From: Amit Kucheria <amit.kucheria@linaro.org>
To: linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org,
bjorn.andersson@linaro.org, andy.gross@linaro.org,
David Brown <david.brown@linaro.org>
Cc: devicetree@vger.kernel.org
Subject: [PATCHv1 1/2] arm64: dts: qcom: pms405: calibrate the VADC correctly
Date: Wed, 20 Mar 2019 19:09:57 +0530 [thread overview]
Message-ID: <08751dd65ad76558724ce4d495b2a85d7ea27ca5.1553088982.git.amit.kucheria@linaro.org> (raw)
In-Reply-To: <cover.1553088982.git.amit.kucheria@linaro.org>
In-Reply-To: <cover.1553088982.git.amit.kucheria@linaro.org>
Set the qcom,ratiometric property to make the VADC use the VDD reference
(1.875V) and GND for channel calibration of the temperature channels
instead of 1.25V. Allow a 200us delay between the AMUX configuration and
ADC starting conversion using qcom,hw-settle-time as described in
documentation.
Fixes: 041b9a7b9fdb ("arm64: dts: pms405: Export PMIC temperature to thermal framework")
Signed-off-by: Amit Kucheria <amit.kucheria@linaro.org>
---
arch/arm64/boot/dts/qcom/pms405.dtsi | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/arch/arm64/boot/dts/qcom/pms405.dtsi b/arch/arm64/boot/dts/qcom/pms405.dtsi
index 1bb836d1e8aa..8b6aa2334f56 100644
--- a/arch/arm64/boot/dts/qcom/pms405.dtsi
+++ b/arch/arm64/boot/dts/qcom/pms405.dtsi
@@ -110,16 +110,22 @@
xo_therm_100k_pu {
reg = <ADC5_XO_THERM_100K_PU>;
+ qcom,ratiometric;
+ qcom,hw-settle-time = <200>;
qcom,pre-scaling = <1 1>;
};
amux_thm1_100k_pu {
reg = <ADC5_AMUX_THM1_100K_PU>;
+ qcom,ratiometric;
+ qcom,hw-settle-time = <200>;
qcom,pre-scaling = <1 1>;
};
amux_thm3_100k_pu {
reg = <ADC5_AMUX_THM3_100K_PU>;
+ qcom,ratiometric;
+ qcom,hw-settle-time = <200>;
qcom,pre-scaling = <1 1>;
};
};
--
2.17.1
next prev parent reply other threads:[~2019-03-20 13:39 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-03-20 13:39 [PATCHv1 0/2] qcom: pms405: adc fixes Amit Kucheria
2019-03-20 13:39 ` Amit Kucheria [this message]
2019-03-20 13:39 ` [PATCHv1 2/2] arm64: dts: qcom: pms405: Rename adc outputs as per schematics Amit Kucheria
2019-04-26 21:08 ` [PATCHv1 0/2] qcom: pms405: adc fixes Amit Kucheria
2019-04-27 4:38 ` Bjorn Andersson
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=08751dd65ad76558724ce4d495b2a85d7ea27ca5.1553088982.git.amit.kucheria@linaro.org \
--to=amit.kucheria@linaro.org \
--cc=andy.gross@linaro.org \
--cc=bjorn.andersson@linaro.org \
--cc=david.brown@linaro.org \
--cc=devicetree@vger.kernel.org \
--cc=linux-arm-msm@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).