From: kholk11@gmail.com
To: agross@kernel.org
Cc: bjorn.andersson@linaro.org, jic23@kernel.org, robh+dt@kernel.org,
kholk11@gmail.com, marijns95@gmail.com, konradybcio@gmail.com,
martin.botka1@gmail.com, linux-arm-msm@vger.kernel.org,
phone-devel@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH 1/2] iio: adc: qcom-spmi-vadc: Use right ratiometric range for 8998,660,845
Date: Sat, 26 Sep 2020 15:10:08 +0200 [thread overview]
Message-ID: <20200926131009.14483-1-kholk11@gmail.com> (raw)
From: AngeloGioacchino Del Regno <kholk11@gmail.com>
The ratiometric range for MSM8998, SDM630/636/660 and SDM845 is 1875mV
instead of the standard 1800mV: address this by adding a new compatible
"qcom,spmi-vadc-8998" and assigning the different range to the machines
declaring this one.
Signed-off-by: AngeloGioacchino Del Regno <kholk11@gmail.com>
---
drivers/iio/adc/qcom-spmi-vadc.c | 10 +++++++++-
drivers/iio/adc/qcom-vadc-common.h | 1 +
2 files changed, 10 insertions(+), 1 deletion(-)
diff --git a/drivers/iio/adc/qcom-spmi-vadc.c b/drivers/iio/adc/qcom-spmi-vadc.c
index b0388f8a69f4..59a94ea7bf78 100644
--- a/drivers/iio/adc/qcom-spmi-vadc.c
+++ b/drivers/iio/adc/qcom-spmi-vadc.c
@@ -101,6 +101,7 @@ struct vadc_channel_prop {
* @dev: pointer to struct device.
* @base: base address for the ADC peripheral.
* @nchannels: number of VADC channels.
+ * @ratio_range: ratiometric range for ref points.
* @chan_props: array of VADC channel properties.
* @iio_chans: array of IIO channels specification.
* @are_ref_measured: are reference points measured.
@@ -114,6 +115,7 @@ struct vadc_priv {
struct device *dev;
u16 base;
unsigned int nchannels;
+ unsigned int ratio_range;
struct vadc_channel_prop *chan_props;
struct iio_chan_spec *iio_chans;
bool are_ref_measured;
@@ -355,7 +357,7 @@ static int vadc_measure_ref_points(struct vadc_priv *vadc)
u16 read_1, read_2;
int ret;
- vadc->graph[VADC_CALIB_RATIOMETRIC].dx = VADC_RATIOMETRIC_RANGE;
+ vadc->graph[VADC_CALIB_RATIOMETRIC].dx = vadc->ratio_range;
vadc->graph[VADC_CALIB_ABSOLUTE].dx = VADC_ABSOLUTE_RANGE_UV;
prop = vadc_get_channel(vadc, VADC_REF_1250MV);
@@ -885,6 +887,11 @@ static int vadc_probe(struct platform_device *pdev)
if (ret)
return ret;
+ if (of_device_is_compatible(node, "qcom,spmi-vadc-8998"))
+ vadc->ratio_range = VADC_RATIOMETRIC_RANGE_8998;
+ else
+ vadc->ratio_range = VADC_RATIOMETRIC_RANGE;
+
irq_eoc = platform_get_irq(pdev, 0);
if (irq_eoc < 0) {
if (irq_eoc == -EPROBE_DEFER || irq_eoc == -EINVAL)
@@ -918,6 +925,7 @@ static int vadc_probe(struct platform_device *pdev)
static const struct of_device_id vadc_match_table[] = {
{ .compatible = "qcom,spmi-vadc" },
+ { .compatible = "qcom-spmi-vadc-8998" },
{ }
};
MODULE_DEVICE_TABLE(of, vadc_match_table);
diff --git a/drivers/iio/adc/qcom-vadc-common.h b/drivers/iio/adc/qcom-vadc-common.h
index 17b2fc4d8bf2..b10d5fd59034 100644
--- a/drivers/iio/adc/qcom-vadc-common.h
+++ b/drivers/iio/adc/qcom-vadc-common.h
@@ -16,6 +16,7 @@
#define VADC_ABSOLUTE_RANGE_UV 625000
#define VADC_RATIOMETRIC_RANGE 1800
+#define VADC_RATIOMETRIC_RANGE_8998 1875
#define VADC_DEF_PRESCALING 0 /* 1:1 */
#define VADC_DEF_DECIMATION 0 /* 512 */
--
2.28.0
next reply other threads:[~2020-09-26 13:10 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-26 13:10 kholk11 [this message]
2020-09-26 13:10 ` [PATCH 2/2] dt-bindings: qcom-spmi-vadc: Document qcom,spmi-vadc-8998 compatible kholk11
2020-09-26 16:28 ` [PATCH 1/2] iio: adc: qcom-spmi-vadc: Use right ratiometric range for 8998,660,845 Jonathan Cameron
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