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From: Fabrice Gasnier <fabrice.gasnier@foss.st.com>
To: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Cc: <robh+dt@kernel.org>, <gregkh@linuxfoundation.org>,
	<krzysztof.kozlowski+dt@linaro.org>, <devicetree@vger.kernel.org>,
	<linux-usb@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
	<linux-stm32@st-md-mailman.stormreply.com>,
	<amelie.delaunay@foss.st.com>, <alexandre.torgue@foss.st.com>
Subject: Re: [PATCH 2/4] usb: typec: ucsi: stm32g0: add support for stm32g0 i2c controller
Date: Tue, 28 Jun 2022 09:21:12 +0200	[thread overview]
Message-ID: <bd35eb19-cfda-4799-1ab0-0578d3c79466@foss.st.com> (raw)
In-Reply-To: <YrmtzDfFm17PFl2r@kuha.fi.intel.com>

On 6/27/22 15:17, Heikki Krogerus wrote:
> Hi,
> 
> On Fri, Jun 24, 2022 at 05:54:11PM +0200, Fabrice Gasnier wrote:
>> +static int ucsi_stm32g0_probe(struct i2c_client *client, const struct i2c_device_id *id)
>> +{
>> +	struct device *dev = &client->dev;
>> +	struct ucsi_stm32g0 *g0;
>> +	int ret;
>> +
>> +	g0 = devm_kzalloc(dev, sizeof(*g0), GFP_KERNEL);
>> +	if (!g0)
>> +		return -ENOMEM;
>> +
>> +	g0->dev = dev;
>> +	g0->client = client;
>> +	init_completion(&g0->complete);
>> +	i2c_set_clientdata(client, g0);
>> +
>> +	g0->ucsi = ucsi_create(dev, &ucsi_stm32g0_ops);
>> +	if (IS_ERR(g0->ucsi))
>> +		return PTR_ERR(g0->ucsi);
>> +
>> +	ucsi_set_drvdata(g0->ucsi, g0);
>> +
>> +	/* Request alert interrupt */
>> +	ret = request_threaded_irq(client->irq, NULL, ucsi_stm32g0_irq_handler, IRQF_ONESHOT,
>> +				   dev_name(&client->dev), g0);
>> +	if (ret) {
>> +		dev_err_probe(dev, ret, "request IRQ failed\n");
>> +		goto destroy;
>> +	}
>> +
>> +	ret = ucsi_register(g0->ucsi);
>> +	if (ret) {
>> +		dev_err_probe(dev, ret, "ucsi_register failed\n");
>> +		goto freeirq;
>> +	}
> 
> If there isn't UCSI firmware, then ucsi_register() will always safely
> fail here, right?

Hi Heikki,

Yes, in such a case, the first i2c read (UCSI_VERSION) in
ucsi_register() will return an error and safely fail here.

Thanks for reviewing,
Best Regards,
Fabrice

> 
> 
>> +	return 0;
>> +
>> +freeirq:
>> +	free_irq(client->irq, g0);
>> +destroy:
>> +	ucsi_destroy(g0->ucsi);
>> +
>> +	return ret;
>> +}
> 
> 
> thanks,
> 

  reply	other threads:[~2022-06-28  7:21 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-06-24 15:54 [PATCH 0/4] usb: typec: ucsi: add support for stm32g0 Fabrice Gasnier
2022-06-24 15:54 ` [PATCH 1/4] dt-bindings: usb: typec: add bindings for stm32g0 controller Fabrice Gasnier
2022-06-24 16:16   ` Krzysztof Kozlowski
2022-06-27 14:21     ` Fabrice Gasnier
2022-06-28 10:28       ` Krzysztof Kozlowski
2022-06-28 17:01         ` Fabrice Gasnier
2022-06-29  5:54           ` Krzysztof Kozlowski
2022-07-01 10:04             ` Fabrice Gasnier
2022-07-04  7:55               ` Krzysztof Kozlowski
2022-07-04  9:08                 ` Fabrice Gasnier
2022-07-06  7:06                   ` Krzysztof Kozlowski
2022-06-24 15:54 ` [PATCH 2/4] usb: typec: ucsi: stm32g0: add support for stm32g0 i2c controller Fabrice Gasnier
2022-06-25  6:37   ` Christophe JAILLET
2022-06-27 13:17   ` Heikki Krogerus
2022-06-28  7:21     ` Fabrice Gasnier [this message]
2022-06-28  9:56       ` Heikki Krogerus
2022-06-24 15:54 ` [PATCH 3/4] usb: typec: ucsi: stm32g0: add bootloader support Fabrice Gasnier
2022-06-24 15:54 ` [PATCH 4/4] usb: typec: ucsi: stm32g0: add support for power management Fabrice Gasnier

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