diff options
Diffstat (limited to 'drivers/mtd/devices/st_spi_fsm.c')
| -rw-r--r-- | drivers/mtd/devices/st_spi_fsm.c | 23 |
1 files changed, 10 insertions, 13 deletions
diff --git a/drivers/mtd/devices/st_spi_fsm.c b/drivers/mtd/devices/st_spi_fsm.c index d7e38cc8814f..40eb830eea21 100644 --- a/drivers/mtd/devices/st_spi_fsm.c +++ b/drivers/mtd/devices/st_spi_fsm.c @@ -270,7 +270,6 @@ */ #define CFG_READ_TOGGLE_32BIT_ADDR 0x00000001 #define CFG_WRITE_TOGGLE_32BIT_ADDR 0x00000002 -#define CFG_WRITE_EX_32BIT_ADDR_DELAY 0x00000004 #define CFG_ERASESEC_TOGGLE_32BIT_ADDR 0x00000008 #define CFG_S25FL_CHECK_ERROR_FLAGS 0x00000010 @@ -1152,23 +1151,17 @@ static int stfsm_mx25_config(struct stfsm *fsm) stfsm_mx25_en_32bit_addr_seq(&fsm->stfsm_seq_en_32bit_addr); soc_reset = stfsm_can_handle_soc_reset(fsm); - if (soc_reset || !fsm->booted_from_spi) { + if (soc_reset || !fsm->booted_from_spi) /* If we can handle SoC resets, we enable 32-bit address * mode pervasively */ stfsm_enter_32bit_addr(fsm, 1); - } else { + else /* Else, enable/disable 32-bit addressing before/after * each operation */ fsm->configuration = (CFG_READ_TOGGLE_32BIT_ADDR | CFG_WRITE_TOGGLE_32BIT_ADDR | CFG_ERASESEC_TOGGLE_32BIT_ADDR); - /* It seems a small delay is required after exiting - * 32-bit mode following a write operation. The issue - * is under investigation. - */ - fsm->configuration |= CFG_WRITE_EX_32BIT_ADDR_DELAY; - } } /* For QUAD mode, set 'QE' STATUS bit */ @@ -1631,11 +1624,8 @@ static int stfsm_write(struct stfsm *fsm, const uint8_t *buf, stfsm_s25fl_clear_status_reg(fsm); /* Exit 32-bit address mode, if required */ - if (fsm->configuration & CFG_WRITE_TOGGLE_32BIT_ADDR) { + if (fsm->configuration & CFG_WRITE_TOGGLE_32BIT_ADDR) stfsm_enter_32bit_addr(fsm, 0); - if (fsm->configuration & CFG_WRITE_EX_32BIT_ADDR_DELAY) - udelay(1); - } return 0; } @@ -1938,6 +1928,13 @@ static int stfsm_init(struct stfsm *fsm) fsm->base + SPI_CONFIGDATA); writel(STFSM_DEFAULT_WR_TIME, fsm->base + SPI_STATUS_WR_TIME_REG); + /* + * Set the FSM 'WAIT' delay to the minimum workable value. Note, for + * our purposes, the WAIT instruction is used purely to achieve + * "sequence validity" rather than actually implement a delay. + */ + writel(0x00000001, fsm->base + SPI_PROGRAM_ERASE_TIME); + /* Clear FIFO, just in case */ stfsm_clear_fifo(fsm); |