regulator: Fix 'do-nothing' value for regulators without suspend state

mszyprow · broonie · commit 3edd79cf5a44 · 2018-09-03T16:10:40.000+01:00
Some regulators don't have all states defined and in such cases regulator core should not assume anything. However in current implementation of of_get_regulation_constraints() DO_NOTHING_IN_SUSPEND enable value was set only for regulators which had suspend node defined, otherwise the default 0 value was used, what means DISABLE_IN_SUSPEND. This lead to broken system suspend/resume on boards, which had simple regulator constraints definition (without suspend state nodes). To avoid further mismatches between the default and uninitialized values of the suspend enabled/disabled states, change the values of the them, so default '0' means DO_NOTHING_IN_SUSPEND. Fixes: 72069f9: regulator: leave one item to record whether regulator is enabled Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> Signed-off-by: Mark Brown <broonie@kernel.org> Cc: stable@vger.kernel.org
diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
@@ -3161,7 +3161,7 @@ static inline int regulator_suspend_toggle(struct regulator_dev *rdev,
 	if (!rstate->changeable)
 		return -EPERM;
 
-	rstate->enabled = en;
+	rstate->enabled = (en) ? ENABLE_IN_SUSPEND : DISABLE_IN_SUSPEND;
 
 	return 0;
 }
diff --git a/drivers/regulator/of_regulator.c b/drivers/regulator/of_regulator.c
@@ -213,8 +213,6 @@ static void of_get_regulation_constraints(struct device_node *np,
 		else if (of_property_read_bool(suspend_np,
 					"regulator-off-in-suspend"))
 			suspend_state->enabled = DISABLE_IN_SUSPEND;
-		else
-			suspend_state->enabled = DO_NOTHING_IN_SUSPEND;
 
 		if (!of_property_read_u32(np, "regulator-suspend-min-microvolt",
 					  &pval))
diff --git a/include/linux/regulator/machine.h b/include/linux/regulator/machine.h
@@ -48,9 +48,9 @@ struct regulator;
  * DISABLE_IN_SUSPEND	- turn off regulator in suspend states
  * ENABLE_IN_SUSPEND	- keep regulator on in suspend states
  */
-#define DO_NOTHING_IN_SUSPEND	(-1)
-#define DISABLE_IN_SUSPEND	0
-#define ENABLE_IN_SUSPEND	1
+#define DO_NOTHING_IN_SUSPEND	0
+#define DISABLE_IN_SUSPEND	1
+#define ENABLE_IN_SUSPEND	2
 
 /* Regulator active discharge flags */
 enum regulator_active_discharge {

Original file line number	Diff line number	Diff line change
`@@ -3161,7 +3161,7 @@ static inline int regulator_suspend_toggle(struct regulator_dev *rdev,`
`3161`	`3161`	`if (!rstate->changeable)`
`3162`	`3162`	`return -EPERM;`
`3163`	`3163`
`3164`		`- rstate->enabled = en;`
	`3164`	`+ rstate->enabled = (en) ? ENABLE_IN_SUSPEND : DISABLE_IN_SUSPEND;`
`3165`	`3165`
`3166`	`3166`	`return 0;`
`3167`	`3167`	`}`