drivers: flash: spi_nor: boot into DPD

Boot into the deep power down state when `SPI_NOR_IDLE_IN_DPD` is not enabled. DPD is the correct hardware state for the `SUSPENDED` software state. Without this change, it takes a cycle of `SUSPENDED->ACTIVE->SUSPENDED` to get to the low power state. Signed-off-by: Jordan Yates <[email protected]>
zephyrproject-rtos · Dec 19, 2023 · 60a9f33 · 60a9f33
1 parent f82c2f9
commit 60a9f33
Showing 1 changed file with 10 additions and 0 deletions.
diff --git a/drivers/flash/spi_nor.c b/drivers/flash/spi_nor.c
@@ -1359,6 +1359,16 @@ static int spi_nor_pm_control(const struct device *dev, enum pm_device_action ac
 	case PM_DEVICE_ACTION_TURN_ON:
 		/* Coming out of power off */
 		rc = spi_nor_configure(dev);
+#ifndef CONFIG_SPI_NOR_IDLE_IN_DPD
+		if (rc == 0) {
+			/* Move to DPD, the correct device state
+			 * for PM_DEVICE_STATE_SUSPENDED
+			 */
+			acquire_device(dev);
+			rc = enter_dpd(dev);
+			release_device(dev);
+		}
+#endif /* CONFIG_SPI_NOR_IDLE_IN_DPD */
 		break;
 	case PM_DEVICE_ACTION_TURN_OFF:
 		break;