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| author | Anson Huang <b20788@freescale.com> | 2012-09-06 15:34:07 +0800 |
|---|---|---|
| committer | Anson Huang <b20788@freescale.com> | 2012-09-06 15:58:15 +0800 |
| commit | d5445135db7b12e229b678fb8ed6dc7606b36cfe (patch) | |
| tree | 41d48843aeb2efb8ed5d6dc8536f986036f86b9b | |
| parent | 34424c323c0d4b3aa836bab449e3475ffe0bb59f (diff) | |
| download | u-boot-imx-d5445135db7b12e229b678fb8ed6dc7606b36cfe.zip u-boot-imx-d5445135db7b12e229b678fb8ed6dc7606b36cfe.tar.gz u-boot-imx-d5445135db7b12e229b678fb8ed6dc7606b36cfe.tar.bz2 | |
ENGR00223236-1 [MX6]Change the temperature range to -40C ~ 125C
Previous temperature range is -25C ~ 125C, according to latest
datasheet, change it to -40C to 125C.
Fix temperature report error when it is < 0C.
Signed-off-by: Anson Huang <b20788@freescale.com>
| -rw-r--r-- | cpu/arm_cortexa8/mx6/generic.c | 13 |
1 files changed, 7 insertions, 6 deletions
diff --git a/cpu/arm_cortexa8/mx6/generic.c b/cpu/arm_cortexa8/mx6/generic.c index 60c87c7..6a98d04 100644 --- a/cpu/arm_cortexa8/mx6/generic.c +++ b/cpu/arm_cortexa8/mx6/generic.c @@ -101,10 +101,10 @@ enum pll_clocks { #endif #define OCOTP_THERMAL_OFFSET 0x4E0 -#define TEMPERATURE_MIN -25 +#define TEMPERATURE_MIN -40 #define TEMPERATURE_HOT 80 #define TEMPERATURE_MAX 125 -#define REG_VALUE_TO_CEL(ratio, raw) ((raw_n25c - raw) * 100 / ratio - 25) +#define REG_VALUE_TO_CEL(ratio, raw) ((raw_n40c - raw) * 100 / ratio - 40) static int cpu_tmp; static unsigned int fuse; @@ -859,9 +859,10 @@ int clk_config(u32 ref, u32 freq, u32 clk_type) static inline int read_cpu_temperature(void) { - unsigned int reg, tmp, temperature, i; - unsigned int raw_25c, raw_hot, hot_temp, raw_n25c, ratio; + unsigned int reg, tmp, i; + unsigned int raw_25c, raw_hot, hot_temp, raw_n40c, ratio; unsigned int ccm_ccgr2; + int temperature; ccm_ccgr2 = readl(MXC_CCM_CCGR2); writel(readl(MXC_CCM_CCGR2) | (0x3 << MXC_CCM_CCGR2_CG6_OFFSET), @@ -880,7 +881,7 @@ static inline int read_cpu_temperature(void) hot_temp = fuse & 0xff; ratio = ((raw_25c - raw_hot) * 100) / (hot_temp - 25); - raw_n25c = raw_25c + ratio / 2; + raw_n40c = raw_25c + (13 * ratio) / 20; /* now we only using single measure, every time we measure the temperature, we will power on/down the anadig module*/ @@ -916,7 +917,7 @@ static inline int read_cpu_temperature(void) } tmp = tmp / 5; - if (tmp <= raw_n25c) + if (tmp <= raw_n40c) temperature = REG_VALUE_TO_CEL(ratio, tmp); else temperature = TEMPERATURE_MIN; |