned long x;
+       struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev));
+       if (sscanf(buf, "%ld\n", &x) == 1)
+               battery->alarm_capacity = x /
+                       (1000 * acpi_battery_scale(battery));
+       if (battery->present)
+               acpi_battery_set_alarm(battery);
+       return count;
+}
+
+static struct device_attribute alarm_attr = {
+       .attr = {.name = "alarm", .mode = 0644, .owner = THIS_MODULE},
+       .show = acpi_battery_alarm_show,
+       .store = acpi_battery_alarm_store,
+};
+
 /* --------------------------------------------------------------------------
                               FS Interface (/proc/acpi)
    -------------------------------------------------------------------------- */
 
+#ifdef CONFIG_ACPI_PROCFS_POWER
 /* Generic Routines */
 static int
 acpi_sbs_add_fs(struct proc_dir_entry **dir,
@@ -705,6 +743,8 @@ static struct file_operations acpi_ac_state_fops = {
        .owner = THIS_MODULE,
 };
 
+#endif
+
 /* --------------------------------------------------------------------------
                                  Driver Interface
    -------------------------------------------------------------------------- */
@@ -750,10 +790,12 @@ static int acpi_battery_add(struct acpi_sbs *sbs, int id)
                return result;
 
        sprintf(battery->name, ACPI_BATTERY_DIR_NAME, id);
+#ifdef CONFIG_ACPI_PROCFS_POWER
        acpi_sbs_add_fs(&battery->proc_entry, acpi_battery_dir,
                        battery->name, &acpi_battery_info_fops,
                        &acpi_battery_state_fops, &acpi_battery_alarm_fops,
                        battery);
+#endif
        battery->bat.name = battery->name;
        battery->bat.type = POWER_SUPPLY_TYPE_BATTERY;
        if (!acpi_battery_mode(battery)) {
@@ -767,6 +809,13 @@ static int acpi_battery_add(struct acpi_sbs *sbs, int id)
        }
        battery->bat.get_property = acpi_sbs_battery_get_property;
        result = power_supply_register(&sbs->device->dev, &battery->bat);
+       if (result)
+               goto end;
+       result = device_create_file(battery->bat.dev, &alarm_attr);
+       if (result)
+               goto end;
+       battery->have_sysfs_alarm = 1;
+      end:
        printk(KERN_INFO PREFIX "%s [%s]: Battery Slot [%s] (battery %s)\n",
               ACPI_SBS_DEVICE_NAME, acpi_device_bid(sbs->device),
               battery->name, sbs->battery->present ? "present" : "absent");
@@ -775,12 +824,17 @@ static int acpi_battery_add(struct acpi_sbs *sbs, int id)
 
 static void acpi_battery_remove(struct acpi_sbs *sbs, int id)
 {
-       if (sbs->battery[id].bat.dev)
-               power_supply_unregister(&sbs->battery[id].bat);
-       if (sbs->battery[id].proc_entry) {
-               acpi_sbs_remove_fs(&(sbs->battery[id].proc_entry),
-                                  acpi_battery_dir);
+       struct acpi_battery *battery = &sbs->battery[id];
+
+       if (battery->bat.dev) {
+               if (battery->have_sysfs_alarm)
+                       device_remove_file(battery->bat.dev, &alarm_attr);
+               power_supply_unregister(&battery->bat);
        }
+#ifdef CONFIG_ACPI_PROCFS_POWER
+       if (battery->proc_entry)
+               acpi_sbs_remove_fs(&battery->proc_entry, acpi_battery_dir);
+#endif
 }
 
 static int acpi_charger_add(struct acpi_sbs *sbs)
@@ -790,11 +844,13 @@ static int acpi_charger_add(struct acpi_sbs *sbs)
        result = acpi_ac_get_present(sbs);
        if (result)
                goto end;
+#ifdef CONFIG_ACPI_PROCFS_POWER
        result = acpi_sbs_add_fs(&sbs->charger_entry, acpi_ac_dir,
                                 ACPI_AC_DIR_NAME, NULL,
                                 &acpi_ac_state_fops, NULL, sbs);
        if (result)
                goto end;
+#endif
        sbs->charger.name = "sbs-charger";
        sbs->charger.type = POWER_SUPPLY_TYPE_MAINS;
        sbs->charger.properties = sbs_ac_props;
@@ -812,8 +868,10 @@ static void acpi_charger_remove(struct acpi_sbs *sbs)
 {
        if (sbs->charger.dev)
                power_supply_unregister(&sbs->charger);
+#ifdef CONFIG_ACPI_PROCFS_POWER
        if (sbs->charger_entry)
                acpi_sbs_remove_fs(&sbs->charger_entry, acpi_ac_dir);
+#endif
 }
 
 void acpi_sbs_callback(void *context)
@@ -916,6 +974,7 @@ static int acpi_sbs_remove(struct acpi_device *device, int type)
 
 static void acpi_sbs_rmdirs(void)
 {
+#ifdef CONFIG_ACPI_PROCFS_POWER
        if (acpi_ac_dir) {
                acpi_unlock_ac_dir(acpi_ac_dir);
                acpi_ac_dir = NULL;
@@ -924,6 +983,7 @@ static void acpi_sbs_rmdirs(void)
                acpi_unlock_battery_dir(acpi_battery_dir);
                acpi_battery_dir = NULL;
        }
+#endif
 }
 
 static int acpi_sbs_resume(struct acpi_device *device)
@@ -953,6 +1013,7 @@ static int __init acpi_sbs_init(void)
 
        if (acpi_disabled)
                return -ENODEV;
+#ifdef CONFIG_ACPI_PROCFS_POWER
        acpi_ac_dir = acpi_lock_ac_dir();
        if (!acpi_ac_dir)
                return -ENODEV;
@@ -961,6 +1022,7 @@ static int __init acpi_sbs_init(void)
                acpi_sbs_rmdirs();
                return -ENODEV;
        }
+#endif
        result = acpi_bus_register_driver(&acpi_sbs_driver);
        if (result < 0) {
                acpi_sbs_rmdirs();