linux-kernel - Re: [PATCH V4 3/3] soc/tegra: pmc: Add support for IO pads power state and voltage

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Date:	Fri, 6 May 2016 21:02:22 +0530
From:	Laxman Dewangan <ldewangan@...dia.com>
To:	Jon Hunter <jonathanh@...dia.com>, <thierry.reding@...il.com>,
	<airlied@...ux.ie>, <swarren@...dotorg.org>, <gnurou@...il.com>
CC:	<dri-devel@...ts.freedesktop.org>, <linux-tegra@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>
Subject: Re: [PATCH V4 3/3] soc/tegra: pmc: Add support for IO pads power
 state and voltage


On Friday 06 May 2016 08:07 PM, Jon Hunter wrote:
> On 06/05/16 11:45, Laxman Dewangan wrote:
> +
> +	/* Last entry */
> +	TEGRA_IO_PAD_MAX,
> Nit should these be TEGRA_IO_PADS_xxx?

Because this was name of single pad and hence I said TEGRA_IO_PAD_XXX.


>> +};
>> +
>> +/* tegra_io_pads_source_voltage: The voltage level of IO rails which source
>> + *				 the IO pads.
>> + */
>> +enum tegra_io_pads_source_voltage {
>> +	TEGRA_IO_PADS_SOURCE_VOLTAGE_1800000UV,
>> +	TEGRA_IO_PADS_SOURCE_VOLTAGE_3300000UV,
>> +};
> Nit I wonder if we can make this shorter ...
>
> enum tegra_io_pads_vconf {
> 	TEGRA_IO_PADS_VCONF_1V8,
> 	TEGRA_IO_PADS_VCONF_3V3,

This looks good but for voltage and current, unit is used uV/uV across 
the system. So wanted to have same unit.


>
>> -int tegra_io_rail_power_on(unsigned int id);
>> -int tegra_io_rail_power_off(unsigned int id);
>> +/* Power enable/disable of the IO pads */
>> +int tegra_io_pads_power_enable(enum tegra_io_pads id);
>> +int tegra_io_pads_power_disable(enum tegra_io_pads id);
>> +int tegra_io_pads_power_is_enabled(enum tegra_io_pads id);
>> +
>> +/* Set/get Tegra IO pads voltage config registers */
>> +int tegra_io_pads_set_voltage_config(enum tegra_io_pads id,
>> +				     enum tegra_io_pads_source_voltage rail_uv);
>> +int tegra_io_pads_get_voltage_config(enum tegra_io_pads id);
> Ideally, for public function we should have kernel-doc descriptions.


I think we can have different patches for describing all the public 
interfaces with proper arguments description.
May be after this series, I can work on this.



>
> Otherwise looks fine. I would not rev this unless Thierry has some comments.
>
> Cheers
> Jon