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mtd: rawnand: Add the nand_wait_rdy_op() helper and use it 

In order to make sure we use ->exec_op() to wait for chip readiness
when it's available we provide an helper that does the selection
between ->exec_op(), udelay(chip->chip_delay) and nand_wait_ready()
based on what's implemented by the controller driver.

We then use it in nand_wait_readrdy().

Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
This commit is contained in:
Boris Brezillon 2018-07-27 09:44:18 +02:00 committed by Miquel Raynal
parent 85e08e5864
commit 52f05b6b87
1 changed files with 26 additions and 5 deletions
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31
drivers/mtd/nand/raw/nand_base.c
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@ -2246,6 +2246,28 @@ static int nand_get_features_op(struct nand_chip *chip, u8 feature,
return 0;
}
static int nand_wait_rdy_op(struct nand_chip *chip, unsigned int timeout_ms,
unsigned int delay_ns)
{
if (chip->exec_op) {
struct nand_op_instr instrs[] = {
NAND_OP_WAIT_RDY(PSEC_TO_MSEC(timeout_ms),
PSEC_TO_NSEC(delay_ns)),
};
struct nand_operation op = NAND_OPERATION(instrs);
return nand_exec_op(chip, &op);
}
/* Apply delay or wait for ready/busy pin */
if (!chip->dev_ready)
udelay(chip->chip_delay);
else
nand_wait_ready(nand_to_mtd(chip));
return 0;
}
/**
* nand_reset_op - Do a reset operation
* @chip: The NAND chip
@ -3526,14 +3548,13 @@ static int nand_setup_read_retry(struct mtd_info *mtd, int retry_mode)
static void nand_wait_readrdy(struct nand_chip *chip)
{
const struct nand_sdr_timings *sdr;
if (!(chip->options & NAND_NEED_READRDY))
return;
/* Apply delay or wait for ready/busy pin */
if (!chip->dev_ready)
udelay(chip->chip_delay);
else
nand_wait_ready(nand_to_mtd(chip));
sdr = nand_get_sdr_timings(&chip->data_interface);
WARN_ON(nand_wait_rdy_op(chip, PSEC_TO_MSEC(sdr->tR_max), 0));
}
/**