kernel/linux.git/drivers/regulator/fp9931.c, branch linux-7.1.y

regulator: fp9931: Fix handling of mandatory "vin" supply

2026-03-17T18:07:36+00:00

The FP9931 requires a mandatory "vin" power supply to operate. Replace devm_regulator_get_optional() with devm_regulator_get() to enforce this mandatory dependency. Fixes: 12d821bd13d42 ("regulator: Add FP9931/JD9930 driver") Signed-off-by: Robby Cai Link: https://patch.msgid.link/20260313133102.2749890-3-robby.cai@nxp.com Signed-off-by: Mark Brown

regulator: fp9931: Fix PM runtime reference leak in fp9931_hwmon_read()

2026-02-24T17:31:54+00:00

In fp9931_hwmon_read(), if regmap_read() failed, the function returned the error code without calling pm_runtime_put_autosuspend(), causing a PM reference leak. Fixes: 12d821bd13d4 ("regulator: Add FP9931/JD9930 driver") Signed-off-by: Felix Gu Reviewed-by: Andreas Kemnade Link: https://patch.msgid.link/20260224-fp9931-v1-1-1cf05cabef4a@gmail.com Signed-off-by: Mark Brown

regulator: fp9931: Add missing memory allocation check

2026-01-19T14:42:02+00:00

Add a check for devm_kzalloc failure in fp9931_probe to prevent a null pointer dereference. Fixes: 12d821bd13d4 ("regulator: Add FP9931/JD9930 driver") Signed-off-by: Felix Gu Link: https://patch.msgid.link/tencent_5FCF2108621C51007E5526A7C60A5CC1F306@qq.com Signed-off-by: Mark Brown

regulator: fp9931: fix regulator node pointer

2025-12-24T11:31:29+00:00

Sync the driver with the binding. During review process a regulators subnode was requested but neither driver nor test setup was updated. Fixes: 12d821bd13d4 ("regulator: Add FP9931/JD9930 driver") Signed-off-by: Andreas Kemnade Link: https://patch.msgid.link/20251223-fp9931-fix-v1-1-b19b4c1e7056@kemnade.info Signed-off-by: Mark Brown

regulator: fp9931: Fix spelling mistake "failid" -> "failed"

2025-11-28T18:07:46+00:00

There is a spelling mistake in a dev_err_probe message. Fix it. Signed-off-by: Colin Ian King Link: https://patch.msgid.link/20251128173330.318309-1-colin.i.king@gmail.com Signed-off-by: Mark Brown

regulator: Add FP9931/JD9930 driver

2025-11-20T16:29:17+00:00

Add a driver for the FP9931/JD9930 regulator. Implement handling of the PG (power good), TS_EN (temperature sensor enable), and EN (enable regulators) pins. Implement the pair of symmetric LDOs as a single regulator because they share a single voltage set register. For simplicity, just add the temperature sensor (depending on external NTC) directly. Limitations: - As these regulators are controlled together with the VCOM regulator via the EN pin, some kind of management must be in place. As the enable op is not called when the regulator is already enabled, simple refcounting seems not to work to avoid clearing EN when one regulator is still enabled. As these regulators are typically used together, this limitation should not hurt hard, just provide the is_enabled op. - As the VCOM step is quite odd (5V/255 steps), rounding is needed. Due to some limitations in the regulator core, the max/min voltages in the devicetree must match the idea of the driver how to round things exactly. - Night mode is not implemented, so only the FP9931 compatible is needed in the driver, there is no REGULATOR_MODE_NIGHT and no clear definition in the datasheet what it does, also the XON pin which seems to be an input related to that night mode is not used. Signed-off-by: Andreas Kemnade Link: https://patch.msgid.link/20251115-fp9931-submit-v3-3-92f5d0772b68@kemnade.info Signed-off-by: Mark Brown