2014-04-09 23:52 GMT+02:00 Olof Johansson <olof@xxxxxxxxx>: > Hi, > > On Wed, Apr 9, 2014 at 12:45 PM, Matthias Brugger > <matthias.bgg@xxxxxxxxx> wrote: >> This patch adds a clock source and clock event for the timer found >> on the Mediatek SoCs. >> >> The Mediatek General Porpose Timer block provides five 32 bit timers and >> one 64 bit timer. >> >> Two 32 bit timers are used: >> TIMER1: clock events supporting periodic and oneshot events >> TIMER2: clock source configured as a free running counter >> >> The General Porpose Timer block can be run with two clocks. A 13 MHz system >> clock and the RTC clock running at 32 KHz. This implementation uses the system >> clock. > > Hm, are you planning on using these on the Cortex-A7-based and newer > SoCs? On those, the arm generic timers should be available, and you > might be better off just using those there. I'm a bit puzzled about the timer naming. Are the arm generic timers the one used by ARM_ARCH_TIMER, or are they different ones? > > Of course, you'll still need these for the A9-based platforms, so the > driver might very well be needed anyway. Some of the earlier patches > seem to be for A7-based systems so I'm not sure what you're primarily > working on here. :) I'm working on a Cortex-A7 based platform. But ARM_ARCH_TIMER seems to get no clocking. Initializing the timer fails with: Architected timer frequency not available That's why I use the SoC timer. > > > -Olof -- motzblog.wordpress.com -- To unsubscribe from this list: send the line "unsubscribe linux-doc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
