diff options
| -rw-r--r-- | Documentation/admin-guide/kernel-parameters.txt | 7 | ||||
| -rw-r--r-- | drivers/regulator/core.c | 17 |
2 files changed, 24 insertions, 0 deletions
diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt index 65731b060e3f..825159394da2 100644 --- a/Documentation/admin-guide/kernel-parameters.txt +++ b/Documentation/admin-guide/kernel-parameters.txt @@ -5544,6 +5544,13 @@ print every Nth verbose statement, where N is the value specified. + regulator_ignore_unused + [REGULATOR] + Prevents regulator framework from disabling regulators + that are unused, due no driver claiming them. This may + be useful for debug and development, but should not be + needed on a platform with proper driver support. + relax_domain_level= [KNL, SMP] Set scheduler's default relax_domain_level. See Documentation/admin-guide/cgroup-v1/cpusets.rst. diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c index 3137e40fcd3e..79777495cc3a 100644 --- a/drivers/regulator/core.c +++ b/drivers/regulator/core.c @@ -6234,6 +6234,14 @@ unlock: return 0; } +static bool regulator_ignore_unused; +static int __init regulator_ignore_unused_setup(char *__unused) +{ + regulator_ignore_unused = true; + return 1; +} +__setup("regulator_ignore_unused", regulator_ignore_unused_setup); + static void regulator_init_complete_work_function(struct work_struct *work) { /* @@ -6246,6 +6254,15 @@ static void regulator_init_complete_work_function(struct work_struct *work) class_for_each_device(®ulator_class, NULL, NULL, regulator_register_resolve_supply); + /* + * For debugging purposes, it may be useful to prevent unused + * regulators from being disabled. + */ + if (regulator_ignore_unused) { + pr_warn("regulator: Not disabling unused regulators\n"); + return; + } + /* If we have a full configuration then disable any regulators * we have permission to change the status for and which are * not in use or always_on. This is effectively the default |