mtd: st_spi_fsm: Write to Flash via the FSM FIFO (30ca64f9) · Commits · 戴 / test

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>

drivers/mtd/devices/st_spi_fsm.c

+14 −0

Original line number	Diff line number	Diff line
		@@ -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;

Admin message