Commit 4eb3f0d8 authored by Lee Jones's avatar Lee Jones Committed by Brian Norris
Browse files

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: default avatarLee Jones <lee.jones@linaro.org>
Signed-off-by: default avatarBrian Norris <computersforpeace@gmail.com>
parent 218b870f

drivers/mtd/devices/st_spi_fsm.c

+36 −0
Original line number Diff line number Diff line
@@ -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;

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