* [PATCH v3] ARM: dts: qcom: ipq4019: fix high resolution timer
@ 2019-06-20 16:13 Christian Lamparter
2019-06-24 12:09 ` Sricharan R
0 siblings, 1 reply; 2+ messages in thread
From: Christian Lamparter @ 2019-06-20 16:13 UTC (permalink / raw)
To: linux-arm-msm
Cc: David Brown, Andy Gross, Marc Gonzalez, Bjorn Andersson,
Pavel Kubelun, Sricharan R
From: Abhishek Sahu <absahu@codeaurora.org>
The kernel is not switching the timer to the high resolution
mode and clock source keeps operating in with a just a lousy
10ms resolution.
The always-on property needs to be given for xo clock source
(which is the sole external oscillator) in the device tree
node to get to the 1ns high resolution mode.
Signed-off-by: Abhishek Sahu <absahu@codeaurora.org>
Signed-off-by: Pavel Kubelun <be.dissent@gmail.com>
Signed-off-by: Christian Lamparter <chunkeey@gmail.com>
---
v3: fixed empty line, removed changeid reference and fluff,
reworded message.
v2: fixed subject [Abhishek Sahu is bouncing]
---
arch/arm/boot/dts/qcom-ipq4019.dtsi | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/arm/boot/dts/qcom-ipq4019.dtsi b/arch/arm/boot/dts/qcom-ipq4019.dtsi
index bbcb7db810f7..0e3e79442c50 100644
--- a/arch/arm/boot/dts/qcom-ipq4019.dtsi
+++ b/arch/arm/boot/dts/qcom-ipq4019.dtsi
@@ -169,6 +169,7 @@
<1 4 0xf08>,
<1 1 0xf08>;
clock-frequency = <48000000>;
+ always-on;
};
soc {
--
2.20.1
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH v3] ARM: dts: qcom: ipq4019: fix high resolution timer
2019-06-20 16:13 [PATCH v3] ARM: dts: qcom: ipq4019: fix high resolution timer Christian Lamparter
@ 2019-06-24 12:09 ` Sricharan R
0 siblings, 0 replies; 2+ messages in thread
From: Sricharan R @ 2019-06-24 12:09 UTC (permalink / raw)
To: Christian Lamparter, linux-arm-msm
Cc: David Brown, Andy Gross, Marc Gonzalez, Bjorn Andersson, Pavel Kubelun
Hi Christian,
On 6/20/2019 9:43 PM, Christian Lamparter wrote:
> From: Abhishek Sahu <absahu@codeaurora.org>
>
> The kernel is not switching the timer to the high resolution
> mode and clock source keeps operating in with a just a lousy
> 10ms resolution.
>
> The always-on property needs to be given for xo clock source
> (which is the sole external oscillator) in the device tree
> node to get to the 1ns high resolution mode.
>
> Signed-off-by: Abhishek Sahu <absahu@codeaurora.org>
> Signed-off-by: Pavel Kubelun <be.dissent@gmail.com>
> Signed-off-by: Christian Lamparter <chunkeey@gmail.com>
> ---
>
> v3: fixed empty line, removed changeid reference and fluff,
> reworded message.
>
> v2: fixed subject [Abhishek Sahu is bouncing]
> ---
> arch/arm/boot/dts/qcom-ipq4019.dtsi | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/arch/arm/boot/dts/qcom-ipq4019.dtsi b/arch/arm/boot/dts/qcom-ipq4019.dtsi
> index bbcb7db810f7..0e3e79442c50 100644
> --- a/arch/arm/boot/dts/qcom-ipq4019.dtsi
> +++ b/arch/arm/boot/dts/qcom-ipq4019.dtsi
> @@ -169,6 +169,7 @@
> <1 4 0xf08>,
> <1 1 0xf08>;
> clock-frequency = <48000000>;
> + always-on;
Acked-by: Sricharan R <sricharan@codeaurora.org>
Regards,
Sricharan
--
"QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation
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