On 02/03/2014 05:17 PM, Andrew Chew wrote: > Added timers that are present in tegra30 and later, that are NOT in tegra20. > > Also, some of these timer bases are needed in the tegra watchdog driver, so > separate them out into a header file that both the clocksource driver and > the watchdog driver can share them. > diff --git a/include/clocksource/tegra_timer.h b/include/clocksource/tegra_timer.h > +/* Tegra 20 timers */ > +#define TEGRA20_TIMER1_BASE 0x0 > +#define TEGRA20_TIMER2_BASE 0x8 > +#define TEGRA20_TIMER3_BASE 0x50 > +#define TEGRA20_TIMER4_BASE 0x58 > + > +/* Tegra 30 timers */ > +#define TEGRA30_TIMER1_BASE TEGRA20_TIMER1_BASE > +#define TEGRA30_TIMER2_BASE TEGRA20_TIMER2_BASE > +#define TEGRA30_TIMER3_BASE TEGRA20_TIMER3_BASE > +#define TEGRA30_TIMER4_BASE TEGRA20_TIMER4_BASE > +#define TEGRA30_TIMER5_BASE 0x60 > +#define TEGRA30_TIMER6_BASE 0x68 > +#define TEGRA30_TIMER7_BASE 0x70 > +#define TEGRA30_TIMER8_BASE 0x78 > +#define TEGRA30_TIMER9_BASE 0x80 > +#define TEGRA30_TIMER0_BASE 0x88 Why put the SoC name in the define names? Why not just have TIMER1_BASE..TIMER10_BASE (that should be 10 not 0 as in your patch, right?) and have the driver know that 1..4 are valid on Tegra20, and 1..10 are valid on later chips. I guess if the defines are moved into a header file, adding a TEGRA_ prefix does make sense. But I wonder if it wouldn't be simpler for the Tegra WDT driver to just call a function on the Tegra clocksource driver to find out which timer ID(s) to avoid using? Even simpler would be to just put a comment in the WDT driver saying that timer 5 was chosen arbitrarily, but if it's changed make sure not to conflict with the clocksource driver (and an equivalent change to the clocksource driver). -- 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
