[PATCH 26/35] mtd: st_spi_fsm: Write to Flash via the FSM FIFO
From: Lee Jones <hidden>
Date: 2014-02-18 15:01:04
Also in:
lkml
Subsystem:
memory technology devices (mtd), the rest · Maintainers:
Miquel Raynal, Richard Weinberger, Vignesh Raghavendra, Linus Torvalds
When we write data to the FIFO the FSM Controller subsequently writes that data out to the Serial Flash chip. Acked-by Angus Clark [off-list ref] Signed-off-by: Lee Jones <redacted> --- drivers/mtd/devices/st_spi_fsm.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+)
diff --git a/drivers/mtd/devices/st_spi_fsm.c b/drivers/mtd/devices/st_spi_fsm.c
index e4815fe..ea55548 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;
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1.8.3.2