clocksource: dw_apb_timer: special variant for rockchip rk3188 timers
From: Heiko Stuebner <heiko@...> Date: Thu, 27 Jun 2013 17:49:49 +0200
Commit-Message
The rk3188 uses a variant of the timer containing two registers for load_count and current_values. Signed-off-by: Heiko Stuebner <heiko@...>
Patch-Comment
.../bindings/arm/rockchip/rk3188-timer.txt | 20 ++++++++++++++++++++ drivers/clocksource/dw_apb_timer_of.c | 6 ++++++ 2 files changed, 26 insertions(+) create mode 100644 Documentation/devicetree/bindings/arm/rockchip/rk3188-timer.txt
Statistics
- 26 lines added
- 0 lines removed
Changes
------- Documentation/devicetree/bindings/arm/rockchip/rk3188-timer.txt --------
new file mode 100644
index 0000000..ccbb389
@@ -0,0 +1,20 @@
+Rockchip rk3188 timer:
+----------------------
+
+The rk3188 SoCs contain a slightly modified dw-apb-timer.
+
+Required node properties:
+- compatible value : = "rockchip,rk3188-dw-apb-timer-osc";
+
+For the other properties see the generic documentation in
+../../rtc/dw-apb.txt
+
+Example:
+
+ timer3: timer@ffe00000 {
+ compatible = "rockchip,rk3188-dw-apb-timer-osc";
+ interrupts = <0 170 4>;
+ reg = <0xffe00000 0x1000>;
+ clocks = <&timer_clk>, <&timer_pclk>;
+ clock-names = "timer", "pclk";
+ };
-------------------- drivers/clocksource/dw_apb_timer_of.c ---------------------
index 4bcc1c1..7824796 100644
@@ -38,6 +38,11 @@ static void timer_get_base_and_rate(struct device_node *np,
*quirks = 0;
+ if (of_device_is_compatible(np, "rockchip,rk3188-dw-apb-timer-osc"))
+ *quirks |= APBTMR_QUIRK_64BIT_COUNTER | APBTMR_QUIRK_NO_EOI |
+ APBTMR_QUIRK_INVERSE_INTMASK |
+ APBTMR_QUIRK_INVERSE_PERIODIC;
+
/*
* Not all implementations use a periphal clock, so don't panic
* if it's not present
@@ -165,3 +170,4 @@ static void __init dw_apb_timer_init(struct device_node *timer)
}
CLOCKSOURCE_OF_DECLARE(pc3x2_timer, "picochip,pc3x2-timer", dw_apb_timer_init);
CLOCKSOURCE_OF_DECLARE(apb_timer, "snps,dw-apb-timer-osc", dw_apb_timer_init);
+CLOCKSOURCE_OF_DECLARE(rk3188_timer, "rockchip,rk3188-dw-apb-timer-osc", dw_apb_timer_init);