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path: root/drivers/thermal/broadcom/brcmstb_thermal.c
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Diffstat (limited to 'drivers/thermal/broadcom/brcmstb_thermal.c')
-rw-r--r--drivers/thermal/broadcom/brcmstb_thermal.c96
1 files changed, 58 insertions, 38 deletions
diff --git a/drivers/thermal/broadcom/brcmstb_thermal.c b/drivers/thermal/broadcom/brcmstb_thermal.c
index 5825ac581f56..8df5edef1ded 100644
--- a/drivers/thermal/broadcom/brcmstb_thermal.c
+++ b/drivers/thermal/broadcom/brcmstb_thermal.c
@@ -49,7 +49,7 @@
#define AVS_TMON_TP_TEST_ENABLE 0x20
/* Default coefficients */
-#define AVS_TMON_TEMP_SLOPE -487
+#define AVS_TMON_TEMP_SLOPE 487
#define AVS_TMON_TEMP_OFFSET 410040
/* HW related temperature constants */
@@ -102,29 +102,28 @@ static struct avs_tmon_trip avs_tmon_trips[] = {
},
};
+struct brcmstb_thermal_params {
+ unsigned int offset;
+ unsigned int mult;
+ const struct thermal_zone_of_device_ops *of_ops;
+};
+
struct brcmstb_thermal_priv {
void __iomem *tmon_base;
struct device *dev;
struct thermal_zone_device *thermal;
+ /* Process specific thermal parameters used for calculations */
+ const struct brcmstb_thermal_params *temp_params;
};
-static void avs_tmon_get_coeffs(struct thermal_zone_device *tz, int *slope,
- int *offset)
-{
- *slope = thermal_zone_get_slope(tz);
- *offset = thermal_zone_get_offset(tz);
-}
-
/* Convert a HW code to a temperature reading (millidegree celsius) */
-static inline int avs_tmon_code_to_temp(struct thermal_zone_device *tz,
+static inline int avs_tmon_code_to_temp(struct brcmstb_thermal_priv *priv,
u32 code)
{
- const int val = code & AVS_TMON_TEMP_MASK;
- int slope, offset;
+ int offset = priv->temp_params->offset;
+ int mult = priv->temp_params->mult;
- avs_tmon_get_coeffs(tz, &slope, &offset);
-
- return slope * val + offset;
+ return (offset - (int)((code & AVS_TMON_TEMP_MASK) * mult));
}
/*
@@ -133,23 +132,22 @@ static inline int avs_tmon_code_to_temp(struct thermal_zone_device *tz,
* @temp: temperature to convert
* @low: if true, round toward the low side
*/
-static inline u32 avs_tmon_temp_to_code(struct thermal_zone_device *tz,
+static inline u32 avs_tmon_temp_to_code(struct brcmstb_thermal_priv *priv,
int temp, bool low)
{
- int slope, offset;
+ int offset = priv->temp_params->offset;
+ int mult = priv->temp_params->mult;
if (temp < AVS_TMON_TEMP_MIN)
- return AVS_TMON_TEMP_MAX; /* Maximum code value */
-
- avs_tmon_get_coeffs(tz, &slope, &offset);
+ return AVS_TMON_TEMP_MAX; /* Maximum code value */
if (temp >= offset)
return 0; /* Minimum code value */
if (low)
- return (u32)(DIV_ROUND_UP(offset - temp, abs(slope)));
+ return (u32)(DIV_ROUND_UP(offset - temp, mult));
else
- return (u32)((offset - temp) / abs(slope));
+ return (u32)((offset - temp) / mult);
}
static int brcmstb_get_temp(void *data, int *temp)
@@ -167,7 +165,7 @@ static int brcmstb_get_temp(void *data, int *temp)
val = (val & AVS_TMON_STATUS_data_msk) >> AVS_TMON_STATUS_data_shift;
- t = avs_tmon_code_to_temp(priv->thermal, val);
+ t = avs_tmon_code_to_temp(priv, val);
if (t < 0)
*temp = 0;
else
@@ -201,7 +199,7 @@ static int avs_tmon_get_trip_temp(struct brcmstb_thermal_priv *priv,
val &= trip->reg_msk;
val >>= trip->reg_shift;
- return avs_tmon_code_to_temp(priv->thermal, val);
+ return avs_tmon_code_to_temp(priv, val);
}
static void avs_tmon_set_trip_temp(struct brcmstb_thermal_priv *priv,
@@ -214,7 +212,7 @@ static void avs_tmon_set_trip_temp(struct brcmstb_thermal_priv *priv,
dev_dbg(priv->dev, "set temp %d to %d\n", type, temp);
/* round toward low temp for the low interrupt */
- val = avs_tmon_temp_to_code(priv->thermal, temp,
+ val = avs_tmon_temp_to_code(priv, temp,
type == TMON_TRIP_TYPE_LOW);
val <<= trip->reg_shift;
@@ -231,7 +229,7 @@ static int avs_tmon_get_intr_temp(struct brcmstb_thermal_priv *priv)
u32 val;
val = __raw_readl(priv->tmon_base + AVS_TMON_TEMP_INT_CODE);
- return avs_tmon_code_to_temp(priv->thermal, val);
+ return avs_tmon_code_to_temp(priv, val);
}
static irqreturn_t brcmstb_tmon_irq_thread(int irq, void *data)
@@ -290,19 +288,37 @@ static int brcmstb_set_trips(void *data, int low, int high)
return 0;
}
-static const struct thermal_zone_of_device_ops of_ops = {
+static const struct thermal_zone_of_device_ops brcmstb_16nm_of_ops = {
+ .get_temp = brcmstb_get_temp,
+};
+
+static const struct brcmstb_thermal_params brcmstb_16nm_params = {
+ .offset = 457829,
+ .mult = 557,
+ .of_ops = &brcmstb_16nm_of_ops,
+};
+
+static const struct thermal_zone_of_device_ops brcmstb_28nm_of_ops = {
.get_temp = brcmstb_get_temp,
.set_trips = brcmstb_set_trips,
};
+static const struct brcmstb_thermal_params brcmstb_28nm_params = {
+ .offset = 410040,
+ .mult = 487,
+ .of_ops = &brcmstb_28nm_of_ops,
+};
+
static const struct of_device_id brcmstb_thermal_id_table[] = {
- { .compatible = "brcm,avs-tmon" },
+ { .compatible = "brcm,avs-tmon-bcm7216", .data = &brcmstb_16nm_params },
+ { .compatible = "brcm,avs-tmon", .data = &brcmstb_28nm_params },
{},
};
MODULE_DEVICE_TABLE(of, brcmstb_thermal_id_table);
static int brcmstb_thermal_probe(struct platform_device *pdev)
{
+ const struct thermal_zone_of_device_ops *of_ops;
struct thermal_zone_device *thermal;
struct brcmstb_thermal_priv *priv;
struct resource *res;
@@ -312,6 +328,10 @@ static int brcmstb_thermal_probe(struct platform_device *pdev)
if (!priv)
return -ENOMEM;
+ priv->temp_params = of_device_get_match_data(&pdev->dev);
+ if (!priv->temp_params)
+ return -EINVAL;
+
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
priv->tmon_base = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(priv->tmon_base))
@@ -319,9 +339,10 @@ static int brcmstb_thermal_probe(struct platform_device *pdev)
priv->dev = &pdev->dev;
platform_set_drvdata(pdev, priv);
+ of_ops = priv->temp_params->of_ops;
thermal = devm_thermal_zone_of_sensor_register(&pdev->dev, 0, priv,
- &of_ops);
+ of_ops);
if (IS_ERR(thermal)) {
ret = PTR_ERR(thermal);
dev_err(&pdev->dev, "could not register sensor: %d\n", ret);
@@ -331,16 +352,15 @@ static int brcmstb_thermal_probe(struct platform_device *pdev)
priv->thermal = thermal;
irq = platform_get_irq(pdev, 0);
- if (irq < 0) {
- dev_err(&pdev->dev, "could not get IRQ\n");
- return irq;
- }
- ret = devm_request_threaded_irq(&pdev->dev, irq, NULL,
- brcmstb_tmon_irq_thread, IRQF_ONESHOT,
- DRV_NAME, priv);
- if (ret < 0) {
- dev_err(&pdev->dev, "could not request IRQ: %d\n", ret);
- return ret;
+ if (irq >= 0) {
+ ret = devm_request_threaded_irq(&pdev->dev, irq, NULL,
+ brcmstb_tmon_irq_thread,
+ IRQF_ONESHOT,
+ DRV_NAME, priv);
+ if (ret < 0) {
+ dev_err(&pdev->dev, "could not request IRQ: %d\n", ret);
+ return ret;
+ }
}
dev_info(&pdev->dev, "registered AVS TMON of-sensor driver\n");
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.