linux-kernel - Re: [RFC PATCH] regulator: palmas: enable all modes for SMPS10

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Date:	Thu, 30 May 2013 18:24:37 +0530
From:	Kishon Vijay Abraham I <kishon@...com>
To:	Mark Brown <broonie@...nel.org>
CC:	<lgirdwood@...il.com>, <ldewangan@...dia.com>,
	<sameo@...ux.intel.com>, <linux-kernel@...r.kernel.org>,
	<gg@...mlogic.co.uk>, <ian@...mlogic.co.uk>, <balbi@...com>
Subject: Re: [RFC PATCH] regulator: palmas: enable all modes for SMPS10

Hi,

On Thursday 30 May 2013 05:02 PM, Mark Brown wrote:
> On Thu, May 30, 2013 at 04:26:33PM +0530, Kishon Vijay Abraham I wrote:
>
>> Only compile tested. Just sent a patch to get some comments
>> /ideas on how to handle such one off regulators.
>> to handle
>
> What's unclear or confusing?  This all looks really basic...

For instance mapping of regulator modes to smps10 modes is unclear.
>
>> +	palmas_smps_read(pmic->palmas, palmas_regs_info[id].ctrl_addr, &reg);
>> +	reg &= ~PALMAS_SMPS10_CTRL_MODE_ACTIVE_MODE_MASK;
>> +
>> +	if (mode == REGULATOR_MODE_NORMAL)
>> +		reg |= SMPS10_BOOST_EN;
>> +
>> +	if (mode == REGULATOR_MODE_FAST)
>> +		reg |= SMPS10_SWITCH_EN;
>> +
>> +	if (mode == REGULATOR_MODE_IDLE)
>> +		reg |= SMPS10_BYPASS_EN;
>> +
>> +	palmas_smps_write(pmic->palmas, palmas_regs_info[id].ctrl_addr, reg);
>> +	return 0;
>
> This looks like a switch statement and isn't there an update bits
> operation?

There can be multiple modes set at the same time. Having switch 
statement means we would need to call the same API multiple times to set 
the mode. There isn't a palmas wrapper to regmap_update_bits. I can send 
a patch to add a palmas wrapper.

Thanks
Kishon
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