diff options
| author | Mikhail Kshevetskiy <[email protected]> | 2025-09-30 03:20:50 +0300 |
|---|---|---|
| committer | Michael Trimarchi <[email protected]> | 2025-10-05 20:25:51 +0200 |
| commit | 64b7865c72b8b3bc3c08e095888d6c7dce7c7c27 (patch) | |
| tree | 58907c7622d6af83c0f4a954ec0cd46ddce48043 /include/linux | |
| parent | bae27e402d050154ebb8e677d409f49376cc985a (diff) | |
mtd: spinand: Extend spinand_wait() to match Linux kernel implementation
This aligns spinand_wait() with the linux kernel. Instead of calling into
spi_mem_poll_status() which is not implemented in U-Boot, we code the
polling logic and make sure that schedule() is called periodically.
Signed-off-by: Mikhail Kshevetskiy <[email protected]>
Reviewed-by: Frieder Schrempf <[email protected]>
Signed-off-by: Michael Trimarchi <[email protected]>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/mtd/spinand.h | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/include/linux/mtd/spinand.h b/include/linux/mtd/spinand.h index 163269313f6..ba6c2ba149d 100644 --- a/include/linux/mtd/spinand.h +++ b/include/linux/mtd/spinand.h @@ -176,6 +176,28 @@ struct spinand_op; struct spinand_device; #define SPINAND_MAX_ID_LEN 4 +/* + * For erase, write and read operation, we got the following timings : + * tBERS (erase) 1ms to 4ms + * tPROG 300us to 400us + * tREAD 25us to 100us + * In order to minimize latency, the min value is divided by 4 for the + * initial delay, and dividing by 20 for the poll delay. + * For reset, 5us/10us/500us if the device is respectively + * reading/programming/erasing when the RESET occurs. Since we always + * issue a RESET when the device is IDLE, 5us is selected for both initial + * and poll delay. + */ +#define SPINAND_READ_INITIAL_DELAY_US 6 +#define SPINAND_READ_POLL_DELAY_US 5 +#define SPINAND_RESET_INITIAL_DELAY_US 5 +#define SPINAND_RESET_POLL_DELAY_US 5 +#define SPINAND_WRITE_INITIAL_DELAY_US 75 +#define SPINAND_WRITE_POLL_DELAY_US 15 +#define SPINAND_ERASE_INITIAL_DELAY_US 250 +#define SPINAND_ERASE_POLL_DELAY_US 50 + +#define SPINAND_WAITRDY_TIMEOUT_MS 400 /** * struct spinand_id - SPI NAND id structure |