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bh=lm0BxjCjfCkRl1JbPIp6Z4LxVXg7sLgdMNJO9XHpTAg=; b=VYtyKf843P7EVGIShIRpS4ELubeLGe+TwHyENeZSfe2WYxGOXqF4FDQ5Ln7S+wqLeR+Peh eQEnNBr4rrXFGjwSbiRema6yrz/8u7Osq+fz4ZDvaShB8/Bj+Yt5arRfo6aoDNcz0FC+wi X6VlG4hJJZwghVGcpu6orij8wcbDV2qTcuFY7qrH8V1QZq5cDqIOyg+Bn9pql+lX9jwxlZ siIToRMP3i72e0jtfttPuekSLZePursDsq8L7CtrmFfZYSWOlvmLCbsKJhnPT+xtQYsT7u IYzgCzoPYyMrLU1lr7FiDn/bj20Qn5mt7MN4juvMskGW6zAuxhxXqI64Ngks6w== From: Antony Kurniawan Soemardi Subject: [PATCH 1/2] ARM: dts: qcom: pm8921: add labels for ADC channels Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20260326-pm8xxx-xoadc-label-v1-1-027805dad4db@smankusors.com> References: <20260326-pm8xxx-xoadc-label-v1-0-027805dad4db@smankusors.com> In-Reply-To: <20260326-pm8xxx-xoadc-label-v1-0-027805dad4db@smankusors.com> To: Bjorn Andersson , Konrad Dybcio , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Jonathan Cameron , David Lechner , =?utf-8?q?Nuno_S=C3=A1?= , Andy Shevchenko Cc: linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-iio@vger.kernel.org, phone-devel@vger.kernel.org, Antony Kurniawan Soemardi X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; 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This allows userspace and drivers to identify channels by name rather than relying on datasheet name. Signed-off-by: Antony Kurniawan Soemardi Acked-by: Konrad Dybcio --- arch/arm/boot/dts/qcom/pm8921.dtsi | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/arch/arm/boot/dts/qcom/pm8921.dtsi b/arch/arm/boot/dts/qcom/pm= 8921.dtsi index 535cb6a2543f69bc30abc89bff4e14a19147ce38..15246f4bd2672ccd4fc3359b665= 41d53d4da88b4 100644 --- a/arch/arm/boot/dts/qcom/pm8921.dtsi +++ b/arch/arm/boot/dts/qcom/pm8921.dtsi @@ -75,50 +75,62 @@ pm8921_xoadc: xoadc@197 { =20 vcoin: adc-channel@0 { reg =3D <0x00 0x00>; + label =3D "vcoin"; }; =20 vbat: adc-channel@1 { reg =3D <0x00 0x01>; + label =3D "vbat"; }; =20 dcin: adc-channel@2 { reg =3D <0x00 0x02>; + label =3D "dcin"; }; =20 vph_pwr: adc-channel@4 { reg =3D <0x00 0x04>; + label =3D "vph_pwr"; }; =20 batt_therm: adc-channel@8 { reg =3D <0x00 0x08>; + label =3D "batt_therm"; }; =20 batt_id: adc-channel@9 { reg =3D <0x00 0x09>; + label =3D "batt_id"; }; =20 usb_vbus: adc-channel@a { reg =3D <0x00 0x0a>; + label =3D "usb_vbus"; }; =20 die_temp: adc-channel@b { reg =3D <0x00 0x0b>; + label =3D "die_temp"; }; =20 ref_625mv: adc-channel@c { reg =3D <0x00 0x0c>; + label =3D "ref_625mv"; }; =20 ref_1250mv: adc-channel@d { reg =3D <0x00 0x0d>; + label =3D "ref_1250mv"; }; =20 chg_temp: adc-channel@e { reg =3D <0x00 0x0e>; + label =3D "chg_temp"; }; =20 ref_muxoff: adc-channel@f { reg =3D <0x00 0x0f>; + label =3D "ref_muxoff"; }; }; }; --=20 2.34.1 From nobody Thu Apr 2 23:57:10 2026 Received: from seahorse.cherry.relay.mailchannels.net (seahorse.cherry.relay.mailchannels.net [23.83.223.161]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id A8D943264CF; Wed, 25 Mar 2026 21:02:57 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=pass smtp.client-ip=23.83.223.161 ARC-Seal: i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774472579; cv=pass; b=l5q+lulnkphMAvT0Zy3TAD7nXDHLLkkugNH07EEdtVmGFpPsZU6gpdvXX18hwNCT2CYnFusUehN+He/Us+vSfDbBcEUaveeP8C5/i9EWKRUtcsiU225n70N5jjr2wWxU1CVt2IXZ2UPy9dOv521PPDROQaH1iHqAHlRZtPW86XE= ARC-Message-Signature: i=2; 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a=ed25519; pk=65wTy06fJl2/h/EJwjr704YG+yjHFhZObJBWzzK+N00= Date: Wed, 25 Mar 2026 21:02:41 +0000 (UTC) X-CM-Analysis: v=2.4 cv=ZbRPNdVA c=1 sm=1 tr=0 ts=69c44d74 a=9XgiG0qChrIWxZZBWkq1Wg==:117 a=9XgiG0qChrIWxZZBWkq1Wg==:17 a=IkcTkHD0fZMA:10 a=wxLWbCv9AAAA:8 a=RWyRNVyMI2VXGFIsuXIA:9 a=QEXdDO2ut3YA:10 a=QJY96suAAestDpCc5Gi9:22 X-CM-Envelope: MS4xfBpu3bqCbsmxYLh78dMcG4AV1MA54gfC0hSbDWZtivQrp4wq9ivNDacoMYBVdlFkTf+wRQy2AjtKuyQOhabmGz74eKEmWy0h/0gHtUDnjJCqyoJUxZyX bTC0aGG6V+yPLtt7l3u9l2py7ajAn5zD7jdj+PusFWSP6N5p90vbQcwgi5nSWCZNFf+ABZbLAUXSM0IWdUP26yQu3zGFE4DeASyqTZK6UE81wOs26v7199sD dwh+W82tryWgYT3FMw+PNqvT+BazBPVtvs1ffwz5KZ7IOjzg51ZhWogH7OA2bsStbqigY4F2hG+cJDMnQHvJAhCaKkZcTrc3mohiZlBj0sS4KXvZ5/L5do9D jB5fjtPgQ/BhG591C7/lVrFWAc/3l5qjMpX5+CXQmRhPnvNS9yEt8AZNy8/+aMrRjbA5GN5SzXpLULN06ZvJLPrtQGDZ3CwZr7bMsXGqADLMDGQXW4oTgKUP 56lGO/MW6Z/AmVxQAxl8wvZFGPdv10Zl5BBm1DvGWAO7h+lnBz4CRzT3Q/Wo6tDPqSd0VbMKp4YS5EEOaKwUSs47DTPYMVE1Gt8P8LGZPVAtqy1i2C95SgUp IWNYVcg4syd+C14Ue2/qm9fl5LWVfyrp5eiWMz7u0w1aWRH5e/1J5QQw78EpKsnzWLU= X-AuthUser: linux@smankusors.com Implement the .read_label callback to allow userspace to identify ADC channels via the "label" property in the device tree. The name field in pm8xxx_chan_info is renamed to label to better reflect its purpose. If no label is provided in the device tree, it defaults to the hardware datasheet name. Tested-on: Sony Xperia SP (PM8921) Signed-off-by: Antony Kurniawan Soemardi --- drivers/iio/adc/qcom-pm8xxx-xoadc.c | 26 +++++++++++++++++++++----- 1 file changed, 21 insertions(+), 5 deletions(-) diff --git a/drivers/iio/adc/qcom-pm8xxx-xoadc.c b/drivers/iio/adc/qcom-pm8= xxx-xoadc.c index 31f88cf7f7f18297132d152648b312c0fb60608e..206a379ea74113264d4e5e75a81= f838204174700 100644 --- a/drivers/iio/adc/qcom-pm8xxx-xoadc.c +++ b/drivers/iio/adc/qcom-pm8xxx-xoadc.c @@ -369,7 +369,7 @@ static const struct xoadc_channel pm8921_xoadc_channels= [] =3D { =20 /** * struct pm8xxx_chan_info - ADC channel information - * @name: name of this channel + * @label: label of this channel from device tree (defaults to datasheet n= ame if not specified) * @hwchan: pointer to hardware channel information (muxing & scaling sett= ings) * @calibration: whether to use absolute or ratiometric calibration * @decimation: 0,1,2,3 @@ -377,7 +377,7 @@ static const struct xoadc_channel pm8921_xoadc_channels= [] =3D { * calibration: 0, 1, 2, 4, 5. */ struct pm8xxx_chan_info { - const char *name; + const char *label; const struct xoadc_channel *hwchan; enum vadc_calibration calibration; u8 decimation:2; @@ -446,7 +446,7 @@ static int pm8xxx_read_channel_rsv(struct pm8xxx_xoadc = *adc, u8 lsb, msb; =20 dev_dbg(adc->dev, "read channel \"%s\", amux %d, prescale/mux: %d, rsv %d= \n", - ch->name, ch->hwchan->amux_channel, ch->hwchan->pre_scale_mux, rsv); + ch->label, ch->hwchan->amux_channel, ch->hwchan->pre_scale_mux, rsv); =20 mutex_lock(&adc->lock); =20 @@ -725,8 +725,22 @@ static int pm8xxx_fwnode_xlate(struct iio_dev *indio_d= ev, return -EINVAL; } =20 +static int pm8xxx_read_label(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, char *label) +{ + struct pm8xxx_xoadc *adc =3D iio_priv(indio_dev); + struct pm8xxx_chan_info *ch =3D pm8xxx_get_channel(adc, chan->address); + + if (!ch) { + dev_err(adc->dev, "no such channel %lu\n", chan->address); + return -EINVAL; + } + return sysfs_emit(label, "%s\n", ch->label); +} + static const struct iio_info pm8xxx_xoadc_info =3D { .fwnode_xlate =3D pm8xxx_fwnode_xlate, + .read_label =3D pm8xxx_read_label, .read_raw =3D pm8xxx_read_raw, }; =20 @@ -770,7 +784,9 @@ static int pm8xxx_xoadc_parse_channel(struct device *de= v, pre_scale_mux, amux_channel); return -EINVAL; } - ch->name =3D name; + ret =3D fwnode_property_read_string(fwnode, "label", &ch->label); + if (ret) + ch->label =3D hwchan->datasheet_name; ch->hwchan =3D hwchan; /* Everyone seems to use absolute calibration except in special cases */ ch->calibration =3D VADC_CALIB_ABSOLUTE; @@ -812,7 +828,7 @@ static int pm8xxx_xoadc_parse_channel(struct device *de= v, =20 dev_dbg(dev, "channel [PRESCALE/MUX: %02x AMUX: %02x] \"%s\" ref voltage: %d, decimat= ion %d prescale %d/%d, scale function %d\n", - hwchan->pre_scale_mux, hwchan->amux_channel, ch->name, + hwchan->pre_scale_mux, hwchan->amux_channel, ch->label, ch->amux_ip_rsv, ch->decimation, hwchan->prescale.numerator, hwchan->prescale.denominator, hwchan->scale_fn_type); =20 --=20 2.34.1