| Simon Arlott | ee4af56 | 2012-09-10 22:38:35 -0600 | [diff] [blame^] | 1 | BCM2835 System Timer |
| 2 | |
| 3 | The System Timer peripheral provides four 32-bit timer channels and a |
| 4 | single 64-bit free running counter. Each channel has an output compare |
| 5 | register, which is compared against the 32 least significant bits of the |
| 6 | free running counter values, and generates an interrupt. |
| 7 | |
| 8 | Required properties: |
| 9 | |
| 10 | - compatible : should be "brcm,bcm2835-system-timer.txt" |
| 11 | - reg : Specifies base physical address and size of the registers. |
| 12 | - interrupts : A list of 4 interrupt sinks; one per timer channel. |
| 13 | - clock-frequency : The frequency of the clock that drives the counter, in Hz. |
| 14 | |
| 15 | Example: |
| 16 | |
| 17 | timer { |
| 18 | compatible = "brcm,bcm2835-system-timer"; |
| 19 | reg = <0x7e003000 0x1000>; |
| 20 | interrupts = <1 0>, <1 1>, <1 2>, <1 3>; |
| 21 | clock-frequency = <1000000>; |
| 22 | }; |