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path: root/drivers/thermal/armada_thermal.c
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Diffstat (limited to 'drivers/thermal/armada_thermal.c')
-rw-r--r--drivers/thermal/armada_thermal.c534
1 files changed, 408 insertions, 126 deletions
diff --git a/drivers/thermal/armada_thermal.c b/drivers/thermal/armada_thermal.c
index 4c275ec10ac5..2c2f6d93034e 100644
--- a/drivers/thermal/armada_thermal.c
+++ b/drivers/thermal/armada_thermal.c
@@ -24,6 +24,8 @@
#include <linux/of_device.h>
#include <linux/thermal.h>
#include <linux/iopoll.h>
+#include <linux/mfd/syscon.h>
+#include <linux/regmap.h>
/* Thermal Manager Control and Status Register */
#define PMU_TDC0_SW_RST_MASK (0x1 << 1)
@@ -39,24 +41,24 @@
#define A375_READOUT_INVERT BIT(15)
#define A375_HW_RESETn BIT(8)
-/* Legacy bindings */
-#define LEGACY_CONTROL_MEM_LEN 0x4
-
-/* Current bindings with the 2 control registers under the same memory area */
-#define LEGACY_CONTROL1_OFFSET 0x0
-#define CONTROL0_OFFSET 0x0
-#define CONTROL1_OFFSET 0x4
-
/* Errata fields */
#define CONTROL0_TSEN_TC_TRIM_MASK 0x7
#define CONTROL0_TSEN_TC_TRIM_VAL 0x3
-/* TSEN refers to the temperature sensors within the AP */
#define CONTROL0_TSEN_START BIT(0)
#define CONTROL0_TSEN_RESET BIT(1)
#define CONTROL0_TSEN_ENABLE BIT(2)
-
-/* EXT_TSEN refers to the external temperature sensors, out of the AP */
+#define CONTROL0_TSEN_AVG_BYPASS BIT(6)
+#define CONTROL0_TSEN_CHAN_SHIFT 13
+#define CONTROL0_TSEN_CHAN_MASK 0xF
+#define CONTROL0_TSEN_OSR_SHIFT 24
+#define CONTROL0_TSEN_OSR_MAX 0x3
+#define CONTROL0_TSEN_MODE_SHIFT 30
+#define CONTROL0_TSEN_MODE_EXTERNAL 0x2
+#define CONTROL0_TSEN_MODE_MASK 0x3
+
+#define CONTROL1_TSEN_AVG_SHIFT 0
+#define CONTROL1_TSEN_AVG_MASK 0x7
#define CONTROL1_EXT_TSEN_SW_RESET BIT(7)
#define CONTROL1_EXT_TSEN_HW_RESETn BIT(8)
@@ -67,19 +69,19 @@ struct armada_thermal_data;
/* Marvell EBU Thermal Sensor Dev Structure */
struct armada_thermal_priv {
- void __iomem *status;
- void __iomem *control0;
- void __iomem *control1;
+ struct device *dev;
+ struct regmap *syscon;
+ char zone_name[THERMAL_NAME_LENGTH];
+ /* serialize temperature reads/updates */
+ struct mutex update_lock;
struct armada_thermal_data *data;
+ int current_channel;
};
struct armada_thermal_data {
- /* Initialize the sensor */
- void (*init_sensor)(struct platform_device *pdev,
- struct armada_thermal_priv *);
-
- /* Test for a valid sensor value (optional) */
- bool (*is_valid)(struct armada_thermal_priv *);
+ /* Initialize the thermal IC */
+ void (*init)(struct platform_device *pdev,
+ struct armada_thermal_priv *priv);
/* Formula coeficients: temp = (b - m * reg) / div */
s64 coef_b;
@@ -92,141 +94,242 @@ struct armada_thermal_data {
unsigned int temp_shift;
unsigned int temp_mask;
u32 is_valid_bit;
- bool needs_control0;
+
+ /* Syscon access */
+ unsigned int syscon_control0_off;
+ unsigned int syscon_control1_off;
+ unsigned int syscon_status_off;
+
+ /* One sensor is in the thermal IC, the others are in the CPUs if any */
+ unsigned int cpu_nr;
};
-static void armadaxp_init_sensor(struct platform_device *pdev,
- struct armada_thermal_priv *priv)
+struct armada_drvdata {
+ enum drvtype {
+ LEGACY,
+ SYSCON
+ } type;
+ union {
+ struct armada_thermal_priv *priv;
+ struct thermal_zone_device *tz;
+ } data;
+};
+
+/*
+ * struct armada_thermal_sensor - hold the information of one thermal sensor
+ * @thermal: pointer to the local private structure
+ * @tzd: pointer to the thermal zone device
+ * @id: identifier of the thermal sensor
+ */
+struct armada_thermal_sensor {
+ struct armada_thermal_priv *priv;
+ int id;
+};
+
+static void armadaxp_init(struct platform_device *pdev,
+ struct armada_thermal_priv *priv)
{
+ struct armada_thermal_data *data = priv->data;
u32 reg;
- reg = readl_relaxed(priv->control1);
+ regmap_read(priv->syscon, data->syscon_control1_off, &reg);
reg |= PMU_TDC0_OTF_CAL_MASK;
- writel(reg, priv->control1);
/* Reference calibration value */
reg &= ~PMU_TDC0_REF_CAL_CNT_MASK;
reg |= (0xf1 << PMU_TDC0_REF_CAL_CNT_OFFS);
- writel(reg, priv->control1);
/* Reset the sensor */
- reg = readl_relaxed(priv->control1);
- writel((reg | PMU_TDC0_SW_RST_MASK), priv->control1);
+ reg |= PMU_TDC0_SW_RST_MASK;
- writel(reg, priv->control1);
+ regmap_write(priv->syscon, data->syscon_control1_off, reg);
/* Enable the sensor */
- reg = readl_relaxed(priv->status);
+ regmap_read(priv->syscon, data->syscon_status_off, &reg);
reg &= ~PMU_TM_DISABLE_MASK;
- writel(reg, priv->status);
+ regmap_write(priv->syscon, data->syscon_status_off, reg);
}
-static void armada370_init_sensor(struct platform_device *pdev,
- struct armada_thermal_priv *priv)
+static void armada370_init(struct platform_device *pdev,
+ struct armada_thermal_priv *priv)
{
+ struct armada_thermal_data *data = priv->data;
u32 reg;
- reg = readl_relaxed(priv->control1);
+ regmap_read(priv->syscon, data->syscon_control1_off, &reg);
reg |= PMU_TDC0_OTF_CAL_MASK;
- writel(reg, priv->control1);
/* Reference calibration value */
reg &= ~PMU_TDC0_REF_CAL_CNT_MASK;
reg |= (0xf1 << PMU_TDC0_REF_CAL_CNT_OFFS);
- writel(reg, priv->control1);
+ /* Reset the sensor */
reg &= ~PMU_TDC0_START_CAL_MASK;
- writel(reg, priv->control1);
+
+ regmap_write(priv->syscon, data->syscon_control1_off, reg);
msleep(10);
}
-static void armada375_init_sensor(struct platform_device *pdev,
- struct armada_thermal_priv *priv)
+static void armada375_init(struct platform_device *pdev,
+ struct armada_thermal_priv *priv)
{
+ struct armada_thermal_data *data = priv->data;
u32 reg;
- reg = readl(priv->control1);
+ regmap_read(priv->syscon, data->syscon_control1_off, &reg);
reg &= ~(A375_UNIT_CONTROL_MASK << A375_UNIT_CONTROL_SHIFT);
reg &= ~A375_READOUT_INVERT;
reg &= ~A375_HW_RESETn;
+ regmap_write(priv->syscon, data->syscon_control1_off, reg);
- writel(reg, priv->control1);
msleep(20);
reg |= A375_HW_RESETn;
- writel(reg, priv->control1);
+ regmap_write(priv->syscon, data->syscon_control1_off, reg);
+
msleep(50);
}
-static void armada_wait_sensor_validity(struct armada_thermal_priv *priv)
+static int armada_wait_sensor_validity(struct armada_thermal_priv *priv)
{
u32 reg;
- readl_relaxed_poll_timeout(priv->status, reg,
- reg & priv->data->is_valid_bit,
- STATUS_POLL_PERIOD_US,
- STATUS_POLL_TIMEOUT_US);
+ return regmap_read_poll_timeout(priv->syscon,
+ priv->data->syscon_status_off, reg,
+ reg & priv->data->is_valid_bit,
+ STATUS_POLL_PERIOD_US,
+ STATUS_POLL_TIMEOUT_US);
}
-static void armada380_init_sensor(struct platform_device *pdev,
- struct armada_thermal_priv *priv)
+static void armada380_init(struct platform_device *pdev,
+ struct armada_thermal_priv *priv)
{
- u32 reg = readl_relaxed(priv->control1);
+ struct armada_thermal_data *data = priv->data;
+ u32 reg;
/* Disable the HW/SW reset */
+ regmap_read(priv->syscon, data->syscon_control1_off, &reg);
reg |= CONTROL1_EXT_TSEN_HW_RESETn;
reg &= ~CONTROL1_EXT_TSEN_SW_RESET;
- writel(reg, priv->control1);
+ regmap_write(priv->syscon, data->syscon_control1_off, reg);
/* Set Tsen Tc Trim to correct default value (errata #132698) */
- if (priv->control0) {
- reg = readl_relaxed(priv->control0);
- reg &= ~CONTROL0_TSEN_TC_TRIM_MASK;
- reg |= CONTROL0_TSEN_TC_TRIM_VAL;
- writel(reg, priv->control0);
- }
-
- /* Wait the sensors to be valid or the core will warn the user */
- armada_wait_sensor_validity(priv);
+ regmap_read(priv->syscon, data->syscon_control0_off, &reg);
+ reg &= ~CONTROL0_TSEN_TC_TRIM_MASK;
+ reg |= CONTROL0_TSEN_TC_TRIM_VAL;
+ regmap_write(priv->syscon, data->syscon_control0_off, reg);
}
-static void armada_ap806_init_sensor(struct platform_device *pdev,
- struct armada_thermal_priv *priv)
+static void armada_ap806_init(struct platform_device *pdev,
+ struct armada_thermal_priv *priv)
{
+ struct armada_thermal_data *data = priv->data;
u32 reg;
- reg = readl_relaxed(priv->control0);
+ regmap_read(priv->syscon, data->syscon_control0_off, &reg);
reg &= ~CONTROL0_TSEN_RESET;
reg |= CONTROL0_TSEN_START | CONTROL0_TSEN_ENABLE;
- writel(reg, priv->control0);
- /* Wait the sensors to be valid or the core will warn the user */
- armada_wait_sensor_validity(priv);
+ /* Sample every ~2ms */
+ reg |= CONTROL0_TSEN_OSR_MAX << CONTROL0_TSEN_OSR_SHIFT;
+
+ /* Enable average (2 samples by default) */
+ reg &= ~CONTROL0_TSEN_AVG_BYPASS;
+
+ regmap_write(priv->syscon, data->syscon_control0_off, reg);
+}
+
+static void armada_cp110_init(struct platform_device *pdev,
+ struct armada_thermal_priv *priv)
+{
+ struct armada_thermal_data *data = priv->data;
+ u32 reg;
+
+ armada380_init(pdev, priv);
+
+ /* Sample every ~2ms */
+ regmap_read(priv->syscon, data->syscon_control0_off, &reg);
+ reg |= CONTROL0_TSEN_OSR_MAX << CONTROL0_TSEN_OSR_SHIFT;
+ regmap_write(priv->syscon, data->syscon_control0_off, reg);
+
+ /* Average the output value over 2^1 = 2 samples */
+ regmap_read(priv->syscon, data->syscon_control1_off, &reg);
+ reg &= ~CONTROL1_TSEN_AVG_MASK << CONTROL1_TSEN_AVG_SHIFT;
+ reg |= 1 << CONTROL1_TSEN_AVG_SHIFT;
+ regmap_write(priv->syscon, data->syscon_control1_off, reg);
}
static bool armada_is_valid(struct armada_thermal_priv *priv)
{
- u32 reg = readl_relaxed(priv->status);
+ u32 reg;
+
+ if (!priv->data->is_valid_bit)
+ return true;
+
+ regmap_read(priv->syscon, priv->data->syscon_status_off, &reg);
return reg & priv->data->is_valid_bit;
}
-static int armada_get_temp(struct thermal_zone_device *thermal,
- int *temp)
+/* There is currently no board with more than one sensor per channel */
+static int armada_select_channel(struct armada_thermal_priv *priv, int channel)
{
- struct armada_thermal_priv *priv = thermal->devdata;
- u32 reg, div;
- s64 sample, b, m;
+ struct armada_thermal_data *data = priv->data;
+ u32 ctrl0;
+
+ if (channel < 0 || channel > priv->data->cpu_nr)
+ return -EINVAL;
+
+ if (priv->current_channel == channel)
+ return 0;
+
+ /* Stop the measurements */
+ regmap_read(priv->syscon, data->syscon_control0_off, &ctrl0);
+ ctrl0 &= ~CONTROL0_TSEN_START;
+ regmap_write(priv->syscon, data->syscon_control0_off, ctrl0);
+
+ /* Reset the mode, internal sensor will be automatically selected */
+ ctrl0 &= ~(CONTROL0_TSEN_MODE_MASK << CONTROL0_TSEN_MODE_SHIFT);
+
+ /* Other channels are external and should be selected accordingly */
+ if (channel) {
+ /* Change the mode to external */
+ ctrl0 |= CONTROL0_TSEN_MODE_EXTERNAL <<
+ CONTROL0_TSEN_MODE_SHIFT;
+ /* Select the sensor */
+ ctrl0 &= ~(CONTROL0_TSEN_CHAN_MASK << CONTROL0_TSEN_CHAN_SHIFT);
+ ctrl0 |= (channel - 1) << CONTROL0_TSEN_CHAN_SHIFT;
+ }
- /* Valid check */
- if (priv->data->is_valid && !priv->data->is_valid(priv)) {
- dev_err(&thermal->device,
+ /* Actually set the mode/channel */
+ regmap_write(priv->syscon, data->syscon_control0_off, ctrl0);
+ priv->current_channel = channel;
+
+ /* Re-start the measurements */
+ ctrl0 |= CONTROL0_TSEN_START;
+ regmap_write(priv->syscon, data->syscon_control0_off, ctrl0);
+
+ /*
+ * The IP has a latency of ~15ms, so after updating the selected source,
+ * we must absolutely wait for the sensor validity bit to ensure we read
+ * actual data.
+ */
+ if (armada_wait_sensor_validity(priv)) {
+ dev_err(priv->dev,
"Temperature sensor reading not valid\n");
return -EIO;
}
- reg = readl_relaxed(priv->status);
+ return 0;
+}
+
+static int armada_read_sensor(struct armada_thermal_priv *priv, int *temp)
+{
+ u32 reg, div;
+ s64 sample, b, m;
+
+ regmap_read(priv->syscon, priv->data->syscon_status_off, &reg);
reg = (reg >> priv->data->temp_shift) & priv->data->temp_mask;
if (priv->data->signed_sample)
/* The most significant bit is the sign bit */
@@ -247,45 +350,93 @@ static int armada_get_temp(struct thermal_zone_device *thermal,
return 0;
}
-static struct thermal_zone_device_ops ops = {
+static int armada_get_temp_legacy(struct thermal_zone_device *thermal,
+ int *temp)
+{
+ struct armada_thermal_priv *priv = thermal->devdata;
+ int ret;
+
+ /* Valid check */
+ if (armada_is_valid(priv)) {
+ dev_err(priv->dev,
+ "Temperature sensor reading not valid\n");
+ return -EIO;
+ }
+
+ /* Do the actual reading */
+ ret = armada_read_sensor(priv, temp);
+
+ return ret;
+}
+
+static struct thermal_zone_device_ops legacy_ops = {
+ .get_temp = armada_get_temp_legacy,
+};
+
+static int armada_get_temp(void *_sensor, int *temp)
+{
+ struct armada_thermal_sensor *sensor = _sensor;
+ struct armada_thermal_priv *priv = sensor->priv;
+ int ret;
+
+ mutex_lock(&priv->update_lock);
+
+ /* Select the desired channel */
+ ret = armada_select_channel(priv, sensor->id);
+ if (ret)
+ goto unlock_mutex;
+
+ /* Do the actual reading */
+ ret = armada_read_sensor(priv, temp);
+
+unlock_mutex:
+ mutex_unlock(&priv->update_lock);
+
+ return ret;
+}
+
+static struct thermal_zone_of_device_ops of_ops = {
.get_temp = armada_get_temp,
};
static const struct armada_thermal_data armadaxp_data = {
- .init_sensor = armadaxp_init_sensor,
+ .init = armadaxp_init,
.temp_shift = 10,
.temp_mask = 0x1ff,
.coef_b = 3153000000ULL,
.coef_m = 10000000ULL,
.coef_div = 13825,
+ .syscon_status_off = 0xb0,
+ .syscon_control1_off = 0xd0,
};
static const struct armada_thermal_data armada370_data = {
- .is_valid = armada_is_valid,
- .init_sensor = armada370_init_sensor,
+ .init = armada370_init,
.is_valid_bit = BIT(9),
.temp_shift = 10,
.temp_mask = 0x1ff,
.coef_b = 3153000000ULL,
.coef_m = 10000000ULL,
.coef_div = 13825,
+ .syscon_status_off = 0x0,
+ .syscon_control1_off = 0x4,
};
static const struct armada_thermal_data armada375_data = {
- .is_valid = armada_is_valid,
- .init_sensor = armada375_init_sensor,
+ .init = armada375_init,
.is_valid_bit = BIT(10),
.temp_shift = 0,
.temp_mask = 0x1ff,
.coef_b = 3171900000ULL,
.coef_m = 10000000ULL,
.coef_div = 13616,
- .needs_control0 = true,
+ .syscon_status_off = 0x78,
+ .syscon_control0_off = 0x7c,
+ .syscon_control1_off = 0x80,
};
static const struct armada_thermal_data armada380_data = {
- .is_valid = armada_is_valid,
- .init_sensor = armada380_init_sensor,
+ .init = armada380_init,
.is_valid_bit = BIT(10),
.temp_shift = 0,
.temp_mask = 0x3ff,
@@ -293,11 +444,13 @@ static const struct armada_thermal_data armada380_data = {
.coef_m = 2000096ULL,
.coef_div = 4201,
.inverted = true,
+ .syscon_control0_off = 0x70,
+ .syscon_control1_off = 0x74,
+ .syscon_status_off = 0x78,
};
static const struct armada_thermal_data armada_ap806_data = {
- .is_valid = armada_is_valid,
- .init_sensor = armada_ap806_init_sensor,
+ .init = armada_ap806_init,
.is_valid_bit = BIT(16),
.temp_shift = 0,
.temp_mask = 0x3ff,
@@ -306,12 +459,14 @@ static const struct armada_thermal_data armada_ap806_data = {
.coef_div = 1,
.inverted = true,
.signed_sample = true,
- .needs_control0 = true,
+ .syscon_control0_off = 0x84,
+ .syscon_control1_off = 0x88,
+ .syscon_status_off = 0x8C,
+ .cpu_nr = 4,
};
static const struct armada_thermal_data armada_cp110_data = {
- .is_valid = armada_is_valid,
- .init_sensor = armada380_init_sensor,
+ .init = armada_cp110_init,
.is_valid_bit = BIT(10),
.temp_shift = 0,
.temp_mask = 0x3ff,
@@ -319,7 +474,9 @@ static const struct armada_thermal_data armada_cp110_data = {
.coef_m = 2000096ULL,
.coef_div = 4201,
.inverted = true,
- .needs_control0 = true,
+ .syscon_control0_off = 0x70,
+ .syscon_control1_off = 0x74,
+ .syscon_status_off = 0x78,
};
static const struct of_device_id armada_thermal_id_table[] = {
@@ -353,13 +510,97 @@ static const struct of_device_id armada_thermal_id_table[] = {
};
MODULE_DEVICE_TABLE(of, armada_thermal_id_table);
+static const struct regmap_config armada_thermal_regmap_config = {
+ .reg_bits = 32,
+ .reg_stride = 4,
+ .val_bits = 32,
+ .fast_io = true,
+};
+
+static int armada_thermal_probe_legacy(struct platform_device *pdev,
+ struct armada_thermal_priv *priv)
+{
+ struct armada_thermal_data *data = priv->data;
+ struct resource *res;
+ void __iomem *base;
+
+ /* First memory region points towards the status register */
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (IS_ERR(res))
+ return PTR_ERR(res);
+
+ /*
+ * Edit the resource start address and length to map over all the
+ * registers, instead of pointing at them one by one.
+ */
+ res->start -= data->syscon_status_off;
+ res->end = res->start + max(data->syscon_status_off,
+ max(data->syscon_control0_off,
+ data->syscon_control1_off)) +
+ sizeof(unsigned int) - 1;
+
+ base = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(base))
+ return PTR_ERR(base);
+
+ priv->syscon = devm_regmap_init_mmio(&pdev->dev, base,
+ &armada_thermal_regmap_config);
+ if (IS_ERR(priv->syscon))
+ return PTR_ERR(priv->syscon);
+
+ return 0;
+}
+
+static int armada_thermal_probe_syscon(struct platform_device *pdev,
+ struct armada_thermal_priv *priv)
+{
+ priv->syscon = syscon_node_to_regmap(pdev->dev.parent->of_node);
+ if (IS_ERR(priv->syscon))
+ return PTR_ERR(priv->syscon);
+
+ return 0;
+}
+
+static void armada_set_sane_name(struct platform_device *pdev,
+ struct armada_thermal_priv *priv)
+{
+ const char *name = dev_name(&pdev->dev);
+ char *insane_char;
+
+ if (strlen(name) > THERMAL_NAME_LENGTH) {
+ /*
+ * When inside a system controller, the device name has the
+ * form: f06f8000.system-controller:ap-thermal so stripping
+ * after the ':' should give us a shorter but meaningful name.
+ */
+ name = strrchr(name, ':');
+ if (!name)
+ name = "armada_thermal";
+ else
+ name++;
+ }
+
+ /* Save the name locally */
+ strncpy(priv->zone_name, name, THERMAL_NAME_LENGTH - 1);
+ priv->zone_name[THERMAL_NAME_LENGTH - 1] = '\0';
+
+ /* Then check there are no '-' or hwmon core will complain */
+ do {
+ insane_char = strpbrk(priv->zone_name, "-");
+ if (insane_char)
+ *insane_char = '_';
+ } while (insane_char);
+}
+
static int armada_thermal_probe(struct platform_device *pdev)
{
- void __iomem *control = NULL;
- struct thermal_zone_device *thermal;
+ struct thermal_zone_device *tz;
+ struct armada_thermal_sensor *sensor;
+ struct armada_drvdata *drvdata;
const struct of_device_id *match;
struct armada_thermal_priv *priv;
- struct resource *res;
+ int sensor_id;
+ int ret;
match = of_match_device(armada_thermal_id_table, &pdev->dev);
if (!match)
@@ -369,58 +610,99 @@ static int armada_thermal_probe(struct platform_device *pdev)
if (!priv)
return -ENOMEM;
- res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- priv->status = devm_ioremap_resource(&pdev->dev, res);
- if (IS_ERR(priv->status))
- return PTR_ERR(priv->status);
-
- res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
- control = devm_ioremap_resource(&pdev->dev, res);
- if (IS_ERR(control))
- return PTR_ERR(control);
+ drvdata = devm_kzalloc(&pdev->dev, sizeof(*drvdata), GFP_KERNEL);
+ if (!drvdata)
+ return -ENOMEM;
+ priv->dev = &pdev->dev;
priv->data = (struct armada_thermal_data *)match->data;
+ mutex_init(&priv->update_lock);
+
/*
* Legacy DT bindings only described "control1" register (also referred
- * as "control MSB" on old documentation). New bindings cover
+ * as "control MSB" on old documentation). Then, bindings moved to cover
* "control0/control LSB" and "control1/control MSB" registers within
- * the same resource, which is then of size 8 instead of 4.
+ * the same resource, which was then of size 8 instead of 4.
+ *
+ * The logic of defining sporadic registers is broken. For instance, it
+ * blocked the addition of the overheat interrupt feature that needed
+ * another resource somewhere else in the same memory area. One solution
+ * is to define an overall system controller and put the thermal node
+ * into it, which requires the use of regmaps across all the driver.
*/
- if (resource_size(res) == LEGACY_CONTROL_MEM_LEN) {
- /* ->control0 unavailable in this configuration */
- if (priv->data->needs_control0) {
- dev_err(&pdev->dev, "No access to control0 register\n");
- return -EINVAL;
+ if (IS_ERR(syscon_node_to_regmap(pdev->dev.parent->of_node))) {
+ /* Ensure device name is correct for the thermal core */
+ armada_set_sane_name(pdev, priv);
+
+ ret = armada_thermal_probe_legacy(pdev, priv);
+ if (ret)
+ return ret;
+
+ priv->data->init(pdev, priv);
+
+ /* Wait the sensors to be valid */
+ armada_wait_sensor_validity(priv);
+
+ tz = thermal_zone_device_register(priv->zone_name, 0, 0, priv,
+ &legacy_ops, NULL, 0, 0);
+ if (IS_ERR(tz)) {
+ dev_err(&pdev->dev,
+ "Failed to register thermal zone device\n");
+ return PTR_ERR(tz);
}
- priv->control1 = control + LEGACY_CONTROL1_OFFSET;
- } else {
- priv->control0 = control + CONTROL0_OFFSET;
- priv->control1 = control + CONTROL1_OFFSET;
+ drvdata->type = LEGACY;
+ drvdata->data.tz = tz;
+ platform_set_drvdata(pdev, drvdata);
+
+ return 0;
}
- priv->data->init_sensor(pdev, priv);
+ ret = armada_thermal_probe_syscon(pdev, priv);
+ if (ret)
+ return ret;
- thermal = thermal_zone_device_register(dev_name(&pdev->dev), 0, 0, priv,
- &ops, NULL, 0, 0);
- if (IS_ERR(thermal)) {
- dev_err(&pdev->dev,
- "Failed to register thermal zone device\n");
- return PTR_ERR(thermal);
- }
+ priv->current_channel = -1;
+ priv->data->init(pdev, priv);
+ drvdata->type = SYSCON;
+ drvdata->data.priv = priv;
+ platform_set_drvdata(pdev, drvdata);
- platform_set_drvdata(pdev, thermal);
+ /*
+ * There is one channel for the IC and one per CPU (if any), each
+ * channel has one sensor.
+ */
+ for (sensor_id = 0; sensor_id <= priv->data->cpu_nr; sensor_id++) {
+ sensor = devm_kzalloc(&pdev->dev,
+ sizeof(struct armada_thermal_sensor),
+ GFP_KERNEL);
+ if (!sensor)
+ return -ENOMEM;
+
+ /* Register the sensor */
+ sensor->priv = priv;
+ sensor->id = sensor_id;
+ tz = devm_thermal_zone_of_sensor_register(&pdev->dev,
+ sensor->id, sensor,
+ &of_ops);
+ if (IS_ERR(tz)) {
+ dev_info(&pdev->dev, "Thermal sensor %d unavailable\n",
+ sensor_id);
+ devm_kfree(&pdev->dev, sensor);
+ continue;
+ }
+ }
return 0;
}
static int armada_thermal_exit(struct platform_device *pdev)
{
- struct thermal_zone_device *armada_thermal =
- platform_get_drvdata(pdev);
+ struct armada_drvdata *drvdata = platform_get_drvdata(pdev);
- thermal_zone_device_unregister(armada_thermal);
+ if (drvdata->type == LEGACY)
+ thermal_zone_device_unregister(drvdata->data.tz);
return 0;
}
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.