Thread (4 messages) 4 messages, 2 authors, 2017-12-20

[v2] arm: dts: ls1021a: fix the value of TMR_FIPER1

From: yangbo.lu@nxp.com (Y.b. Lu)
Date: 2017-12-18 02:51:11
Also in: linux-devicetree, lkml

Hi Shawn,

Sorry for bother. I just couldn?t find this patch on your git tree.
Could you help to check?
Thanks a lot.

Best regards,
Yangbo Lu
-----Original Message-----
From: Shawn Guo [mailto:shawnguo at kernel.org]
Sent: 2017?11?30? 8:29
To: Y.b. Lu <yangbo.lu@nxp.com>
Cc: devicetree at vger.kernel.org; linux-kernel at vger.kernel.org;
linux-arm-kernel at lists.infradead.org; Mark Rutland [off-list ref];
Rob Herring [off-list ref]; Russell King [off-list ref]
Subject: Re: [v2] arm: dts: ls1021a: fix the value of TMR_FIPER1

On Wed, Nov 29, 2017 at 02:54:58PM +0800, Yangbo Lu wrote:
quoted
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@nxp.com>

Again, for arm dts, we usually use prefix like 'ARM: dts: ...'

I fixed it up and applied the patch.

Shawn
quoted
---
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


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