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Date: Sat, 19 Nov 2022 19:25:16 +0100
From: Naresh Solanki <naresh.solanki@...ements.com>
To: Guenter Roeck <linux@...ck-us.net>, linux-hwmon@...r.kernel.org,
Jean Delvare <jdelvare@...e.com>
Cc: broonie@...nel.org,
Patrick Rudolph <patrick.rudolph@...ements.com>,
Naresh Solanki <Naresh.Solanki@...ements.com>,
linux-kernel@...r.kernel.org
Subject: [PATCH v3] hwmon: (pmbus/core): Implement regulator get_status
From: Patrick Rudolph <patrick.rudolph@...ements.com>
Add get_status for pmbus_regulator_ops.
Changes:
- use lock throughout the function
- Avoid line continuation upto 100 column
- Optimize use of & and | operator
- Check for VOUT, IOUT, TEMPERATURE bit in status word before checking
respective status register for fault.
- Report regulator current status.
Signed-off-by: Patrick Rudolph <patrick.rudolph@...ements.com>
Signed-off-by: Naresh Solanki <Naresh.Solanki@...ements.com>
---
drivers/hwmon/pmbus/pmbus_core.c | 88 ++++++++++++++++++++++++++++++++
1 file changed, 88 insertions(+)
diff --git a/drivers/hwmon/pmbus/pmbus_core.c b/drivers/hwmon/pmbus/pmbus_core.c
index 7ec04934747e..f7a322d5b453 100644
--- a/drivers/hwmon/pmbus/pmbus_core.c
+++ b/drivers/hwmon/pmbus/pmbus_core.c
@@ -2851,6 +2851,93 @@ static int pmbus_regulator_get_error_flags(struct regulator_dev *rdev, unsigned
return 0;
}
+static int pmbus_regulator_get_status(struct regulator_dev *rdev)
+{
+ struct device *dev = rdev_get_dev(rdev);
+ struct i2c_client *client = to_i2c_client(dev->parent);
+ struct pmbus_data *data = i2c_get_clientdata(client);
+ u8 page = rdev_get_id(rdev);
+ int status, status2, ret;
+
+ mutex_lock(&data->update_lock);
+ status = pmbus_get_status(client, page, PMBUS_STATUS_WORD);
+ if (status < 0) {
+ ret = status;
+ goto unlock;
+ }
+
+ if (status & PB_STATUS_OFF) {
+ ret = REGULATOR_STATUS_OFF;
+ goto unlock;
+ }
+
+ /* If regulator is ON & reports power good then return ON */
+ if (!(status & PB_STATUS_POWER_GOOD_N)) {
+ ret = REGULATOR_STATUS_ON;
+ goto unlock;
+ }
+
+ if (status & (PB_STATUS_VIN_UV | PB_STATUS_IOUT_OC | PB_STATUS_VOUT_OV |
+ PB_STATUS_UNKNOWN)){
+ ret = REGULATOR_STATUS_ERROR;
+ goto unlock;
+ }
+
+ if (status & PB_STATUS_VOUT && data->info->func[page] & PMBUS_HAVE_STATUS_VOUT) {
+ status2 = _pmbus_read_byte_data(client, page,
+ PMBUS_STATUS_VOUT);
+ if (status2 < 0) {
+ ret = status2;
+ goto unlock;
+ }
+ if (status2 & (PB_VOLTAGE_OV_FAULT | PB_VOLTAGE_UV_FAULT)) {
+ ret = REGULATOR_STATUS_ERROR;
+ goto unlock;
+ }
+ }
+
+ if (status & PB_STATUS_IOUT_POUT && data->info->func[page] & PMBUS_HAVE_STATUS_IOUT) {
+ status2 = _pmbus_read_byte_data(client, page, PMBUS_STATUS_IOUT);
+ if (status2 < 0) {
+ ret = status2;
+ goto unlock;
+ }
+ if (status2 & (PB_POUT_OP_FAULT | PB_IOUT_UC_FAULT | PB_IOUT_OC_LV_FAULT |
+ PB_IOUT_OC_FAULT)) {
+ ret = REGULATOR_STATUS_ERROR;
+ goto unlock;
+ }
+ }
+
+ if (status & PB_STATUS_INPUT && data->info->func[page] & PMBUS_HAVE_STATUS_INPUT) {
+ status2 = _pmbus_read_byte_data(client, page, PMBUS_STATUS_INPUT);
+ if (status2 < 0) {
+ ret = status2;
+ goto unlock;
+ }
+ if (status2 & (PB_IIN_OC_FAULT | PB_VOLTAGE_OV_FAULT | PB_VOLTAGE_UV_FAULT)) {
+ ret = REGULATOR_STATUS_ERROR;
+ goto unlock;
+ }
+ }
+
+ if (status & PB_STATUS_TEMPERATURE && data->info->func[page] & PMBUS_HAVE_STATUS_TEMP) {
+ status2 = _pmbus_read_byte_data(client, page, PMBUS_STATUS_TEMPERATURE);
+ if (status2 < 0) {
+ ret = status2;
+ goto unlock;
+ }
+ if (status2 & (PB_TEMP_UT_FAULT | PB_TEMP_OT_FAULT)) {
+ ret = REGULATOR_STATUS_ERROR;
+ goto unlock;
+ }
+ }
+
+unlock:
+ mutex_unlock(&data->update_lock);
+ return ret;
+}
+
static int pmbus_regulator_get_low_margin(struct i2c_client *client, int page)
{
struct pmbus_data *data = i2c_get_clientdata(client);
@@ -2991,6 +3078,7 @@ const struct regulator_ops pmbus_regulator_ops = {
.disable = pmbus_regulator_disable,
.is_enabled = pmbus_regulator_is_enabled,
.get_error_flags = pmbus_regulator_get_error_flags,
+ .get_status = pmbus_regulator_get_status,
.get_voltage = pmbus_regulator_get_voltage,
.set_voltage = pmbus_regulator_set_voltage,
.list_voltage = pmbus_regulator_list_voltage,
base-commit: 27fea302952d8c90cafbdbee96bafeca03544401
--
2.37.3
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