diff options
| author | Ingo Molnar <mingo@kernel.org> | 2020-02-24 13:36:09 +0300 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2020-02-24 13:36:09 +0300 |
| commit | 546121b65f47384e11ec1fa2e55449fc9f4846b2 (patch) | |
| tree | 8f18470ec7c0c77b0f48eb1b2338e591b0b0aaff /drivers/rtc/rtc-pcf8563.c | |
| parent | 000619680c3714020ce9db17eef6a4a7ce2dc28b (diff) | |
| parent | f8788d86ab28f61f7b46eb6be375f8a726783636 (diff) | |
| download | linux-546121b65f47384e11ec1fa2e55449fc9f4846b2.tar.xz | |
Merge tag 'v5.6-rc3' into sched/core, to pick up fixes and dependent patches
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'drivers/rtc/rtc-pcf8563.c')
| -rw-r--r-- | drivers/rtc/rtc-pcf8563.c | 40 |
1 files changed, 9 insertions, 31 deletions
diff --git a/drivers/rtc/rtc-pcf8563.c b/drivers/rtc/rtc-pcf8563.c index 3c322f3079b0..2dc30eafa639 100644 --- a/drivers/rtc/rtc-pcf8563.c +++ b/drivers/rtc/rtc-pcf8563.c @@ -22,8 +22,8 @@ #define PCF8563_REG_ST1 0x00 /* status */ #define PCF8563_REG_ST2 0x01 -#define PCF8563_BIT_AIE (1 << 1) -#define PCF8563_BIT_AF (1 << 3) +#define PCF8563_BIT_AIE BIT(1) +#define PCF8563_BIT_AF BIT(3) #define PCF8563_BITS_ST2_N (7 << 5) #define PCF8563_REG_SC 0x02 /* datetime */ @@ -76,7 +76,6 @@ struct pcf8563 { * 1970...2069. */ int c_polarity; /* 0: MO_C=1 means 19xx, otherwise MO_C=1 means 20xx */ - int voltage_low; /* incicates if a low_voltage was detected */ struct i2c_client *client; #ifdef CONFIG_COMMON_CLK @@ -208,7 +207,6 @@ static int pcf8563_rtc_read_time(struct device *dev, struct rtc_time *tm) return err; if (buf[PCF8563_REG_SC] & PCF8563_SC_LV) { - pcf8563->voltage_low = 1; dev_err(&client->dev, "low voltage detected, date/time is not reliable.\n"); return -EINVAL; @@ -276,43 +274,23 @@ static int pcf8563_rtc_set_time(struct device *dev, struct rtc_time *tm) 9 - PCF8563_REG_SC, buf + PCF8563_REG_SC); } -#ifdef CONFIG_RTC_INTF_DEV static int pcf8563_rtc_ioctl(struct device *dev, unsigned int cmd, unsigned long arg) { - struct pcf8563 *pcf8563 = i2c_get_clientdata(to_i2c_client(dev)); - struct rtc_time tm; + struct i2c_client *client = to_i2c_client(dev); + int ret; switch (cmd) { case RTC_VL_READ: - if (pcf8563->voltage_low) - dev_info(dev, "low voltage detected, date/time is not reliable.\n"); - - if (copy_to_user((void __user *)arg, &pcf8563->voltage_low, - sizeof(int))) - return -EFAULT; - return 0; - case RTC_VL_CLR: - /* - * Clear the VL bit in the seconds register in case - * the time has not been set already (which would - * have cleared it). This does not really matter - * because of the cached voltage_low value but do it - * anyway for consistency. - */ - if (pcf8563_rtc_read_time(dev, &tm)) - pcf8563_rtc_set_time(dev, &tm); - - /* Clear the cached value. */ - pcf8563->voltage_low = 0; + ret = i2c_smbus_read_byte_data(client, PCF8563_REG_SC); + if (ret < 0) + return ret; - return 0; + return put_user(ret & PCF8563_SC_LV ? RTC_VL_DATA_INVALID : 0, + (unsigned int __user *)arg); default: return -ENOIOCTLCMD; } } -#else -#define pcf8563_rtc_ioctl NULL -#endif static int pcf8563_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *tm) { |