drivers: flash: fix hw write protect before sw

This change sets write-protect pin disabled BEFORE SW write-protect disable and write-protect pin enabled AFTER SW write-protect enable. Signed-off-by: J.P. Hutchins <[email protected]>
HaavardRei · Sep 13, 2023 · d731338 · d731338
1 parent b403fde
commit d731338
Showing 1 changed file with 8 additions and 2 deletions.
diff --git a/drivers/flash/spi_nor.c b/drivers/flash/spi_nor.c
@@ -848,8 +848,8 @@ static int spi_nor_write_protection_set(const struct device *dev,
 	int ret;
 
 #if ANY_INST_HAS_WP_GPIOS
-	if (DEV_CFG(dev)->wp) {
-		gpio_pin_set_dt(DEV_CFG(dev)->wp, write_protect);
+	if (DEV_CFG(dev)->wp && write_protect == false) {
+		gpio_pin_set_dt(DEV_CFG(dev)->wp, 0);
 	}
 #endif
 
@@ -862,6 +862,12 @@ static int spi_nor_write_protection_set(const struct device *dev,
 		ret = spi_nor_cmd_write(dev, SPI_NOR_CMD_ULBPR);
 	}
 
+#if ANY_INST_HAS_WP_GPIOS
+	if (DEV_CFG(dev)->wp && write_protect == true) {
+		gpio_pin_set_dt(DEV_CFG(dev)->wp, 1);
+	}
+#endif
+
 	return ret;
 }