[PATCH V11 2/6] thermal: of-thermal: Implement signed coefficient support

[Eduardo Valentin]

On Sun, Mar 12, 2017 at 10:11:01PM +0000, Stefan Wahren wrote:
> Use the new function of_property_read_s32_array() to prepare
> of-thermal for negative coefficients. These are used by
> the upcoming bcm2835_thermal driver.
> 
> Signed-off-by: Stefan Wahren <stefan.wahren at i2se.com>
> ---
>  drivers/thermal/of-thermal.c |    5 +++--
>  1 file changed, 3 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/thermal/of-thermal.c b/drivers/thermal/of-thermal.c
> index d04ec3b..491d58a 100644
> --- a/drivers/thermal/of-thermal.c
> +++ b/drivers/thermal/of-thermal.c
> @@ -821,7 +821,8 @@ __init *thermal_of_build_thermal_zone(struct device_node *np)
>  	struct device_node *child = NULL, *gchild;
>  	struct __thermal_zone *tz;
>  	int ret, i;
> -	u32 prop, coef[2];
> +	u32 prop;
> +	s32 coef[2];
>  
>  	if (!np) {
>  		pr_err("no thermal zone np\n");
> @@ -851,7 +852,7 @@ __init *thermal_of_build_thermal_zone(struct device_node *np)
>  	 * one sensor per thermal zone. Thus, we are considering
>  	 * only the first two values as slope and offset.
>  	 */
> -	ret = of_property_read_u32_array(np, "coefficients", coef, 2);
> +	ret = of_property_read_s32_array(np, "coefficients", coef, 2);

For the scope of the proposed change I see not problem with this patch.

However, this needs to go in after the of core change gets accepted.
Alternatively, I could take the full series if you get an Ack from OF
maintainers.

>  	if (ret == 0) {
>  		tz->slope = coef[0];
>  		tz->offset = coef[1];
> -- 
> 1.7.9.5
>