Commit 09e99bca authored by Axel Lin's avatar Axel Lin Committed by Mark Brown
Browse files

spi: sc18is602: Convert to let spi core validate transfer speed 



Set master->max_speed_hz and master->min_speed_hz then spi core will handle
checking transfer speed. So we can remove the same checking in this driver.

This patch also remove testing if hz is 0 because spi->max_speed_hz will be
default set to master->min_speed_hz if it was not set. So the transfer speed
will never set to 0.

Signed-off-by: default avatarAxel Lin <axel.lin@ingics.com>
Signed-off-by: default avatarMark Brown <broonie@linaro.org>
parent c5c67e31

drivers/spi/spi-sc18is602.c

+3 −10
Original line number Diff line number Diff line
@@ -183,17 +183,9 @@ static int sc18is602_setup_transfer(struct sc18is602 *hw, u32 hz, u8 mode) 
static int sc18is602_check_transfer(struct spi_device *spi,

				    struct spi_transfer *t, int tlen)

{

	uint32_t hz;



	if (t && t->len + tlen > SC18IS602_BUFSIZ)

		return -EINVAL;



	hz = spi->max_speed_hz;

	if (t && t->speed_hz)

		hz = t->speed_hz;

	if (hz == 0)

		return -EINVAL;



	return 0;

}
@@ -207,14 +199,13 @@ static int sc18is602_transfer_one(struct spi_master *master, 


	hw->tlen = 0;

	list_for_each_entry(t, &m->transfers, transfer_list) {

		u32 hz = t->speed_hz ? : spi->max_speed_hz;

		bool do_transfer;



		status = sc18is602_check_transfer(spi, t, hw->tlen);

		if (status < 0)

			break;



		status = sc18is602_setup_transfer(hw, hz, spi->mode);

		status = sc18is602_setup_transfer(hw, t->speed_hz, spi->mode);

		if (status < 0)

			break;
@@ -305,6 +296,8 @@ static int sc18is602_probe(struct i2c_client *client, 
	master->setup = sc18is602_setup;

	master->transfer_one_message = sc18is602_transfer_one;

	master->dev.of_node = np;

	master->min_speed_hz = hw->freq / 128;

	master->max_speed_hz = hw->freq / 4;



	error = devm_spi_register_master(dev, master);

	if (error)

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