Subject: [PATCH 2/5] thermal: rockchip: Support the RK3368 SoCs in thermal driver

From: [email-masked] (Caesar Wang)
Date: Thu, 24 Sep 2015 10:27:50 +0800

Hi Dmitry,

? 2015?09?22? 01:08, Dmitry Torokhov ??:
> Hi Caesar,
>
> On Mon, Sep 21, 2015 at 12:16:08PM +0800, Caesar Wang wrote:
>> The RK3368 SoCs support to 2 channel TS-ADC, the temperature criteria
>> of each channel can be configurable.
>>
>> The system has two Temperature Sensors, channel 0 is for CPU,
>> and channel 1 is for GPU.
>>
>> Signed-off-by: Caesar Wang <[email-masked]>
>> ---
>>
>>   drivers/thermal/rockchip_thermal.c | 201 ++++++++++++++++++++++++++++++++-----
>>   1 file changed, 176 insertions(+), 25 deletions(-)
>>
>> diff --git a/drivers/thermal/rockchip_thermal.c b/drivers/thermal/rockchip_thermal.c
>> index 4d5b7d4..16d2476 100644
>> --- a/drivers/thermal/rockchip_thermal.c
>> +++ b/drivers/thermal/rockchip_thermal.c
>> @@ -1,6 +1,9 @@
>>   /*
>>    * Copyright (c) 2014, Fuzhou Rockchip Electronics Co., Ltd
>>    *
>> + * Copyright (c) 2015, Fuzhou Rockchip Electronics Co., Ltd
>> + * Caesar Wang <[email-masked]>
>> + *
>>    * This program is free software; you can redistribute it and/or modify it
>>    * under the terms and conditions of the GNU General Public License,
>>    * version 2, as published by the Free Software Foundation.
>> @@ -43,16 +46,11 @@ enum tshut_polarity {
>>   	TSHUT_HIGH_ACTIVE,
>>   };
>>   
>> -/**
>> - * The system has three Temperature Sensors.  channel 0 is reserved,
>> - * channel 1 is for CPU, and channel 2 is for GPU.
>> - */
>> -enum sensor_id {
>> -	SENSOR_CPU = 1,
>> -	SENSOR_GPU,
>> -};
>> -
>>   struct rockchip_tsadc_chip {
>> +	/* The sensor id of chip correspond to the ADC channel */
>> +	int cpu_id;
>> +	int gpu_id;
>> +
>>   	/* The hardware-controlled tshut property */
>>   	long tshut_temp;
>>   	enum tshut_mode tshut_mode;
>> @@ -72,10 +70,11 @@ struct rockchip_tsadc_chip {
>>   struct rockchip_thermal_sensor {
>>   	struct rockchip_thermal_data *thermal;
>>   	struct thermal_zone_device *tzd;
>> -	enum sensor_id id;
>> +	int id;
>>   };
>>   
>> -#define NUM_SENSORS	2 /* Ignore unused sensor 0 */
>> +/* Two sensors: CPU and GPU */
>> +#define NUM_SENSORS	2
>>   
>>   struct rockchip_thermal_data {
>>   	const struct rockchip_tsadc_chip *chip;
>> @@ -94,7 +93,7 @@ struct rockchip_thermal_data {
>>   	enum tshut_polarity tshut_polarity;
>>   };
>>   
>> -/* TSADC V2 Sensor info define: */
>> +/* TSADC Sensor info define: */
>>   #define TSADCV2_AUTO_CON			0x04
>>   #define TSADCV2_INT_EN				0x08
>>   #define TSADCV2_INT_PD				0x0c
>> @@ -116,6 +115,8 @@ struct rockchip_thermal_data {
>>   #define TSADCV2_INT_PD_CLEAR_MASK		~BIT(8)
>>   
>>   #define TSADCV2_DATA_MASK			0xfff
>> +#define TSADCV3_DATA_MASK			0x3ff
>> +
>>   #define TSADCV2_HIGHT_INT_DEBOUNCE_COUNT	4
>>   #define TSADCV2_HIGHT_TSHUT_DEBOUNCE_COUNT	4
>>   #define TSADCV2_AUTO_PERIOD_TIME		250 /* msec */
>> @@ -164,6 +165,45 @@ static const struct tsadc_table v2_code_table[] = {
>>   	{3421, 125000},
>>   };
>>   
>> +static const struct tsadc_table v3_code_table[] = {
>> +	{0, -40000},
>> +	{106, -40000},
>> +	{108, -35000},
>> +	{110, -30000},
>> +	{112, -25000},
>> +	{114, -20000},
>> +	{116, -15000},
>> +	{118, -10000},
>> +	{120, -5000},
>> +	{122, 0},
>> +	{124, 5000},
>> +	{126, 10000},
>> +	{128, 15000},
>> +	{130, 20000},
>> +	{132, 25000},
>> +	{134, 30000},
>> +	{136, 35000},
>> +	{138, 40000},
>> +	{140, 45000},
>> +	{142, 50000},
>> +	{144, 55000},
>> +	{146, 60000},
>> +	{148, 65000},
>> +	{150, 70000},
>> +	{152, 75000},
>> +	{154, 80000},
>> +	{156, 85000},
>> +	{158, 90000},
>> +	{160, 95000},
>> +	{162, 100000},
>> +	{163, 105000},
>> +	{165, 110000},
>> +	{167, 115000},
>> +	{169, 120000},
>> +	{171, 125000},
>> +	{TSADCV3_DATA_MASK, 125000},
>> +};
>> +
>>   static u32 rk_tsadcv2_temp_to_code(long temp)
>>   {
>>   	int high, low, mid;
>> @@ -227,16 +267,83 @@ static int rk_tsadcv2_code_to_temp(u32 code, int *temp)
>>   	return 0;
>>   }
>>   
>> +static u32 rk_tsadcv3_temp_to_code(long temp)
>> +{
>> +	int high, low, mid;
>> +
>> +	low = 0;
>> +	high = ARRAY_SIZE(v3_code_table) - 1;
>> +	mid = (high + low) / 2;
>> +
>> +	if (temp < v3_code_table[low].temp || temp > v3_code_table[high].temp)
>> +		return 0;
> How is this different from v2 conversion except for the table being
> used? I think you should be able to reuse the conversion routines if you
> pass the conversion table in as a parameter.

The table_v3 is same with the table_v2 but the anolog data of ADC.

Do you want to reuse the conversion routines,?  I know the conversion 
routines is same in
rk_tsadcv3_temp_to_code() if we have many socs maybe the ADC analog data 
are different.

Says:

rk_tsadcv3_temp_to_code(temp, xxx)

{
     ...

yyyy =  rk_tsadcv2_temp_to_code(temp)

...
}
...

I guess you want to independent the adc value,after all the temperature 
points are same.

Says: maybe i will better likely on this.

//3066/3188
.....

//3288

static const struct tsadc_table v2_code_table[] = {
	{0,3800,3792,3783, 3774,3765, 3756,3747,......
},

//3368

static const struct tsadc_table v3_code_table[] = {
	{0,106,108,110,112,114,......
},

//next socs

  ....

Dmitry, I know you don't mean that.:-)

I'm no sure if this way will better for the thermal driver.

> Thanks.

-- 
Thanks,
Caesar