Merge branch 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/evalenti/linux-soc-thermal into thermal-soc

drivers/thermal/rockchip_thermal.c

@@ -118,12 +118,12 @@ struct rockchip_tsadc_chip {
 	void (*control)(void __iomem *reg, bool on);
 
 	/* Per-sensor methods */
-	int (*get_temp)(struct chip_tsadc_table table,
+	int (*get_temp)(const struct chip_tsadc_table *table,
 			int chn, void __iomem *reg, int *temp);
-	void (*set_alarm_temp)(struct chip_tsadc_table table,
-			       int chn, void __iomem *reg, int temp);
-	void (*set_tshut_temp)(struct chip_tsadc_table table,
-			       int chn, void __iomem *reg, int temp);
+	int (*set_alarm_temp)(const struct chip_tsadc_table *table,
+			      int chn, void __iomem *reg, int temp);
+	int (*set_tshut_temp)(const struct chip_tsadc_table *table,
+			      int chn, void __iomem *reg, int temp);
 	void (*set_tshut_mode)(int chn, void __iomem *reg, enum tshut_mode m);
 
 	/* Per-table methods */
@@ -317,6 +317,7 @@ static const struct tsadc_table rk3288_code_table[] = {
 	{3452, 115000},
 	{3437, 120000},
 	{3421, 125000},
+	{0, 125000},
 };
 
 static const struct tsadc_table rk3368_code_table[] = {
@@ -397,59 +398,80 @@ static const struct tsadc_table rk3399_code_table[] = {
 	{TSADCV3_DATA_MASK, 125000},
 };
 
-static u32 rk_tsadcv2_temp_to_code(struct chip_tsadc_table table,
+static u32 rk_tsadcv2_temp_to_code(const struct chip_tsadc_table *table,
 				   int temp)
 {
 	int high, low, mid;
-	u32 error = 0;
+	unsigned long num;
+	unsigned int denom;
+	u32 error = table->data_mask;
 
 	low = 0;
-	high = table.length - 1;
+	high = (table->length - 1) - 1; /* ignore the last check for table */
 	mid = (high + low) / 2;
 
 	/* Return mask code data when the temp is over table range */
-	if (temp < table.id[low].temp || temp > table.id[high].temp) {
-		error = table.data_mask;
+	if (temp < table->id[low].temp || temp > table->id[high].temp)
 		goto exit;
-	}
 
 	while (low <= high) {
-		if (temp == table.id[mid].temp)
-			return table.id[mid].code;
-		else if (temp < table.id[mid].temp)
+		if (temp == table->id[mid].temp)
+			return table->id[mid].code;
+		else if (temp < table->id[mid].temp)
 			high = mid - 1;
 		else
 			low = mid + 1;
 		mid = (low + high) / 2;
 	}
 
+	/*
+	 * The conversion code granularity provided by the table. Let's
+	 * assume that the relationship between temperature and
+	 * analog value between 2 table entries is linear and interpolate
+	 * to produce less granular result.
+	 */
+	num = abs(table->id[mid + 1].code - table->id[mid].code);
+	num *= temp - table->id[mid].temp;
+	denom = table->id[mid + 1].temp - table->id[mid].temp;
+
+	switch (table->mode) {
+	case ADC_DECREMENT:
+		return table->id[mid].code - (num / denom);
+	case ADC_INCREMENT:
+		return table->id[mid].code + (num / denom);
+	default:
+		pr_err("%s: unknown table mode: %d\n", __func__, table->mode);
+		return error;
+	}
+
 exit:
-	pr_err("Invalid the conversion, error=%d\n", error);
+	pr_err("%s: invalid temperature, temp=%d error=%d\n",
+	       __func__, temp, error);
 	return error;
 }
 
-static int rk_tsadcv2_code_to_temp(struct chip_tsadc_table table, u32 code,
-				   int *temp)
+static int rk_tsadcv2_code_to_temp(const struct chip_tsadc_table *table,
+				   u32 code, int *temp)
 {
 	unsigned int low = 1;
-	unsigned int high = table.length - 1;
+	unsigned int high = table->length - 1;
 	unsigned int mid = (low + high) / 2;
 	unsigned int num;
 	unsigned long denom;
 
-	WARN_ON(table.length < 2);
+	WARN_ON(table->length < 2);
 
-	switch (table.mode) {
+	switch (table->mode) {
 	case ADC_DECREMENT:
-		code &= table.data_mask;
-		if (code < table.id[high].code)
+		code &= table->data_mask;
+		if (code <= table->id[high].code)
 			return -EAGAIN;		/* Incorrect reading */
 
 		while (low <= high) {
-			if (code >= table.id[mid].code &&
-			    code < table.id[mid - 1].code)
+			if (code >= table->id[mid].code &&
+			    code < table->id[mid - 1].code)
 				break;
-			else if (code < table.id[mid].code)
+			else if (code < table->id[mid].code)
 				low = mid + 1;
 			else
 				high = mid - 1;
@@ -458,15 +480,15 @@ static int rk_tsadcv2_code_to_temp(struct chip_tsadc_table table, u32 code,
 		}
 		break;
 	case ADC_INCREMENT:
-		code &= table.data_mask;
-		if (code < table.id[low].code)
+		code &= table->data_mask;
+		if (code < table->id[low].code)
 			return -EAGAIN;		/* Incorrect reading */
 
 		while (low <= high) {
-			if (code <= table.id[mid].code &&
-			    code > table.id[mid - 1].code)
+			if (code <= table->id[mid].code &&
+			    code > table->id[mid - 1].code)
 				break;
-			else if (code > table.id[mid].code)
+			else if (code > table->id[mid].code)
 				low = mid + 1;
 			else
 				high = mid - 1;
@@ -475,7 +497,8 @@ static int rk_tsadcv2_code_to_temp(struct chip_tsadc_table table, u32 code,
 		}
 		break;
 	default:
-		pr_err("Invalid the conversion table\n");
+		pr_err("%s: unknown table mode: %d\n", __func__, table->mode);
+		return -EINVAL;
 	}
 
 	/*
@@ -484,10 +507,10 @@ static int rk_tsadcv2_code_to_temp(struct chip_tsadc_table table, u32 code,
 	 * temperature between 2 table entries is linear and interpolate
 	 * to produce less granular result.
 	 */
-	num = table.id[mid].temp - table.id[mid - 1].temp;
-	num *= abs(table.id[mid - 1].code - code);
-	denom = abs(table.id[mid - 1].code - table.id[mid].code);
-	*temp = table.id[mid - 1].temp + (num / denom);
+	num = table->id[mid].temp - table->id[mid - 1].temp;
+	num *= abs(table->id[mid - 1].code - code);
+	denom = abs(table->id[mid - 1].code - table->id[mid].code);
+	*temp = table->id[mid - 1].temp + (num / denom);
 
 	return 0;
 }
@@ -638,7 +661,7 @@ static void rk_tsadcv3_control(void __iomem *regs, bool enable)
 	writel_relaxed(val, regs + TSADCV2_AUTO_CON);
 }
 
-static int rk_tsadcv2_get_temp(struct chip_tsadc_table table,
+static int rk_tsadcv2_get_temp(const struct chip_tsadc_table *table,
 			       int chn, void __iomem *regs, int *temp)
 {
 	u32 val;
@@ -648,39 +671,57 @@ static int rk_tsadcv2_get_temp(struct chip_tsadc_table table,
 	return rk_tsadcv2_code_to_temp(table, val, temp);
 }
 
-static void rk_tsadcv2_alarm_temp(struct chip_tsadc_table table,
-				  int chn, void __iomem *regs, int temp)
+static int rk_tsadcv2_alarm_temp(const struct chip_tsadc_table *table,
+				 int chn, void __iomem *regs, int temp)
 {
-	u32 alarm_value, int_en;
+	u32 alarm_value;
+	u32 int_en, int_clr;
+
+	/*
+	 * In some cases, some sensors didn't need the trip points, the
+	 * set_trips will pass {-INT_MAX, INT_MAX} to trigger tsadc alarm
+	 * in the end, ignore this case and disable the high temperature
+	 * interrupt.
+	 */
+	if (temp == INT_MAX) {
+		int_clr = readl_relaxed(regs + TSADCV2_INT_EN);
+		int_clr &= ~TSADCV2_INT_SRC_EN(chn);
+		writel_relaxed(int_clr, regs + TSADCV2_INT_EN);
+		return 0;
+	}
 
 	/* Make sure the value is valid */
 	alarm_value = rk_tsadcv2_temp_to_code(table, temp);
-	if (alarm_value == table.data_mask)
-		return;
+	if (alarm_value == table->data_mask)
+		return -ERANGE;
 
-	writel_relaxed(alarm_value & table.data_mask,
+	writel_relaxed(alarm_value & table->data_mask,
 		       regs + TSADCV2_COMP_INT(chn));
 
 	int_en = readl_relaxed(regs + TSADCV2_INT_EN);
 	int_en |= TSADCV2_INT_SRC_EN(chn);
 	writel_relaxed(int_en, regs + TSADCV2_INT_EN);
+
+	return 0;
 }
 
-static void rk_tsadcv2_tshut_temp(struct chip_tsadc_table table,
-				  int chn, void __iomem *regs, int temp)
+static int rk_tsadcv2_tshut_temp(const struct chip_tsadc_table *table,
+				 int chn, void __iomem *regs, int temp)
 {
 	u32 tshut_value, val;
 
 	/* Make sure the value is valid */
 	tshut_value = rk_tsadcv2_temp_to_code(table, temp);
-	if (tshut_value == table.data_mask)
-		return;
+	if (tshut_value == table->data_mask)
+		return -ERANGE;
 
 	writel_relaxed(tshut_value, regs + TSADCV2_COMP_SHUT(chn));
 
 	/* TSHUT will be valid */
 	val = readl_relaxed(regs + TSADCV2_AUTO_CON);
 	writel_relaxed(val | TSADCV2_AUTO_SRC_EN(chn), regs + TSADCV2_AUTO_CON);
+
+	return 0;
 }
 
 static void rk_tsadcv2_tshut_mode(int chn, void __iomem *regs,
@@ -883,10 +924,8 @@ static int rockchip_thermal_set_trips(void *_sensor, int low, int high)
 	dev_dbg(&thermal->pdev->dev, "%s: sensor %d: low: %d, high %d\n",
 		__func__, sensor->id, low, high);
 
-	tsadc->set_alarm_temp(tsadc->table,
-			      sensor->id, thermal->regs, high);
-
-	return 0;
+	return tsadc->set_alarm_temp(&tsadc->table,
+				     sensor->id, thermal->regs, high);
 }
 
 static int rockchip_thermal_get_temp(void *_sensor, int *out_temp)
@@ -896,7 +935,7 @@ static int rockchip_thermal_get_temp(void *_sensor, int *out_temp)
 	const struct rockchip_tsadc_chip *tsadc = sensor->thermal->chip;
 	int retval;
 
-	retval = tsadc->get_temp(tsadc->table,
+	retval = tsadc->get_temp(&tsadc->table,
 				 sensor->id, thermal->regs, out_temp);
 	dev_dbg(&thermal->pdev->dev, "sensor %d - temp: %d, retval: %d\n",
 		sensor->id, *out_temp, retval);
@@ -982,8 +1021,12 @@ rockchip_thermal_register_sensor(struct platform_device *pdev,
 	int error;
 
 	tsadc->set_tshut_mode(id, thermal->regs, thermal->tshut_mode);
-	tsadc->set_tshut_temp(tsadc->table, id, thermal->regs,
+
+	error = tsadc->set_tshut_temp(&tsadc->table, id, thermal->regs,
 			      thermal->tshut_temp);
+	if (error)
+		dev_err(&pdev->dev, "%s: invalid tshut=%d, error=%d\n",
+			__func__, thermal->tshut_temp, error);
 
 	sensor->thermal = thermal;
 	sensor->id = id;
@@ -1196,9 +1239,13 @@ 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(thermal->chip->table,
+
+		error = thermal->chip->set_tshut_temp(&thermal->chip->table,
 					      id, thermal->regs,
 					      thermal->tshut_temp);
+		if (error)
+			dev_err(&pdev->dev, "%s: invalid tshut=%d, error=%d\n",
+				__func__, thermal->tshut_temp, error);
 	}
 
 	thermal->chip->control(thermal->regs, true);