linux-kernel - Re: [PATCH] driver: adm1275: set the m,b and R coefficients correctly for power

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Date:   Mon, 27 Mar 2017 19:44:49 -0700
From:   Guenter Roeck <linux@...ck-us.net>
To:     Shikhar Dogra <shidogra@...co.com>, jdelvare@...e.com,
        linux-hwmon@...r.kernel.org
Cc:     xe-linux-external@...co.com, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] driver: adm1275: set the m,b and R coefficients correctly
 for power

On 03/27/2017 04:16 PM, Shikhar Dogra wrote:
> Seems like coefficient values for m, b and R under power have been
> put in the wrong order. Rearranging them properly to get correct
> values of coefficients for power.
>

Oops :-(

Thanks a lot, applied.

Guenter

> For specs, please refer to table 7 (page 35) on
> http://www.analog.com/media/en/technical-documentation/data-sheets/ADM1075.pdf
>
> Fixes: 904b296f308d ("hwmon: (adm1275) Introduce configuration data structure for coeffcients")
> Signed-off-by: Shikhar Dogra <shidogra@...co.com>
> Cc: xe-linux-external@...co.com
> Cc: Guenter Roeck <linux@...ck-us.net>
> Cc: Jean Delvare <jdelvare@...e.com>
> Cc: linux-hwmon@...r.kernel.org
> Cc: linux-kernel@...r.kernel.org
> ---
>  drivers/hwmon/pmbus/adm1275.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/hwmon/pmbus/adm1275.c b/drivers/hwmon/pmbus/adm1275.c
> index 188af4c..18477dd 100644
> --- a/drivers/hwmon/pmbus/adm1275.c
> +++ b/drivers/hwmon/pmbus/adm1275.c
> @@ -95,8 +95,8 @@ static const struct coefficients adm1075_coefficients[] = {
>  	[0] = { 27169, 0, -1 },		/* voltage */
>  	[1] = { 806, 20475, -1 },	/* current, irange25 */
>  	[2] = { 404, 20475, -1 },	/* current, irange50 */
> -	[3] = { 0, -1, 8549 },		/* power, irange25 */
> -	[4] = { 0, -1, 4279 },		/* power, irange50 */
> +	[3] = { 8549, 0, -1 },		/* power, irange25 */
> +	[4] = { 4279, 0, -1 },		/* power, irange50 */
>  };
>
>  static const struct coefficients adm1275_coefficients[] = {
>