linux-kernel - Re: [PATCH 2/2] hwmon: (gsc): add 16bit pre-scaled voltage mode

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Message-ID: <5ec904cf-d950-6214-e0b3-65b229402ba1@roeck-us.net>
Date:   Thu, 11 Jun 2020 06:47:58 -0700
From:   Guenter Roeck <linux@...ck-us.net>
To:     Tim Harvey <tharvey@...eworks.com>,
        Rob Herring <robh+dt@...nel.org>,
        Jean Delvare <jdelvare@...e.com>
Cc:     Lee Jones <lee.jones@...aro.org>,
        Robert Jones <rjones@...eworks.com>,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-hwmon@...r.kernel.org
Subject: Re: [PATCH 2/2] hwmon: (gsc): add 16bit pre-scaled voltage mode

On 6/9/20 7:57 AM, Tim Harvey wrote:
> add a 16-bit pre-scaled voltage mode to adc and clarify that existing
> pre-scaled mode is 24bit.
> 
> Signed-off-by: Tim Harvey <tharvey@...eworks.com>

For my reference:

Reviewed-by: Guenter Roeck <linux@...ck-us.net>

We'll have to wait for DT approval.

Guenter

> ---
>  drivers/hwmon/gsc-hwmon.c               | 8 +++++---
>  include/linux/platform_data/gsc_hwmon.h | 3 ++-
>  2 files changed, 7 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/hwmon/gsc-hwmon.c b/drivers/hwmon/gsc-hwmon.c
> index 2137bc6..3dfe2ca 100644
> --- a/drivers/hwmon/gsc-hwmon.c
> +++ b/drivers/hwmon/gsc-hwmon.c
> @@ -159,7 +159,7 @@ gsc_hwmon_read(struct device *dev, enum hwmon_sensor_types type, u32 attr,
>  		return -EOPNOTSUPP;
>  	}
>  
> -	sz = (ch->mode == mode_voltage) ? 3 : 2;
> +	sz = (ch->mode == mode_voltage_24bit) ? 3 : 2;
>  	ret = regmap_bulk_read(hwmon->regmap, ch->reg, buf, sz);
>  	if (ret)
>  		return ret;
> @@ -186,7 +186,8 @@ gsc_hwmon_read(struct device *dev, enum hwmon_sensor_types type, u32 attr,
>  		/* adjust by uV offset */
>  		tmp += ch->mvoffset;
>  		break;
> -	case mode_voltage:
> +	case mode_voltage_24bit:
> +	case mode_voltage_16bit:
>  		/* no adjustment needed */
>  		break;
>  	}
> @@ -336,7 +337,8 @@ static int gsc_hwmon_probe(struct platform_device *pdev)
>  						     HWMON_T_LABEL;
>  			i_temp++;
>  			break;
> -		case mode_voltage:
> +		case mode_voltage_24bit:
> +		case mode_voltage_16bit:
>  		case mode_voltage_raw:
>  			if (i_in == GSC_HWMON_MAX_IN_CH) {
>  				dev_err(gsc->dev, "too many input channels\n");
> diff --git a/include/linux/platform_data/gsc_hwmon.h b/include/linux/platform_data/gsc_hwmon.h
> index ec1611a..37a8f554d 100644
> --- a/include/linux/platform_data/gsc_hwmon.h
> +++ b/include/linux/platform_data/gsc_hwmon.h
> @@ -4,8 +4,9 @@
>  
>  enum gsc_hwmon_mode {
>  	mode_temperature,
> -	mode_voltage,
> +	mode_voltage_24bit,
>  	mode_voltage_raw,
> +	mode_voltage_16bit,
>  	mode_max,
>  };
>  
>