linux-kernel - Re: [PATCH v3 2/2] USB: typec: Add TI TPS25750 USB Type-C controller

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Message-ID: <ZOJvyMMgu0sN8jGM@abdel>
Date:   Sun, 20 Aug 2023 15:55:52 -0400
From:   Abdel Alkuor <alkuor@...il.com>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Cc:     devicetree@...r.kernel.org, gregkh@...uxfoundation.org,
        robh+dt@...nel.org, conor+dt@...nel.org, linux-usb@...r.kernel.org,
        linux-kernel@...r.kernel.org, abdelalkuor@...tab.com
Subject: Re: [PATCH v3 2/2] USB: typec: Add TI TPS25750 USB Type-C controller

On Sun, Aug 20, 2023 at 08:24:18AM +0200, Krzysztof Kozlowski wrote:
> On 20/08/2023 07:23, Abdel Alkuor wrote:
> > From: Abdel Alkuor <abdelalkuor@...tab.com>
> > 
> > TPS25750 is USB Type-C controller and Power Delivery controller.
> > 
> > TPS25750 needs to be configured after a cold reset. The configuration
> > can be applied either from an external EEPROM connected to the
> > controller or by a host using I2C. TI provides an online GUI that
> > can be used to generate the configuration binary.
> > Tool link: https://tinyurl.com/2s3watcm
> > P.S. It requires a TI account to be able to use the tool.
> > 
> ...
> 
> 
> > +
> > +static void tps25750_remove(struct i2c_client *client)
> > +{
> > +	struct tps25750 *tps = i2c_get_clientdata(client);
> > +
> > +	tps25750_disconnect(tps, 0);
> > +	typec_unregister_port(tps->port);
> > +	usb_role_switch_put(tps->role_sw);
> > +
> > +	/* clear the patch by a hard reset */
> > +	tps25750_exec_normal_cmd(tps, TPS_4CC_GAID);
> > +}
> > +
> > +static int __maybe_unused tps25750_suspend(struct device *dev)
> > +{
> > +	/* TODO: should we remove the patch? */
> > +	return 0;
> > +}
> > +
> > +static int __maybe_unused tps25750_resume(struct device *dev)
> > +{
> > +	struct i2c_client *client = to_i2c_client(dev);
> > +	struct tps25750 *tps = i2c_get_clientdata(client);
> > +
> > +	/* The controller needs to be reinitialized again
> 
> Format is:
> 
> /*
>  * The....
>
Fixed all mult-line comments in v4.
> > +	 * if it is powered off as config is not persisted
> > +	 */
> > +	return tps25750_init(tps);
> > +}
> > +
> > +static const struct dev_pm_ops tps25750_pm_ops = {
> > +	SET_SYSTEM_SLEEP_PM_OPS(tps25750_suspend, tps25750_resume)
> > +};
> > +
> > +static const struct of_device_id tps25750_of_match[] = {
> > +	{ .compatible = "ti,tps25750", },
> > +	{}
> > +};
> > +MODULE_DEVICE_TABLE(of, tps25750_of_match);
> > +
> > +static const struct i2c_device_id tps25750_id[] = {
> > +	{ "tps25750" },
> > +	{ }
> > +};
> > +MODULE_DEVICE_TABLE(i2c, tps25750_id);
> > +
> > +static struct i2c_driver tps25750_i2c_driver = {
> > +	.driver = {
> > +		.name = "tps25750",
> > +		.pm = pm_ptr(&tps25750_pm_ops),
> > +		.of_match_table = of_match_ptr(tps25750_of_match),
> 
> Drop of_match_ptr(). It will cause warnings.
>
Removed in v4.
> > +	},
> > +	.probe_new = tps25750_probe,
> > +	.remove = tps25750_remove,
> > +	.id_table = tps25750_id,
> > +};
> > +module_i2c_driver(tps25750_i2c_driver);
> 
> 
> Best regards,
> Krzysztof
>

Thanks,
Abdel