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a=cAcMbU7R10T-QSRYIcO_:22 X-Proofpoint-ORIG-GUID: 6oLUakQ_X_3cSRXllZTaRN2HAvmCwQOp X-Proofpoint-GUID: 6oLUakQ_X_3cSRXllZTaRN2HAvmCwQOp X-HPE-SCL: -1 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.51,FMLib:17.12.100.49 definitions=2026-03-20_04,2026-03-20_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 lowpriorityscore=0 bulkscore=0 adultscore=0 malwarescore=0 suspectscore=0 phishscore=0 clxscore=1015 impostorscore=0 priorityscore=1501 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2603050001 definitions=main-2603210005 Content-Type: text/plain; charset="utf-8" From: Sanman Pradhan Export pmbus_wait() and pmbus_update_ts() so that PMBus device drivers which perform raw I2C transfers outside the core helpers can keep the PMBus core delay bookkeeping in sync. Move PMBUS_OP_WRITE and PMBUS_OP_PAGE_CHANGE from pmbus_core.c to pmbus.h so device drivers can pass the correct operation type flags to pmbus_update_ts(). This is needed by the max31785 driver, which performs raw i2c_transfer() calls for its 4-byte extended fan speed reads that cannot use the standard PMBus word read path. Signed-off-by: Sanman Pradhan --- v5: - Removed spinlock usage; pmbus_wait() and pmbus_update_ts() now rely solely on update_lock serialization. v4: - No changes to logic; standardized on the Juniper email address to resolve the From/SOB mismatch. v3: - No changes to this patch in this version. v2: - New patch in the series. - Export pmbus_wait() and pmbus_update_ts() to the PMBUS namespace. - Relocate PMBUS_OP_* bitmasks to the subsystem header. --- drivers/hwmon/pmbus/pmbus.h | 6 ++++++ drivers/hwmon/pmbus/pmbus_core.c | 9 +++++---- 2 files changed, 11 insertions(+), 4 deletions(-) diff --git a/drivers/hwmon/pmbus/pmbus.h b/drivers/hwmon/pmbus/pmbus.h index 3ddcb742d289e..deb556971a726 100644 --- a/drivers/hwmon/pmbus/pmbus.h +++ b/drivers/hwmon/pmbus/pmbus.h @@ -424,6 +424,10 @@ enum vrm_version { vr11 =3D 0, vr12, vr13, imvp9, amd6= 25mv, nvidia195mv }; #define PMBUS_REV_12 0x22 /* PMBus revision 1.2 */ #define PMBUS_REV_13 0x33 /* PMBus revision 1.3 */ =20 +/* Operation type flags for pmbus_update_ts */ +#define PMBUS_OP_WRITE BIT(0) +#define PMBUS_OP_PAGE_CHANGE BIT(1) + struct pmbus_driver_info { int pages; /* Total number of pages */ u8 phases[PMBUS_PAGES]; /* Number of phases per page */ @@ -541,6 +545,8 @@ int pmbus_regulator_init_cb(struct regulator_dev *rdev, =20 void pmbus_clear_cache(struct i2c_client *client); void pmbus_set_update(struct i2c_client *client, u8 reg, bool update); +void pmbus_wait(struct i2c_client *client); +void pmbus_update_ts(struct i2c_client *client, int op); int pmbus_set_page(struct i2c_client *client, int page, int phase); int pmbus_read_word_data(struct i2c_client *client, int page, int phase, u8 reg); diff --git a/drivers/hwmon/pmbus/pmbus_core.c b/drivers/hwmon/pmbus/pmbus_c= ore.c index 3dad455448d05..9db5a53fd97c8 100644 --- a/drivers/hwmon/pmbus/pmbus_core.c +++ b/drivers/hwmon/pmbus/pmbus_core.c @@ -36,8 +36,7 @@ * The type of operation used for picking the delay between * successive pmbus operations. */ -#define PMBUS_OP_WRITE BIT(0) -#define PMBUS_OP_PAGE_CHANGE BIT(1) +/* PMBUS_OP_WRITE and PMBUS_OP_PAGE_CHANGE are defined in pmbus.h */ =20 static int wp =3D -1; module_param(wp, int, 0444); @@ -173,7 +172,7 @@ void pmbus_set_update(struct i2c_client *client, u8 reg= , bool update) EXPORT_SYMBOL_NS_GPL(pmbus_set_update, "PMBUS"); =20 /* Some chips need a delay between accesses. */ -static void pmbus_wait(struct i2c_client *client) +void pmbus_wait(struct i2c_client *client) { struct pmbus_data *data =3D i2c_get_clientdata(client); s64 delay =3D ktime_us_delta(data->next_access_backoff, ktime_get()); @@ -181,9 +180,10 @@ static void pmbus_wait(struct i2c_client *client) if (delay > 0) fsleep(delay); } +EXPORT_SYMBOL_NS_GPL(pmbus_wait, "PMBUS"); =20 /* Sets the last operation timestamp for pmbus_wait */ -static void pmbus_update_ts(struct i2c_client *client, int op) +void pmbus_update_ts(struct i2c_client *client, int op) { struct pmbus_data *data =3D i2c_get_clientdata(client); const struct pmbus_driver_info *info =3D data->info; @@ -197,6 +197,7 @@ static void pmbus_update_ts(struct i2c_client *client, = int op) if (delay > 0) data->next_access_backoff =3D ktime_add_us(ktime_get(), delay); } +EXPORT_SYMBOL_NS_GPL(pmbus_update_ts, "PMBUS"); =20 int pmbus_set_page(struct i2c_client *client, int page, int phase) { --=20 2.34.1