Replace the hard-coded values for min/max/passive with values derived from
the CPU temperature grade.
Signed-off-by: Tim Harvey <thar...@gateworks.com>
---
drivers/thermal/imx_thermal.c | 29 +++++++++++++++++++----------
1 file changed, 19 insertions(+), 10 deletions(-)
diff --git a/drivers/thermal/imx_thermal.c b/drivers/thermal/imx_thermal.c
index 0bd9cfd..b5dab63 100644
--- a/drivers/thermal/imx_thermal.c
+++ b/drivers/thermal/imx_thermal.c
@@ -12,15 +12,13 @@
#include <fuse.h>
#include <asm/io.h>
#include <asm/arch/clock.h>
+#include <asm/arch/sys_proto.h>
#include <dm.h>
#include <errno.h>
#include <malloc.h>
#include <thermal.h>
#include <imx_thermal.h>
-#define TEMPERATURE_MIN -40
-#define TEMPERATURE_HOT 80
-#define TEMPERATURE_MAX 125
#define FACTOR0 10000000
#define FACTOR1 15976
#define FACTOR2 4297157
@@ -34,14 +32,21 @@
#define MISC0_REFTOP_SELBIASOFF (1 << 3)
#define TEMPSENSE1_MEASURE_FREQ 0xffff
+struct thermal_data {
+ unsigned int fuse;
+ int passive;
+ int minc;
+ int maxc;
+};
+
static int read_cpu_temperature(struct udevice *dev)
{
int temperature;
unsigned int reg, n_meas;
const struct imx_thermal_plat *pdata = dev_get_platdata(dev);
struct anatop_regs *anatop = (struct anatop_regs *)pdata->regs;
- unsigned int *priv = dev_get_priv(dev);
- u32 fuse = *priv;
+ struct thermal_data *priv = dev_get_priv(dev);
+ u32 fuse = priv->fuse;
int t1, n1;
u32 c1, c2;
u64 temp64;
@@ -119,11 +124,12 @@ static int read_cpu_temperature(struct udevice *dev)
int imx_thermal_get_temp(struct udevice *dev, int *temp)
{
+ struct thermal_data *priv = dev_get_priv(dev);
int cpu_tmp = 0;
cpu_tmp = read_cpu_temperature(dev);
- while (cpu_tmp > TEMPERATURE_MIN && cpu_tmp < TEMPERATURE_MAX) {
- if (cpu_tmp >= TEMPERATURE_HOT) {
+ while (cpu_tmp > priv->minc && cpu_tmp < priv->maxc) {
+ if (cpu_tmp >= priv->passive) {
printf("CPU Temperature is %d C, too hot to boot,
waiting...\n",
cpu_tmp);
udelay(5000000);
@@ -147,7 +153,7 @@ static int imx_thermal_probe(struct udevice *dev)
unsigned int fuse = ~0;
const struct imx_thermal_plat *pdata = dev_get_platdata(dev);
- unsigned int *priv = dev_get_priv(dev);
+ struct thermal_data *priv = dev_get_priv(dev);
/* Read Temperature calibration data fuse */
fuse_read(pdata->fuse_bank, pdata->fuse_word, &fuse);
@@ -158,7 +164,10 @@ static int imx_thermal_probe(struct udevice *dev)
return -EPERM;
}
- *priv = fuse;
+ /* set passive cooling temp to max - 20C */
+ get_cpu_temp_grade(&priv->minc, &priv->maxc);
+ priv->passive = priv->maxc - 20;
+ priv->fuse = fuse;
enable_thermal_clk();
@@ -170,6 +179,6 @@ U_BOOT_DRIVER(imx_thermal) = {
.id = UCLASS_THERMAL,
.ops = &imx_thermal_ops,
.probe = imx_thermal_probe,
- .priv_auto_alloc_size = sizeof(unsigned int),
+ .priv_auto_alloc_size = sizeof(struct thermal_data),
.flags = DM_FLAG_PRE_RELOC,
};
--
1.9.1
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