This is a note to let you know that I've just added the patch titled

iio: adc: ti-adc081c: Partial revert of removal of ACPI IDs

to my char-misc git tree which can be found at git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc.git in the char-misc-testing branch.

The patch will show up in the next release of the linux-next tree (usually sometime within the next 24 hours during the week.)

The patch will be merged to the char-misc-next branch sometime soon, after it passes testing, and the merge window is open.

If you have any questions about this process, please let me know.

From c9791a94384af07592d29504004d2255dbaf8663 Mon Sep 17 00:00:00 2001

From: Jonathan Cameron Jonathan.Cameron@huawei.com Date: Sun, 5 Dec 2021 17:27:28 +0000 Subject: iio: adc: ti-adc081c: Partial revert of removal of ACPI IDs

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@aaeon.com.tw Fixes: c458b7ca3fd0 ("iio:adc:ti-adc081c: Drop ACPI ids that seem very unlikely to be official.") Signed-off-by: Jonathan Cameron Jonathan.Cameron@huawei.com Cc: Andy Shevchenko andy.shevchenko@gmail.com Tested-by: Kunyang Fan Kunyang_Fan@aaeon.com.tw #UP-extremei11 Link: https://lore.kernel.org/r/20211205172728.2826512-1-jic23@kernel.org Cc: Stable@vger.kernel.org --- 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,