Commit b52a37f5 authored by Axel Lin's avatar Axel Lin Committed by Mark Brown
Browse files

spi: orion: Let spi core handle checking transfer speed 



Since commit a2fd4f9f 'spi: Support transfer speed checking in the core',
the SPI core validates the desired speed of a given transfer against the
minimum and maximum speeds supported by the controller.
So we can remove the same code in this driver and let spi core handle checking
the desired speed of a given transfer.

Signed-off-by: default avatarAxel Lin <axel.lin@ingics.com>
Signed-off-by: default avatarMark Brown <broonie@linaro.org>
parent 1647138d

drivers/spi/spi-orion.c

+2 −37
Original line number Diff line number Diff line
@@ -43,8 +43,6 @@ 
struct orion_spi {

	struct spi_master	*master;

	void __iomem		*base;

	unsigned int		max_speed;

	unsigned int		min_speed;

	struct clk              *clk;

};
@@ -319,16 +317,6 @@ static int orion_spi_transfer_one_message(struct spi_master *master, 
			goto msg_done;

		}



		if (t->speed_hz && t->speed_hz < orion_spi->min_speed) {

			dev_err(&spi->dev,

				"message rejected : "

				"device min speed (%d Hz) exceeds "

				"required transfer speed (%d Hz)\n",

				orion_spi->min_speed, t->speed_hz);

			status = -EIO;

			goto msg_done;

		}



		if (par_override || t->speed_hz || t->bits_per_word) {

			par_override = 1;

			status = orion_spi_setup_transfer(spi, t);
@@ -373,28 +361,6 @@ static int orion_spi_reset(struct orion_spi *orion_spi) 
	return 0;

}



static int orion_spi_setup(struct spi_device *spi)

{

	struct orion_spi *orion_spi;



	orion_spi = spi_master_get_devdata(spi->master);



	if ((spi->max_speed_hz == 0)

			|| (spi->max_speed_hz > orion_spi->max_speed))

		spi->max_speed_hz = orion_spi->max_speed;



	if (spi->max_speed_hz < orion_spi->min_speed) {

		dev_err(&spi->dev, "setup: requested speed too low %d Hz\n",

			spi->max_speed_hz);

		return -EINVAL;

	}



	/*

	 * baudrate & width will be set orion_spi_setup_transfer

	 */

	return 0;

}



static int orion_spi_probe(struct platform_device *pdev)

{

	struct spi_master *master;
@@ -423,7 +389,6 @@ static int orion_spi_probe(struct platform_device *pdev) 
	/* we support only mode 0, and no options */

	master->mode_bits = SPI_CPHA | SPI_CPOL;



	master->setup = orion_spi_setup;

	master->transfer_one_message = orion_spi_transfer_one_message;

	master->num_chipselect = ORION_NUM_CHIPSELECTS;
@@ -441,8 +406,8 @@ static int orion_spi_probe(struct platform_device *pdev) 
	clk_prepare(spi->clk);

	clk_enable(spi->clk);

	tclk_hz = clk_get_rate(spi->clk);

	spi->max_speed = DIV_ROUND_UP(tclk_hz, 4);

	spi->min_speed = DIV_ROUND_UP(tclk_hz, 30);

	master->max_speed_hz = DIV_ROUND_UP(tclk_hz, 4);

	master->min_speed_hz = DIV_ROUND_UP(tclk_hz, 30);



	r = platform_get_resource(pdev, IORESOURCE_MEM, 0);

	spi->base = devm_ioremap_resource(&pdev->dev, r);

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