The RK3368 SoCs support to 2 channel TS-ADC, the temperature criteria of each channel can be configurable.
The system has two Temperature Sensors, channel 0 is for CPU, and channel 1 is for GPU. Signed-off-by: Caesar Wang <[email protected]> --- Changes in v1: - As Dmitry comment, make the conversion table in as a parameter. drivers/thermal/rockchip_thermal.c | 183 ++++++++++++++++++++++++++++++++----- 1 file changed, 158 insertions(+), 25 deletions(-) diff --git a/drivers/thermal/rockchip_thermal.c b/drivers/thermal/rockchip_thermal.c index f96c151..4748a8e 100644 --- a/drivers/thermal/rockchip_thermal.c +++ b/drivers/thermal/rockchip_thermal.c @@ -1,6 +1,9 @@ /* * Copyright (c) 2014, Fuzhou Rockchip Electronics Co., Ltd * + * Copyright (c) 2015, Fuzhou Rockchip Electronics Co., Ltd + * Caesar Wang <[email protected]> + * * This program is free software; you can redistribute it and/or modify it * under the terms and conditions of the GNU General Public License, * version 2, as published by the Free Software Foundation. @@ -75,8 +78,12 @@ struct rockchip_tsadc_chip { /* Per-sensor methods */ int (*get_temp)(int chn, void __iomem *reg, int *temp); - void (*set_tshut_temp)(int chn, void __iomem *reg, long temp); + void (*set_tshut_value)(int chn, void __iomem *reg, u32 value); void (*set_tshut_mode)(int chn, void __iomem *reg, enum tshut_mode m); + + /* Per-table methods */ + const struct tsadc_table *table; + int table_num; }; struct rockchip_thermal_sensor { @@ -102,7 +109,7 @@ struct rockchip_thermal_data { enum tshut_polarity tshut_polarity; }; -/* TSADC V2 Sensor info define: */ +/* TSADC Sensor info define: */ #define TSADCV2_AUTO_CON 0x04 #define TSADCV2_INT_EN 0x08 #define TSADCV2_INT_PD 0x0c @@ -124,6 +131,8 @@ struct rockchip_thermal_data { #define TSADCV2_INT_PD_CLEAR_MASK ~BIT(8) #define TSADCV2_DATA_MASK 0xfff +#define TSADCV3_DATA_MASK 0x3ff + #define TSADCV2_HIGHT_INT_DEBOUNCE_COUNT 4 #define TSADCV2_HIGHT_TSHUT_DEBOUNCE_COUNT 4 #define TSADCV2_AUTO_PERIOD_TIME 250 /* msec */ @@ -172,21 +181,62 @@ static const struct tsadc_table v2_code_table[] = { {3421, 125000}, }; -static u32 rk_tsadcv2_temp_to_code(long temp) +static const struct tsadc_table v3_code_table[] = { + {0, -40000}, + {106, -40000}, + {108, -35000}, + {110, -30000}, + {112, -25000}, + {114, -20000}, + {116, -15000}, + {118, -10000}, + {120, -5000}, + {122, 0}, + {124, 5000}, + {126, 10000}, + {128, 15000}, + {130, 20000}, + {132, 25000}, + {134, 30000}, + {136, 35000}, + {138, 40000}, + {140, 45000}, + {142, 50000}, + {144, 55000}, + {146, 60000}, + {148, 65000}, + {150, 70000}, + {152, 75000}, + {154, 80000}, + {156, 85000}, + {158, 90000}, + {160, 95000}, + {162, 100000}, + {163, 105000}, + {165, 110000}, + {167, 115000}, + {169, 120000}, + {171, 125000}, + {TSADCV3_DATA_MASK, 125000}, +}; + +static u32 rk_tsadcv2_temp_to_code(const struct rockchip_tsadc_chip *chip, + long temp) { + const struct tsadc_table *table = chip->table; int high, low, mid; low = 0; - high = ARRAY_SIZE(v2_code_table) - 1; + high = chip->table_num - 1; mid = (high + low) / 2; - if (temp < v2_code_table[low].temp || temp > v2_code_table[high].temp) + if (temp < table[low].temp || temp > table[high].temp) return 0; while (low <= high) { - if (temp == v2_code_table[mid].temp) - return v2_code_table[mid].code; - else if (temp < v2_code_table[mid].temp) + if (temp == table[mid].temp) + return table[mid].code; + else if (temp < table[mid].temp) high = mid - 1; else low = mid + 1; @@ -235,16 +285,59 @@ static int rk_tsadcv2_code_to_temp(u32 code, int *temp) return 0; } +static int rk_tsadcv3_code_to_temp(u32 code, int *temp) +{ + unsigned int low = 1; + unsigned int high = ARRAY_SIZE(v3_code_table) - 1; + unsigned int mid = (low + high) / 2; + unsigned int num; + unsigned long denom; + + BUILD_BUG_ON(ARRAY_SIZE(v3_code_table) < 2); + + code &= TSADCV3_DATA_MASK; + if (code < v3_code_table[low].code) + return -EAGAIN; /* Incorrect reading */ + + while (low <= high) { + if (code >= v3_code_table[mid - 1].code && + code < v3_code_table[mid].code) + break; + else if (code > v3_code_table[mid].code) + low = mid + 1; + else + high = mid - 1; + mid = (low + high) / 2; + } + + /* + * The 5C granularity provided by the table is too much. Let's + * assume that the relationship between sensor readings and + * temperature between 2 table entries is linear and interpolate + * to produce less granular result. + */ + num = v3_code_table[mid].temp - v3_code_table[mid - 1].temp; + num *= code - v3_code_table[mid - 1].code; + denom = v3_code_table[mid].code - v3_code_table[mid - 1].code; + *temp = v3_code_table[mid - 1].temp + (num / denom); + + return 0; +} + /** - * rk_tsadcv2_initialize - initialize TASDC Controller - * (1) Set TSADCV2_AUTO_PERIOD, configure the interleave between - * every two accessing of TSADC in normal operation. - * (2) Set TSADCV2_AUTO_PERIOD_HT, configure the interleave between - * every two accessing of TSADC after the temperature is higher - * than COM_SHUT or COM_INT. - * (3) Set TSADCV2_HIGH_INT_DEBOUNCE and TSADC_HIGHT_TSHUT_DEBOUNCE, - * if the temperature is higher than COMP_INT or COMP_SHUT for - * "debounce" times, TSADC controller will generate interrupt or TSHUT. + * rk_tsadcv2_initialize - initialize TASDC Controller. + * + * (1) Set TSADC_V2_AUTO_PERIOD: + * Configure the interleave between every two accessing of + * TSADC in normal operation. + * + * (2) Set TSADCV2_AUTO_PERIOD_HT: + * Configure the interleave between every two accessing of + * TSADC after the temperature is higher than COM_SHUT or COM_INT. + * + * (3) Set TSADCV2_HIGH_INT_DEBOUNCE and TSADC_HIGHT_TSHUT_DEBOUNCE: + * If the temperature is higher than COMP_INT or COMP_SHUT for + * "debounce" times, TSADC controller will generate interrupt or TSHUT. */ static void rk_tsadcv2_initialize(void __iomem *regs, enum tshut_polarity tshut_polarity) @@ -286,6 +379,15 @@ static void rk_tsadcv2_control(void __iomem *regs, bool enable) writel_relaxed(val, regs + TSADCV2_AUTO_CON); } +static int rk_tsadcv3_get_temp(int chn, void __iomem *regs, int *temp) +{ + u32 val; + + val = readl_relaxed(regs + TSADCV2_DATA(chn)); + + return rk_tsadcv3_code_to_temp(val, temp); +} + static int rk_tsadcv2_get_temp(int chn, void __iomem *regs, int *temp) { u32 val; @@ -295,12 +397,11 @@ static int rk_tsadcv2_get_temp(int chn, void __iomem *regs, int *temp) return rk_tsadcv2_code_to_temp(val, temp); } -static void rk_tsadcv2_tshut_temp(int chn, void __iomem *regs, long temp) +static void rk_tsadcv2_tshut_value(int chn, void __iomem *regs, u32 value) { - u32 tshut_value, val; + u32 val; - tshut_value = rk_tsadcv2_temp_to_code(temp); - writel_relaxed(tshut_value, regs + TSADCV2_COMP_SHUT(chn)); + writel_relaxed(value, regs + TSADCV2_COMP_SHUT(chn)); /* TSHUT will be valid */ val = readl_relaxed(regs + TSADCV2_AUTO_CON); @@ -337,8 +438,31 @@ static const struct rockchip_tsadc_chip rk3288_tsadc_data = { .irq_ack = rk_tsadcv2_irq_ack, .control = rk_tsadcv2_control, .get_temp = rk_tsadcv2_get_temp, - .set_tshut_temp = rk_tsadcv2_tshut_temp, + .set_tshut_value = rk_tsadcv2_tshut_value, + .set_tshut_mode = rk_tsadcv2_tshut_mode, + + .table = v2_code_table, + .table_num = ARRAY_SIZE(v2_code_table), +}; + +static const struct rockchip_tsadc_chip rk3368_tsadc_data = { + .chn_id[SENSOR_CPU] = 0, /* cpu sensor is channel 0 */ + .chn_id[SENSOR_GPU] = 1, /* gpu sensor is channel 1 */ + .chn_num = 2, /* two channels for tsadc */ + + .tshut_mode = TSHUT_MODE_GPIO, /* default TSHUT via GPIO give PMIC */ + .tshut_polarity = TSHUT_LOW_ACTIVE, /* default TSHUT LOW ACTIVE */ + .tshut_temp = 95000, + + .initialize = rk_tsadcv2_initialize, + .irq_ack = rk_tsadcv2_irq_ack, + .control = rk_tsadcv2_control, + .get_temp = rk_tsadcv3_get_temp, + .set_tshut_value = rk_tsadcv2_tshut_value, .set_tshut_mode = rk_tsadcv2_tshut_mode, + + .table = v3_code_table, + .table_num = ARRAY_SIZE(v3_code_table), }; static const struct of_device_id of_rockchip_thermal_match[] = { @@ -346,6 +470,10 @@ static const struct of_device_id of_rockchip_thermal_match[] = { .compatible = "rockchip,rk3288-tsadc", .data = (void *)&rk3288_tsadc_data, }, + { + .compatible = "rockchip,rk3368-tsadc", + .data = (void *)&rk3368_tsadc_data, + }, { /* end */ }, }; MODULE_DEVICE_TABLE(of, of_rockchip_thermal_match); @@ -458,8 +586,10 @@ rockchip_thermal_register_sensor(struct platform_device *pdev, const struct rockchip_tsadc_chip *tsadc = thermal->chip; int error; + u32 tshut_value = rk_tsadcv2_temp_to_code(tsadc, thermal->tshut_temp); + tsadc->set_tshut_mode(id, thermal->regs, thermal->tshut_mode); - tsadc->set_tshut_temp(id, thermal->regs, thermal->tshut_temp); + tsadc->set_tshut_value(id, thermal->regs, tshut_value); sensor->thermal = thermal; sensor->id = id; @@ -660,6 +790,9 @@ static int __maybe_unused rockchip_thermal_resume(struct device *dev) int i; int error; + u32 tshut_value = rk_tsadcv2_temp_to_code(thermal->chip, + thermal->tshut_temp); + error = clk_enable(thermal->clk); if (error) return error; @@ -677,8 +810,8 @@ static int __maybe_unused rockchip_thermal_resume(struct device *dev) thermal->chip->set_tshut_mode(id, thermal->regs, thermal->tshut_mode); - thermal->chip->set_tshut_temp(id, thermal->regs, - thermal->tshut_temp); + thermal->chip->set_tshut_value(id, thermal->regs, + tshut_value); } thermal->chip->control(thermal->regs, true); -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
