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ACPI: thinkpad-acpi: cleanup thermal subdriver for sysfs conversion

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Clean-up the thermal subdriver for sysfs conversion.  Make thermal_get_*
reentrancy-safe while at it, and add the missing thermal_read_mode variable
to the header file.

Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
Henrique de Moraes Holschuh 2007-04-21 11:08:43 -03:00 committed by Len Brown
parent c9bea99c1a
commit 04cc862c18
2 changed files with 61 additions and 26 deletions
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79
drivers/misc/thinkpad_acpi.c
View file

@ -1818,13 +1818,13 @@ static int __init thermal_init(struct ibm_init_struct *iibm)
ta1 = ta2 = 0;
for (i = 0; i < 8; i++) {
if (likely(acpi_ec_read(0x78 + i, &t))) {
if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) {
ta1 |= t;
} else {
ta1 = 0;
break;
}
if (likely(acpi_ec_read(0xC0 + i, &t))) {
if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) {
ta2 |= t;
} else {
ta1 = 0;
@ -1869,57 +1869,84 @@ static int __init thermal_init(struct ibm_init_struct *iibm)
return (thermal_read_mode != TPACPI_THERMAL_NONE)? 0 : 1;
}
static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
/* idx is zero-based */
static int thermal_get_sensor(int idx, s32 *value)
{
int i, t;
int t;
s8 tmp;
char tmpi[] = "TMPi";
char tmpi[5];
if (!s)
return -EINVAL;
t = TP_EC_THERMAL_TMP0;
switch (thermal_read_mode) {
#if TPACPI_MAX_THERMAL_SENSORS >= 16
case TPACPI_THERMAL_TPEC_16:
for (i = 0; i < 8; i++) {
if (!acpi_ec_read(0xC0 + i, &tmp))
return -EIO;
s->temp[i + 8] = tmp * 1000;
if (idx >= 8 && idx <= 15) {
t = TP_EC_THERMAL_TMP8;
idx -= 8;
}
/* fallthrough */
#endif
case TPACPI_THERMAL_TPEC_8:
for (i = 0; i < 8; i++) {
if (!acpi_ec_read(0x78 + i, &tmp))
if (idx <= 7) {
if (!acpi_ec_read(t + idx, &tmp))
return -EIO;
s->temp[i] = tmp * 1000;
*value = tmp * 1000;
return 0;
}
return (thermal_read_mode == TPACPI_THERMAL_TPEC_16) ? 16 : 8;
break;
case TPACPI_THERMAL_ACPI_UPDT:
if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
return -EIO;
for (i = 0; i < 8; i++) {
tmpi[3] = '0' + i;
if (idx <= 7) {
snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
return -EIO;
if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
return -EIO;
s->temp[i] = (t - 2732) * 100;
*value = (t - 2732) * 100;
return 0;
}
return 8;
break;
case TPACPI_THERMAL_ACPI_TMP07:
for (i = 0; i < 8; i++) {
tmpi[3] = '0' + i;
if (idx <= 7) {
snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
return -EIO;
s->temp[i] = t * 1000;
*value = t * 1000;
return 0;
}
return 8;
break;
case TPACPI_THERMAL_NONE:
default:
return 0;
return -ENOSYS;
}
return -EINVAL;
}
static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
{
int res, i;
int n;
n = 8;
i = 0;
if (!s)
return -EINVAL;
if (thermal_read_mode == TPACPI_THERMAL_TPEC_16)
n = 16;
for(i = 0 ; i < n; i++) {
res = thermal_get_sensor(i, &s->temp[i]);
if (res)
return res;
}
return n;
}
static int thermal_read(char *p)

8
drivers/misc/thinkpad_acpi.h
View file

@ -427,12 +427,20 @@ enum thermal_access_mode {
TPACPI_THERMAL_TPEC_16, /* Use ACPI EC regs, 16 sensors */
};
enum { /* TPACPI_THERMAL_TPEC_* */
TP_EC_THERMAL_TMP0 = 0x78, /* ACPI EC regs TMP 0..7 */
TP_EC_THERMAL_TMP8 = 0xC0, /* ACPI EC regs TMP 8..15 */
};
#define TPACPI_MAX_THERMAL_SENSORS 16 /* Max thermal sensors supported */
struct ibm_thermal_sensors_struct {
s32 temp[TPACPI_MAX_THERMAL_SENSORS];
};
static enum thermal_access_mode thermal_read_mode;
static int thermal_init(struct ibm_init_struct *iibm);
static int thermal_get_sensor(int idx, s32 *value);
static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s);
static int thermal_read(char *p);