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mtd: spi-nor-core: Enable octal DTR mode when possible

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Allow flashes to specify a hook to enable octal DTR mode. Use this hook
whenever possible to get optimal transfer speeds.

Signed-off-by: Pratyush Yadav <p.yadav@ti.com>
Reviewed-by: Jagan Teki <jagan@amarulasolutions.com>
This commit is contained in:
Pratyush Yadav 2021-06-26 00:47:21 +05:30 • committed by Jagan Teki
parent b862765c7c
commit 6b808e0864
2 changed files with 33 additions and 0 deletions
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2
include/linux/mtd/spi-nor.h
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@ -477,6 +477,7 @@ struct spi_flash {
* @flash_is_locked: [FLASH-SPECIFIC] check if a region of the SPI NOR is
* completely locked
* @quad_enable: [FLASH-SPECIFIC] enables SPI NOR quad mode
* @octal_dtr_enable: [FLASH-SPECIFIC] enables SPI NOR octal DTR mode.
* @priv: the private data
*/
struct spi_nor {
@ -524,6 +525,7 @@ struct spi_nor {
int (*flash_unlock)(struct spi_nor *nor, loff_t ofs, uint64_t len);
int (*flash_is_locked)(struct spi_nor *nor, loff_t ofs, uint64_t len);
int (*quad_enable)(struct spi_nor *nor);
int (*octal_dtr_enable)(struct spi_nor *nor);
void *priv;
/* Compatibility for spi_flash, remove once sf layer is merged with mtd */