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

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>

diff --git a/drivers/mtd/devices/st_spi_fsm.c b/drivers/mtd/devices/st_spi_fsm.c
index b4d2a188672e8591733833bb36d6e8b72039a11d..b4afee0e0e337c92d373a24930a565918f99b7b4 100644 (file)
--- a/drivers/mtd/devices/st_spi_fsm.c
+++ b/drivers/mtd/devices/st_spi_fsm.c
@@ -845,6 +845,38 @@ 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;
@@ -1151,6 +1183,10 @@ 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;
        }
 
        fsm->mtd.dev.parent     = &pdev->dev;