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mtd: st_spi_fsm: Prepare default sequences for read/write/erase

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Most chips require a predefined set of FSM message sequences for read,
write and erase operations. This patch provides a way to set them up,
which it will do so if a chip specific initialisation routine isn't
been provided.

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 09:20:56 +00:00 committed by Brian Norris
parent 218b870f90
commit 4eb3f0d8f7
1 changed files with 36 additions and 0 deletions
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36
drivers/mtd/devices/st_spi_fsm.c
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@ -845,6 +845,38 @@ static int stfsm_search_prepare_rw_seq(struct stfsm *fsm,
return 0; return 0;
} }
/* Prepare a READ/WRITE/ERASE 'default' sequences */
static int stfsm_prepare_rwe_seqs_default(struct stfsm *fsm)
{
uint32_t flags = fsm->info->flags;
int ret;
/* Configure 'READ' sequence */
ret = stfsm_search_prepare_rw_seq(fsm, &stfsm_seq_read,
default_read_configs);
if (ret) {
dev_err(fsm->dev,
"failed to prep READ sequence with flags [0x%08x]\n",
flags);
return ret;
}
/* Configure 'WRITE' sequence */
ret = stfsm_search_prepare_rw_seq(fsm, &stfsm_seq_write,
default_write_configs);
if (ret) {
dev_err(fsm->dev,
"failed to prep WRITE sequence with flags [0x%08x]\n",
flags);
return ret;
}
/* Configure 'ERASE_SECTOR' sequence */
stfsm_prepare_erasesec_seq(fsm, &stfsm_seq_erase_sector);
return 0;
}
static int stfsm_n25q_config(struct stfsm *fsm) static int stfsm_n25q_config(struct stfsm *fsm)
{ {
uint32_t flags = fsm->info->flags; uint32_t flags = fsm->info->flags;
@ -1151,6 +1183,10 @@ static int stfsm_probe(struct platform_device *pdev)
ret = info->config(fsm); ret = info->config(fsm);
if (ret) if (ret)
return ret; return ret;
} else {
ret = stfsm_prepare_rwe_seqs_default(fsm);
if (ret)
return ret;
} }
fsm->mtd.dev.parent = &pdev->dev; fsm->mtd.dev.parent = &pdev->dev;