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| author | Richard Fitzgerald <rf@opensource.cirrus.com> | 2021-01-07 16:48:25 +0000 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2021-01-13 17:36:40 +0000 |
| commit | c6892892a95debac8050579b0709214b7b28b514 (patch) | |
| tree | 699900b3f77d68c2ed2943f00fbc66952f08562a /drivers | |
| parent | 72366b3c530c763ceda64f82741111e45ea881f9 (diff) | |
| download | lwn-c6892892a95debac8050579b0709214b7b28b514.tar.gz lwn-c6892892a95debac8050579b0709214b7b28b514.zip | |
spi: bcm2835: Set controller max_speed_hz
Set the struct spi_controller max_speed_hz. This is based on the
reported source clock frequency during probe. The maximum bus clock
is half the source clock (as per the code in bcm2835_spi_transfer_one).
Signed-off-by: Richard Fitzgerald <rf@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20210107164825.21919-1-rf@opensource.cirrus.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/spi/spi-bcm2835.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/spi/spi-bcm2835.c b/drivers/spi/spi-bcm2835.c index 197485f2c2b2..8e161f4f7766 100644 --- a/drivers/spi/spi-bcm2835.c +++ b/drivers/spi/spi-bcm2835.c @@ -1307,6 +1307,8 @@ static int bcm2835_spi_probe(struct platform_device *pdev) return dev_err_probe(&pdev->dev, PTR_ERR(bs->clk), "could not get clk\n"); + ctlr->max_speed_hz = clk_get_rate(bs->clk) / 2; + bs->irq = platform_get_irq(pdev, 0); if (bs->irq <= 0) return bs->irq ? bs->irq : -ENODEV; |