thermal: imx_thermal: use CPU temperature grade for trip points

Replace the hard-coded values for min/max/passive with values derived from
the CPU temperature grade.

Signed-off-by: Tim Harvey <tharvey@gateworks.com>

diff --git a/drivers/thermal/imx_thermal.c b/drivers/thermal/imx_thermal.c
index 0bd9cfd0304587275c2e36d10198280681d7a607..b5dab630ff96dd9d0504743fa654312ebfba74a7 100644 (file)
--- 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,
 };