Kernel/linux-stable
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git synced 2025-01-16 18:26:42 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

mtd: st_spi_fsm: Add the ability to write to FSM's status register

Browse Source 
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>
This commit is contained in:
Lee Jones 2014-03-20 09:21:02 +00:00 committed by Brian Norris
parent ac94dbcb67
commit 150571b74a
1 changed files with 36 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

36
drivers/mtd/devices/st_spi_fsm.c
View File

@ -588,6 +588,23 @@ static struct stfsm_seq stfsm_seq_erase_chip = {
SEQ_CFG_STARTSEQ),
};
static struct stfsm_seq stfsm_seq_write_status = {
.seq_opc[0] = (SEQ_OPC_PADS_1 | SEQ_OPC_CYCLES(8) |
SEQ_OPC_OPCODE(FLASH_CMD_WREN) | SEQ_OPC_CSDEASSERT),
.seq_opc[1] = (SEQ_OPC_PADS_1 | SEQ_OPC_CYCLES(8) |
SEQ_OPC_OPCODE(FLASH_CMD_WRSR)),
.seq = {
STFSM_INST_CMD1,
STFSM_INST_CMD2,
STFSM_INST_STA_WR1,
STFSM_INST_STOP,
},
.seq_cfg = (SEQ_CFG_PADS_1 |
SEQ_CFG_READNOTWRITE |
SEQ_CFG_CSDEASSERT |
SEQ_CFG_STARTSEQ),
};
static struct stfsm_seq stfsm_seq_wrvcr = {
.seq_opc[0] = (SEQ_OPC_PADS_1 | SEQ_OPC_CYCLES(8) |
SEQ_OPC_OPCODE(FLASH_CMD_WREN) | SEQ_OPC_CSDEASSERT),
@ -817,6 +834,25 @@ static int stfsm_read_status(struct stfsm *fsm, uint8_t cmd,
return 0;
}
static int stfsm_write_status(struct stfsm *fsm, uint16_t status,
int sta_bytes)
{
struct stfsm_seq *seq = &stfsm_seq_write_status;
dev_dbg(fsm->dev, "writing STA[%s] 0x%04x\n",
(sta_bytes == 1) ? "1" : "1+2", status);
seq->status = (uint32_t)status | STA_PADS_1 | STA_CSDEASSERT;
seq->seq[2] = (sta_bytes == 1) ?
STFSM_INST_STA_WR1 : STFSM_INST_STA_WR1_2;
stfsm_load_seq(fsm, seq);
stfsm_wait_seq(fsm);
return 0;
};
static int stfsm_wrvcr(struct stfsm *fsm, uint8_t data)
{
struct stfsm_seq *seq = &stfsm_seq_wrvcr;