diff options
| author | Peng Fan <Peng.Fan@freescale.com> | 2015-12-17 11:09:34 +0800 |
|---|---|---|
| committer | Max Krummenacher <max.krummenacher@toradex.com> | 2016-06-22 14:36:38 +0200 |
| commit | 57d1a7d2466ae898afd902b0f53cb6e2d351b3c6 (patch) | |
| tree | d6141df3f5352448ffa52677b20e169066825e44 /drivers | |
| parent | 4d4cb0919148918e298e1ffcd027de2fd09e609b (diff) | |
MLK-12030: imx: mx7d: fix the temperature checking for TO1.1
We can rely on finish bit for temperature reading for TO1.1.
Also introduce CHIP_REV_xx macros for 7D.
Signed-off-by: Peng Fan <Peng.Fan@freescale.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/thermal/imx_thermal.c | 33 |
1 files changed, 24 insertions, 9 deletions
diff --git a/drivers/thermal/imx_thermal.c b/drivers/thermal/imx_thermal.c index 5d7a1a8d357..5a1caf28718 100644 --- a/drivers/thermal/imx_thermal.c +++ b/drivers/thermal/imx_thermal.c @@ -12,6 +12,8 @@ #include <fuse.h> #include <asm/io.h> #include <asm/arch/clock.h> +#include <asm/arch/imx-regs.h> +#include <asm/arch/sys_proto.h> #include <dm.h> #include <errno.h> #include <malloc.h> @@ -126,6 +128,7 @@ static int read_cpu_temperature(struct udevice *dev) #define TEMPERATURE_HOT 85 #define TEMPERATURE_MAX 125 #define MEASURE_FREQ 327 +#define TEMPSENSE1_FINISHED (1 << 11) static int read_cpu_temperature(struct udevice *dev) { @@ -168,18 +171,30 @@ static int read_cpu_temperature(struct udevice *dev) writel(TEMPMON_HW_ANADIG_TEMPSENSE1_FINISHED_MASK, &ccm_anatop->tempsense1_clr); writel(TEMPMON_HW_ANADIG_TEMPSENSE1_MEASURE_TEMP_MASK, &ccm_anatop->tempsense1_set); - start = get_timer(0); - /* Wait max 100ms */ - do { - /* - * Since we can not rely on finish bit, use 1ms delay to get - * temperature. From RM, 17us is enough to get data, but - * to gurantee to get the data, delay 100ms here. - */ + if (is_soc_rev(CHIP_REV_1_1) >= 0) { + /* make sure that the latest temp is valid */ + while ((readl(&ccm_anatop->tempsense1) & + TEMPMON_HW_ANADIG_TEMPSENSE1_FINISHED_MASK) == 0) + udelay(10000); reg = readl(&ccm_anatop->tempsense1); tmp = (reg & TEMPMON_HW_ANADIG_TEMPSENSE1_TEMP_VALUE_MASK) >> TEMPMON_HW_ANADIG_TEMPSENSE1_TEMP_VALUE_SHIFT; - } while (get_timer(0) < (start + 100)); + } else { + start = get_timer(0); + /* Wait max 100ms */ + do { + /* + * Since we can not rely on finish bit, use 100ms + * delay to get temperature. From RM, 17us is + * enough to get data, but to gurantee to get + * the data, delay 100ms here. + */ + reg = readl(&ccm_anatop->tempsense1); + tmp = (reg & + TEMPMON_HW_ANADIG_TEMPSENSE1_TEMP_VALUE_MASK) + >> TEMPMON_HW_ANADIG_TEMPSENSE1_TEMP_VALUE_SHIFT; + } while (get_timer(0) < (start + 100)); + } writel(TEMPMON_HW_ANADIG_TEMPSENSE1_FINISHED_MASK, &ccm_anatop->tempsense1_clr); |