diff options
| author | Pratyush Yadav <p.yadav@ti.com> | 2023-04-28 16:50:10 +0530 |
|---|---|---|
| committer | Udit Kumar <u-kumar1@ti.com> | 2023-05-22 22:07:17 +0530 |
| commit | 4282a8e6f1457843e180be16cd0b327de2ac97e8 (patch) | |
| tree | 2bb8b5f9401859ef84071964dc9ae499674cbd94 /include | |
| parent | 9a62668f7eb36e12e89a99653d265e93e7ef37d1 (diff) | |
spi: spi-mem: Tell controller when device is ready for calibration
Some controllers like the Cadence OSPI controller need to perform a
calibration sequence to operate at high clock speeds. This calibration
should happen after the flash is fully initialized otherwise the
calibration might happen in a different SPI mode from the one the flash
is finally set to. Add a hook that can be used to tell the controller
when the flash is ready for calibration. Whether calibration is needed
depends on the controller.
Signed-off-by: Pratyush Yadav <p.yadav@ti.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/spi-mem.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/include/spi-mem.h b/include/spi-mem.h index b07cf2ed83..f55361d628 100644 --- a/include/spi-mem.h +++ b/include/spi-mem.h @@ -241,6 +241,12 @@ static inline void *spi_mem_get_drvdata(struct spi_mem *mem) * the currently mapped area), and the caller of * spi_mem_dirmap_write() is responsible for calling it again in * this case. + * @do_calibration: perform calibration needed for high SPI clock speed + * operation. Should be called after the SPI memory device has + * been completely initialized. The op passed should contain + * a template for the read operation used for the device so + * the controller can decide what type of calibration is + * required for this type of read. * * This interface should be implemented by SPI controllers providing an * high-level interface to execute SPI memory operation, which is usually the @@ -264,6 +270,7 @@ struct spi_controller_mem_ops { u64 offs, size_t len, void *buf); ssize_t (*dirmap_write)(struct spi_mem_dirmap_desc *desc, u64 offs, size_t len, const void *buf); + void (*do_calibration)(struct spi_slave *slave, struct spi_mem_op *op); }; #ifndef __UBOOT__ @@ -338,6 +345,7 @@ ssize_t spi_mem_dirmap_read(struct spi_mem_dirmap_desc *desc, u64 offs, size_t len, void *buf); ssize_t spi_mem_dirmap_write(struct spi_mem_dirmap_desc *desc, u64 offs, size_t len, const void *buf); +int spi_mem_do_calibration(struct spi_slave *slave, struct spi_mem_op *op); #ifndef __UBOOT__ int spi_mem_driver_register_with_owner(struct spi_mem_driver *drv, |