ACPI: thinkpad-acpi: cleanup thermal subdriver for sysfs conversion
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>
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c9bea99c1a
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04cc862c18
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@ -1818,13 +1818,13 @@ static int __init thermal_init(struct ibm_init_struct *iibm)
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ta1 = ta2 = 0;
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for (i = 0; i < 8; i++) {
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if (likely(acpi_ec_read(0x78 + i, &t))) {
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if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) {
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ta1 |= t;
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} else {
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ta1 = 0;
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break;
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}
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if (likely(acpi_ec_read(0xC0 + i, &t))) {
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if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) {
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ta2 |= t;
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} else {
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ta1 = 0;
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@ -1869,57 +1869,84 @@ static int __init thermal_init(struct ibm_init_struct *iibm)
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return (thermal_read_mode != TPACPI_THERMAL_NONE)? 0 : 1;
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}
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static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
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/* idx is zero-based */
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static int thermal_get_sensor(int idx, s32 *value)
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{
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int i, t;
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int t;
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s8 tmp;
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char tmpi[] = "TMPi";
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char tmpi[5];
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if (!s)
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return -EINVAL;
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t = TP_EC_THERMAL_TMP0;
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switch (thermal_read_mode) {
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#if TPACPI_MAX_THERMAL_SENSORS >= 16
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case TPACPI_THERMAL_TPEC_16:
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for (i = 0; i < 8; i++) {
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if (!acpi_ec_read(0xC0 + i, &tmp))
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return -EIO;
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s->temp[i + 8] = tmp * 1000;
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if (idx >= 8 && idx <= 15) {
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t = TP_EC_THERMAL_TMP8;
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idx -= 8;
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}
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/* fallthrough */
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#endif
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case TPACPI_THERMAL_TPEC_8:
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for (i = 0; i < 8; i++) {
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if (!acpi_ec_read(0x78 + i, &tmp))
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if (idx <= 7) {
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if (!acpi_ec_read(t + idx, &tmp))
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return -EIO;
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s->temp[i] = tmp * 1000;
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*value = tmp * 1000;
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return 0;
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}
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return (thermal_read_mode == TPACPI_THERMAL_TPEC_16) ? 16 : 8;
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break;
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case TPACPI_THERMAL_ACPI_UPDT:
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if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
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return -EIO;
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for (i = 0; i < 8; i++) {
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tmpi[3] = '0' + i;
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if (idx <= 7) {
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snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
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if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
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return -EIO;
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if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
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return -EIO;
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s->temp[i] = (t - 2732) * 100;
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*value = (t - 2732) * 100;
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return 0;
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}
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return 8;
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break;
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case TPACPI_THERMAL_ACPI_TMP07:
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for (i = 0; i < 8; i++) {
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tmpi[3] = '0' + i;
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if (idx <= 7) {
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snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
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if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
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return -EIO;
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s->temp[i] = t * 1000;
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*value = t * 1000;
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return 0;
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}
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return 8;
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break;
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case TPACPI_THERMAL_NONE:
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default:
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return 0;
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return -ENOSYS;
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}
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return -EINVAL;
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}
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static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
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{
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int res, i;
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int n;
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n = 8;
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i = 0;
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if (!s)
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return -EINVAL;
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if (thermal_read_mode == TPACPI_THERMAL_TPEC_16)
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n = 16;
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for(i = 0 ; i < n; i++) {
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res = thermal_get_sensor(i, &s->temp[i]);
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if (res)
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return res;
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}
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return n;
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}
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static int thermal_read(char *p)
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@ -427,12 +427,20 @@ enum thermal_access_mode {
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TPACPI_THERMAL_TPEC_16, /* Use ACPI EC regs, 16 sensors */
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};
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enum { /* TPACPI_THERMAL_TPEC_* */
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TP_EC_THERMAL_TMP0 = 0x78, /* ACPI EC regs TMP 0..7 */
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TP_EC_THERMAL_TMP8 = 0xC0, /* ACPI EC regs TMP 8..15 */
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};
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#define TPACPI_MAX_THERMAL_SENSORS 16 /* Max thermal sensors supported */
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struct ibm_thermal_sensors_struct {
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s32 temp[TPACPI_MAX_THERMAL_SENSORS];
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};
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static enum thermal_access_mode thermal_read_mode;
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static int thermal_init(struct ibm_init_struct *iibm);
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static int thermal_get_sensor(int idx, s32 *value);
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static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s);
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static int thermal_read(char *p);
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