diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/i2c/chips/m41t00.c | 49 |
1 files changed, 21 insertions, 28 deletions
diff --git a/drivers/i2c/chips/m41t00.c b/drivers/i2c/chips/m41t00.c index 99ab4ec3439..eb2be3e4416 100644 --- a/drivers/i2c/chips/m41t00.c +++ b/drivers/i2c/chips/m41t00.c @@ -1,6 +1,4 @@ /* - * drivers/i2c/chips/m41t00.c - * * I2C client/driver for the ST M41T00 Real-Time Clock chip. * * Author: Mark A. Greer <mgreer@mvista.com> @@ -13,9 +11,6 @@ /* * This i2c client/driver wedges between the drivers/char/genrtc.c RTC * interface and the SMBus interface of the i2c subsystem. - * It would be more efficient to use i2c msgs/i2c_transfer directly but, as - * recommened in .../Documentation/i2c/writing-clients section - * "Sending and receiving", using SMBus level communication is preferred. */ #include <linux/kernel.h> @@ -41,17 +36,17 @@ static unsigned short ignore[] = { I2C_CLIENT_END }; static unsigned short normal_addr[] = { 0x68, I2C_CLIENT_END }; static struct i2c_client_address_data addr_data = { - .normal_i2c = normal_addr, - .probe = ignore, - .ignore = ignore, + .normal_i2c = normal_addr, + .probe = ignore, + .ignore = ignore, }; ulong m41t00_get_rtc_time(void) { - s32 sec, min, hour, day, mon, year; - s32 sec1, min1, hour1, day1, mon1, year1; - ulong limit = 10; + s32 sec, min, hour, day, mon, year; + s32 sec1, min1, hour1, day1, mon1, year1; + ulong limit = 10; sec = min = hour = day = mon = year = 0; sec1 = min1 = hour1 = day1 = mon1 = year1 = 0; @@ -97,12 +92,12 @@ m41t00_get_rtc_time(void) mon &= 0x1f; year &= 0xff; - BCD_TO_BIN(sec); - BCD_TO_BIN(min); - BCD_TO_BIN(hour); - BCD_TO_BIN(day); - BCD_TO_BIN(mon); - BCD_TO_BIN(year); + sec = BCD2BIN(sec); + min = BCD2BIN(min); + hour = BCD2BIN(hour); + day = BCD2BIN(day); + mon = BCD2BIN(mon); + year = BCD2BIN(year); year += 1900; if (year < 1970) @@ -115,17 +110,17 @@ static void m41t00_set(void *arg) { struct rtc_time tm; - ulong nowtime = *(ulong *)arg; + ulong nowtime = *(ulong *)arg; to_tm(nowtime, &tm); tm.tm_year = (tm.tm_year - 1900) % 100; - BIN_TO_BCD(tm.tm_sec); - BIN_TO_BCD(tm.tm_min); - BIN_TO_BCD(tm.tm_hour); - BIN_TO_BCD(tm.tm_mon); - BIN_TO_BCD(tm.tm_mday); - BIN_TO_BCD(tm.tm_year); + tm.tm_sec = BIN2BCD(tm.tm_sec); + tm.tm_min = BIN2BCD(tm.tm_min); + tm.tm_hour = BIN2BCD(tm.tm_hour); + tm.tm_mon = BIN2BCD(tm.tm_mon); + tm.tm_mday = BIN2BCD(tm.tm_mday); + tm.tm_year = BIN2BCD(tm.tm_year); mutex_lock(&m41t00_mutex); if ((i2c_smbus_write_byte_data(save_client, 0, tm.tm_sec & 0x7f) < 0) @@ -143,7 +138,6 @@ m41t00_set(void *arg) dev_warn(&save_client->dev,"m41t00: can't write to rtc chip\n"); mutex_unlock(&m41t00_mutex); - return; } static ulong new_time; @@ -180,7 +174,7 @@ m41t00_probe(struct i2c_adapter *adap, int addr, int kind) if (!client) return -ENOMEM; - strncpy(client->name, M41T00_DRV_NAME, I2C_NAME_SIZE); + strlcpy(client->name, M41T00_DRV_NAME, I2C_NAME_SIZE); client->addr = addr; client->adapter = adap; client->driver = &m41t00_driver; @@ -204,7 +198,7 @@ m41t00_attach(struct i2c_adapter *adap) static int m41t00_detach(struct i2c_client *client) { - int rc; + int rc; if ((rc = i2c_detach_client(client)) == 0) { kfree(client); @@ -232,7 +226,6 @@ static void __exit m41t00_exit(void) { i2c_del_driver(&m41t00_driver); - return; } module_init(m41t00_init); |