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| author | Heiner Kallweit <hkallweit1@gmail.com> | 2017-07-12 07:49:37 +0200 |
|---|---|---|
| committer | Alexandre Belloni <alexandre.belloni@free-electrons.com> | 2017-09-01 01:10:15 +0200 |
| commit | 82e2d43f6315d7ae8cca1d00c94f25df0f17eb85 (patch) | |
| tree | d4b45ee711b5bcd1c15b4de04f40e1e662f5180a /drivers/rtc | |
| parent | 7624df482d7aba599a92ebe1a1fab3e27749b658 (diff) | |
| download | linux-82e2d43f6315d7ae8cca1d00c94f25df0f17eb85.tar.gz linux-82e2d43f6315d7ae8cca1d00c94f25df0f17eb85.tar.bz2 linux-82e2d43f6315d7ae8cca1d00c94f25df0f17eb85.zip | |
rtc: ds1307: improve irq setup
Change the usage of variable want_irq to reflect its name. Don't set
it to true in case wakeup is enabled but no interrupt number is given.
In addition set variable ds1307_can_wakeup_device if chip->alarm
is set only.
This allows to simplify the code and make it better understandable.
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Diffstat (limited to 'drivers/rtc')
| -rw-r--r-- | drivers/rtc/rtc-ds1307.c | 27 |
1 files changed, 10 insertions, 17 deletions
diff --git a/drivers/rtc/rtc-ds1307.c b/drivers/rtc/rtc-ds1307.c index 73d2084f0f3e..9cb2924e1828 100644 --- a/drivers/rtc/rtc-ds1307.c +++ b/drivers/rtc/rtc-ds1307.c @@ -1312,7 +1312,7 @@ static int ds1307_probe(struct i2c_client *client, int err = -ENODEV; int tmp, wday; const struct chip_desc *chip; - bool want_irq = false; + bool want_irq; bool ds1307_can_wakeup_device = false; unsigned char *buf; struct ds1307_platform_data *pdata = dev_get_platdata(&client->dev); @@ -1358,6 +1358,8 @@ static int ds1307_probe(struct i2c_client *client, ds1307->type = acpi_id->driver_data; } + want_irq = client->irq > 0 && chip->alarm; + if (!pdata) trickle_charger_setup = ds1307_trickle_init(ds1307, chip); else if (pdata->trickle_charger_setup) @@ -1383,7 +1385,8 @@ static int ds1307_probe(struct i2c_client *client, * This will guarantee the 'wakealarm' sysfs entry is available on the device, * if supported by the RTC. */ - if (of_property_read_bool(client->dev.of_node, "wakeup-source")) + if (chip->alarm && of_property_read_bool(client->dev.of_node, + "wakeup-source")) ds1307_can_wakeup_device = true; #endif @@ -1409,12 +1412,9 @@ static int ds1307_probe(struct i2c_client *client, * For some variants, be sure alarms can trigger when we're * running on Vbackup (BBSQI/BBSQW) */ - if (chip->alarm && (client->irq > 0 || - ds1307_can_wakeup_device)) { + if (want_irq || ds1307_can_wakeup_device) { ds1307->regs[0] |= DS1337_BIT_INTCN | chip->bbsqi_bit; ds1307->regs[0] &= ~(DS1337_BIT_A2IE | DS1337_BIT_A1IE); - - want_irq = true; } regmap_write(ds1307->regmap, DS1337_REG_CONTROL, @@ -1493,21 +1493,16 @@ static int ds1307_probe(struct i2c_client *client, case rx_8130: ds1307->offset = 0x10; /* Seconds starts at 0x10 */ rtc_ops = &rx8130_rtc_ops; - if (chip->alarm && client->irq > 0) { + if (want_irq) irq_handler = rx8130_irq; - want_irq = true; - } break; case ds_1388: ds1307->offset = 1; /* Seconds starts at 1 */ break; case mcp794xx: rtc_ops = &mcp794xx_rtc_ops; - if (chip->alarm && (client->irq > 0 || - ds1307_can_wakeup_device)) { + if (want_irq || ds1307_can_wakeup_device) irq_handler = mcp794xx_irq; - want_irq = true; - } break; default: break; @@ -1639,7 +1634,7 @@ read_rtc: MCP794XX_REG_WEEKDAY_WDAY_MASK, tm.tm_wday + 1); - if (want_irq) { + if (want_irq || ds1307_can_wakeup_device) { device_set_wakeup_capable(ds1307->dev, true); set_bit(HAS_ALARM, &ds1307->flags); } @@ -1649,9 +1644,7 @@ read_rtc: return PTR_ERR(ds1307->rtc); } - if (ds1307_can_wakeup_device && client->irq <= 0) { - /* Disable request for an IRQ */ - want_irq = false; + if (ds1307_can_wakeup_device && !want_irq) { dev_info(ds1307->dev, "'wakeup-source' is set, request for an IRQ is disabled!\n"); /* We cannot support UIE mode if we do not have an IRQ line */ |