4.9-stable patches

added patches:
	thermal-drivers-hisi-simplify-the-temperature-step-computation.patch

diff --git a/queue-4.9/series b/queue-4.9/series
index 7b74af73776c39013e8a322eb91c9298f9b7d421..0044c37f7ef24c4731a2754fc0e2c14dccd6dee9 100644 (file)
--- a/queue-4.9/series
+++ b/queue-4.9/series
@@ -115,4 +115,5 @@ x86-kvm-vmx-remove-unused-variable-in-segment_base.patch
 thermal-hisilicon-handle-return-value-of-clk_prepare_enable.patch
 thermal-drivers-hisi-fix-missing-interrupt-enablement.patch
 thermal-drivers-hisi-fix-kernel-panic-on-alarm-interrupt.patch
+thermal-drivers-hisi-simplify-the-temperature-step-computation.patch
 thermal-drivers-hisi-fix-multiple-alarm-interrupts-firing.patch

diff --git a/queue-4.9/thermal-drivers-hisi-fix-multiple-alarm-interrupts-firing.patch b/queue-4.9/thermal-drivers-hisi-fix-multiple-alarm-interrupts-firing.patch
index 9e2ae279027f403c132931b5ea6207f8802f1307..690a3d7d7a1da7ff2e2986b1d2af94fb1db9039f 100644 (file)
--- a/queue-4.9/thermal-drivers-hisi-fix-multiple-alarm-interrupts-firing.patch
+++ b/queue-4.9/thermal-drivers-hisi-fix-multiple-alarm-interrupts-firing.patch
@@ -43,8 +43,8 @@ Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 
 --- a/drivers/thermal/hisi_thermal.c
 +++ b/drivers/thermal/hisi_thermal.c
-@@ -76,6 +76,12 @@ static inline long _temp_to_step(long te
-       return ((temp - HISI_TEMP_BASE * 1000) * 255) / 200000;
+@@ -90,6 +90,12 @@ static inline long hisi_thermal_temp_to_
+       return (temp - HISI_TEMP_BASE) / HISI_TEMP_STEP;
  }
  
 +static inline long hisi_thermal_round_temp(int temp)
@@ -56,7 +56,7 @@ Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
  static long hisi_thermal_get_sensor_temp(struct hisi_thermal_data *data,
                                         struct hisi_thermal_sensor *sensor)
  {
-@@ -230,7 +236,7 @@ static irqreturn_t hisi_thermal_alarm_ir
+@@ -245,7 +251,7 @@ static irqreturn_t hisi_thermal_alarm_ir
        sensor = &data->sensors[data->irq_bind_sensor];
  
        dev_crit(&data->pdev->dev, "THERMAL ALARM: T > %d\n",
@@ -65,7 +65,7 @@ Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
        mutex_unlock(&data->thermal_lock);
  
        for (i = 0; i < HISI_MAX_SENSORS; i++) {
-@@ -269,7 +275,7 @@ static int hisi_thermal_register_sensor(
+@@ -284,7 +290,7 @@ static int hisi_thermal_register_sensor(
  
        for (i = 0; i < of_thermal_get_ntrips(sensor->tzd); i++) {
                if (trip[i].type == THERMAL_TRIP_PASSIVE) {

diff --git a/queue-4.9/thermal-drivers-hisi-simplify-the-temperature-step-computation.patch b/queue-4.9/thermal-drivers-hisi-simplify-the-temperature-step-computation.patch
new file mode 100644 (file)
index 0000000..d623061
--- /dev/null
+++ b/queue-4.9/thermal-drivers-hisi-simplify-the-temperature-step-computation.patch
@@ -0,0 +1,106 @@
+From 48880b979cdc9ef5a70af020f42b8ba1e51dbd34 Mon Sep 17 00:00:00 2001
+From: Daniel Lezcano <daniel.lezcano@linaro.org>
+Date: Thu, 19 Oct 2017 19:05:46 +0200
+Subject: thermal/drivers/hisi: Simplify the temperature/step computation
+
+From: Daniel Lezcano <daniel.lezcano@linaro.org>
+
+commit 48880b979cdc9ef5a70af020f42b8ba1e51dbd34 upstream.
+
+The step and the base temperature are fixed values, we can simplify the
+computation by converting the base temperature to milli celsius and use a
+pre-computed step value. That saves us a lot of mult + div for nothing at
+runtime.
+
+Take also the opportunity to change the function names to be consistent with
+the rest of the code.
+
+Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
+Reviewed-by: Leo Yan <leo.yan@linaro.org>
+Tested-by: Leo Yan <leo.yan@linaro.org>
+Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
+Signed-off-by: Kevin Wangtao <kevin.wangtao@hisilicon.com>
+Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+
+---
+ drivers/thermal/hisi_thermal.c |   41 ++++++++++++++++++++++++++++-------------
+ 1 file changed, 28 insertions(+), 13 deletions(-)
+
+--- a/drivers/thermal/hisi_thermal.c
++++ b/drivers/thermal/hisi_thermal.c
+@@ -35,8 +35,9 @@
+ #define TEMP0_RST_MSK                 (0x1C)
+ #define TEMP0_VALUE                   (0x28)
+ 
+-#define HISI_TEMP_BASE                        (-60)
++#define HISI_TEMP_BASE                        (-60000)
+ #define HISI_TEMP_RESET                       (100000)
++#define HISI_TEMP_STEP                        (784)
+ 
+ #define HISI_MAX_SENSORS              4
+ 
+@@ -61,19 +62,32 @@ struct hisi_thermal_data {
+       void __iomem *regs;
+ };
+ 
+-/* in millicelsius */
+-static inline int _step_to_temp(int step)
++/*
++ * The temperature computation on the tsensor is as follow:
++ *    Unit: millidegree Celsius
++ *    Step: 255/200 (0.7843)
++ *    Temperature base: -60°C
++ *
++ * The register is programmed in temperature steps, every step is 784
++ * millidegree and begins at -60 000 m°C
++ *
++ * The temperature from the steps:
++ *
++ *    Temp = TempBase + (steps x 784)
++ *
++ * and the steps from the temperature:
++ *
++ *    steps = (Temp - TempBase) / 784
++ *
++ */
++static inline int hisi_thermal_step_to_temp(int step)
+ {
+-      /*
+-       * Every step equals (1 * 200) / 255 celsius, and finally
+-       * need convert to millicelsius.
+-       */
+-      return (HISI_TEMP_BASE * 1000 + (step * 200000 / 255));
++      return HISI_TEMP_BASE + (step * HISI_TEMP_STEP);
+ }
+ 
+-static inline long _temp_to_step(long temp)
++static inline long hisi_thermal_temp_to_step(long temp)
+ {
+-      return ((temp - HISI_TEMP_BASE * 1000) * 255) / 200000;
++      return (temp - HISI_TEMP_BASE) / HISI_TEMP_STEP;
+ }
+ 
+ static long hisi_thermal_get_sensor_temp(struct hisi_thermal_data *data,
+@@ -99,7 +113,7 @@ static long hisi_thermal_get_sensor_temp
+       usleep_range(3000, 5000);
+ 
+       val = readl(data->regs + TEMP0_VALUE);
+-      val = _step_to_temp(val);
++      val = hisi_thermal_step_to_temp(val);
+ 
+       mutex_unlock(&data->thermal_lock);
+ 
+@@ -126,10 +140,11 @@ static void hisi_thermal_enable_bind_irq
+       writel((sensor->id << 12), data->regs + TEMP0_CFG);
+ 
+       /* enable for interrupt */
+-      writel(_temp_to_step(sensor->thres_temp) | 0x0FFFFFF00,
++      writel(hisi_thermal_temp_to_step(sensor->thres_temp) | 0x0FFFFFF00,
+              data->regs + TEMP0_TH);
+ 
+-      writel(_temp_to_step(HISI_TEMP_RESET), data->regs + TEMP0_RST_TH);
++      writel(hisi_thermal_temp_to_step(HISI_TEMP_RESET),
++             data->regs + TEMP0_RST_TH);
+ 
+       /* enable module */
+       writel(0x1, data->regs + TEMP0_RST_MSK);