linux-kernel - Re: [PATCH] thermal: tegra_soctherm: fix sign bit of temperature

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Date:	Wed, 2 Mar 2016 15:40:46 +0800
From:	Wei Ni <wni@...dia.com>
To:	<thierry.reding@...il.com>, <rui.zhang@...el.com>,
	<MLongnecker@...dia.com>, <mikko.perttunen@...si.fi>
CC:	<swarren@...dotorg.org>, <linux-tegra@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] thermal: tegra_soctherm: fix sign bit of temperature

Hi, Rui & Thierry & Matt
Could you please take a look on this patch.
It's a bug on the temperature's sign bit, it can't show the negative
temperature, although it will not cause problems for now.

Thanks.
Wei.

On 2016年02月29日 17:51, Wei Ni wrote:
> The sign bit of temperature readback is bit 0, not bit 1.
> Change to BIT(0) to fix it.
> 
> Signed-off-by: Wei Ni <wni@...dia.com>
> ---
>  drivers/thermal/tegra_soctherm.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/thermal/tegra_soctherm.c b/drivers/thermal/tegra_soctherm.c
> index 74ea5765938b..136975220c92 100644
> --- a/drivers/thermal/tegra_soctherm.c
> +++ b/drivers/thermal/tegra_soctherm.c
> @@ -57,7 +57,7 @@
>  #define READBACK_VALUE_MASK			0xff00
>  #define READBACK_VALUE_SHIFT			8
>  #define READBACK_ADD_HALF			BIT(7)
> -#define READBACK_NEGATE				BIT(1)
> +#define READBACK_NEGATE				BIT(0)
>  
>  #define FUSE_TSENSOR8_CALIB			0x180
>  #define FUSE_SPARE_REALIGNMENT_REG_0		0x1fc
>