diff options
Diffstat (limited to 'drivers/i2c')
-rw-r--r-- | drivers/i2c/chips/rtc8564.c | 36 |
1 files changed, 17 insertions, 19 deletions
diff --git a/drivers/i2c/chips/rtc8564.c b/drivers/i2c/chips/rtc8564.c index 916cdc1af23c..26e498d921da 100644 --- a/drivers/i2c/chips/rtc8564.c +++ b/drivers/i2c/chips/rtc8564.c | |||
@@ -14,6 +14,7 @@ | |||
14 | */ | 14 | */ |
15 | #include <linux/module.h> | 15 | #include <linux/module.h> |
16 | #include <linux/kernel.h> | 16 | #include <linux/kernel.h> |
17 | #include <linux/bcd.h> | ||
17 | #include <linux/i2c.h> | 18 | #include <linux/i2c.h> |
18 | #include <linux/slab.h> | 19 | #include <linux/slab.h> |
19 | #include <linux/string.h> | 20 | #include <linux/string.h> |
@@ -52,9 +53,6 @@ static inline u8 _rtc8564_ctrl2(struct i2c_client *client) | |||
52 | #define CTRL1(c) _rtc8564_ctrl1(c) | 53 | #define CTRL1(c) _rtc8564_ctrl1(c) |
53 | #define CTRL2(c) _rtc8564_ctrl2(c) | 54 | #define CTRL2(c) _rtc8564_ctrl2(c) |
54 | 55 | ||
55 | #define BCD_TO_BIN(val) (((val)&15) + ((val)>>4)*10) | ||
56 | #define BIN_TO_BCD(val) ((((val)/10)<<4) + (val)%10) | ||
57 | |||
58 | static int debug;; | 56 | static int debug;; |
59 | module_param(debug, int, S_IRUGO | S_IWUSR); | 57 | module_param(debug, int, S_IRUGO | S_IWUSR); |
60 | 58 | ||
@@ -224,16 +222,16 @@ static int rtc8564_get_datetime(struct i2c_client *client, struct rtc_tm *dt) | |||
224 | return ret; | 222 | return ret; |
225 | 223 | ||
226 | /* century stored in minute alarm reg */ | 224 | /* century stored in minute alarm reg */ |
227 | dt->year = BCD_TO_BIN(buf[RTC8564_REG_YEAR]); | 225 | dt->year = BCD2BIN(buf[RTC8564_REG_YEAR]); |
228 | dt->year += 100 * BCD_TO_BIN(buf[RTC8564_REG_AL_MIN] & 0x3f); | 226 | dt->year += 100 * BCD2BIN(buf[RTC8564_REG_AL_MIN] & 0x3f); |
229 | dt->mday = BCD_TO_BIN(buf[RTC8564_REG_DAY] & 0x3f); | 227 | dt->mday = BCD2BIN(buf[RTC8564_REG_DAY] & 0x3f); |
230 | dt->wday = BCD_TO_BIN(buf[RTC8564_REG_WDAY] & 7); | 228 | dt->wday = BCD2BIN(buf[RTC8564_REG_WDAY] & 7); |
231 | dt->mon = BCD_TO_BIN(buf[RTC8564_REG_MON_CENT] & 0x1f); | 229 | dt->mon = BCD2BIN(buf[RTC8564_REG_MON_CENT] & 0x1f); |
232 | 230 | ||
233 | dt->secs = BCD_TO_BIN(buf[RTC8564_REG_SEC] & 0x7f); | 231 | dt->secs = BCD2BIN(buf[RTC8564_REG_SEC] & 0x7f); |
234 | dt->vl = (buf[RTC8564_REG_SEC] & 0x80) == 0x80; | 232 | dt->vl = (buf[RTC8564_REG_SEC] & 0x80) == 0x80; |
235 | dt->mins = BCD_TO_BIN(buf[RTC8564_REG_MIN] & 0x7f); | 233 | dt->mins = BCD2BIN(buf[RTC8564_REG_MIN] & 0x7f); |
236 | dt->hours = BCD_TO_BIN(buf[RTC8564_REG_HR] & 0x3f); | 234 | dt->hours = BCD2BIN(buf[RTC8564_REG_HR] & 0x3f); |
237 | 235 | ||
238 | _DBGRTCTM(2, *dt); | 236 | _DBGRTCTM(2, *dt); |
239 | 237 | ||
@@ -255,18 +253,18 @@ rtc8564_set_datetime(struct i2c_client *client, struct rtc_tm *dt, int datetoo) | |||
255 | 253 | ||
256 | buf[RTC8564_REG_CTRL1] = CTRL1(client) | RTC8564_CTRL1_STOP; | 254 | buf[RTC8564_REG_CTRL1] = CTRL1(client) | RTC8564_CTRL1_STOP; |
257 | buf[RTC8564_REG_CTRL2] = CTRL2(client); | 255 | buf[RTC8564_REG_CTRL2] = CTRL2(client); |
258 | buf[RTC8564_REG_SEC] = BIN_TO_BCD(dt->secs); | 256 | buf[RTC8564_REG_SEC] = BIN2BCD(dt->secs); |
259 | buf[RTC8564_REG_MIN] = BIN_TO_BCD(dt->mins); | 257 | buf[RTC8564_REG_MIN] = BIN2BCD(dt->mins); |
260 | buf[RTC8564_REG_HR] = BIN_TO_BCD(dt->hours); | 258 | buf[RTC8564_REG_HR] = BIN2BCD(dt->hours); |
261 | 259 | ||
262 | if (datetoo) { | 260 | if (datetoo) { |
263 | len += 5; | 261 | len += 5; |
264 | buf[RTC8564_REG_DAY] = BIN_TO_BCD(dt->mday); | 262 | buf[RTC8564_REG_DAY] = BIN2BCD(dt->mday); |
265 | buf[RTC8564_REG_WDAY] = BIN_TO_BCD(dt->wday); | 263 | buf[RTC8564_REG_WDAY] = BIN2BCD(dt->wday); |
266 | buf[RTC8564_REG_MON_CENT] = BIN_TO_BCD(dt->mon) & 0x1f; | 264 | buf[RTC8564_REG_MON_CENT] = BIN2BCD(dt->mon) & 0x1f; |
267 | /* century stored in minute alarm reg */ | 265 | /* century stored in minute alarm reg */ |
268 | buf[RTC8564_REG_YEAR] = BIN_TO_BCD(dt->year % 100); | 266 | buf[RTC8564_REG_YEAR] = BIN2BCD(dt->year % 100); |
269 | buf[RTC8564_REG_AL_MIN] = BIN_TO_BCD(dt->year / 100); | 267 | buf[RTC8564_REG_AL_MIN] = BIN2BCD(dt->year / 100); |
270 | } | 268 | } |
271 | 269 | ||
272 | ret = rtc8564_write(client, 0, buf, len); | 270 | ret = rtc8564_write(client, 0, buf, len); |