[PATCH 1/2] iio: accel: adxl367: fix DEVID read after reset

[PATCH 1/2] iio: accel: adxl367: fix DEVID read after reset

[Cosmin Tanislav]

regmap_read_poll_timeout() will not sleep before reading,
causing the first read to return -ENXIO on I2C, since the
chip does not respond to it while it is being reset.

The datasheet specifies that a soft reset operation has a
latency of 7.5ms.

Add a 15ms sleep between reset and reading the DEVID register,
and switch to a simple regmap_read() call.

Signed-off-by: Cosmin Tanislav <demonsingur@gmail.com>
---
 drivers/iio/accel/adxl367.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/drivers/iio/accel/adxl367.c b/drivers/iio/accel/adxl367.c
index 834ee6d63947..210228affb80 100644
--- a/drivers/iio/accel/adxl367.c
+++ b/drivers/iio/accel/adxl367.c
@@ -1368,9 +1368,11 @@ static int adxl367_verify_devid(struct adxl367_state *st)
 	unsigned int val;
 	int ret;
 
-	ret = regmap_read_poll_timeout(st->regmap, ADXL367_REG_DEVID, val,
-				       val == ADXL367_DEVID_AD, 1000, 10000);
+	ret = regmap_read(st->regmap, ADXL367_REG_DEVID, &val);
 	if (ret)
+		return dev_err_probe(st->dev, ret, "Failed to read dev id\n");
+
+	if (val != ADXL367_DEVID_AD)
 		return dev_err_probe(st->dev, -ENODEV,
 				     "Invalid dev id 0x%02X, expected 0x%02X\n",
 				     val, ADXL367_DEVID_AD);
@@ -1449,6 +1451,8 @@ int adxl367_probe(struct device *dev, const struct adxl367_ops *ops,
 	if (ret)
 		return ret;
 
+	fsleep(15000);
+
 	ret = adxl367_verify_devid(st);
 	if (ret)
 		return ret;
-- 
2.43.0

[PATCH 2/2] iio: accel: adxl367: fix I2C FIFO data register

[Cosmin Tanislav]

As specified in the datasheet, the I2C FIFO data register is
0x18, not 0x42. 0x42 was used by mistake when adapting the
ADXL372 driver.

Fix this mistake.

Signed-off-by: Cosmin Tanislav <demonsingur@gmail.com>
---
 drivers/iio/accel/adxl367_i2c.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/iio/accel/adxl367_i2c.c b/drivers/iio/accel/adxl367_i2c.c
index b595fe94f3a3..62c74bdc0d77 100644
--- a/drivers/iio/accel/adxl367_i2c.c
+++ b/drivers/iio/accel/adxl367_i2c.c
@@ -11,7 +11,7 @@
 
 #include "adxl367.h"
 
-#define ADXL367_I2C_FIFO_DATA	0x42
+#define ADXL367_I2C_FIFO_DATA	0x18
 
 struct adxl367_i2c_state {
 	struct regmap *regmap;
-- 
2.43.0

Re: [PATCH 2/2] iio: accel: adxl367: fix I2C FIFO data register

[Nuno Sá]

On Wed, 2024-02-07 at 05:36 +0200, Cosmin Tanislav wrote:
> As specified in the datasheet, the I2C FIFO data register is
> 0x18, not 0x42. 0x42 was used by mistake when adapting the
> ADXL372 driver.
> 
> Fix this mistake.
> 
> Signed-off-by: Cosmin Tanislav <demonsingur@gmail.com>
> ---

This needs a Fixes: tag. With that:

Reviewed-by: Nuno Sa <nuno.sa@analog.com>

>  drivers/iio/accel/adxl367_i2c.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/iio/accel/adxl367_i2c.c b/drivers/iio/accel/adxl367_i2c.c
> index b595fe94f3a3..62c74bdc0d77 100644
> --- a/drivers/iio/accel/adxl367_i2c.c
> +++ b/drivers/iio/accel/adxl367_i2c.c
> @@ -11,7 +11,7 @@
>  
>  #include "adxl367.h"
>  
> -#define ADXL367_I2C_FIFO_DATA	0x42
> +#define ADXL367_I2C_FIFO_DATA	0x18
>  
>  struct adxl367_i2c_state {
>  	struct regmap *regmap;

Re: [PATCH 1/2] iio: accel: adxl367: fix DEVID read after reset

[Nuno Sá]

On Wed, 2024-02-07 at 05:36 +0200, Cosmin Tanislav wrote:
> regmap_read_poll_timeout() will not sleep before reading,
> causing the first read to return -ENXIO on I2C, since the
> chip does not respond to it while it is being reset.
> 
> The datasheet specifies that a soft reset operation has a
> latency of 7.5ms.
> 
> Add a 15ms sleep between reset and reading the DEVID register,
> and switch to a simple regmap_read() call.
> 
> Signed-off-by: Cosmin Tanislav <demonsingur@gmail.com>
> ---

This likely needs a Fixes: tag as well. With that,

Reviewed-by: Nuno Sa <nuno.sa@analog.com>

>  drivers/iio/accel/adxl367.c | 8 ++++++--
>  1 file changed, 6 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/iio/accel/adxl367.c b/drivers/iio/accel/adxl367.c
> index 834ee6d63947..210228affb80 100644
> --- a/drivers/iio/accel/adxl367.c
> +++ b/drivers/iio/accel/adxl367.c
> @@ -1368,9 +1368,11 @@ static int adxl367_verify_devid(struct adxl367_state
> *st)
>  	unsigned int val;
>  	int ret;
>  
> -	ret = regmap_read_poll_timeout(st->regmap, ADXL367_REG_DEVID, val,
> -				       val == ADXL367_DEVID_AD, 1000, 10000);
> +	ret = regmap_read(st->regmap, ADXL367_REG_DEVID, &val);
>  	if (ret)
> +		return dev_err_probe(st->dev, ret, "Failed to read dev
> id\n");
> +
> +	if (val != ADXL367_DEVID_AD)
>  		return dev_err_probe(st->dev, -ENODEV,
>  				     "Invalid dev id 0x%02X, expected
> 0x%02X\n",
>  				     val, ADXL367_DEVID_AD);
> @@ -1449,6 +1451,8 @@ int adxl367_probe(struct device *dev, const struct
> adxl367_ops *ops,
>  	if (ret)
>  		return ret;
>  
> +	fsleep(15000);
> +
>  	ret = adxl367_verify_devid(st);
>  	if (ret)
>  		return ret;

Re: [PATCH 2/2] iio: accel: adxl367: fix I2C FIFO data register

[Jonathan Cameron]

On Wed, 07 Feb 2024 10:08:38 +0100
Nuno Sá <noname.nuno@gmail.com> wrote:

> On Wed, 2024-02-07 at 05:36 +0200, Cosmin Tanislav wrote:
> > As specified in the datasheet, the I2C FIFO data register is
> > 0x18, not 0x42. 0x42 was used by mistake when adapting the
> > ADXL372 driver.
For future reference (not worth a v2): You could wrap a little longer - 75
chars is fine normally for commit messages.  
> > 
> > Fix this mistake.
> > 
> > Signed-off-by: Cosmin Tanislav <demonsingur@gmail.com>
> > ---  
> 
> This needs a Fixes: tag. With that:
> 
> Reviewed-by: Nuno Sa <nuno.sa@analog.com>
Fine to just reply to each of these emails with an appropriate
fixes tag - no need for a v2.


> 
> >  drivers/iio/accel/adxl367_i2c.c | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> > 
> > diff --git a/drivers/iio/accel/adxl367_i2c.c b/drivers/iio/accel/adxl367_i2c.c
> > index b595fe94f3a3..62c74bdc0d77 100644
> > --- a/drivers/iio/accel/adxl367_i2c.c
> > +++ b/drivers/iio/accel/adxl367_i2c.c
> > @@ -11,7 +11,7 @@
> >  
> >  #include "adxl367.h"
> >  
> > -#define ADXL367_I2C_FIFO_DATA	0x42
> > +#define ADXL367_I2C_FIFO_DATA	0x18
> >  
> >  struct adxl367_i2c_state {
> >  	struct regmap *regmap;  
> 

Re: [PATCH 2/2] iio: accel: adxl367: fix I2C FIFO data register

[Jonathan Cameron]

On Sat, 10 Feb 2024 16:57:47 +0000
Jonathan Cameron <jic23@kernel.org> wrote:

> On Wed, 07 Feb 2024 10:08:38 +0100
> Nuno Sá <noname.nuno@gmail.com> wrote:
> 
> > On Wed, 2024-02-07 at 05:36 +0200, Cosmin Tanislav wrote:  
> > > As specified in the datasheet, the I2C FIFO data register is
> > > 0x18, not 0x42. 0x42 was used by mistake when adapting the
> > > ADXL372 driver.  
> For future reference (not worth a v2): You could wrap a little longer - 75
> chars is fine normally for commit messages.  
> > > 
> > > Fix this mistake.
> > > 
> > > Signed-off-by: Cosmin Tanislav <demonsingur@gmail.com>
> > > ---    
> > 
> > This needs a Fixes: tag. With that:
> > 
> > Reviewed-by: Nuno Sa <nuno.sa@analog.com>  
> Fine to just reply to each of these emails with an appropriate
> fixes tag - no need for a v2.
> 
Given these were still in my queue waiting for a fixes tag,
I went looking.

Fixes: cbab791c5e2a ("iio: accel: add ADXL367 driver")

Both patches added and both applied to the fixes-togreg branch of iio.git

Thanks

Jonathan

> 
> >   
> > >  drivers/iio/accel/adxl367_i2c.c | 2 +-
> > >  1 file changed, 1 insertion(+), 1 deletion(-)
> > > 
> > > diff --git a/drivers/iio/accel/adxl367_i2c.c b/drivers/iio/accel/adxl367_i2c.c
> > > index b595fe94f3a3..62c74bdc0d77 100644
> > > --- a/drivers/iio/accel/adxl367_i2c.c
> > > +++ b/drivers/iio/accel/adxl367_i2c.c
> > > @@ -11,7 +11,7 @@
> > >  
> > >  #include "adxl367.h"
> > >  
> > > -#define ADXL367_I2C_FIFO_DATA	0x42
> > > +#define ADXL367_I2C_FIFO_DATA	0x18
> > >  
> > >  struct adxl367_i2c_state {
> > >  	struct regmap *regmap;    
> >   
> 
>