Hi, On Thu, May 26, 2016 at 07:25:25PM -0000, Michal Suchanek wrote: > The maximum speed of SPI master is used when maximum speed of SPI slave > is not specified. Also the __spi_validate function should check that > transfer speeds do not exceed the master limits. > > The user manual for A10 and A31 specifies maximum > speed of the SPI clock as 100MHz and minimum as 3kHz. > > Setting the SPI clock to out-of-spec values can lock up the SoC. > > Signed-off-by: Michal Suchanek <hramrach@xxxxxxxxx> > --- > drivers/spi/spi-sun4i.c | 2 ++ > drivers/spi/spi-sun6i.c | 2 ++ > 2 files changed, 4 insertions(+) > > diff --git a/drivers/spi/spi-sun4i.c b/drivers/spi/spi-sun4i.c > index bf52b09..e1a75dd6 100644 > --- a/drivers/spi/spi-sun4i.c > +++ b/drivers/spi/spi-sun4i.c > @@ -405,6 +405,8 @@ static int sun4i_spi_probe(struct platform_device *pdev) > } > > sspi->master = master; > + master->max_speed_hz = 100*1000*1000; You need spaces around the * operator. > + master->min_speed_hz = 3*1000; And I'm not exactly sure why you have that weird indentation. The same applies for the sun6i driver Thanks! Maxime -- Maxime Ripard, Free Electrons Embedded Linux, Kernel and Android engineering http://free-electrons.com
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