linux-kernel - [PATCH v2] hwmon: (pmbus/mp2975) Fix PGOOD in READ_STATUS

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Date:   Mon, 31 Jul 2023 11:22:04 +0200
From:   Naresh Solanki <naresh.solanki@...ements.com>
To:     Guenter Roeck <linux@...ck-us.net>,
        Jean Delvare <jdelvare@...e.com>
Cc:     vadimp@...dia.com, Patrick Rudolph <patrick.rudolph@...ements.com>,
        Naresh Solanki <Naresh.Solanki@...ements.com>,
        linux-hwmon@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH v2] hwmon: (pmbus/mp2975) Fix PGOOD in READ_STATUS_WORD

From: Patrick Rudolph <patrick.rudolph@...ements.com>

MP2973 & MP2971 returns PGOOD instead of PB_STATUS_POWER_GOOD_N.
Fix that in the read_word_data hook.
MP2975 might be affected but needs verification.

Signed-off-by: Patrick Rudolph <patrick.rudolph@...ements.com>
Signed-off-by: Naresh Solanki <Naresh.Solanki@...ements.com>
---
 drivers/hwmon/pmbus/mp2975.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/hwmon/pmbus/mp2975.c b/drivers/hwmon/pmbus/mp2975.c
index 28f33f4618fa..27bb39370662 100644
--- a/drivers/hwmon/pmbus/mp2975.c
+++ b/drivers/hwmon/pmbus/mp2975.c
@@ -297,6 +297,11 @@ static int mp2973_read_word_data(struct i2c_client *client, int page,
 	int ret;
 
 	switch (reg) {
+	case PMBUS_STATUS_WORD:
+		/* MP2973 & MP2971 returns PGOOD instead of PB_STATUS_POWER_GOOD_N. */
+		ret = pmbus_read_word_data(client, page, phase, reg);
+		ret ^= PB_STATUS_POWER_GOOD_N;
+		break;
 	case PMBUS_OT_FAULT_LIMIT:
 		ret = mp2975_read_word_helper(client, page, phase, reg,
 					      GENMASK(7, 0));

base-commit: cb7022b8976e3c4d12cea2e7bb820a2944e2fd7b
-- 
2.41.0