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path: root/drivers/hwmon/sht15.c
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Diffstat (limited to 'drivers/hwmon/sht15.c')
-rw-r--r--drivers/hwmon/sht15.c154
1 files changed, 44 insertions, 110 deletions
diff --git a/drivers/hwmon/sht15.c b/drivers/hwmon/sht15.c
index 8b011d016621..07a0c1a0b84d 100644
--- a/drivers/hwmon/sht15.c
+++ b/drivers/hwmon/sht15.c
@@ -1,7 +1,7 @@
/*
* sht15.c - support for the SHT15 Temperature and Humidity Sensor
*
- * Portions Copyright (c) 2010-2011 Savoir-faire Linux Inc.
+ * Portions Copyright (c) 2010-2012 Savoir-faire Linux Inc.
* Jerome Oufella <jerome.oufella@savoirfairelinux.com>
* Vivien Didelot <vivien.didelot@savoirfairelinux.com>
*
@@ -24,12 +24,12 @@
#include <linux/hwmon.h>
#include <linux/hwmon-sysfs.h>
#include <linux/mutex.h>
+#include <linux/platform_data/sht15.h>
#include <linux/platform_device.h>
#include <linux/sched.h>
#include <linux/delay.h>
#include <linux/jiffies.h>
#include <linux/err.h>
-#include <linux/sht15.h>
#include <linux/regulator/consumer.h>
#include <linux/slab.h>
#include <linux/atomic.h>
@@ -53,6 +53,9 @@
#define SHT15_STATUS_HEATER 0x04
#define SHT15_STATUS_LOW_BATTERY 0x40
+/* List of supported chips */
+enum sht15_chips { sht10, sht11, sht15, sht71, sht75 };
+
/* Actions the driver may be doing */
enum sht15_state {
SHT15_READING_NOTHING,
@@ -884,14 +887,12 @@ static int sht15_invalidate_voltage(struct notifier_block *nb,
static int __devinit sht15_probe(struct platform_device *pdev)
{
int ret;
- struct sht15_data *data = kzalloc(sizeof(*data), GFP_KERNEL);
+ struct sht15_data *data;
u8 status = 0;
- if (!data) {
- ret = -ENOMEM;
- dev_err(&pdev->dev, "kzalloc failed\n");
- goto error_ret;
- }
+ data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
+ if (!data)
+ return -ENOMEM;
INIT_WORK(&data->read_work, sht15_bh_read_data);
INIT_WORK(&data->update_supply_work, sht15_update_voltage);
@@ -901,9 +902,8 @@ static int __devinit sht15_probe(struct platform_device *pdev)
init_waitqueue_head(&data->wait_queue);
if (pdev->dev.platform_data == NULL) {
- ret = -EINVAL;
dev_err(&pdev->dev, "no platform data supplied\n");
- goto err_free_data;
+ return -EINVAL;
}
data->pdata = pdev->dev.platform_data;
data->supply_uV = data->pdata->supply_mv * 1000;
@@ -918,7 +918,7 @@ static int __devinit sht15_probe(struct platform_device *pdev)
* If a regulator is available,
* query what the supply voltage actually is!
*/
- data->reg = regulator_get(data->dev, "vcc");
+ data->reg = devm_regulator_get(data->dev, "vcc");
if (!IS_ERR(data->reg)) {
int voltage;
@@ -937,51 +937,51 @@ static int __devinit sht15_probe(struct platform_device *pdev)
dev_err(&pdev->dev,
"regulator notifier request failed\n");
regulator_disable(data->reg);
- regulator_put(data->reg);
- goto err_free_data;
+ return ret;
}
}
/* Try requesting the GPIOs */
- ret = gpio_request(data->pdata->gpio_sck, "SHT15 sck");
+ ret = devm_gpio_request(&pdev->dev, data->pdata->gpio_sck, "SHT15 sck");
if (ret) {
dev_err(&pdev->dev, "gpio request failed\n");
goto err_release_reg;
}
gpio_direction_output(data->pdata->gpio_sck, 0);
- ret = gpio_request(data->pdata->gpio_data, "SHT15 data");
+ ret = devm_gpio_request(&pdev->dev, data->pdata->gpio_data,
+ "SHT15 data");
if (ret) {
dev_err(&pdev->dev, "gpio request failed\n");
- goto err_release_gpio_sck;
+ goto err_release_reg;
}
- ret = request_irq(gpio_to_irq(data->pdata->gpio_data),
- sht15_interrupt_fired,
- IRQF_TRIGGER_FALLING,
- "sht15 data",
- data);
+ ret = devm_request_irq(&pdev->dev, gpio_to_irq(data->pdata->gpio_data),
+ sht15_interrupt_fired,
+ IRQF_TRIGGER_FALLING,
+ "sht15 data",
+ data);
if (ret) {
dev_err(&pdev->dev, "failed to get irq for data line\n");
- goto err_release_gpio_data;
+ goto err_release_reg;
}
disable_irq_nosync(gpio_to_irq(data->pdata->gpio_data));
sht15_connection_reset(data);
ret = sht15_soft_reset(data);
if (ret)
- goto err_release_irq;
+ goto err_release_reg;
/* write status with platform data options */
if (status) {
ret = sht15_send_status(data, status);
if (ret)
- goto err_release_irq;
+ goto err_release_reg;
}
ret = sysfs_create_group(&pdev->dev.kobj, &sht15_attr_group);
if (ret) {
dev_err(&pdev->dev, "sysfs create failed\n");
- goto err_release_irq;
+ goto err_release_reg;
}
data->hwmon_dev = hwmon_device_register(data->dev);
@@ -994,21 +994,11 @@ static int __devinit sht15_probe(struct platform_device *pdev)
err_release_sysfs_group:
sysfs_remove_group(&pdev->dev.kobj, &sht15_attr_group);
-err_release_irq:
- free_irq(gpio_to_irq(data->pdata->gpio_data), data);
-err_release_gpio_data:
- gpio_free(data->pdata->gpio_data);
-err_release_gpio_sck:
- gpio_free(data->pdata->gpio_sck);
err_release_reg:
if (!IS_ERR(data->reg)) {
regulator_unregister_notifier(data->reg, &data->nb);
regulator_disable(data->reg);
- regulator_put(data->reg);
}
-err_free_data:
- kfree(data);
-error_ret:
return ret;
}
@@ -1030,89 +1020,33 @@ static int __devexit sht15_remove(struct platform_device *pdev)
if (!IS_ERR(data->reg)) {
regulator_unregister_notifier(data->reg, &data->nb);
regulator_disable(data->reg);
- regulator_put(data->reg);
}
- free_irq(gpio_to_irq(data->pdata->gpio_data), data);
- gpio_free(data->pdata->gpio_data);
- gpio_free(data->pdata->gpio_sck);
mutex_unlock(&data->read_lock);
- kfree(data);
return 0;
}
-/*
- * sht_drivers simultaneously refers to __devinit and __devexit function
- * which causes spurious section mismatch warning. So use __refdata to
- * get rid from this.
- */
-static struct platform_driver __refdata sht_drivers[] = {
- {
- .driver = {
- .name = "sht10",
- .owner = THIS_MODULE,
- },
- .probe = sht15_probe,
- .remove = __devexit_p(sht15_remove),
- }, {
- .driver = {
- .name = "sht11",
- .owner = THIS_MODULE,
- },
- .probe = sht15_probe,
- .remove = __devexit_p(sht15_remove),
- }, {
- .driver = {
- .name = "sht15",
- .owner = THIS_MODULE,
- },
- .probe = sht15_probe,
- .remove = __devexit_p(sht15_remove),
- }, {
- .driver = {
- .name = "sht71",
- .owner = THIS_MODULE,
- },
- .probe = sht15_probe,
- .remove = __devexit_p(sht15_remove),
- }, {
- .driver = {
- .name = "sht75",
- .owner = THIS_MODULE,
- },
- .probe = sht15_probe,
- .remove = __devexit_p(sht15_remove),
- },
+static struct platform_device_id sht15_device_ids[] = {
+ { "sht10", sht10 },
+ { "sht11", sht11 },
+ { "sht15", sht15 },
+ { "sht71", sht71 },
+ { "sht75", sht75 },
+ { }
};
+MODULE_DEVICE_TABLE(platform, sht15_device_ids);
-static int __init sht15_init(void)
-{
- int ret;
- int i;
-
- for (i = 0; i < ARRAY_SIZE(sht_drivers); i++) {
- ret = platform_driver_register(&sht_drivers[i]);
- if (ret)
- goto error_unreg;
- }
-
- return 0;
-
-error_unreg:
- while (--i >= 0)
- platform_driver_unregister(&sht_drivers[i]);
-
- return ret;
-}
-module_init(sht15_init);
-
-static void __exit sht15_exit(void)
-{
- int i;
- for (i = ARRAY_SIZE(sht_drivers) - 1; i >= 0; i--)
- platform_driver_unregister(&sht_drivers[i]);
-}
-module_exit(sht15_exit);
+static struct platform_driver sht15_driver = {
+ .driver = {
+ .name = "sht15",
+ .owner = THIS_MODULE,
+ },
+ .probe = sht15_probe,
+ .remove = __devexit_p(sht15_remove),
+ .id_table = sht15_device_ids,
+};
+module_platform_driver(sht15_driver);
MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Sensirion SHT15 temperature and humidity sensor driver");
generated by cgit v1.2.3 (git 2.39.0) at 2024-12-18 20:46:55 +0300