> -----Original Message-----
> From: Mark Brown [mailto:[email protected]]
> Sent: Tuesday, May 28, 2013 6:04 PM
> To: yi zhang
> Cc: Liam Girdwood; Chao Xie; [email protected];
> [email protected]; Yi Zhang
> Subject: Re: [PATCH] regulator: 88pm800: add regulator driver
>
> On Tue, May 28, 2013 at 10:32:09AM +0800, yi zhang wrote:
>
>> HI, Brown:
>> In western culture it's either "Hi Mark" or "Hi Mr Brown" (though the latter
>> is pretty formal so not used much for things like mailing lists).
>
>> Sorry I'm a little confused:
>> You mean I should use a function for example
>> "create_buck_table()" to create the BUCK voltage table?
>> such as:
>> void create_buck_table()
>> {
>> if (voltage < 1587500) {
>> /* initialize the BUCK_table */
>> } else
>> /* initialize the BUCK_table */
>> }
>
> No, I mean you shouldn't be using a table at all but have mapping and list
> functions which just do the calculation required to generate the tables
> directly. This saves scanning through the table as direct calcuation is
> possible.
Hi, Mark
Thanks for your review.
Because structure regulator_desc only accepts the voltage table as constant.
struct regulator_desc {
...
const unsigned int *volt_table;
...
};
If we want to make use of the volt_table, and the help functions
regulator_map_voltage_iterate and regulator_list_voltage_table, we have to
initialize the tables as what we do now.
So what you mean that we can maintain the structure describes the voltage
information in out private structure
struct 88pm800_regulator_desc {
struct regulator_desc desc
...
struct 88pm800_regulator_vol_table vol_table;
};
The struct 88pm800_regulator_vol_table can be used to define the details of the
LDOes like start_vol/end_vol/step.
Then we need define our own map_voltage and list_voltage functions, and based
on the struct 88pm800_regulator_vol_table to calculate the correct voltage.
Is above solution what you mean?
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