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author | Lee Jones <lee.jones@linaro.org> | 2014-03-20 10:20:58 +0100 |
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committer | Brian Norris <computersforpeace@gmail.com> | 2014-03-20 12:17:19 +0100 |
commit | 30ca64f9f9db014755d632acffd0d2b507d7af6d (patch) | |
tree | 49a804ac569e09df3c355dcc6de17dc31c4f50e6 /drivers/mtd/devices | |
parent | mtd: st_spi_fsm: Add the ability to read from a Serial Flash device (diff) | |
download | linux-30ca64f9f9db014755d632acffd0d2b507d7af6d.tar.xz linux-30ca64f9f9db014755d632acffd0d2b507d7af6d.zip |
mtd: st_spi_fsm: Write to Flash via the FSM FIFO
When we write data to the FIFO the FSM Controller subsequently writes
that data out to the Serial Flash chip.
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>
Diffstat (limited to 'drivers/mtd/devices')
-rw-r--r-- | drivers/mtd/devices/st_spi_fsm.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/drivers/mtd/devices/st_spi_fsm.c b/drivers/mtd/devices/st_spi_fsm.c index b1a65c1359d5..58b8761dc30e 100644 --- a/drivers/mtd/devices/st_spi_fsm.c +++ b/drivers/mtd/devices/st_spi_fsm.c @@ -668,6 +668,20 @@ static void stfsm_read_fifo(struct stfsm *fsm, uint32_t *buf, } } +static int stfsm_write_fifo(struct stfsm *fsm, + const uint32_t *buf, const uint32_t size) +{ + uint32_t words = size >> 2; + + dev_dbg(fsm->dev, "writing %d bytes to FIFO\n", size); + + BUG_ON((((uint32_t)buf) & 0x3) || (size & 0x3)); + + writesl(fsm->base + SPI_FAST_SEQ_DATA_REG, buf, words); + + return size; +} + static int stfsm_enter_32bit_addr(struct stfsm *fsm, int enter) { struct stfsm_seq *seq = &stfsm_seq_en_32bit_addr; |