Re: [PATCH 2/2] iio: imu: inv_icm42600: switch to use generic name irq get

[Jonathan Cameron <Jonathan.Cameron@huawei.com>]

On Fri, 04 Apr 2025 17:52:03 +0200
Jean-Baptiste Maneyrol via B4 Relay <devnull+jean-baptiste.maneyrol.tdk.com@kernel.org> wrote:

> From: Jean-Baptiste Maneyrol <jean-baptiste.maneyrol@tdk.com>
> 
> Use generic fwnode_irq_get_byname() for getting interrupt pin using
> interrupt name.
> Only INT1 is supported by the driver currently.
> ---
>  drivers/iio/imu/inv_icm42600/inv_icm42600.h      |  2 +-
>  drivers/iio/imu/inv_icm42600/inv_icm42600_core.c | 13 +++++++++++--
>  drivers/iio/imu/inv_icm42600/inv_icm42600_i2c.c  |  2 +-
>  drivers/iio/imu/inv_icm42600/inv_icm42600_spi.c  |  2 +-
>  4 files changed, 14 insertions(+), 5 deletions(-)
> 
> diff --git a/drivers/iio/imu/inv_icm42600/inv_icm42600.h b/drivers/iio/imu/inv_icm42600/inv_icm42600.h
> index 18787a43477b89db12caee597ab040af5c8f52d5..f893dbe6996506a33eb5d3be47e6765a923665c9 100644
> --- a/drivers/iio/imu/inv_icm42600/inv_icm42600.h
> +++ b/drivers/iio/imu/inv_icm42600/inv_icm42600.h
> @@ -426,7 +426,7 @@ int inv_icm42600_set_temp_conf(struct inv_icm42600_state *st, bool enable,
>  int inv_icm42600_debugfs_reg(struct iio_dev *indio_dev, unsigned int reg,
>  			     unsigned int writeval, unsigned int *readval);
>  
> -int inv_icm42600_core_probe(struct regmap *regmap, int chip, int irq,
> +int inv_icm42600_core_probe(struct regmap *regmap, int chip,
>  			    inv_icm42600_bus_setup bus_setup);
>  
>  struct iio_dev *inv_icm42600_gyro_init(struct inv_icm42600_state *st);
> diff --git a/drivers/iio/imu/inv_icm42600/inv_icm42600_core.c b/drivers/iio/imu/inv_icm42600/inv_icm42600_core.c
> index ef9875d3b79db116f9fb4f6d881a7979292c1792..bfdd7cd5fafae87ad7c6204f6dd3bef17935b3f9 100644
> --- a/drivers/iio/imu/inv_icm42600/inv_icm42600_core.c
> +++ b/drivers/iio/imu/inv_icm42600/inv_icm42600_core.c
> @@ -683,12 +683,13 @@ static void inv_icm42600_disable_pm(void *_data)
>  	pm_runtime_disable(dev);
>  }
>  
> -int inv_icm42600_core_probe(struct regmap *regmap, int chip, int irq,
> +int inv_icm42600_core_probe(struct regmap *regmap, int chip,
>  			    inv_icm42600_bus_setup bus_setup)
>  {
>  	struct device *dev = regmap_get_device(regmap);
>  	struct inv_icm42600_state *st;
> -	int irq_type;
> +	struct fwnode_handle *fwnode;
> +	int irq, irq_type;
>  	bool open_drain;
>  	int ret;
>  
> @@ -697,6 +698,14 @@ int inv_icm42600_core_probe(struct regmap *regmap, int chip, int irq,
>  		return -ENODEV;
>  	}
>  
> +	/* get INT1 only supported interrupt */
> +	fwnode = dev_fwnode(dev);
> +	if (!fwnode)
> +		return -ENODEV;
> +	irq = fwnode_irq_get_byname(fwnode, "INT1");
> +	if (irq < 0)
> +		return dev_err_probe(dev, irq, "error missing INT1 interrupt\n");
This needs to 'then' - possibly with a dev_info() - fallback to
using 
	fwnode_irq_get(fwnode, 0);
to get what would have previously been in spi->irq , i2c->irq etc
as I assume there is DT out in the wild without the names provided.

Jonathan

> +
>  	irq_type = irq_get_trigger_type(irq);
>  	if (!irq_type)
>  		irq_type = IRQF_TRIGGER_FALLING;
> diff --git a/drivers/iio/imu/inv_icm42600/inv_icm42600_i2c.c b/drivers/iio/imu/inv_icm42600/inv_icm42600_i2c.c
> index 04e440fe023aa3869529b0f0be003ea0544bfb8d..38cc0d7834fcb96dabc401f29d613cf9fc75b8f5 100644
> --- a/drivers/iio/imu/inv_icm42600/inv_icm42600_i2c.c
> +++ b/drivers/iio/imu/inv_icm42600/inv_icm42600_i2c.c
> @@ -67,7 +67,7 @@ static int inv_icm42600_probe(struct i2c_client *client)
>  	if (IS_ERR(regmap))
>  		return PTR_ERR(regmap);
>  
> -	return inv_icm42600_core_probe(regmap, chip, client->irq,
> +	return inv_icm42600_core_probe(regmap, chip,
>  				       inv_icm42600_i2c_bus_setup);
>  }
>  
> diff --git a/drivers/iio/imu/inv_icm42600/inv_icm42600_spi.c b/drivers/iio/imu/inv_icm42600/inv_icm42600_spi.c
> index 2bd2c4c8e50c3fe081e882aca6c64736510b474c..f40a09c4cbfc673e76922d13d61a3634785300ec 100644
> --- a/drivers/iio/imu/inv_icm42600/inv_icm42600_spi.c
> +++ b/drivers/iio/imu/inv_icm42600/inv_icm42600_spi.c
> @@ -64,7 +64,7 @@ static int inv_icm42600_probe(struct spi_device *spi)
>  	if (IS_ERR(regmap))
>  		return PTR_ERR(regmap);
>  
> -	return inv_icm42600_core_probe(regmap, chip, spi->irq,
> +	return inv_icm42600_core_probe(regmap, chip,
>  				       inv_icm42600_spi_bus_setup);
>  }
>  
>