[PATCH v3 25/36] mtd: st_spi_fsm: Prepare default sequences for read/write/erase

Lee Jones
2013-11-29T12:23:41Z

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.

Signed-off-by: Lee Jones <lee.jones@linaro.org>
---
drivers/mtd/devices/st_spi_fsm.c | 36 ++++++++++++++++++++++++++++++++++++
1 file changed, 36 insertions(+)

diff --git a/drivers/mtd/devices/st_spi_fsm.c b/drivers/mtd/devices/st_spi_fsm.c
index 2369da1..ad277f1 100644
--- a/drivers/mtd/devices/st_spi_fsm.c
+++ b/drivers/mtd/devices/st_spi_fsm.c
@@ -441,6 +441,38 @@ static int stfsm_search_prepare_rw_seq(struct stfsm *fsm,
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)
{
uint32_t flags = fsm->info->flags;
@@ -756,6 +788,10 @@ static int stfsm_probe(struct platform_device *pdev)
ret = info->config(fsm);
if (ret)
return ret;
+ } else {
+ ret = stfsm_prepare_rwe_seqs_default(fsm);
+ if (ret)
+ return ret;
}

platform_set_drvdata(pdev, fsm);
--
1.8.3.2