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Commit 30b4b703 authored by Andy Shevchenko's avatar Andy Shevchenko Committed by Mark Brown
Browse files

spi: dw: print debug message with FIFO size 



When autodetection is used it would be useful to know what the FIFO size is.
The patch adds a debug message for this purpose.

Signed-off-by: default avatarAndy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent 3dbb3b98

drivers/spi/spi-dw.c

+5 −4
Original line number Diff line number Diff line
@@ -608,7 +608,7 @@ static void dw_spi_cleanup(struct spi_device *spi) 
}



/* Restart the controller, disable all interrupts, clean rx fifo */

static void spi_hw_init(struct dw_spi *dws)

static void spi_hw_init(struct device *dev, struct dw_spi *dws)

{

	spi_enable_chip(dws, 0);

	spi_mask_intr(dws, 0xff);
@@ -626,9 +626,10 @@ static void spi_hw_init(struct dw_spi *dws) 
			if (fifo != dw_readw(dws, DW_SPI_TXFLTR))

				break;

		}

		dw_writew(dws, DW_SPI_TXFLTR, 0);



		dws->fifo_len = (fifo == 2) ? 0 : fifo - 1;

		dw_writew(dws, DW_SPI_TXFLTR, 0);

		dev_dbg(dev, "Detected FIFO size: %u bytes\n", dws->fifo_len);

	}

}
@@ -668,7 +669,7 @@ int dw_spi_add_host(struct device *dev, struct dw_spi *dws) 
	master->dev.of_node = dev->of_node;



	/* Basic HW init */

	spi_hw_init(dws);

	spi_hw_init(dev, dws);



	if (dws->dma_ops && dws->dma_ops->dma_init) {

		ret = dws->dma_ops->dma_init(dws);
@@ -731,7 +732,7 @@ int dw_spi_resume_host(struct dw_spi *dws) 
{

	int ret;



	spi_hw_init(dws);

	spi_hw_init(&dws->master->dev, dws);

	ret = spi_master_resume(dws->master);

	if (ret)

		dev_err(&dws->master->dev, "fail to start queue (%d)\n", ret);