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authorGuenter Roeck <guenter.roeck@ericsson.com>2011-03-05 07:55:10 -0800
committerGuenter Roeck <guenter.roeck@ericsson.com>2011-03-14 22:39:09 -0700
commit954df6763cd84551a565a0c341d3401cf30b9d2d (patch)
treec52ecb7b6255c8c1c06993d5d7dc6414da581e75 /drivers/hwmon
parent83274c68a34094bbb465589e61f91a3714f8d026 (diff)
downloadlinux-954df6763cd84551a565a0c341d3401cf30b9d2d.tar.bz2
hwmon: (pmbus) Improve support for paged fans
So far, it seemed like fans would either all be in page 0, or that there would be one page per fan. Turns out this was a wrong assumption. There is at least one PMBus fan controller which supports three pages with four fans each. Update code to handle this situation. Reported-by: Greg Schnorr <gschnorr@cisco.com> Tested-by: Greg Schnorr <gschnorr@cisco.com> Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com> Acked-by: Greg Schnorr <gschnorr@cisco.com>
Diffstat (limited to 'drivers/hwmon')
-rw-r--r--drivers/hwmon/pmbus_core.c70
1 files changed, 40 insertions, 30 deletions
diff --git a/drivers/hwmon/pmbus_core.c b/drivers/hwmon/pmbus_core.c
index b7c64ba31f4c..d025a118bf92 100644
--- a/drivers/hwmon/pmbus_core.c
+++ b/drivers/hwmon/pmbus_core.c
@@ -58,12 +58,10 @@
#define PMBUS_MAX_INPUT_LABELS 4 /* vin, vcap, iin, pin */
/*
- * status, status_vout, status_iout, status_fans, and status_temp
- * are paged. status_input and status_fan34 are unpaged.
- * status_fan34 is a special case to handle a second set of fans
- * on page 0.
+ * status, status_vout, status_iout, status_fans, status_fan34, and status_temp
+ * are paged. status_input is unpaged.
*/
-#define PB_NUM_STATUS_REG (PMBUS_PAGES * 5 + 2)
+#define PB_NUM_STATUS_REG (PMBUS_PAGES * 6 + 1)
/*
* Index into status register array, per status register group
@@ -73,7 +71,7 @@
#define PB_STATUS_IOUT_BASE (PB_STATUS_VOUT_BASE + PMBUS_PAGES)
#define PB_STATUS_FAN_BASE (PB_STATUS_IOUT_BASE + PMBUS_PAGES)
#define PB_STATUS_FAN34_BASE (PB_STATUS_FAN_BASE + PMBUS_PAGES)
-#define PB_STATUS_INPUT_BASE (PB_STATUS_FAN34_BASE + 1)
+#define PB_STATUS_INPUT_BASE (PB_STATUS_FAN34_BASE + PMBUS_PAGES)
#define PB_STATUS_TEMP_BASE (PB_STATUS_INPUT_BASE + 1)
struct pmbus_sensor {
@@ -327,14 +325,17 @@ static struct pmbus_data *pmbus_update_device(struct device *dev)
= pmbus_get_status(client, i, PMBUS_STATUS_FAN_12);
}
+ for (i = 0; i < info->pages; i++) {
+ if (!(info->func[i] & PMBUS_HAVE_STATUS_FAN34))
+ continue;
+ data->status[PB_STATUS_FAN34_BASE + i]
+ = pmbus_get_status(client, i, PMBUS_STATUS_FAN_34);
+ }
+
if (info->func[0] & PMBUS_HAVE_STATUS_INPUT)
data->status[PB_STATUS_INPUT_BASE]
= pmbus_get_status(client, 0, PMBUS_STATUS_INPUT);
- if (info->func[0] & PMBUS_HAVE_STATUS_FAN34)
- data->status[PB_STATUS_FAN34_BASE]
- = pmbus_get_status(client, 0, PMBUS_STATUS_FAN_34);
-
for (i = 0; i < data->num_sensors; i++) {
struct pmbus_sensor *sensor = &data->sensors[i];
@@ -817,6 +818,20 @@ static const int pmbus_fan_status_registers[] = {
PMBUS_STATUS_FAN_34
};
+static const u32 pmbus_fan_flags[] = {
+ PMBUS_HAVE_FAN12,
+ PMBUS_HAVE_FAN12,
+ PMBUS_HAVE_FAN34,
+ PMBUS_HAVE_FAN34
+};
+
+static const u32 pmbus_fan_status_flags[] = {
+ PMBUS_HAVE_STATUS_FAN12,
+ PMBUS_HAVE_STATUS_FAN12,
+ PMBUS_HAVE_STATUS_FAN34,
+ PMBUS_HAVE_STATUS_FAN34
+};
+
/*
* Determine maximum number of sensors, booleans, and labels.
* To keep things simple, only make a rough high estimate.
@@ -848,17 +863,12 @@ static void pmbus_find_max_attr(struct i2c_client *client,
max_labels++;
}
if (info->func[page] & PMBUS_HAVE_FAN12) {
- if (page == 0) {
- max_sensors +=
- ARRAY_SIZE(pmbus_fan_registers) *
- PMBUS_MAX_SENSORS_PER_FAN;
- max_booleans +=
- ARRAY_SIZE(pmbus_fan_registers) *
- PMBUS_MAX_BOOLEANS_PER_FAN;
- } else {
- max_sensors += PMBUS_MAX_SENSORS_PER_FAN;
- max_booleans += PMBUS_MAX_BOOLEANS_PER_FAN;
- }
+ max_sensors += 2 * PMBUS_MAX_SENSORS_PER_FAN;
+ max_booleans += 2 * PMBUS_MAX_BOOLEANS_PER_FAN;
+ }
+ if (info->func[page] & PMBUS_HAVE_FAN34) {
+ max_sensors += 2 * PMBUS_MAX_SENSORS_PER_FAN;
+ max_booleans += 2 * PMBUS_MAX_BOOLEANS_PER_FAN;
}
if (info->func[page] & PMBUS_HAVE_TEMP) {
if (page == 0) {
@@ -1365,15 +1375,14 @@ static void pmbus_find_attributes(struct i2c_client *client,
*/
in_index = 1;
for (page = 0; page < info->pages; page++) {
- int fans, f;
+ int f;
- if (!(info->func[page] & PMBUS_HAVE_FAN12))
- continue;
-
- fans = page ? 1 : ARRAY_SIZE(pmbus_fan_registers);
- for (f = 0; f < fans; f++) {
+ for (f = 0; f < ARRAY_SIZE(pmbus_fan_registers); f++) {
int regval;
+ if (!(info->func[page] & pmbus_fan_flags[f]))
+ break;
+
if (!pmbus_check_word_register(client, page,
pmbus_fan_registers[f])
|| !pmbus_check_byte_register(client, page,
@@ -1399,12 +1408,13 @@ static void pmbus_find_attributes(struct i2c_client *client,
* Each fan status register covers multiple fans,
* so we have to do some magic.
*/
- if (pmbus_check_byte_register
- (client, page, pmbus_fan_status_registers[f])) {
+ if ((info->func[page] & pmbus_fan_status_flags[f]) &&
+ pmbus_check_byte_register(client,
+ page, pmbus_fan_status_registers[f])) {
int base;
if (f > 1) /* fan 3, 4 */
- base = PB_STATUS_FAN34_BASE;
+ base = PB_STATUS_FAN34_BASE + page;
else
base = PB_STATUS_FAN_BASE + page;
pmbus_add_boolean_reg(data, "fan", "alarm",