diff options
| author | Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se> | 2021-06-05 10:52:11 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-07-20 16:00:40 +0200 |
| commit | 2292bba57bb6c67ecc5223a616d809519eabac80 (patch) | |
| tree | a6ae01770f0c5fe3e92f0f7020e45e5660d65c0b /drivers/thermal | |
| parent | 31402780830329bb8049eafcb023b6ebcf16e5ab (diff) | |
| download | linux-stable-2292bba57bb6c67ecc5223a616d809519eabac80.tar.gz linux-stable-2292bba57bb6c67ecc5223a616d809519eabac80.tar.bz2 linux-stable-2292bba57bb6c67ecc5223a616d809519eabac80.zip | |
thermal/drivers/rcar_gen3_thermal: Fix coefficient calculations
[ Upstream commit 8946187ab57ffd02088e50256c73dd31f49db06d ]
The fixed value of 157 used in the calculations are only correct for
M3-W, on other Gen3 SoC it should be 167. The constant can be derived
correctly from the static TJ_3 constant and the SoC specific TJ_1 value.
Update the calculation be correct on all Gen3 SoCs.
Fixes: 4eb39f79ef44 ("thermal: rcar_gen3_thermal: Update value of Tj_1")
Reported-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Reviewed-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20210605085211.564909-1-niklas.soderlund+renesas@ragnatech.se
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/thermal')
| -rw-r--r-- | drivers/thermal/rcar_gen3_thermal.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/thermal/rcar_gen3_thermal.c b/drivers/thermal/rcar_gen3_thermal.c index e1e412348076..1a60adb1d30a 100644 --- a/drivers/thermal/rcar_gen3_thermal.c +++ b/drivers/thermal/rcar_gen3_thermal.c @@ -143,7 +143,7 @@ static void rcar_gen3_thermal_calc_coefs(struct rcar_gen3_thermal_tsc *tsc, * Division is not scaled in BSP and if scaled it might overflow * the dividend (4095 * 4095 << 14 > INT_MAX) so keep it unscaled */ - tsc->tj_t = (FIXPT_INT((ptat[1] - ptat[2]) * 157) + tsc->tj_t = (FIXPT_INT((ptat[1] - ptat[2]) * (ths_tj_1 - TJ_3)) / (ptat[0] - ptat[2])) + FIXPT_INT(TJ_3); tsc->coef.a1 = FIXPT_DIV(FIXPT_INT(thcode[1] - thcode[2]), |