diff options
| author | Lee Jones <lee.jones@linaro.org> | 2014-03-20 13:21:01 +0400 |
|---|---|---|
| committer | Brian Norris <computersforpeace@gmail.com> | 2014-03-20 15:17:20 +0400 |
| commit | ac94dbcb6779d184f89bde0f8e2c7368d7179dd8 (patch) | |
| tree | 9a1410e065ff7024d6775d0ae274467a6c77c68c /drivers/mtd | |
| parent | 4a341fe758657850cbf6d2c36ee9029c0210e3c5 (diff) | |
| download | linux-ac94dbcb6779d184f89bde0f8e2c7368d7179dd8.tar.xz | |
mtd: st_spi_fsm: Add the ability to read the FSM's status
Acked-by Angus Clark <angus.clark@st.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Diffstat (limited to 'drivers/mtd')
| -rw-r--r-- | drivers/mtd/devices/st_spi_fsm.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/drivers/mtd/devices/st_spi_fsm.c b/drivers/mtd/devices/st_spi_fsm.c index 34aac3f49ba9..5e315e31a839 100644 --- a/drivers/mtd/devices/st_spi_fsm.c +++ b/drivers/mtd/devices/st_spi_fsm.c @@ -793,6 +793,30 @@ static uint8_t stfsm_wait_busy(struct stfsm *fsm) return FLASH_STATUS_TIMEOUT; } +static int stfsm_read_status(struct stfsm *fsm, uint8_t cmd, + uint8_t *status) +{ + struct stfsm_seq *seq = &stfsm_seq_read_status_fifo; + uint32_t tmp; + + dev_dbg(fsm->dev, "reading STA[%s]\n", + (cmd == FLASH_CMD_RDSR) ? "1" : "2"); + + seq->seq_opc[0] = (SEQ_OPC_PADS_1 | + SEQ_OPC_CYCLES(8) | + SEQ_OPC_OPCODE(cmd)), + + stfsm_load_seq(fsm, seq); + + stfsm_read_fifo(fsm, &tmp, 4); + + *status = (uint8_t)(tmp >> 24); + + stfsm_wait_seq(fsm); + + return 0; +} + static int stfsm_wrvcr(struct stfsm *fsm, uint8_t data) { struct stfsm_seq *seq = &stfsm_seq_wrvcr; |