diff options
Diffstat (limited to 'drivers/thermal/rockchip_thermal.c')
| -rw-r--r-- | drivers/thermal/rockchip_thermal.c | 28 |
1 files changed, 13 insertions, 15 deletions
diff --git a/drivers/thermal/rockchip_thermal.c b/drivers/thermal/rockchip_thermal.c index c89ffb26a354..93ee307b2d9b 100644 --- a/drivers/thermal/rockchip_thermal.c +++ b/drivers/thermal/rockchip_thermal.c @@ -124,7 +124,7 @@ struct rockchip_thermal_data { #define TSADCV2_AUTO_PERIOD_HT_TIME 50 /* msec */ struct tsadc_table { - unsigned long code; + u32 code; long temp; }; @@ -164,7 +164,6 @@ static const struct tsadc_table v2_code_table[] = { {3452, 115000}, {3437, 120000}, {3421, 125000}, - {0, 125000}, }; static u32 rk_tsadcv2_temp_to_code(long temp) @@ -191,19 +190,21 @@ static u32 rk_tsadcv2_temp_to_code(long temp) return 0; } -static int rk_tsadcv2_code_to_temp(u32 code) +static int rk_tsadcv2_code_to_temp(u32 code, int *temp) { - unsigned int low = 0; + unsigned int low = 1; unsigned int high = ARRAY_SIZE(v2_code_table) - 1; unsigned int mid = (low + high) / 2; unsigned int num; unsigned long denom; - /* Invalid code, return -EAGAIN */ - if (code > TSADCV2_DATA_MASK) - return -EAGAIN; + BUILD_BUG_ON(ARRAY_SIZE(v2_code_table) < 2); - while (low <= high && mid) { + code &= TSADCV2_DATA_MASK; + if (code < v2_code_table[high].code) + return -EAGAIN; /* Incorrect reading */ + + while (low <= high) { if (code >= v2_code_table[mid].code && code < v2_code_table[mid - 1].code) break; @@ -223,7 +224,9 @@ static int rk_tsadcv2_code_to_temp(u32 code) num = v2_code_table[mid].temp - v2_code_table[mid - 1].temp; num *= v2_code_table[mid - 1].code - code; denom = v2_code_table[mid - 1].code - v2_code_table[mid].code; - return v2_code_table[mid - 1].temp + (num / denom); + *temp = v2_code_table[mid - 1].temp + (num / denom); + + return 0; } /** @@ -281,14 +284,9 @@ static int rk_tsadcv2_get_temp(int chn, void __iomem *regs, int *temp) { u32 val; - /* the A/D value of the channel last conversion need some time */ val = readl_relaxed(regs + TSADCV2_DATA(chn)); - if (val == 0) - return -EAGAIN; - - *temp = rk_tsadcv2_code_to_temp(val); - return 0; + return rk_tsadcv2_code_to_temp(val, temp); } static void rk_tsadcv2_tshut_temp(int chn, void __iomem *regs, long temp) |