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D22260.id63997.diff
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D22260.id63997.diff

Index: sys/dev/extres/regulator/regnode_if.m
===================================================================
--- sys/dev/extres/regulator/regnode_if.m
+++ sys/dev/extres/regulator/regnode_if.m
@@ -90,6 +90,15 @@
int *uvolt;
};
+#
+# Check if a given voltage is supported by the regulator
+# Returns 0 on success or a standard errno value.
+#
+METHOD int check_voltage {
+ struct regnode *regnode;
+ int uvolt;
+};
+
#
# Stop (shutdown) regulator
# Returns 0 on success or a standard errno value.
Index: sys/dev/extres/regulator/regulator.h
===================================================================
--- sys/dev/extres/regulator/regulator.h
+++ sys/dev/extres/regulator/regulator.h
@@ -134,6 +134,7 @@
int regulator_status(regulator_t reg, int *status);
int regulator_get_voltage(regulator_t reg, int *uvolt);
int regulator_set_voltage(regulator_t reg, int min_uvolt, int max_uvolt);
+int regulator_check_voltage(regulator_t reg, int uvolt);
#ifdef FDT
int regulator_get_by_ofw_property(device_t dev, phandle_t node, char *name,
Index: sys/dev/extres/regulator/regulator.c
===================================================================
--- sys/dev/extres/regulator/regulator.c
+++ sys/dev/extres/regulator/regulator.c
@@ -72,6 +72,7 @@
static int regnode_method_set_voltage(struct regnode *regnode, int min_uvolt,
int max_uvolt, int *udelay);
static int regnode_method_get_voltage(struct regnode *regnode, int *uvolt);
+static int regnode_method_check_voltage(struct regnode *regnode, int uvolt);
static void regulator_constraint(void *dummy);
static void regulator_shutdown(void *dummy);
@@ -84,6 +85,7 @@
REGNODEMETHOD(regnode_status, regnode_method_status),
REGNODEMETHOD(regnode_set_voltage, regnode_method_set_voltage),
REGNODEMETHOD(regnode_get_voltage, regnode_method_get_voltage),
+ REGNODEMETHOD(regnode_check_voltage, regnode_method_check_voltage),
REGNODEMETHOD_END
};
@@ -278,6 +280,16 @@
(regnode->std_param.max_uvolt - regnode->std_param.min_uvolt) / 2);
}
+static int
+regnode_method_check_voltage(struct regnode *regnode, int uvolt)
+{
+
+ if ((uvolt > regnode->std_param.max_uvolt) ||
+ (uvolt < regnode->std_param.min_uvolt))
+ return (ERANGE);
+ return (0);
+}
+
/* ----------------------------------------------------------------------------
*
* Internal functions.
@@ -995,6 +1007,22 @@
return (rv);
}
+int
+regulator_check_voltage(regulator_t reg, int uvolt)
+{
+ int rv;
+ struct regnode *regnode;
+
+ regnode = reg->regnode;
+ KASSERT(regnode->ref_cnt > 0,
+ ("Attempt to access unreferenced regulator: %s\n", regnode->name));
+
+ REG_TOPO_SLOCK();
+ rv = REGNODE_CHECK_VOLTAGE(regnode, uvolt);
+ REG_TOPO_UNLOCK();
+ return (rv);
+}
+
const char *
regulator_get_name(regulator_t reg)
{

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