linux-kernel - RE: [PATCH v2] thermal: qoriq: Update the settings for TMUv2

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Message-ID: <DBBPR04MB60904584EBDB9E2577C5016CF3A50@DBBPR04MB6090.eurprd04.prod.outlook.com>
Date:   Thu, 7 May 2020 06:20:37 +0000
From:   Andy Tang <andy.tang@....com>
To:     Andy Tang <andy.tang@....com>,
        "rui.zhang@...el.com" <rui.zhang@...el.com>,
        "edubezval@...il.com" <edubezval@...il.com>,
        "daniel.lezcano@...aro.org" <daniel.lezcano@...aro.org>
CC:     "linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH v2] thermal: qoriq: Update the settings for TMUv2

PING.

BR,
Andy

> -----Original Message-----
> From: Yuantian Tang <andy.tang@....com>
> Sent: 2020年4月16日 17:40
> To: rui.zhang@...el.com; edubezval@...il.com; daniel.lezcano@...aro.org
> Cc: linux-pm@...r.kernel.org; linux-kernel@...r.kernel.org; Andy Tang
> <andy.tang@....com>
> Subject: [PATCH v2] thermal: qoriq: Update the settings for TMUv2
> 
> For TMU v2, TMSAR registers need to be set properly to get the accurate
> temperature values.
> Also temperature reading needs to convert to degree Celsius since it is in
> degrees Kelvin.
> 
> Signed-off-by: Yuantian Tang <andy.tang@....com>
> ---
> v2:
> 	- change the temp in millicelsius
> 
>  drivers/thermal/qoriq_thermal.c | 15 ++++++++++++++-
>  1 file changed, 14 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/thermal/qoriq_thermal.c
> b/drivers/thermal/qoriq_thermal.c index 028a6bbf75dc..f6371127f707
> 100644
> --- a/drivers/thermal/qoriq_thermal.c
> +++ b/drivers/thermal/qoriq_thermal.c
> @@ -23,6 +23,7 @@
>  #define TMTMIR_DEFAULT	0x0000000f
>  #define TIER_DISABLE	0x0
>  #define TEUMR0_V2		0x51009c00
> +#define TMSARA_V2		0xe
>  #define TMU_VER1		0x1
>  #define TMU_VER2		0x2
> 
> @@ -50,6 +51,9 @@
>  					    * Site Register
>  					    */
>  #define TRITSR_V	BIT(31)
> +#define REGS_V2_TMSAR(n)	(0x304 + 16 * (n))	/* TMU monitoring
> +						* site adjustment register
> +						*/
>  #define REGS_TTRnCR(n)	(0xf10 + 4 * (n)) /* Temperature Range n
>  					   * Control Register
>  					   */
> @@ -100,7 +104,11 @@ static int tmu_get_temp(void *p, int *temp)
>  				     10 * USEC_PER_MSEC))
>  		return -ENODATA;
> 
> -	*temp = (val & 0xff) * 1000;
> +	/* For TMUv2, temperature reading in degrees Kelvin */
> +	if (qdata->ver == TMU_VER1)
> +		*temp = (val & 0xff) * 1000;
> +	else
> +		*temp = ((val & 0x1ff) - 273) * 1000;
> 
>  	return 0;
>  }
> @@ -192,6 +200,8 @@ static int qoriq_tmu_calibration(struct device *dev,
> 
>  static void qoriq_tmu_init_device(struct qoriq_tmu_data *data)  {
> +	int i;
> +
>  	/* Disable interrupt, using polling instead */
>  	regmap_write(data->regmap, REGS_TIER, TIER_DISABLE);
> 
> @@ -202,6 +212,8 @@ static void qoriq_tmu_init_device(struct
> qoriq_tmu_data *data)
>  	} else {
>  		regmap_write(data->regmap, REGS_V2_TMTMIR,
> TMTMIR_DEFAULT);
>  		regmap_write(data->regmap, REGS_V2_TEUMR(0), TEUMR0_V2);
> +		for (i = 0; i < 7; i++)
> +			regmap_write(data->regmap, REGS_V2_TMSAR(i),
> TMSARA_V2);
>  	}
> 
>  	/* Disable monitoring */
> @@ -212,6 +224,7 @@ static const struct regmap_range qoriq_yes_ranges[]
> = {
>  	regmap_reg_range(REGS_TMR, REGS_TSCFGR),
>  	regmap_reg_range(REGS_TTRnCR(0), REGS_TTRnCR(3)),
>  	regmap_reg_range(REGS_V2_TEUMR(0), REGS_V2_TEUMR(2)),
> +	regmap_reg_range(REGS_V2_TMSAR(0), REGS_V2_TMSAR(15)),
>  	regmap_reg_range(REGS_IPBRR(0), REGS_IPBRR(1)),
>  	/* Read only registers below */
>  	regmap_reg_range(REGS_TRITSR(0), REGS_TRITSR(15)),
> --
> 2.17.1