[PATCH v2 2/4] thermal: mediatek: add Mediatek thermal driver for mt2712

[Dawei Chien]

On Fri, 2017-08-25 at 10:30 +0800, Zhang Rui wrote:
> On Tue, 2017-08-08 at 21:23 +0800, Zhang Rui wrote:
> > On Tue, 2017-08-01 at 15:28 +0800, Louis Yu wrote:
> > > 
> > > This patch adds support for mt2712 chip to mtk_thermal,
> > > and integrate mt2712 into the same mediatek thermal driver.
> > > MT2712 has only 1 bank and 4 sensors.
> > > 
> > > Signed-off-by: Louis Yu <louis.yu at mediatek.com>
> > > ---
> > >  drivers/thermal/mtk_thermal.c | 70
> > > ++++++++++++++++++++++++++++++++++++++++---
> > >  1 file changed, 66 insertions(+), 4 deletions(-)
> > > 
> > > diff --git a/drivers/thermal/mtk_thermal.c
> > > b/drivers/thermal/mtk_thermal.c
> > > index 7737f14..e35d28d 100644
> > > --- a/drivers/thermal/mtk_thermal.c
> > > +++ b/drivers/thermal/mtk_thermal.c
> > > @@ -3,6 +3,7 @@
> > >   * Author: Hanyi Wu <hanyi.wu at mediatek.com>
> > >   *         Sascha Hauer <s.hauer at pengutronix.de>
> > >   *         Dawei Chien <dawei.chien at mediatek.com>
> > > + *         Louis Yu <louis.yu at mediatek.com>
> > I need the feedback from the previous authors for the changes in all
> > this patch set.
> > 
> Hanyi, Sascha and Dawei,
> 
> can you please review this patch and let me know your opinion?
> 
> thanks,
> rui

Hi Rui,
In my opinion, I agree this patch set for supporting MT2712 thermal
sensor.

Reviewed-by: Dawei Chien <dawei.chien at mediatek.com>

> > > 
> > >   *
> > >   * This program is free software; you can redistribute it and/or
> > > modify
> > >   * it under the terms of the GNU General Public License version 2
> > > as
> > > @@ -111,9 +112,10 @@
> > >  
> > >  /*
> > >   * Layout of the fuses providing the calibration data
> > > - * These macros could be used for both MT8173 and MT2701.
> > > + * These macros could be used for both MT8173, MT2701, and MT2712.
> > >   * MT8173 has five sensors and need five VTS calibration data,
> > > - * and MT2701 has three sensors and need three VTS calibration
> > > data.
> > > + * and MT2701 has three sensors and need three VTS calibration
> > > data,
> > > + * and MT2712 has four sensors and need four VTS calibration data.
> > >   */
> > why bother change these comments again in patch 3/4?
> > 
> > thanks,
> > rui

Hi Rui,
May we know your opinion if this patch set need merge patch2/3/4

> > > 
> > >  #define MT8173_CALIB_BUF0_VALID		BIT(0)
> > >  #define MT8173_CALIB_BUF1_ADC_GE(x)	(((x) >> 22) & 0x3ff)
> > > @@ -136,11 +138,26 @@
> > >  /* The total number of temperature sensors in the MT2701 */
> > >  #define MT2701_NUM_SENSORS	3
> > >  
> > > -#define THERMAL_NAME    "mtk-thermal"
> > > -
> > >  /* The number of sensing points per bank */
> > >  #define MT2701_NUM_SENSORS_PER_ZONE	3
> > >  
> > > +/* MT2712 thermal sensors */
> > > +#define MT2712_TS1	0
> > > +#define MT2712_TS2	1
> > > +#define MT2712_TS3	2
> > > +#define MT2712_TS4	3
> > > +
> > > +/* AUXADC channel 11 is used for the temperature sensors */
> > > +#define MT2712_TEMP_AUXADC_CHANNEL	11
> > > +
> > > +/* The total number of temperature sensors in the MT2712 */
> > > +#define MT2712_NUM_SENSORS	4
> > > +
> > > +/* The number of sensing points per bank */
> > > +#define MT2712_NUM_SENSORS_PER_ZONE	4
> > > +
> > > +#define THERMAL_NAME    "mtk-thermal"
> > > +
> > >  struct mtk_thermal;
> > >  
> > >  struct thermal_bank_cfg {
> > > @@ -215,6 +232,21 @@ struct mtk_thermal {
> > >  
> > >  static const int mt2701_mux_values[MT2701_NUM_SENSORS] = { 0, 1,
> > > 16
> > > };
> > >  
> > > +/* MT2712 thermal sensor data */
> > > +static const int mt2712_bank_data[MT2712_NUM_SENSORS] = {
> > > +	MT2712_TS1, MT2712_TS2, MT2712_TS3, MT2712_TS4
> > > +};
> > > +
> > > +static const int mt2712_msr[MT2712_NUM_SENSORS_PER_ZONE] = {
> > > +	TEMP_MSR0, TEMP_MSR1, TEMP_MSR2, TEMP_MSR3
> > > +};
> > > +
> > > +static const int mt2712_adcpnp[MT2712_NUM_SENSORS_PER_ZONE] = {
> > > +	TEMP_ADCPNP0, TEMP_ADCPNP1, TEMP_ADCPNP2, TEMP_ADCPNP3
> > > +};
> > > +
> > > +static const int mt2712_mux_values[MT2712_NUM_SENSORS] = { 0, 1,
> > > 2,
> > > 3 };
> > > +
> > >  /**
> > >   * The MT8173 thermal controller has four banks. Each bank can
> > > read
> > > up to
> > >   * four temperature sensors simultaneously. The MT8173 has a total
> > > of 5
> > > @@ -278,6 +310,31 @@ struct mtk_thermal {
> > >  };
> > >  
> > >  /**
> > > + * The MT2712 thermal controller has one bank, which can read up
> > > to
> > > + * four temperature sensors simultaneously. The MT2712 has a total
> > > of 4
> > > + * temperature sensors.
> > > + *
> > > + * The thermal core only gets the maximum temperature of this one
> > > bank,
> > > + * so the bank concept wouldn't be necessary here. However, the
> > > SVS
> > > (Smart
> > > + * Voltage Scaling) unit makes its decisions based on the same
> > > bank
> > > + * data.
> > > + */
> > > +static const struct mtk_thermal_data mt2712_thermal_data = {
> > > +	.auxadc_channel = MT2712_TEMP_AUXADC_CHANNEL,
> > > +	.num_banks = 1,
> > > +	.num_sensors = MT2712_NUM_SENSORS,
> > > +	.bank_data = {
> > > +		{
> > > +			.num_sensors = 4,
> > > +			.sensors = mt2712_bank_data,
> > > +		},
> > > +	},
> > > +	.msr = mt2712_msr,
> > > +	.adcpnp = mt2712_adcpnp,
> > > +	.sensor_mux_values = mt2712_mux_values,
> > > +};
> > > +
> > > +/**
> > >   * raw_to_mcelsius - convert a raw ADC value to mcelsius
> > >   * @mt:		The thermal controller
> > >   * @raw:	raw ADC value
> > > @@ -571,6 +628,10 @@ static int
> > > mtk_thermal_get_calibration_data(struct device *dev,
> > >  	{
> > >  		.compatible = "mediatek,mt2701-thermal",
> > >  		.data = (void *)&mt2701_thermal_data,
> > > +	},
> > > +	{
> > > +		.compatible = "mediatek,mt2712-thermal",
> > > +		.data = (void *)&mt2712_thermal_data,
> > >  	}, {
> > >  	},
> > >  };
> > > @@ -705,6 +766,7 @@ static int mtk_thermal_remove(struct
> > > platform_device *pdev)
> > >  
> > >  module_platform_driver(mtk_thermal_driver);
> > >  
> > > +MODULE_AUTHOR("Louis Yu <louis.yu at mediatek.com>");
> > >  MODULE_AUTHOR("Dawei Chien <dawei.chien at mediatek.com>");
> > >  MODULE_AUTHOR("Sascha Hauer <s.hauer at pengutronix.de>");
> > >  MODULE_AUTHOR("Hanyi Wu <hanyi.wu at mediatek.com>");