static void omap_sensor_delayed_work_fn(struct work_struct *work)
{
struct omap_temp_sensor *temp_sensor =
container_of(work, struct omap_temp_sensor,
omap_sensor_work.work);
omap_report_temp(temp_sensor->therm_fw);
schedule_delayed_work(&temp_sensor->omap_sensor_work,
msecs_to_jiffies(temp_sensor->work_delay));
}
static int __devinit omap_temp_sensor_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct omap_temp_sensor_pdata *pdata = pdev->dev.platform_data;
struct omap_temp_sensor *temp_sensor;
struct resource *mem;
int ret = 0, val;
if (!pdata) {
dev_err(&pdev->dev, "%s: platform data missing\n", __func__);
return -EINVAL;
}
temp_sensor = kzalloc(sizeof(struct omap_temp_sensor), GFP_KERNEL);
if (!temp_sensor)
return -ENOMEM;
spin_lock_init(&temp_sensor->lock);
mutex_init(&temp_sensor->sensor_mutex);
mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!mem) {
dev_err(&pdev->dev, "%s:no mem resource\n", __func__);
ret = -EINVAL;
goto plat_res_err;
}
temp_sensor->irq = platform_get_irq_byname(pdev, "thermal_alert");
if (temp_sensor->irq < 0) {
dev_err(&pdev->dev, "%s:Cannot get thermal alert irq\n",
__func__);
ret = -EINVAL;
goto get_irq_err;
}
ret = gpio_request_one(OMAP_TSHUT_GPIO, GPIOF_DIR_IN,
"thermal_shutdown");
if (ret) {
dev_err(&pdev->dev, "%s: Could not get tshut_gpio\n",
__func__);
goto tshut_gpio_req_err;
}
temp_sensor->tshut_irq = gpio_to_irq(OMAP_TSHUT_GPIO);
if (temp_sensor->tshut_irq < 0) {
dev_err(&pdev->dev, "%s:Cannot get thermal shutdown irq\n",
__func__);
ret = -EINVAL;
goto get_tshut_irq_err;
}
temp_sensor->phy_base = pdata->offset;
temp_sensor->pdev = pdev;
temp_sensor->dev = dev;
pm_runtime_enable(dev);
pm_runtime_irq_safe(dev);
kobject_uevent(&pdev->dev.kobj, KOBJ_ADD);
platform_set_drvdata(pdev, temp_sensor);
/*
* check if the efuse has a non-zero value if not
* it is an untrimmed sample and the temperatures
* may not be accurate */
if (omap_readl(OMAP4_CTRL_MODULE_CORE +
OMAP4_CTRL_MODULE_CORE_STD_FUSE_OPP_BGAP))
temp_sensor->is_efuse_valid = 1;
temp_sensor->clock = clk_get(&temp_sensor->pdev->dev, "fck");
if (IS_ERR(temp_sensor->clock)) {
ret = PTR_ERR(temp_sensor->clock);
pr_err("%s:Unable to get fclk: %d\n", __func__, ret);
ret = -EINVAL;
goto clk_get_err;
}
ret = omap_temp_sensor_enable(temp_sensor);
if (ret) {
dev_err(&pdev->dev, "%s:Cannot enable temp sensor\n", __func__);
goto sensor_enable_err;
}
temp_sensor->therm_fw = kzalloc(sizeof(struct thermal_dev), GFP_KERNEL);
if (temp_sensor->therm_fw) {
temp_sensor->therm_fw->name = "omap_ondie_sensor";
temp_sensor->therm_fw->domain_name = "cpu";
temp_sensor->therm_fw->dev = temp_sensor->dev;
temp_sensor->therm_fw->dev_ops = &omap_sensor_ops;
thermal_sensor_dev_register(temp_sensor->therm_fw);
} else {
dev_err(&pdev->dev, "%s:Cannot alloc memory for thermal fw\n",
__func__);
ret = -ENOMEM;
goto therm_fw_alloc_err;
}
omap_enable_continuous_mode(temp_sensor, 1);
omap_configure_temp_sensor_thresholds(temp_sensor);
/* 1 ms */
omap_configure_temp_sensor_counter(temp_sensor, 1);
/* Wait till the first conversion is done wait for at least 1ms */
mdelay(2);
/* Read the temperature once due to hw issue*/
omap_report_temp(temp_sensor->therm_fw);
/* Set 250 milli-seconds time as default counter */
omap_configure_temp_sensor_counter(temp_sensor,
temp_sensor->clk_rate * 250 / 1000);
ret = sysfs_create_group(&pdev->dev.kobj,
&omap_temp_sensor_group);
if (ret) {
dev_err(&pdev->dev, "could not create sysfs files\n");
goto sysfs_create_err;
}
ret = request_threaded_irq(temp_sensor->irq, NULL,
omap_talert_irq_handler,
IRQF_TRIGGER_HIGH | IRQF_ONESHOT,
"temp_sensor", (void *)temp_sensor);
if (ret) {
dev_err(&pdev->dev, "Request threaded irq failed.\n");
goto req_irq_err;
}
ret = request_threaded_irq(temp_sensor->tshut_irq, NULL,
omap_tshut_irq_handler,
IRQF_TRIGGER_RISING | IRQF_ONESHOT,
"tshut", (void *)temp_sensor);
if (ret) {
dev_err(&pdev->dev, "Request threaded irq failed for TSHUT.\n");
goto tshut_irq_req_err;
}
/* unmask the T_COLD and unmask T_HOT at init */
val = omap_temp_sensor_readl(temp_sensor, BGAP_CTRL_OFFSET);
val |= OMAP4_MASK_COLD_MASK;
val |= OMAP4_MASK_HOT_MASK;
omap_temp_sensor_writel(temp_sensor, val, BGAP_CTRL_OFFSET);
dev_info(&pdev->dev, "%s : '%s'\n", temp_sensor->therm_fw->name,
pdata->name);
temp_sensor_pm = temp_sensor;
return 0;
tshut_irq_req_err:
free_irq(temp_sensor->irq, temp_sensor);
req_irq_err:
kobject_uevent(&temp_sensor->dev->kobj, KOBJ_REMOVE);
sysfs_remove_group(&temp_sensor->dev->kobj, &omap_temp_sensor_group);
sysfs_create_err:
thermal_sensor_dev_unregister(temp_sensor->therm_fw);
kfree(temp_sensor->therm_fw);
if (temp_sensor->clock)
clk_put(temp_sensor->clock);
platform_set_drvdata(pdev, NULL);
therm_fw_alloc_err:
omap_temp_sensor_disable(temp_sensor);
sensor_enable_err:
clk_put(temp_sensor->clock);
clk_get_err:
pm_runtime_disable(&pdev->dev);
get_tshut_irq_err:
gpio_free(OMAP_TSHUT_GPIO);
tshut_gpio_req_err:
get_irq_err:
plat_res_err:
mutex_destroy(&temp_sensor->sensor_mutex);
kfree(temp_sensor);
return ret;
}