Re: [PATCH] iio: humidity: ens210: Fix missing I2C functionality checks

[Salah Triki <salah.triki@gmail.com>]

On Tue, May 05, 2026 at 12:07:04PM +0300, Andy Shevchenko wrote:
> On Tue, May 05, 2026 at 10:02:47AM +0100, Salah Triki wrote:
> > The ENS210 driver uses both `i2c_smbus_read_byte_data()` and
> > `i2c_smbus_read_word_data()` during the read and probe phases.
> > However, `i2c_check_functionality()` was only checking for block reads
> > and simple byte writes, which could lead to hardware interface
> > incompatibilities or errors on certain adapters that do not natively
> > support SMBus word or byte data transactions.
> > 
> > Add `I2C_FUNC_SMBUS_READ_BYTE_DATA` and `I2C_FUNC_SMBUS_READ_WORD_DATA`
> > to the functionality check mask to ensure the adapter supports the
> > required operations before communication begins.
> 
> Can we rather modify the driver to use SW emulation for these cases?
> 
> -- 
> With Best Regards,
> Andy Shevchenko
> 
> 

I'll update the probe function to check for I2C_FUNC_SMBUS_EMUL instead of
the individual functions.

Thanks for the suggestion.

Best regards
--
Salah Triki