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| author | Tim Harvey <tharvey@gateworks.com> | 2015-05-18 06:56:47 -0700 |
|---|---|---|
| committer | Stefano Babic <sbabic@denx.de> | 2015-05-19 15:31:49 +0200 |
| commit | a91db95479e75c70ec49676e9a347787b054d651 (patch) | |
| tree | a83480300fd0bad054eda19c075565c3911ac04e | |
| parent | 70caa8e21d3e2393571981631f9b87c253e2ac29 (diff) | |
| download | u-boot-imx-a91db95479e75c70ec49676e9a347787b054d651.zip u-boot-imx-a91db95479e75c70ec49676e9a347787b054d651.tar.gz u-boot-imx-a91db95479e75c70ec49676e9a347787b054d651.tar.bz2 | |
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>
| -rw-r--r-- | drivers/thermal/imx_thermal.c | 29 |
1 files 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, }; |