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| author | Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se> | 2017-03-29 20:43:51 +0200 |
|---|---|---|
| committer | Eduardo Valentin <edubezval@gmail.com> | 2017-03-30 21:40:46 -0700 |
| commit | 100cfbcf2580b0605f50af32fefd9c8d1d8357fb (patch) | |
| tree | 393adceb159164d023c8ddb930bdef5201c1841e /drivers/thermal/rcar_gen3_thermal.c | |
| parent | 78aefd2d5911c4e0b5dc0b0578b3b8c7673be1d2 (diff) | |
| download | linux-100cfbcf2580b0605f50af32fefd9c8d1d8357fb.tar.bz2 | |
thermal: rcar_gen3_thermal: remove unneeded mutex
There is no point in protecting a register read with a lock. This is
most likely a leftover from when the driver was reworked before being
submitted for upstream.
Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
Diffstat (limited to 'drivers/thermal/rcar_gen3_thermal.c')
| -rw-r--r-- | drivers/thermal/rcar_gen3_thermal.c | 7 |
1 files changed, 0 insertions, 7 deletions
diff --git a/drivers/thermal/rcar_gen3_thermal.c b/drivers/thermal/rcar_gen3_thermal.c index ec477d47d0ba..cb5c362c0000 100644 --- a/drivers/thermal/rcar_gen3_thermal.c +++ b/drivers/thermal/rcar_gen3_thermal.c @@ -20,7 +20,6 @@ #include <linux/interrupt.h> #include <linux/io.h> #include <linux/module.h> -#include <linux/mutex.h> #include <linux/of_device.h> #include <linux/platform_device.h> #include <linux/pm_runtime.h> @@ -72,7 +71,6 @@ struct rcar_gen3_thermal_tsc { void __iomem *base; struct thermal_zone_device *zone; struct equation_coefs coef; - struct mutex lock; }; struct rcar_gen3_thermal_priv { @@ -163,16 +161,12 @@ static int rcar_gen3_thermal_get_temp(void *devdata, int *temp) u32 reg; /* Read register and convert to mili Celsius */ - mutex_lock(&tsc->lock); - reg = rcar_gen3_thermal_read(tsc, REG_GEN3_TEMP) & CTEMP_MASK; val1 = FIXPT_DIV(FIXPT_INT(reg) - tsc->coef.b1, tsc->coef.a1); val2 = FIXPT_DIV(FIXPT_INT(reg) - tsc->coef.b2, tsc->coef.a2); mcelsius = FIXPT_TO_MCELSIUS((val1 + val2) / 2); - mutex_unlock(&tsc->lock); - /* Make sure we are inside specifications */ if ((mcelsius < MCELSIUS(-40)) || (mcelsius > MCELSIUS(125))) return -EIO; @@ -299,7 +293,6 @@ static int rcar_gen3_thermal_probe(struct platform_device *pdev) } priv->tscs[i] = tsc; - mutex_init(&tsc->lock); match_data->thermal_init(tsc); rcar_gen3_thermal_calc_coefs(&tsc->coef, ptat, thcode[i]); |