The timer fixed interval period pulse generator register is used to generate periodic pulses. The down count register loads the value programmed in the fixed period interval (FIPER). At every tick of the timer accumulator overflow, the counter decrements by the value of TMR_CTRL[TCLK_PERIOD]. It generates a pulse when the down counter value reaches zero. It reloads the down counter in the cycle following a pulse. To use the TMR_FIPER1 register to generate a 1 PPS event, the value (10^9 nanoseconds) - TCLK_PERIOD should be programmed. It should be 999999995 not 999999990 since TCLK_PERIOD is 5. Signed-off-by: Yangbo Lu <yangbo.lu@xxxxxxx> --- Changes for v2: - Added Shawn into cc list. --- arch/arm/boot/dts/ls1021a.dtsi | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/arm/boot/dts/ls1021a.dtsi b/arch/arm/boot/dts/ls1021a.dtsi index 64249726b3cb..a861a4b9e319 100644 --- a/arch/arm/boot/dts/ls1021a.dtsi +++ b/arch/arm/boot/dts/ls1021a.dtsi @@ -589,7 +589,7 @@ fsl,tclk-period = <5>; fsl,tmr-prsc = <2>; fsl,tmr-add = <0xaaaaaaab>; - fsl,tmr-fiper1 = <999999990>; + fsl,tmr-fiper1 = <999999995>; fsl,tmr-fiper2 = <99990>; fsl,max-adj = <499999999>; }; -- 2.14.1 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
