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rtc: isl1208: Introduce driver state struct 

This driver has no state of its own, depending entirely on what is in
the generic rtc device.

Intoduce a state struct.  For now it only contains a pointer to the rtc
device struct, but future patches will add more data.

Cc: Alessandro Zummo <a.zummo@towertech.it>
Cc: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Trent Piepho <tpiepho@impinj.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
This commit is contained in:
Trent Piepho 2019-02-12 02:34:03 +00:00 committed by Alexandre Belloni
parent 5736610ab6
commit ed3c52a075
1 changed files with 21 additions and 12 deletions
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33
drivers/rtc/rtc-isl1208.c
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@ -79,6 +79,11 @@ enum {
TYPE_ISL1219,
};
/* Device state */
struct isl1208_state {
struct rtc_device *rtc;
};
/* block read */
static int
isl1208_i2c_read_regs(struct i2c_client *client, u8 reg, u8 buf[],
@ -557,7 +562,7 @@ isl1208_rtc_interrupt(int irq, void *data)
{
unsigned long timeout = jiffies + msecs_to_jiffies(1000);
struct i2c_client *client = data;
struct rtc_device *rtc = i2c_get_clientdata(client);
struct isl1208_state *isl1208 = i2c_get_clientdata(client);
int handled = 0, sr, err;
/*
@ -580,7 +585,7 @@ isl1208_rtc_interrupt(int irq, void *data)
if (sr & ISL1208_REG_SR_ALM) {
dev_dbg(&client->dev, "alarm!\n");
rtc_update_irq(rtc, 1, RTC_IRQF | RTC_AF);
rtc_update_irq(isl1208->rtc, 1, RTC_IRQF | RTC_AF);
/* Clear the alarm */
sr &= ~ISL1208_REG_SR_ALM;
@ -598,7 +603,7 @@ isl1208_rtc_interrupt(int irq, void *data)
}
if (sr & ISL1208_REG_SR_EVT) {
sysfs_notify(&rtc->dev.kobj, NULL,
sysfs_notify(&isl1208->rtc->dev.kobj, NULL,
dev_attr_timestamp0.attr.name);
dev_warn(&client->dev, "event detected");
handled = 1;
@ -723,7 +728,7 @@ static int
isl1208_probe(struct i2c_client *client, const struct i2c_device_id *id)
{
int rc = 0;
struct rtc_device *rtc;
struct isl1208_state *isl1208;
int evdet_irq = -1;
if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C))
@ -732,13 +737,17 @@ isl1208_probe(struct i2c_client *client, const struct i2c_device_id *id)
if (isl1208_i2c_validate_client(client) < 0)
return -ENODEV;
rtc = devm_rtc_allocate_device(&client->dev);
if (IS_ERR(rtc))
return PTR_ERR(rtc);
/* Allocate driver state, point i2c client data to it */
isl1208 = devm_kzalloc(&client->dev, sizeof(*isl1208), GFP_KERNEL);
if (!isl1208)
return -ENOMEM;
i2c_set_clientdata(client, isl1208);
rtc->ops = &isl1208_rtc_ops;
isl1208->rtc = devm_rtc_allocate_device(&client->dev);
if (IS_ERR(isl1208->rtc))
return PTR_ERR(isl1208->rtc);
i2c_set_clientdata(client, rtc);
isl1208->rtc->ops = &isl1208_rtc_ops;
rc = isl1208_i2c_get_sr(client);
if (rc < 0) {
@ -771,13 +780,13 @@ isl1208_probe(struct i2c_client *client, const struct i2c_device_id *id)
dev_err(&client->dev, "could not enable tamper detection\n");
return rc;
}
rc = rtc_add_group(rtc, &isl1219_rtc_sysfs_files);
rc = rtc_add_group(isl1208->rtc, &isl1219_rtc_sysfs_files);
if (rc)
return rc;
evdet_irq = of_irq_get_byname(np, "evdet");
}
rc = rtc_add_group(rtc, &isl1208_rtc_sysfs_files);
rc = rtc_add_group(isl1208->rtc, &isl1208_rtc_sysfs_files);
if (rc)
return rc;
@ -791,7 +800,7 @@ isl1208_probe(struct i2c_client *client, const struct i2c_device_id *id)
if (rc)
return rc;
return rtc_register_device(rtc);
return rtc_register_device(isl1208->rtc);
}
static const struct i2c_device_id isl1208_id[] = {