Commit 22a10bca authored by Stephen Boyd's avatar Stephen Boyd Committed by Mark Brown
Browse files

regulator: Add system_load constraint 



Some regulators have a fixed load that isn't captured by
consumers that the kernel knows about. Add a constraint to
support this.

Signed-off-by: default avatarStephen Boyd <sboyd@codeaurora.org>
Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent b787f68c

Documentation/devicetree/bindings/regulator/regulator.txt

+2 −0
Original line number Diff line number Diff line
@@ -37,6 +37,8 @@ Optional properties: 
- regulator-initial-mode: initial operating mode. The set of possible operating

  modes depends on the capabilities of every hardware so each device binding

  documentation explains which values the regulator supports.

- regulator-system-load: Load in uA present on regulator that is not captured by

  any consumer request.



Deprecated properties:

- regulator-compatible: If a regulator chip contains multiple

drivers/regulator/core.c

+2 −0
Original line number Diff line number Diff line
@@ -678,6 +678,8 @@ static int drms_uA_update(struct regulator_dev *rdev) 
	list_for_each_entry(sibling, &rdev->consumer_list, list)

		current_uA += sibling->uA_load;



	current_uA += rdev->constraints->system_load;



	if (rdev->desc->ops->set_load) {

		/* set the optimum mode for our new total regulator load */

		err = rdev->desc->ops->set_load(rdev, current_uA);

drivers/regulator/of_regulator.c

+3 −0
Original line number Diff line number Diff line
@@ -95,6 +95,9 @@ static void of_get_regulation_constraints(struct device_node *np, 
		}

	}



	if (!of_property_read_u32(np, "regulator-system-load", &pval))

		constraints->system_load = pval;



	for (i = 0; i < ARRAY_SIZE(regulator_states); i++) {

		switch (i) {

		case PM_SUSPEND_MEM:

include/linux/regulator/machine.h

+3 −0
Original line number Diff line number Diff line
@@ -75,6 +75,7 @@ struct regulator_state { 
 *

 * @min_uA: Smallest current consumers may set.

 * @max_uA: Largest current consumers may set.

 * @system_load: Load that isn't captured by any consumer requests.

 *

 * @valid_modes_mask: Mask of modes which may be configured by consumers.

 * @valid_ops_mask: Operations which may be performed by consumers.
@@ -112,6 +113,8 @@ struct regulation_constraints { 
	int min_uA;

	int max_uA;



	int system_load;



	/* valid regulator operating modes for this machine */

	unsigned int valid_modes_mask;