Keep all regulators already enabled by bootloader on, even if no
driver has claimed them. This is useful for debug and development, but
should not be needed on a platform with proper driver support.
Signed-off-by: Tushar Behera <tushar.beh...@linaro.org>
CC: Mark Brown <broo...@kernel.org>
---
Documentation/kernel-parameters.txt | 8 ++++++++
drivers/regulator/core.c | 13 +++++++++++++
2 files changed, 21 insertions(+)
diff --git a/Documentation/kernel-parameters.txt
b/Documentation/kernel-parameters.txt
index 96bb532..20448e0 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -92,6 +92,7 @@ parameter is applicable:
PPT Parallel port support is enabled.
PS2 Appropriate PS/2 support is enabled.
RAM RAM disk support is enabled.
+ REG Regulator support is enabled.
S390 S390 architecture is enabled.
SCSI Appropriate SCSI support is enabled.
A lot of drivers have their options described inside
@@ -2886,6 +2887,13 @@ bytes respectively. Such letter suffixes can also be
entirely omitted.
reboot_cpu is s[mp]#### with #### being the
processor
to be used for rebooting.
+ reg_ignore_unused
+ [REG]
+ Keep all regulators already enabled by bootloader on,
+ even if no driver has claimed them. This is 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/cgroups/cpusets.txt.
diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index 9a09f3c..6e8305a 100644
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -3800,6 +3800,14 @@ static int __init regulator_init(void)
/* init early to allow our consumers to complete system booting */
core_initcall(regulator_init);
+static bool reg_ignore_unused;
+static int __init reg_ignore_unused_setup(char *__unused)
+{
+ reg_ignore_unused = true;
+ return 1;
+}
+__setup("reg_ignore_unused", reg_ignore_unused_setup);
+
static int __init regulator_init_complete(void)
{
struct regulator_dev *rdev;
@@ -3807,6 +3815,11 @@ static int __init regulator_init_complete(void)
struct regulation_constraints *c;
int enabled, ret;
+ if (reg_ignore_unused) {
+ pr_warn("reg: Not disabling unused regulators\n");
+ return 0;
+ }
+
/*
* Since DT doesn't provide an idiomatic mechanism for
* enabling full constraints and since it's much more natural
--
1.7.9.5
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