[PATCH v4 25/37] mtd: st_spi_fsm: Prepare default sequences for read/write/erase
From: Lee Jones <hidden>
Date: 2014-01-08 13:52:56
Also in:
lkml
Subsystem:
memory technology devices (mtd), the rest · Maintainers:
Miquel Raynal, Richard Weinberger, Vignesh Raghavendra, Linus Torvalds
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 <redacted> --- 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 28d8ac0..a5b9d67 100644
--- a/drivers/mtd/devices/st_spi_fsm.c
+++ b/drivers/mtd/devices/st_spi_fsm.c@@ -838,6 +838,38 @@ 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;
@@ -1153,6 +1185,10 @@ 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);
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1.8.3.2