From 7ccaf9bdbcf792beee1d6b1a170bcf4b2c6e191f Mon Sep 17 00:00:00 2001 From: Paul Bolle Date: Fri, 28 Sep 2012 10:20:40 +1000 Subject: [PATCH] drivers/rtc/rtc-m41t80.c: remove disabled alarm functionality Commit c3b79770e51ab1fd ("rtc: m41t80: Workaround broken alarm functionality") disabled m41t80's alarm functions. But since those functions were not touched, building this driver triggers these GCC warnings: drivers/rtc/rtc-m41t80.c:216:12: warning: 'm41t80_rtc_alarm_irq_enable' defined but not used [-Wunused-function] drivers/rtc/rtc-m41t80.c:238:12: warning: 'm41t80_rtc_set_alarm' defined but not used [-Wunused-function] drivers/rtc/rtc-m41t80.c:308:12: warning: 'm41t80_rtc_read_alarm' defined but not used [-Wunused-function] Remove these functions (and the commented out references to them) to silence these warnings. Anyone wanting to fix the alarm irq functionality can easily find the removed code in the git log of this file or through some web searches. Signed-off-by: Paul Bolle Cc: John Stultz Signed-off-by: Andrew Morton --- drivers/rtc/rtc-m41t80.c | 157 +-------------------------------------- 1 file changed, 4 insertions(+), 153 deletions(-) diff --git a/drivers/rtc/rtc-m41t80.c b/drivers/rtc/rtc-m41t80.c index 4e0f84af99a7..b885bcd08908 100644 --- a/drivers/rtc/rtc-m41t80.c +++ b/drivers/rtc/rtc-m41t80.c @@ -213,163 +213,14 @@ static int m41t80_rtc_set_time(struct device *dev, struct rtc_time *tm) return m41t80_set_datetime(to_i2c_client(dev), tm); } -static int m41t80_rtc_alarm_irq_enable(struct device *dev, unsigned int enabled) -{ - struct i2c_client *client = to_i2c_client(dev); - int rc; - - rc = i2c_smbus_read_byte_data(client, M41T80_REG_ALARM_MON); - if (rc < 0) - goto err; - - if (enabled) - rc |= M41T80_ALMON_AFE; - else - rc &= ~M41T80_ALMON_AFE; - - if (i2c_smbus_write_byte_data(client, M41T80_REG_ALARM_MON, rc) < 0) - goto err; - - return 0; -err: - return -EIO; -} - -static int m41t80_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *t) -{ - struct i2c_client *client = to_i2c_client(dev); - u8 wbuf[1 + M41T80_ALARM_REG_SIZE]; - u8 *buf = &wbuf[1]; - u8 *reg = buf - M41T80_REG_ALARM_MON; - u8 dt_addr[1] = { M41T80_REG_ALARM_MON }; - struct i2c_msg msgs_in[] = { - { - .addr = client->addr, - .flags = 0, - .len = 1, - .buf = dt_addr, - }, - { - .addr = client->addr, - .flags = I2C_M_RD, - .len = M41T80_ALARM_REG_SIZE, - .buf = buf, - }, - }; - struct i2c_msg msgs[] = { - { - .addr = client->addr, - .flags = 0, - .len = 1 + M41T80_ALARM_REG_SIZE, - .buf = wbuf, - }, - }; - - if (i2c_transfer(client->adapter, msgs_in, 2) < 0) { - dev_err(&client->dev, "read error\n"); - return -EIO; - } - reg[M41T80_REG_ALARM_MON] &= ~(0x1f | M41T80_ALMON_AFE); - reg[M41T80_REG_ALARM_DAY] = 0; - reg[M41T80_REG_ALARM_HOUR] &= ~(0x3f | 0x80); - reg[M41T80_REG_ALARM_MIN] = 0; - reg[M41T80_REG_ALARM_SEC] = 0; - - wbuf[0] = M41T80_REG_ALARM_MON; /* offset into rtc's regs */ - reg[M41T80_REG_ALARM_SEC] |= t->time.tm_sec >= 0 ? - bin2bcd(t->time.tm_sec) : 0x80; - reg[M41T80_REG_ALARM_MIN] |= t->time.tm_min >= 0 ? - bin2bcd(t->time.tm_min) : 0x80; - reg[M41T80_REG_ALARM_HOUR] |= t->time.tm_hour >= 0 ? - bin2bcd(t->time.tm_hour) : 0x80; - reg[M41T80_REG_ALARM_DAY] |= t->time.tm_mday >= 0 ? - bin2bcd(t->time.tm_mday) : 0x80; - if (t->time.tm_mon >= 0) - reg[M41T80_REG_ALARM_MON] |= bin2bcd(t->time.tm_mon + 1); - else - reg[M41T80_REG_ALARM_DAY] |= 0x40; - - if (i2c_transfer(client->adapter, msgs, 1) != 1) { - dev_err(&client->dev, "write error\n"); - return -EIO; - } - - if (t->enabled) { - reg[M41T80_REG_ALARM_MON] |= M41T80_ALMON_AFE; - if (i2c_smbus_write_byte_data(client, M41T80_REG_ALARM_MON, - reg[M41T80_REG_ALARM_MON]) < 0) { - dev_err(&client->dev, "write error\n"); - return -EIO; - } - } - return 0; -} - -static int m41t80_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *t) -{ - struct i2c_client *client = to_i2c_client(dev); - u8 buf[M41T80_ALARM_REG_SIZE + 1]; /* all alarm regs and flags */ - u8 dt_addr[1] = { M41T80_REG_ALARM_MON }; - u8 *reg = buf - M41T80_REG_ALARM_MON; - struct i2c_msg msgs[] = { - { - .addr = client->addr, - .flags = 0, - .len = 1, - .buf = dt_addr, - }, - { - .addr = client->addr, - .flags = I2C_M_RD, - .len = M41T80_ALARM_REG_SIZE + 1, - .buf = buf, - }, - }; - - if (i2c_transfer(client->adapter, msgs, 2) < 0) { - dev_err(&client->dev, "read error\n"); - return -EIO; - } - t->time.tm_sec = -1; - t->time.tm_min = -1; - t->time.tm_hour = -1; - t->time.tm_mday = -1; - t->time.tm_mon = -1; - if (!(reg[M41T80_REG_ALARM_SEC] & 0x80)) - t->time.tm_sec = bcd2bin(reg[M41T80_REG_ALARM_SEC] & 0x7f); - if (!(reg[M41T80_REG_ALARM_MIN] & 0x80)) - t->time.tm_min = bcd2bin(reg[M41T80_REG_ALARM_MIN] & 0x7f); - if (!(reg[M41T80_REG_ALARM_HOUR] & 0x80)) - t->time.tm_hour = bcd2bin(reg[M41T80_REG_ALARM_HOUR] & 0x3f); - if (!(reg[M41T80_REG_ALARM_DAY] & 0x80)) - t->time.tm_mday = bcd2bin(reg[M41T80_REG_ALARM_DAY] & 0x3f); - if (!(reg[M41T80_REG_ALARM_DAY] & 0x40)) - t->time.tm_mon = bcd2bin(reg[M41T80_REG_ALARM_MON] & 0x1f) - 1; - t->time.tm_year = -1; - t->time.tm_wday = -1; - t->time.tm_yday = -1; - t->time.tm_isdst = -1; - t->enabled = !!(reg[M41T80_REG_ALARM_MON] & M41T80_ALMON_AFE); - t->pending = !!(reg[M41T80_REG_FLAGS] & M41T80_FLAGS_AF); - return 0; -} - +/* + * XXX - m41t80 alarm functionality is reported broken. + * until it is fixed, don't register alarm functions. + */ static struct rtc_class_ops m41t80_rtc_ops = { .read_time = m41t80_rtc_read_time, .set_time = m41t80_rtc_set_time, - /* - * XXX - m41t80 alarm functionality is reported broken. - * until it is fixed, don't register alarm functions. - * - .read_alarm = m41t80_rtc_read_alarm, - .set_alarm = m41t80_rtc_set_alarm, - */ .proc = m41t80_rtc_proc, - /* - * See above comment on broken alarm - * - .alarm_irq_enable = m41t80_rtc_alarm_irq_enable, - */ }; #if defined(CONFIG_RTC_INTF_SYSFS) || defined(CONFIG_RTC_INTF_SYSFS_MODULE) -- 2.39.5