linux-kernel - Re: [PATCH v3 05/13] usb: typec: ucsi

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Date:   Wed, 16 Nov 2022 14:54:31 +0200
From:   Heikki Krogerus <heikki.krogerus@...ux.intel.com>
To:     Wayne Chang <waynec@...dia.com>
Cc:     gregkh@...uxfoundation.org, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org, treding@...dia.com,
        jonathanh@...dia.com, thierry.reding@...il.com, ajayg@...dia.com,
        vkoul@...nel.org, p.zabel@...gutronix.de, balbi@...nel.org,
        mathias.nyman@...el.com, jckuo@...dia.com,
        linux-usb@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, singhanc@...dia.com,
        linux-i2c@...r.kernel.org, linux-phy@...ts.infradead.org,
        linux-tegra@...r.kernel.org
Subject: Re: [PATCH v3 05/13] usb: typec: ucsi_ccg: Add OF support

On Mon, Nov 14, 2022 at 08:40:45PM +0800, Wayne Chang wrote:
> The change enables the device tree infrastructure support.
> 
> Signed-off-by: Wayne Chang <waynec@...dia.com>
> ---
> V2 -> V3:nothing has changed
> V1 -> V2:nothing has changed
>  drivers/usb/typec/ucsi/ucsi_ccg.c | 9 ++++++++-
>  1 file changed, 8 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/usb/typec/ucsi/ucsi_ccg.c b/drivers/usb/typec/ucsi/ucsi_ccg.c
> index 835f1c4372ba..139707a2f3d6 100644
> --- a/drivers/usb/typec/ucsi/ucsi_ccg.c
> +++ b/drivers/usb/typec/ucsi/ucsi_ccg.c
> @@ -643,7 +643,7 @@ static int ccg_request_irq(struct ucsi_ccg *uc)
>  {
>  	unsigned long flags = IRQF_ONESHOT;
>  
> -	if (!has_acpi_companion(uc->dev))
> +	if (!dev_fwnode(uc->dev))
>  		flags |= IRQF_TRIGGER_HIGH;

Sorry, I had to double check this, and the above does not work after
all. In the function i2c_new_ccgx_ucsi() the device is given a fwnode
(of type software_node).

So that probable has to be changed to:

        if (is_software_node(dev_fwnode(uc->dev)))
                flags |= IRQF_TRIGGER_HIGH;

>  	return request_threaded_irq(uc->irq, NULL, ccg_irq_handler, flags, dev_name(uc->dev), uc);
> @@ -1427,6 +1427,12 @@ static void ucsi_ccg_remove(struct i2c_client *client)
>  	free_irq(uc->irq, uc);
>  }
>  
> +static const struct of_device_id ucsi_ccg_of_match_table[] = {
> +		{ .compatible = "cypress,cypd4226", },
> +		{ /* sentinel */ }
> +};
> +MODULE_DEVICE_TABLE(of, ucsi_ccg_of_match_table);
> +
>  static const struct i2c_device_id ucsi_ccg_device_id[] = {
>  	{"ccgx-ucsi", 0},
>  	{}
> @@ -1481,6 +1487,7 @@ static struct i2c_driver ucsi_ccg_driver = {
>  		.pm = &ucsi_ccg_pm,
>  		.dev_groups = ucsi_ccg_groups,
>  		.acpi_match_table = amd_i2c_ucsi_match,
> +		.of_match_table = ucsi_ccg_of_match_table,
>  	},
>  	.probe = ucsi_ccg_probe,
>  	.remove = ucsi_ccg_remove,

thanks,

-- 
heikki