linux-kernel - Re: [PATCH v3 05/25] media: i2c: imx258: Add regulator control

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Date: Fri, 5 Apr 2024 23:23:42 -0600
From: Luis Garcia <git@...gi311.com>
To: Pavel Machek <pavel@....cz>
Cc: linux-media@...r.kernel.org, dave.stevenson@...pberrypi.com,
 jacopo.mondi@...asonboard.com, mchehab@...nel.org, robh@...nel.org,
 krzysztof.kozlowski+dt@...aro.org, conor+dt@...nel.org, shawnguo@...nel.org,
 s.hauer@...gutronix.de, kernel@...gutronix.de, festevam@...il.com,
 sakari.ailus@...ux.intel.com, devicetree@...r.kernel.org,
 imx@...ts.linux.dev, linux-arm-kernel@...ts.infradead.org,
 linux-kernel@...r.kernel.org, phone-devel@...r.kernel.org
Subject: Re: [PATCH v3 05/25] media: i2c: imx258: Add regulator control

On 4/3/24 12:44, Pavel Machek wrote:
> Hi!
> 
>> The device tree bindings define the relevant regulators for the
>> sensor, so update the driver to request the regulators and control
>> them at the appropriate times.
> 
>> @@ -995,9 +1007,19 @@ static int imx258_power_on(struct device *dev)
>>  	struct imx258 *imx258 = to_imx258(sd);
>>  	int ret;
>>  
>> +	ret = regulator_bulk_enable(IMX258_NUM_SUPPLIES,
>> +				    imx258->supplies);
>> +	if (ret) {
> 
> Will this make it fail for all current users?
> 
> Best regards,
> 								Pavel
> 								

It shouldn't affect current users as this was added in by dave for
a completely different sensor and it still works on my ppp. Looking
at the dmesg for imx258 it does reference the regulators that the
ppp doesnt have but it still works.