From a085a31af566254fb8f7721911c828c8fa797894 Mon Sep 17 00:00:00 2001 From: Maciej Purski Date: Mon, 23 Apr 2018 16:33:39 +0200 Subject: 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 Signed-off-by: Mark Brown --- include/linux/regulator/machine.h | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'include/linux/regulator/machine.h') diff --git a/include/linux/regulator/machine.h b/include/linux/regulator/machine.h index 93a04893c739..3468703d663a 100644 --- a/include/linux/regulator/machine.h +++ b/include/linux/regulator/machine.h @@ -103,6 +103,7 @@ struct regulator_state { * @ilim_uA: Maximum input current. * @system_load: Load that isn't captured by any consumer requests. * + * @max_spread: Max possible spread between coupled regulators * @valid_modes_mask: Mask of modes which may be configured by consumers. * @valid_ops_mask: Operations which may be performed by consumers. * @@ -154,6 +155,9 @@ struct regulation_constraints { int system_load; + /* used for coupled regulators */ + int max_spread; + /* valid regulator operating modes for this machine */ unsigned int valid_modes_mask; -- cgit v1.2.3