From: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
To: jic23@kernel.org, lars@metafoo.de, linux-iio@vger.kernel.org,
linux-amlogic@lists.infradead.org
Cc: knaack.h@gmx.de, linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org,
Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Subject: [PATCH for-5.9] iio: adc: meson-saradc: Use the parent device to look up the calib data
Date: Sat, 15 Aug 2020 20:13:55 +0200 [thread overview]
Message-ID: <20200815181355.407034-1-martin.blumenstingl@googlemail.com> (raw)
On the older-gen 32-bit SoCs the meson-saradc driver is used to read the
SoC temperature. This requires reading calibration data from the eFuse.
Looking up the calibration data nvmem-cell requires the OF device_node
pointer to be available in the struct device which is passed to
devm_nvmem_cell_get(). This however got lost with commit 8cb631ccbb1952
("iio: Remove superfluous of_node assignments") from indio_dev->dev. As
devm_nvmem_cell_get() is called in the initialization phase the
device_node is not yet available because the NVMEM cell is looked up
before iio_device_register() is called (which would then set the
device_node automatically).
Use the parent device to look up the NVMEM cell instead to fix this
issue.
Fixes: 8cb631ccbb1952 ("iio: Remove superfluous of_node assignments")
Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
---
drivers/iio/adc/meson_saradc.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/iio/adc/meson_saradc.c b/drivers/iio/adc/meson_saradc.c
index 93c2252c0b89..1a9189ba69ae 100644
--- a/drivers/iio/adc/meson_saradc.c
+++ b/drivers/iio/adc/meson_saradc.c
@@ -707,7 +707,7 @@ static int meson_sar_adc_temp_sensor_init(struct iio_dev *indio_dev)
size_t read_len;
int ret;
- temperature_calib = devm_nvmem_cell_get(&indio_dev->dev,
+ temperature_calib = devm_nvmem_cell_get(indio_dev->dev.parent,
"temperature_calib");
if (IS_ERR(temperature_calib)) {
ret = PTR_ERR(temperature_calib);
--
2.28.0
next reply other threads:[~2020-08-15 21:53 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-08-15 18:13 Martin Blumenstingl [this message]
2020-08-22 10:40 ` [PATCH for-5.9] iio: adc: meson-saradc: Use the parent device to look up the calib data Jonathan Cameron
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