Re: [RFC PATCH 0/3] gpio: pca953x: Redesign handling of chip types

[Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>]

On Mon, Jan 30, 2023 at 09:59:30PM +0100, Levente Révész wrote:
> Hi All,
> 
> The pca953x driver supports many chips. These all have the basic 4
> registers: input, output, invert and direction. Most of them have
> additional registers for various functions, like pull-up and
> pull-down control, interrupt status and mask, hardware debounce.
> 
> Different chip types have various register layouts. These layouts differ
> even in the basic 4 registers.
> 
> This patch series
> 
>     1. Cleans up chip type handling, and
>     2. Replaces register address calculations. The proposed scheme
>        works with every register of every chip type.
> 
> These changes make it possible to add support for extended functions for
> more chip types, including:
> 
>     * Interrupt mask for PCA950X, PCA9698, PCA957X and XRA120X
>     * Interrupt status for PCA957X and XRA120X
>     * Bias for PCA957X and XRA120X
>     * Debounce for PCAL65XX and XRA120X
> 
> References:
> 1. Previous discussion about the chip types
>    https://lore.kernel.org/linux-gpio/Y1q52efyv93%2Fz8BC@xxxxxxxxxxxxxxxxxx/
> 2. An overview of pca953x chip types
>    https://lore.kernel.org/linux-gpio/67bba210-09ac-32fb-bb97-8bfc40c2c200@xxxxxxxxxx/

Thank you for the update, I'll look into the series later on.
Just to tell you that your cover letter is from something else according to the
email chain (the 1/3 isn't linked to 0/3).

-- 
With Best Regards,
Andy Shevchenko