On 四, 2014-04-24 at 11:48 +0530, Amit Kachhap wrote:
> On 4/14/14, Tushar Behera <tushar.behera@xxxxxxxxxx> wrote:
> > Currently the threshold limits are updated in 2 stages, once for all
> > software trigger levels and again for hardware trip point.
> I guess the first stage is bootloader as could not find this in this file.
> Anyways the changes looks fine to me.
>
> Acked-by: Amit Daniel Kachhap <amit.daniel@xxxxxxxxxxx>
applied.
thanks,
rui
>
> >
> > While updating the software trigger levels, it overwrites the threshold
> > limit for hardware trip point thereby forcing the Exynos core to issue
> > an emergency shutdown.
> >
> > Updating only the required fields in threshold register fixes this issue.
> >
> > Signed-off-by: Tushar Behera <tushar.behera@xxxxxxxxxx>
> > ---
> > Based on v3.15-rc1.
> >
> > drivers/thermal/samsung/exynos_tmu.c | 4 ++++
> > 1 file changed, 4 insertions(+)
> >
> > diff --git a/drivers/thermal/samsung/exynos_tmu.c
> > b/drivers/thermal/samsung/exynos_tmu.c
> > index 0d96a51..ffccc89 100644
> > --- a/drivers/thermal/samsung/exynos_tmu.c
> > +++ b/drivers/thermal/samsung/exynos_tmu.c
> > @@ -225,6 +225,8 @@ skip_calib_data:
> > trigger_levs++;
> > }
> >
> > + rising_threshold = readl(data->base + reg->threshold_th0);
> > +
> > if (data->soc == SOC_ARCH_EXYNOS4210) {
> > /* Write temperature code for threshold */
> > threshold_code = temp_to_code(data, pdata->threshold);
> > @@ -249,6 +251,7 @@ skip_calib_data:
> > ret = threshold_code;
> > goto out;
> > }
> > + rising_threshold &= ~(0xff << 8 * i);
> > rising_threshold |= threshold_code << 8 * i;
> > if (pdata->threshold_falling) {
> > threshold_code = temp_to_code(data,
> > @@ -281,6 +284,7 @@ skip_calib_data:
> > }
> > if (i == EXYNOS_MAX_TRIGGER_PER_REG - 1) {
> > /* 1-4 level to be assigned in th0 reg */
> > + rising_threshold &= ~(0xff << 8 * i);
> > rising_threshold |= threshold_code << 8 * i;
> > writel(rising_threshold,
> > data->base + reg->threshold_th0);
> > --
> > 1.7.9.5
> >
> > --
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