Hi Jonathan,
This patch is looked good to me, and I used our product UP-extremei11 to verify ADC ADC081C function.
Thanks,
Kunyang
-----Original Message-----
From: Jonathan Cameron <jic23@xxxxxxxxxx>
Sent: Monday, December 6, 2021 1:27 AM
To: linux-iio@xxxxxxxxxxxxxxx
Cc: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx>; Kunyang Fan <Kunyang_Fan@xxxxxxxxxxxx>; Andy Shevchenko <andy.shevchenko@xxxxxxxxx>
Subject: [PATCH v2] iio: adc: ti-adc081c: Partial revert of removal of ACPI IDs
From: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx>
Unfortuanately a non standards compliant ACPI ID is known to be in the wild on some AAEON boards.
Partly revert the removal of these IDs so that ADC081C will again work + add a comment to that affect for future reference.
Whilst here use generic firmware properties rather than the ACPI specific handling previously found in this driver.
Reported-by: Kunyang Fan <Kunyang_Fan@xxxxxxxxxxxx>
Fixes: c458b7ca3fd0 ("iio:adc:ti-adc081c: Drop ACPI ids that seem very unlikely to be official.")
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx>
Cc: Andy Shevchenko <andy.shevchenko@xxxxxxxxx>
---
Looking ideally for a tested-by for this from Kunyang Fan.
v2: Use generic firmware properties as Andy Shevchenko rightly suggested.
I took it a bit further than strictly necessary as I don't like putting enums in the driver_data only to use them to index a table when we could just use the pointers directly.
Note this driver does have device tree binding documentation but that's a job for another day. Or maybe later today if I get really bored this evening :)
drivers/iio/adc/ti-adc081c.c | 22 +++++++++++++++++-----
1 file changed, 17 insertions(+), 5 deletions(-)
diff --git a/drivers/iio/adc/ti-adc081c.c b/drivers/iio/adc/ti-adc081c.c index 16fc608db36a..bd48b073e720 100644
--- a/drivers/iio/adc/ti-adc081c.c
+++ b/drivers/iio/adc/ti-adc081c.c
@@ -19,6 +19,7 @@
#include <linux/i2c.h>
#include <linux/module.h>
#include <linux/mod_devicetable.h>
+#include <linux/property.h>
#include <linux/iio/iio.h>
#include <linux/iio/buffer.h>
@@ -156,13 +157,16 @@ static int adc081c_probe(struct i2c_client *client, {
struct iio_dev *iio;
struct adc081c *adc;
- struct adcxx1c_model *model;
+ const struct adcxx1c_model *model;
int err;
if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_WORD_DATA))
return -EOPNOTSUPP;
- model = &adcxx1c_models[id->driver_data];
+ if (dev_fwnode(&client->dev))
+ model = device_get_match_data(&client->dev);
+ else
+ model = &adcxx1c_models[id->driver_data];
iio = devm_iio_device_alloc(&client->dev, sizeof(*adc));
if (!iio)
@@ -210,10 +214,17 @@ static const struct i2c_device_id adc081c_id[] = { }; MODULE_DEVICE_TABLE(i2c, adc081c_id);
+static const struct acpi_device_id adc081c_acpi_match[] = {
+ /* Used on some AAEON boards */
+ { "ADC081C", (kernel_ulong_t)&adcxx1c_models[ADC081C] },
+ { }
+};
+MODULE_DEVICE_TABLE(acpi, adc081c_acpi_match);
+
static const struct of_device_id adc081c_of_match[] = {
- { .compatible = "ti,adc081c" },
- { .compatible = "ti,adc101c" },
- { .compatible = "ti,adc121c" },
+ { .compatible = "ti,adc081c", .data = &adcxx1c_models[ADC081C] },
+ { .compatible = "ti,adc101c", .data = &adcxx1c_models[ADC101C] },
+ { .compatible = "ti,adc121c", .data = &adcxx1c_models[ADC121C] },
{ }
};
MODULE_DEVICE_TABLE(of, adc081c_of_match); @@ -222,6 +233,7 @@ static struct i2c_driver adc081c_driver = {
.driver = {
.name = "adc081c",
.of_match_table = adc081c_of_match,
+ .acpi_match_table = adc081c_acpi_match,
},
.probe = adc081c_probe,
.id_table = adc081c_id,
--
2.34.1
<p></p>
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