On 10/06/12 11:31, Andrew Lunn wrote: > Extends the driver to get properties from device tree. Also extend the > kirkwood DT support to supply the needed properties. > > Signed-off-by: Andrew Lunn<[email protected]> > --- > Documentation/devicetree/bindings/i2c/mrvl-i2c.txt | 35 +++++++++++++++++- > arch/arm/boot/dts/kirkwood.dtsi | 13 +++++++ > arch/arm/mach-kirkwood/board-dt.c | 2 ++ > drivers/i2c/busses/i2c-mv64xxx.c | 38 > +++++++++++++++++--- > 4 files changed, 82 insertions(+), 6 deletions(-) > > diff --git a/Documentation/devicetree/bindings/i2c/mrvl-i2c.txt > b/Documentation/devicetree/bindings/i2c/mrvl-i2c.txt > index b891ee2..89ef899 100644 > --- a/Documentation/devicetree/bindings/i2c/mrvl-i2c.txt > +++ b/Documentation/devicetree/bindings/i2c/mrvl-i2c.txt > @@ -1,4 +1,4 @@ > -* I2C > +* Marvell MMP I2C controller > > Required properties : > > @@ -32,3 +32,36 @@ Examples: > interrupts =<58>; > }; > > +* Marvell MV64XXX I2C controller > + > +Required properties : > + > + - reg : Offset and length of the register set for the device > + - compatible : should be "marvell,mv64xxx-i2c" > + - interrupts : the interrupt number > + - frequency-m : m factor in baud rate calculation > + > +Recommended properties : > + > + - frequency-n : n factor in baud rate calculation > + - timeout-ms : How long to wait for a transaction to complete > + > +Baud Rate: > + > +The baud rate is calculated thus: > + > +Fscl = Ftclk > + ------------------------------------------ > + (frequency-n + 1) > + 10 *(frequency-m + 1) * 2 > + > +Examples:
I'd really rather see this calculated at run-time, given some systems can quite easily change their clocks. -- Ben Dooks http://www.codethink.co.uk/ Senior Engineer Codethink - Providing Genius ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ spi-devel-general mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/spi-devel-general
