diff mbox series

[v6,2/4] mtd: spi-nor: otp: use more consistent wording

Message ID 20210607112744.21587-3-michael@walle.cc
State Accepted
Headers show
Series mtd: spi-nor: otp: 4 byte mode fix and erase support | expand

Commit Message

Michael Walle June 7, 2021, 11:27 a.m. UTC
Use the wording as used in the datasheet to describe the access methods
of the security registers (aka OTP storage). This will also match the
function names.

Signed-off-by: Michael Walle <michael@walle.cc>
Reviewed-by: Pratyush Yadav <p.yadav@ti.com>
Reviewed-by: Tudor Ambarus <tudor.ambarus@microchip.com>
---
 drivers/mtd/spi-nor/otp.c | 27 +++++++++++++++++++--------
 1 file changed, 19 insertions(+), 8 deletions(-)
diff mbox series

Patch

diff --git a/drivers/mtd/spi-nor/otp.c b/drivers/mtd/spi-nor/otp.c
index 91a4c510ed51..3898ed67ba1c 100644
--- a/drivers/mtd/spi-nor/otp.c
+++ b/drivers/mtd/spi-nor/otp.c
@@ -15,14 +15,21 @@ 
 #define spi_nor_otp_n_regions(nor) ((nor)->params->otp.org->n_regions)
 
 /**
- * spi_nor_otp_read_secr() - read OTP data
+ * spi_nor_otp_read_secr() - read security register
  * @nor:	pointer to 'struct spi_nor'
  * @addr:       offset to read from
  * @len:        number of bytes to read
  * @buf:        pointer to dst buffer
  *
- * Read OTP data from one region by using the SPINOR_OP_RSECR commands. This
- * method is used on GigaDevice and Winbond flashes.
+ * Read a security register by using the SPINOR_OP_RSECR commands.
+ *
+ * In Winbond/GigaDevice datasheets the term "security register" stands for
+ * an one-time-programmable memory area, consisting of multiple bytes (usually
+ * 256). Thus one "security register" maps to one OTP region.
+ *
+ * This method is used on GigaDevice and Winbond flashes.
+ *
+ * Please note, the read must not span multiple registers.
  *
  * Return: number of bytes read successfully, -errno otherwise
  */
@@ -56,16 +63,20 @@  int spi_nor_otp_read_secr(struct spi_nor *nor, loff_t addr, size_t len, u8 *buf)
 }
 
 /**
- * spi_nor_otp_write_secr() - write OTP data
+ * spi_nor_otp_write_secr() - write security register
  * @nor:        pointer to 'struct spi_nor'
  * @addr:       offset to write to
  * @len:        number of bytes to write
  * @buf:        pointer to src buffer
  *
- * Write OTP data to one region by using the SPINOR_OP_PSECR commands. This
- * method is used on GigaDevice and Winbond flashes.
+ * Write a security register by using the SPINOR_OP_PSECR commands.
+ *
+ * For more information on the term "security register", see the documentation
+ * of spi_nor_otp_read_secr().
+ *
+ * This method is used on GigaDevice and Winbond flashes.
  *
- * Please note, the write must not span multiple OTP regions.
+ * Please note, the write must not span multiple registers.
  *
  * Return: number of bytes written successfully, -errno otherwise
  */
@@ -88,7 +99,7 @@  int spi_nor_otp_write_secr(struct spi_nor *nor, loff_t addr, size_t len,
 
 	/*
 	 * We only support a write to one single page. For now all winbond
-	 * flashes only have one page per OTP region.
+	 * flashes only have one page per security register.
 	 */
 	ret = spi_nor_write_enable(nor);
 	if (ret)