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| author | Andy Shevchenko <andriy.shevchenko@linux.intel.com> | 2015-01-07 14:56:55 (GMT) |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2015-01-07 18:01:06 (GMT) |
| commit | 30b4b703a5d5aa9977f5ad3aba3d77b6b8d0d255 (patch) | |
| tree | 698c9525ae87d12d4a5b84c1231d322bf4e757c8 /drivers/spi/spi-dw.c | |
| parent | 3dbb3b98e854bceed38fbde930fb8cf8701def73 (diff) | |
| download | linux-30b4b703a5d5aa9977f5ad3aba3d77b6b8d0d255.tar.xz | |
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: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'drivers/spi/spi-dw.c')
| -rw-r--r-- | drivers/spi/spi-dw.c | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/drivers/spi/spi-dw.c b/drivers/spi/spi-dw.c index 8edcd1b..5a97a62 100644 --- a/drivers/spi/spi-dw.c +++ b/drivers/spi/spi-dw.c @@ -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); |