Re: [PATCH v12] thermal: drivers: mediatek: Add the Low Voltage Thermal Sensor driver

Krzysztof Kozlowski
2023-02-06T14:30:25Z

On 06/02/2023 15:07, Daniel Lezcano wrote:
> On Wed, Feb 01, 2023 at 08:55:07AM +0100, Krzysztof Kozlowski wrote:
>> On 31/01/2023 16:38, bchihi@baylibre.com wrote:
>>> From: Balsam CHIHI <bchihi@baylibre.com>
>>>
>>> The Low Voltage Thermal Sensor (LVTS) is a multiple sensors, multi
>>> controllers contained in a thermal domain.
>>>
>>> A thermal domains can be the MCU or the AP.
>>>
>>> Each thermal domains contain up to seven controllers, each thermal
>>> controller handle up to four thermal sensors.
>>>
>>> The LVTS has two Finite State Machines (FSM), one to handle the
>>> functionin temperatures range like hot or cold temperature and another
>>> one to handle monitoring trip point. The FSM notifies via interrupts
>>> when a trip point is crossed.
>>>
>>
>> (...)
>>
>>> +
>>> +struct lvts_domain {
>>> + struct lvts_ctrl *lvts_ctrl;
>>> + struct reset_control *reset;
>>> + struct clk *clk;
>>> + int num_lvts_ctrl;
>>> + void __iomem *base;
>>> + size_t calib_len;
>>> + u8 *calib;
>>> +};
>>> +
>>> +#ifdef CONFIG_MTK_LVTS_THERMAL_DEBUGFS
>>> +
>>> +static struct dentry *root;
>>
>> How do you handle two instances of driver?
>
> For now, we can put the entry in /sys/kernel/debug/<dev_name>
>
> I'm preparing a debugfs series for the thermal framework and that will provide
> an entry to hook in for the sensors debugfs if available

The code looked like it does not support it at all. I think it would
remove entries from second instance, while unbinding the first (or the
opposite).

Best regards,
Krzysztof