kernel/linux.git/drivers/regulator/vctrl-regulator.c, branch v5.6.17

regulator: vctrl-regulator: Avoid deadlock getting and setting the voltage

2020-01-17T15:32:27+00:00

`cat /sys/kernel/debug/regulator/regulator_summary` ends on a deadlock when you have a voltage controlled regulator (vctrl). The problem is that the vctrl_get_voltage() and vctrl_set_voltage() calls the regulator_get_voltage() and regulator_set_voltage() and that will try to lock again the dependent regulators (the regulator supplying the control voltage). Fix the issue by exporting the unlocked version of the regulator_get_voltage() and regulator_set_voltage() API so drivers that need it, like the voltage controlled regulator driver can use it. Fixes: f8702f9e4aa7 ("regulator: core: Use ww_mutex for regulators locking") Reported-by: Douglas Anderson Signed-off-by: Enric Balletbo i Serra Link: https://lore.kernel.org/r/20200116094543.2847321-1-enric.balletbo@collabora.com Signed-off-by: Mark Brown

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 282

2019-06-05T15:36:37+00:00

Based on 1 normalized pattern(s): this software is licensed under the terms of the gnu general public license version 2 as published by the free software foundation and may be copied distributed and modified under those terms this program is distributed in the hope that it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 285 file(s). Signed-off-by: Thomas Gleixner Reviewed-by: Alexios Zavras Reviewed-by: Allison Randal Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190529141900.642774971@linutronix.de Signed-off-by: Greg Kroah-Hartman

regulator: vctrl: Remove unneeded continue statement

2019-04-01T08:17:34+00:00

Signed-off-by: Axel Lin Reviewed-by: Mukesh Ojha Reviewed-by: Matthias Kaehlcke Signed-off-by: Mark Brown

regulator: vctrl: Fix out of bounds array access for vctrl->vtable

2017-04-14T17:01:03+00:00

Current code only allocates rdesc->n_voltages entries for vctrl->vtable. Thus use rdesc->n_voltages instead of n_voltages in the for loop. While at it, also switch to use devm_kcalloc instead of devm_kmalloc_array + __GFP_ZERO flag and fix the argument order. Signed-off-by: Axel Lin Signed-off-by: Mark Brown

regulator: Add driver for voltage controlled regulators

2017-04-10T16:30:40+00:00

The output voltage of a voltage controlled regulator can be controlled through the voltage of another regulator. The current version of this driver assumes that the output voltage is a linear function of the control voltage. Signed-off-by: Matthias Kaehlcke Acked-by: Rob Herring Signed-off-by: Mark Brown