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| author | Andres Salomon <dilinger@collabora.co.uk> | 2009-06-30 08:15:26 +0200 |
|---|---|---|
| committer | Anton Vorontsov <cbouatmailru@gmail.com> | 2009-07-01 00:48:37 +0200 |
| commit | 144bbeaedc53290eab21da82ce1cb5faefd14374 (patch) | |
| tree | bbcbe31427ae566955323a3f988bb0f8569c49ff /drivers | |
| parent | Revert "power: remove POWER_SUPPLY_PROP_CAPACITY_LEVEL" (diff) | |
| download | linux-144bbeaedc53290eab21da82ce1cb5faefd14374.tar.xz linux-144bbeaedc53290eab21da82ce1cb5faefd14374.zip | |
olpc_battery: Add an 'error' sysfs device that displays raw errors
Grab the error code from EC_BAT_ERRCODE and let the user see it (rather
than attempting to decode it as we do with PROP_HEALTH) with a separate
error sysfs file.
Signed-off-by: Andres Salomon <dilinger@collabora.co.uk>
Signed-off-by: Anton Vorontsov <cbouatmailru@gmail.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/power/olpc_battery.c | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/drivers/power/olpc_battery.c b/drivers/power/olpc_battery.c index 3a589df09376..602bbd008f78 100644 --- a/drivers/power/olpc_battery.c +++ b/drivers/power/olpc_battery.c @@ -10,7 +10,9 @@ #include <linux/kernel.h> #include <linux/module.h> +#include <linux/types.h> #include <linux/err.h> +#include <linux/device.h> #include <linux/platform_device.h> #include <linux/power_supply.h> #include <linux/jiffies.h> @@ -379,6 +381,29 @@ static struct bin_attribute olpc_bat_eeprom = { .read = olpc_bat_eeprom_read, }; +/* Allow userspace to see the specific error value pulled from the EC */ + +static ssize_t olpc_bat_error_read(struct device *dev, + struct device_attribute *attr, char *buf) +{ + uint8_t ec_byte; + ssize_t ret; + + ret = olpc_ec_cmd(EC_BAT_ERRCODE, NULL, 0, &ec_byte, 1); + if (ret < 0) + return ret; + + return sprintf(buf, "%d\n", ec_byte); +} + +static struct device_attribute olpc_bat_error = { + .attr = { + .name = "error", + .mode = S_IRUGO, + }, + .show = olpc_bat_error_read, +}; + /********************************************************************* * Initialisation *********************************************************************/ @@ -442,8 +467,14 @@ static int __init olpc_bat_init(void) if (ret) goto eeprom_failed; + ret = device_create_file(olpc_bat.dev, &olpc_bat_error); + if (ret) + goto error_failed; + goto success; +error_failed: + device_remove_bin_file(olpc_bat.dev, &olpc_bat_eeprom); eeprom_failed: power_supply_unregister(&olpc_bat); battery_failed: @@ -456,6 +487,7 @@ success: static void __exit olpc_bat_exit(void) { + device_remove_file(olpc_bat.dev, &olpc_bat_error); device_remove_bin_file(olpc_bat.dev, &olpc_bat_eeprom); power_supply_unregister(&olpc_bat); power_supply_unregister(&olpc_ac); |