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diff --git a/sys/dev/mmc/mmc_fdt_helpers.h b/sys/dev/mmc/mmc_fdt_helpers.h
--- a/sys/dev/mmc/mmc_fdt_helpers.h
+++ b/sys/dev/mmc/mmc_fdt_helpers.h
@@ -74,5 +74,6 @@
void mmc_fdt_gpio_teardown(struct mmc_fdt_helper *helper);
bool mmc_fdt_gpio_get_present(struct mmc_fdt_helper *helper);
bool mmc_fdt_gpio_get_readonly(struct mmc_fdt_helper *helper);
+void mmc_fdt_set_power(struct mmc_fdt_helper *helper, enum mmc_power_mode power_mode);
#endif
diff --git a/sys/dev/mmc/mmc_fdt_helpers.c b/sys/dev/mmc/mmc_fdt_helpers.c
--- a/sys/dev/mmc/mmc_fdt_helpers.c
+++ b/sys/dev/mmc/mmc_fdt_helpers.c
@@ -45,6 +45,8 @@
#include <dev/extres/regulator/regulator.h>
#endif
+#include "mmc_pwrseq_if.h"
+
static inline void
mmc_fdt_parse_sd_speed(phandle_t node, struct mmc_host *host)
{
@@ -423,3 +425,43 @@
return (pinstate ^ (helper->props & MMC_PROP_WP_INVERTED));
}
+
+void
+mmc_fdt_set_power(struct mmc_fdt_helper *helper, enum mmc_power_mode power_mode)
+{
+ int reg_status;
+ int rv;
+
+ switch (power_mode) {
+ case power_on:
+ break;
+ case power_off:
+ if (helper->vmmc_supply) {
+ rv = regulator_status(helper->vmmc_supply, &reg_status);
+ if (rv == 0 && reg_status == REGULATOR_STATUS_ENABLED)
+ regulator_disable(helper->vmmc_supply);
+ }
+ if (helper->vqmmc_supply) {
+ rv = regulator_status(helper->vqmmc_supply, &reg_status);
+ if (rv == 0 && reg_status == REGULATOR_STATUS_ENABLED)
+ regulator_disable(helper->vqmmc_supply);
+ }
+ if (helper->mmc_pwrseq)
+ MMC_PWRSEQ_SET_POWER(helper->mmc_pwrseq, false);
+ break;
+ case power_up:
+ if (helper->vmmc_supply) {
+ rv = regulator_status(helper->vmmc_supply, &reg_status);
+ if (rv == 0 && reg_status != REGULATOR_STATUS_ENABLED)
+ regulator_enable(helper->vmmc_supply);
+ }
+ if (helper->vqmmc_supply) {
+ rv = regulator_status(helper->vqmmc_supply, &reg_status);
+ if (rv == 0 && reg_status != REGULATOR_STATUS_ENABLED)
+ regulator_enable(helper->vqmmc_supply);
+ }
+ if (helper->mmc_pwrseq)
+ MMC_PWRSEQ_SET_POWER(helper->mmc_pwrseq, true);
+ break;
+ }
+}

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