diff options
| author | Maciej Purski <m.purski@samsung.com> | 2018-04-23 17:33:39 +0300 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2018-05-17 10:05:48 +0300 |
| commit | a085a31af566254fb8f7721911c828c8fa797894 (patch) | |
| tree | 138f241b458d6ddf3b1e80d2765e16df1fcba36f /include/linux/regulator/driver.h | |
| parent | f98618b34542706eddc3b66abc271f1c8d8c4a05 (diff) | |
| download | linux-a085a31af566254fb8f7721911c828c8fa797894.tar.xz | |
regulator: core: Parse coupled regulators properties
On Odroid XU3/4 and other Exynos5422 based boards there is a case, that
different devices on the board are supplied by different regulators
with non-fixed voltages. If one of these devices temporarily requires
higher voltage, there might occur a situation that the spread between
devices' voltages is so high, that there is a risk of changing
'high' and 'low' states on the interconnection between devices powered
by those regulators.
Add new structure "coupling_desc" to regulator_dev, which contains
pointers to all coupled regulators including the owner of the structure,
number of coupled regulators and counter of currently resolved
regulators.
Add of_functions to parse all data needed in regulator coupling.
Provide method to check DTS data consistency. Check if each coupled
regulator's max_spread is equal and if their lists of regulators match.
Signed-off-by: Maciej Purski <m.purski@samsung.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'include/linux/regulator/driver.h')
| -rw-r--r-- | include/linux/regulator/driver.h | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/include/linux/regulator/driver.h b/include/linux/regulator/driver.h index c2a181fa7287..fc2dc8df476f 100644 --- a/include/linux/regulator/driver.h +++ b/include/linux/regulator/driver.h @@ -15,6 +15,8 @@ #ifndef __LINUX_REGULATOR_DRIVER_H_ #define __LINUX_REGULATOR_DRIVER_H_ +#define MAX_COUPLED 4 + #include <linux/device.h> #include <linux/notifier.h> #include <linux/regulator/consumer.h> @@ -410,6 +412,20 @@ struct regulator_config { }; /* + * struct coupling_desc + * + * Describes coupling of regulators. Each regulator should have + * at least a pointer to itself in coupled_rdevs array. + * When a new coupled regulator is resolved, n_resolved is + * incremented. + */ +struct coupling_desc { + struct regulator_dev *coupled_rdevs[MAX_COUPLED]; + int n_resolved; + int n_coupled; +}; + +/* * struct regulator_dev * * Voltage / Current regulator class device. One for each @@ -432,6 +448,8 @@ struct regulator_dev { /* lists we own */ struct list_head consumer_list; /* consumers we supply */ + struct coupling_desc coupling_desc; + struct blocking_notifier_head notifier; struct mutex mutex; /* consumer lock */ struct task_struct *mutex_owner; |