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Subject[PATCH RESEND v6 4/5] hwmon: (pmbus/core): Add regulator event support
Date
From: Patrick Rudolph <patrick.rudolph@9elements.com>

Add regulator events corresponding to regulator error in regulator flag
map.
Also capture the same in pmbus_regulator_get_flags.

Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com>
Signed-off-by: Naresh Solanki <Naresh.Solanki@9elements.com>
---
drivers/hwmon/pmbus/pmbus_core.c | 69 +++++++++++++++++++++-----------
1 file changed, 46 insertions(+), 23 deletions(-)

diff --git a/drivers/hwmon/pmbus/pmbus_core.c b/drivers/hwmon/pmbus/pmbus_core.c
index afd98e639b4f..22176f266891 100644
--- a/drivers/hwmon/pmbus/pmbus_core.c
+++ b/drivers/hwmon/pmbus/pmbus_core.c
@@ -2739,9 +2739,9 @@ static int pmbus_regulator_disable(struct regulator_dev *rdev)
return _pmbus_regulator_on_off(rdev, 0);
}

-/* A PMBus status flag and the corresponding REGULATOR_ERROR_* flag */
+/* A PMBus status flag and the corresponding REGULATOR_ERROR_* and REGULATOR_EVENTS_* flag */
struct pmbus_regulator_status_assoc {
- int pflag, rflag;
+ int pflag, rflag, eflag;
};

/* PMBus->regulator bit mappings for a PMBus status register */
@@ -2756,27 +2756,36 @@ static const struct pmbus_regulator_status_category pmbus_regulator_flag_map[] =
.func = PMBUS_HAVE_STATUS_VOUT,
.reg = PMBUS_STATUS_VOUT,
.bits = (const struct pmbus_regulator_status_assoc[]) {
- { PB_VOLTAGE_UV_WARNING, REGULATOR_ERROR_UNDER_VOLTAGE_WARN },
- { PB_VOLTAGE_UV_FAULT, REGULATOR_ERROR_UNDER_VOLTAGE },
- { PB_VOLTAGE_OV_WARNING, REGULATOR_ERROR_OVER_VOLTAGE_WARN },
- { PB_VOLTAGE_OV_FAULT, REGULATOR_ERROR_REGULATION_OUT },
+ { PB_VOLTAGE_UV_WARNING, REGULATOR_ERROR_UNDER_VOLTAGE_WARN,
+ REGULATOR_EVENT_UNDER_VOLTAGE_WARN },
+ { PB_VOLTAGE_UV_FAULT, REGULATOR_ERROR_UNDER_VOLTAGE,
+ REGULATOR_EVENT_UNDER_VOLTAGE },
+ { PB_VOLTAGE_OV_WARNING, REGULATOR_ERROR_OVER_VOLTAGE_WARN,
+ REGULATOR_EVENT_OVER_VOLTAGE_WARN },
+ { PB_VOLTAGE_OV_FAULT, REGULATOR_ERROR_REGULATION_OUT,
+ REGULATOR_EVENT_OVER_VOLTAGE_WARN },
{ },
},
}, {
.func = PMBUS_HAVE_STATUS_IOUT,
.reg = PMBUS_STATUS_IOUT,
.bits = (const struct pmbus_regulator_status_assoc[]) {
- { PB_IOUT_OC_WARNING, REGULATOR_ERROR_OVER_CURRENT_WARN },
- { PB_IOUT_OC_FAULT, REGULATOR_ERROR_OVER_CURRENT },
- { PB_IOUT_OC_LV_FAULT, REGULATOR_ERROR_OVER_CURRENT },
+ { PB_IOUT_OC_WARNING, REGULATOR_ERROR_OVER_CURRENT_WARN,
+ REGULATOR_EVENT_OVER_CURRENT_WARN },
+ { PB_IOUT_OC_FAULT, REGULATOR_ERROR_OVER_CURRENT,
+ REGULATOR_EVENT_OVER_CURRENT },
+ { PB_IOUT_OC_LV_FAULT, REGULATOR_ERROR_OVER_CURRENT,
+ REGULATOR_EVENT_OVER_CURRENT },
{ },
},
}, {
.func = PMBUS_HAVE_STATUS_TEMP,
.reg = PMBUS_STATUS_TEMPERATURE,
.bits = (const struct pmbus_regulator_status_assoc[]) {
- { PB_TEMP_OT_WARNING, REGULATOR_ERROR_OVER_TEMP_WARN },
- { PB_TEMP_OT_FAULT, REGULATOR_ERROR_OVER_TEMP },
+ { PB_TEMP_OT_WARNING, REGULATOR_ERROR_OVER_TEMP_WARN,
+ REGULATOR_EVENT_OVER_TEMP_WARN },
+ { PB_TEMP_OT_FAULT, REGULATOR_ERROR_OVER_TEMP,
+ REGULATOR_EVENT_OVER_TEMP },
{ },
},
},
@@ -2810,7 +2819,7 @@ static void pmbus_notify(struct pmbus_data *data, int page, int reg, int flags)
}

static int pmbus_get_flags(struct pmbus_data *data, u8 page, unsigned int *error,
- bool notify)
+ unsigned int *event, bool notify)
{
const struct pmbus_regulator_status_category *cat;
const struct pmbus_regulator_status_assoc *bit;
@@ -2819,6 +2828,7 @@ static int pmbus_get_flags(struct pmbus_data *data, u8 page, unsigned int *error
int i, status, ret;

*error = 0;
+ *event = 0;

mutex_lock(&data->update_lock);

@@ -2833,10 +2843,11 @@ static int pmbus_get_flags(struct pmbus_data *data, u8 page, unsigned int *error
goto unlock;
}

- for (bit = cat->bits; bit->pflag; bit++) {
- if (status & bit->pflag)
+ for (bit = cat->bits; bit->pflag; bit++)
+ if (status & bit->pflag) {
*error |= bit->rflag;
- }
+ *event |= bit->eflag;
+ }

if (notify && status)
pmbus_notify(data, page, cat->reg, status);
@@ -2863,20 +2874,28 @@ static int pmbus_get_flags(struct pmbus_data *data, u8 page, unsigned int *error
goto unlock;

if (ret & PB_OPERATION_CONTROL_ON) {
- if (status & PB_STATUS_OFF)
+ if (status & PB_STATUS_OFF) {
*error |= REGULATOR_ERROR_FAIL;
+ *event |= REGULATOR_EVENT_FAIL;
+ }

- if (status & PB_STATUS_POWER_GOOD_N)
+ if (status & PB_STATUS_POWER_GOOD_N) {
*error |= REGULATOR_ERROR_REGULATION_OUT;
+ *event |= REGULATOR_EVENT_REGULATION_OUT;
+ }
}
/*
* Unlike most other status bits, PB_STATUS_{IOUT_OC,VOUT_OV} are
* defined strictly as fault indicators (not warnings).
*/
- if (status & PB_STATUS_IOUT_OC)
+ if (status & PB_STATUS_IOUT_OC) {
*error |= REGULATOR_ERROR_OVER_CURRENT;
- if (status & PB_STATUS_VOUT_OV)
+ *event |= REGULATOR_EVENT_OVER_CURRENT;
+ }
+ if (status & PB_STATUS_VOUT_OV) {
*error |= REGULATOR_ERROR_REGULATION_OUT;
+ *event |= REGULATOR_EVENT_FAIL;
+ }

/*
* If we haven't discovered any thermal faults or warnings via
@@ -2884,8 +2903,10 @@ static int pmbus_get_flags(struct pmbus_data *data, u8 page, unsigned int *error
* a (conservative) best-effort interpretation.
*/
if (!(*error & (REGULATOR_ERROR_OVER_TEMP | REGULATOR_ERROR_OVER_TEMP_WARN)) &&
- (status & PB_STATUS_TEMPERATURE))
+ (status & PB_STATUS_TEMPERATURE)) {
*error |= REGULATOR_ERROR_OVER_TEMP_WARN;
+ *event |= REGULATOR_EVENT_OVER_TEMP_WARN;
+ }

unlock:
mutex_unlock(&data->update_lock);
@@ -2897,8 +2918,9 @@ static int pmbus_regulator_get_error_flags(struct regulator_dev *rdev, unsigned
struct device *dev = rdev_get_dev(rdev);
struct i2c_client *client = to_i2c_client(dev->parent);
struct pmbus_data *data = i2c_get_clientdata(client);
+ int event;

- return pmbus_get_flags(data, rdev_get_id(rdev), flags, false);
+ return pmbus_get_flags(data, rdev_get_id(rdev), flags, &event, false);
}

static int pmbus_regulator_get_status(struct regulator_dev *rdev)
@@ -3132,11 +3154,12 @@ static irqreturn_t pmbus_fault_handler(int irq, void *pdata)
{
struct pmbus_data *data = pdata;
struct i2c_client *client = to_i2c_client(data->dev);
- int i, status, ret;
+ int i, status, ret, event;

for (i = 0; i < data->info->pages; i++) {

- ret = pmbus_get_flags(data, i, &status, true);
+ ret = pmbus_get_flags(data, i, &status, &event, true);
+
if (ret)
return ret;

--
2.37.3
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