Re: [PATCH v5 2/7] hw/misc/led: Allow connecting from GPIO output

[Richard Henderson <richard.henderson@linaro.org>]

On 9/10/20 1:54 PM, Philippe Mathieu-Daudé wrote:
> Some devices expose GPIO lines.
> 
> Add a GPIO qdev input to our LED device, so we can
> connect a GPIO output using qdev_connect_gpio_out().
> 
> When used with GPIOs, the intensity can only be either
> minium or maximum. This depends of the polarity of the
> GPIO (which can be inverted).
> Declare the GpioPolarity type to model the polarity.
> 
> Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
> ---
>  include/hw/misc/led.h  |  8 ++++++++
>  include/hw/qdev-core.h |  8 ++++++++
>  hw/misc/led.c          | 17 ++++++++++++++++-
>  3 files changed, 32 insertions(+), 1 deletion(-)
> 
> diff --git a/include/hw/misc/led.h b/include/hw/misc/led.h
> index f5afaa34bfb..71c9b8c59bf 100644
> --- a/include/hw/misc/led.h
> +++ b/include/hw/misc/led.h
> @@ -38,10 +38,16 @@ typedef struct LEDState {
>      /* Public */
>  
>      uint8_t intensity_percent;
> +    qemu_irq irq;
>  
>      /* Properties */
>      char *description;
>      char *color;
> +    /*
> +     * When used with GPIO, the intensity at reset is related
> +     * to the GPIO polarity.
> +     */
> +    bool inverted_polarity;

Why are you not using the GpioPolarity enum that you added?


r~