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| 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 16:02:26 +0200 |
| commit | 95cd0713e64b5a2c920685c601bf98c3a292843c (patch) | |
| tree | 86b0f148dc65263eba94ccada09221f8d41d9d32 | |
| parent | 62ff270f181a11e2a6545172babcf9b9dc8bf8eb (diff) | |
| download | linux-stable-95cd0713e64b5a2c920685c601bf98c3a292843c.tar.gz linux-stable-95cd0713e64b5a2c920685c601bf98c3a292843c.tar.bz2 linux-stable-95cd0713e64b5a2c920685c601bf98c3a292843c.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>
| -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 75c69fe6e955..c02922d2d1d5 100644 --- a/drivers/thermal/rcar_gen3_thermal.c +++ b/drivers/thermal/rcar_gen3_thermal.c @@ -142,7 +142,7 @@ 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]), |