This is a note to let you know that I've just added the patch titled
iio: temperature: mlx90632 Relax the compatibility check
to my staging git tree which can be found at git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging.git in the staging-linus 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 hopefully also be merged in Linus's tree for the next -rc kernel release.
If you have any questions about this process, please let me know.
From 389fc70b60f534d679aea9a3f05146040ce20d77 Mon Sep 17 00:00:00 2001
From: Crt Mori cmo@melexis.com Date: Thu, 23 May 2019 14:07:22 +0200 Subject: iio: temperature: mlx90632 Relax the compatibility check
Register EE_VERSION contains mixture of calibration information and DSP version. So far, because calibrations were definite, the driver compatibility depended on whole contents, but in the newer production process the calibration part changes. Because of that, value in EE_VERSION will be changed and to avoid that calibration value is same as DSP version the MSB in calibration part was fixed to 1. That means existing calibrations (medical and consumer) will now have hex values (bits 8 to 15) of 83 and 84 respectively. Driver compatibility should be based only on DSP version part of the EE_VERSION (bits 0 to 7) register.
Signed-off-by: Crt Mori cmo@melexis.com Cc: Stable@vger.kernel.org Signed-off-by: Jonathan Cameron Jonathan.Cameron@huawei.com --- drivers/iio/temperature/mlx90632.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-)
diff --git a/drivers/iio/temperature/mlx90632.c b/drivers/iio/temperature/mlx90632.c index be03be719efe..eaca6ba06864 100644 --- a/drivers/iio/temperature/mlx90632.c +++ b/drivers/iio/temperature/mlx90632.c @@ -81,6 +81,8 @@ /* Magic constants */ #define MLX90632_ID_MEDICAL 0x0105 /* EEPROM DSPv5 Medical device id */ #define MLX90632_ID_CONSUMER 0x0205 /* EEPROM DSPv5 Consumer device id */ +#define MLX90632_DSP_VERSION 5 /* DSP version */ +#define MLX90632_DSP_MASK GENMASK(7, 0) /* DSP version in EE_VERSION */ #define MLX90632_RESET_CMD 0x0006 /* Reset sensor (address or global) */ #define MLX90632_REF_12 12LL /**< ResCtrlRef value of Ch 1 or Ch 2 */ #define MLX90632_REF_3 12LL /**< ResCtrlRef value of Channel 3 */ @@ -667,10 +669,13 @@ static int mlx90632_probe(struct i2c_client *client, } else if (read == MLX90632_ID_CONSUMER) { dev_dbg(&client->dev, "Detected Consumer EEPROM calibration %x\n", read); + } else if ((read & MLX90632_DSP_MASK) == MLX90632_DSP_VERSION) { + dev_dbg(&client->dev, + "Detected Unknown EEPROM calibration %x\n", read); } else { dev_err(&client->dev, - "EEPROM version mismatch %x (expected %x or %x)\n", - read, MLX90632_ID_CONSUMER, MLX90632_ID_MEDICAL); + "Wrong DSP version %x (expected %x)\n", + read, MLX90632_DSP_VERSION); return -EPROTONOSUPPORT; }