linux-kernel - Re: [PATCH v2,2/2] usb: chipidea: imx: set power polarity

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Message-ID: <b95de83f-b0fe-b31f-22c9-a0dfdc2ff078@emlix.com>
Date:   Mon, 21 Jan 2019 18:57:51 +0100
From:   Philipp Puschmann <pp@...ix.com>
To:     Sergei Shtylyov <sergei.shtylyov@...entembedded.com>,
        Philipp Puschmann <philipp.puschmann@...ix.com>,
        gregkh@...uxfoundation.org
Cc:     robh+dt@...nel.org, mark.rutland@....com, Peter.Chen@....com,
        linux-usb@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2,2/2] usb: chipidea: imx: set power polarity

Hi!

Am 16.01.19 um 17:32 schrieb Sergei Shtylyov:
> Hello!
> 
> On 01/16/2019 01:51 PM, Philipp Puschmann wrote:
> 
>> This patch adds support to set the power line polarity for i.MX6q/dl.
>>
>> To let the USB controller control the power it may be necessary to configure
>> the polarity of the power line. So far the polarity was configured
>> by Bootloader or alternatively the power line was muxed as gpio and
>> driven by a regulator.
>>
>> Signed-off-by: Philipp Puschmann <philipp.puschmann@...ix.com>
>> ---
>>
>> V2: fixed wrong variable name ...
>>
>> ---
>>  drivers/usb/chipidea/ci_hdrc_imx.c | 3 +++
>>  drivers/usb/chipidea/ci_hdrc_imx.h | 1 +
>>  drivers/usb/chipidea/usbmisc_imx.c | 4 ++++
>>  3 files changed, 8 insertions(+)
>>
>> diff --git a/drivers/usb/chipidea/ci_hdrc_imx.c b/drivers/usb/chipidea/ci_hdrc_imx.c
>> index e81de9ca8729..32dc120680fa 100644
>> --- a/drivers/usb/chipidea/ci_hdrc_imx.c
>> +++ b/drivers/usb/chipidea/ci_hdrc_imx.c
>> @@ -152,6 +152,9 @@ static struct imx_usbmisc_data *usbmisc_get_init_data(struct device *dev)
>>  		dev_warn(dev, "No over current polarity defined\n");
>>  	}
>>  
>> +	if (of_find_property(np, "power-active-high", NULL))
> 
>    How about of_property_read_bool()?

Good idea. I will send a patch v4 in next days.
> 
>> +		data->pwr_pol = 1;
>> +
>>  	if (of_find_property(np, "external-vbus-divider", NULL))
>>  		data->evdo = 1;
>>  
> [...]
> 
> MBR, Sergei
>