D14781.id41072.diff
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D14781.id41072.diff
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	Index: head/sys/dev/extres/regulator/regulator.c
	===================================================================
	--- head/sys/dev/extres/regulator/regulator.c
	+++ head/sys/dev/extres/regulator/regulator.c
	@@ -71,6 +71,7 @@
	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 void regulator_shutdown(void *dummy);

	/*
	* Regulator controller methods.
	@@ -150,6 +151,36 @@
	#define REGNODE_SLOCK(_sc) sx_slock(&((_sc)->lock))
	#define REGNODE_XLOCK(_sc) sx_xlock(&((_sc)->lock))
	#define REGNODE_UNLOCK(_sc) sx_unlock(&((_sc)->lock))
	+
	+SYSINIT(regulator_shutdown, SI_SUB_LAST, SI_ORDER_ANY, regulator_shutdown,
	+ NULL);
	+
	+/*
	+ * Disable unused regulator
	+ * We run this function at SI_SUB_LAST which mean that every driver that needs
	+ * regulator should have already enable them.
	+ * All the remaining regulators should be those left enabled by the bootloader
	+ * or enable by default by the PMIC.
	+ */
	+static void
	+regulator_shutdown(void *dummy)
	+{
	+ struct regnode *entry;
	+ int disable = 1;
	+
	+ REG_TOPO_SLOCK();
	+ TUNABLE_INT_FETCH("hw.regulator.disable_unused", &disable);
	+ TAILQ_FOREACH(entry, &regnode_list, reglist_link) {
	+ if (entry->enable_cnt == 0 &&
	+ entry->std_param.always_on == 0 && disable) {
	+ if (bootverbose)
	+ printf("regulator: shuting down %s\n",
	+ entry->name);
	+ regnode_stop(entry, 0);
	+ }
	+ }
	+ REG_TOPO_UNLOCK();
	+}

	/*
	* sysctl handler