diff options
| author | Henrique de Moraes Holschuh <hmh@hmh.eng.br> | 2006-11-24 11:47:13 -0200 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2006-12-07 01:38:43 -0500 |
| commit | a12095c2b50c8a7c80517e37c00d6e6c863d43c5 (patch) | |
| tree | 61f17cfdfa283430531e1b4749e2de93b2b0a812 /drivers/acpi | |
| parent | 1c6a334e9c028c2b72c5350650cb14e6d5fdc232 (diff) | |
ACPI: ibm-acpi: fix and extend fan control functions
This patch extend fan control functions, implementing enable/disable for
all write access modes, implementing level control for all level-capable
write access modes.
The patch also updates the documentation, explaining levels auto and
disengaged.
ABI changes:
1. Support level 0 as an equivalent to disable
2. Add support for level auto and level disengaged when doing
EC 0x2f fan control
3. Support enable/disable for all level-based write access modes
4. Add support for level command on FANS thinkpads, as per
thinkwiki reports
Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Diffstat (limited to 'drivers/acpi')
| -rw-r--r-- | drivers/acpi/ibm_acpi.c | 39 |
1 files changed, 34 insertions, 5 deletions
diff --git a/drivers/acpi/ibm_acpi.c b/drivers/acpi/ibm_acpi.c index ecb5ece79a3..4001ad193dd 100644 --- a/drivers/acpi/ibm_acpi.c +++ b/drivers/acpi/ibm_acpi.c @@ -1833,10 +1833,13 @@ static int fan_init(void) IBMACPI_FAN_WR_ACPI_FANS; fan_control_commands |= IBMACPI_FAN_CMD_SPEED | + IBMACPI_FAN_CMD_LEVEL | IBMACPI_FAN_CMD_ENABLE; } else { fan_control_access_mode = IBMACPI_FAN_WR_TPEC; - fan_control_commands |= IBMACPI_FAN_CMD_ENABLE; + fan_control_commands |= + IBMACPI_FAN_CMD_LEVEL | + IBMACPI_FAN_CMD_ENABLE; } } } @@ -1948,9 +1951,20 @@ static int fan_read(char *p) len += sprintf(p + len, "status:\t\tnot supported\n"); } - if (fan_control_commands & IBMACPI_FAN_CMD_LEVEL) - len += sprintf(p + len, "commands:\tlevel <level>" - " (<level> is 0-7)\n"); + if (fan_control_commands & IBMACPI_FAN_CMD_LEVEL) { + len += sprintf(p + len, "commands:\tlevel <level>"); + + switch (fan_control_access_mode) { + case IBMACPI_FAN_WR_ACPI_SFAN: + len += sprintf(p + len, " (<level> is 0-7)\n"); + break; + + default: + len += sprintf(p + len, " (<level> is 0-7, " + "auto, disengaged)\n"); + break; + } + } if (fan_control_commands & IBMACPI_FAN_CMD_ENABLE) len += sprintf(p + len, "commands:\tenable, disable\n"); @@ -1973,6 +1987,17 @@ static int fan_set_level(int level) return -EINVAL; break; + case IBMACPI_FAN_WR_ACPI_FANS: + case IBMACPI_FAN_WR_TPEC: + if ((level != IBMACPI_FAN_EC_AUTO) && + (level != IBMACPI_FAN_EC_DISENGAGED) && + ((level < 0) || (level > 7))) + return -EINVAL; + + if (!acpi_ec_write(fan_status_offset, level)) + return -EIO; + break; + default: return -ENXIO; } @@ -2060,7 +2085,11 @@ static int fan_write_cmd_level(const char *cmd, int *rc) { int level; - if (sscanf(cmd, "level %d", &level) != 1) + if (strlencmp(cmd, "level auto") == 0) + level = IBMACPI_FAN_EC_AUTO; + else if (strlencmp(cmd, "level disengaged") == 0) + level = IBMACPI_FAN_EC_DISENGAGED; + else if (sscanf(cmd, "level %d", &level) != 1) return 0; if ((*rc = fan_set_level(level)) == -ENXIO) |