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path: root/drivers/mtd/spi/spi_flash_internal.h
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Diffstat (limited to 'drivers/mtd/spi/spi_flash_internal.h')
-rw-r--r--drivers/mtd/spi/spi_flash_internal.h9
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/mtd/spi/spi_flash_internal.h b/drivers/mtd/spi/spi_flash_internal.h
index f80f717..91e036a 100644
--- a/drivers/mtd/spi/spi_flash_internal.h
+++ b/drivers/mtd/spi/spi_flash_internal.h
@@ -20,6 +20,7 @@
#define CMD_READ_ARRAY_LEGACY 0xe8
#define CMD_PAGE_PROGRAM 0x02
+#define CMD_WRITE_DISABLE 0x04
#define CMD_READ_STATUS 0x05
#define CMD_WRITE_ENABLE 0x06
@@ -62,6 +63,14 @@ static inline int spi_flash_cmd_write_enable(struct spi_flash *flash)
}
/*
+ * Disable writing on the SPI flash.
+ */
+static inline int spi_flash_cmd_write_disable(struct spi_flash *flash)
+{
+ return spi_flash_cmd(flash->spi, CMD_WRITE_DISABLE, NULL, 0);
+}
+
+/*
* Same as spi_flash_cmd_read() except it also claims/releases the SPI
* bus. Used as common part of the ->read() operation.
*/