target/linux/s3c24xx/patches-2.6.24/1186-fix-pcf50633-rtc-i2c-bulk-autoincrement-simplify.pat.patch

   1 From d22227eec7efd4b2f40e51ea3c3bc025299efc93 Mon Sep 17 00:00:00 2001
   2 From: Andy Green <andy@openmoko.com>
   3 Date: Wed, 2 Jul 2008 22:40:04 +0100
   4 Subject: [PATCH] fix-pcf50633-rtc-i2c-bulk-autoincrement-simplify.patch
   5
   6 More pcf50633 major time saving by using i2c bulk autoincrement.  Code
   7 reduction too by using array for time elements.
   8
   9 Signed-off-by: Andy Green <andy@openmoko.com>
  10 ---
  11  drivers/i2c/chips/pcf50633.c |  134 ++++++++++++++++++++++++------------------
  12  1 files changed, 77 insertions(+), 57 deletions(-)
  13
  14 diff --git a/drivers/i2c/chips/pcf50633.c b/drivers/i2c/chips/pcf50633.c
  15 index 33e2eaf..1f88c32 100644
  16 --- a/drivers/i2c/chips/pcf50633.c
  17 +++ b/drivers/i2c/chips/pcf50633.c
  18 @@ -1505,37 +1505,42 @@ static void pcf50633_get_power_status(struct apm_power_info *info)
  19  /***********************************************************************
  20   * RTC
  21   ***********************************************************************/
  22 +enum pcf50633_time_indexes {
  23 +       PCF50633_TI_SEC = 0,
  24 +       PCF50633_TI_MIN,
  25 +       PCF50633_TI_HOUR,
  26 +       PCF50633_TI_WKDAY,
  27 +       PCF50633_TI_DAY,
  28 +       PCF50633_TI_MONTH,
  29 +       PCF50633_TI_YEAR,
  30 +       PCF50633_TI_EXTENT /* always last */
  31 +};
  32 +
  33
  34  struct pcf50633_time {
  35 -       u_int8_t sec;
  36 -       u_int8_t min;
  37 -       u_int8_t hour;
  38 -       u_int8_t wkday;
  39 -       u_int8_t day;
  40 -       u_int8_t month;
  41 -       u_int8_t year;
  42 +       u_int8_t time[PCF50633_TI_EXTENT];
  43  };
  44
  45  static void pcf2rtc_time(struct rtc_time *rtc, struct pcf50633_time *pcf)
  46  {
  47 -       rtc->tm_sec = BCD2BIN(pcf->sec);
  48 -       rtc->tm_min = BCD2BIN(pcf->min);
  49 -       rtc->tm_hour = BCD2BIN(pcf->hour);
  50 -       rtc->tm_wday = BCD2BIN(pcf->wkday);
  51 -       rtc->tm_mday = BCD2BIN(pcf->day);
  52 -       rtc->tm_mon = BCD2BIN(pcf->month);
  53 -       rtc->tm_year = BCD2BIN(pcf->year) + 100;
  54 +       rtc->tm_sec = BCD2BIN(pcf->time[PCF50633_TI_SEC]);
  55 +       rtc->tm_min = BCD2BIN(pcf->time[PCF50633_TI_MIN]);
  56 +       rtc->tm_hour = BCD2BIN(pcf->time[PCF50633_TI_HOUR]);
  57 +       rtc->tm_wday = BCD2BIN(pcf->time[PCF50633_TI_WKDAY]);
  58 +       rtc->tm_mday = BCD2BIN(pcf->time[PCF50633_TI_DAY]);
  59 +       rtc->tm_mon = BCD2BIN(pcf->time[PCF50633_TI_MONTH]);
  60 +       rtc->tm_year = BCD2BIN(pcf->time[PCF50633_TI_YEAR]) + 100;
  61  }
  62
  63  static void rtc2pcf_time(struct pcf50633_time *pcf, struct rtc_time *rtc)
  64  {
  65 -       pcf->sec = BIN2BCD(rtc->tm_sec);
  66 -       pcf->min = BIN2BCD(rtc->tm_min);
  67 -       pcf->hour = BIN2BCD(rtc->tm_hour);
  68 -       pcf->wkday = BIN2BCD(rtc->tm_wday);
  69 -       pcf->day = BIN2BCD(rtc->tm_mday);
  70 -       pcf->month = BIN2BCD(rtc->tm_mon);
  71 -       pcf->year = BIN2BCD(rtc->tm_year - 100);
  72 +       pcf->time[PCF50633_TI_SEC] = BIN2BCD(rtc->tm_sec);
  73 +       pcf->time[PCF50633_TI_MIN] = BIN2BCD(rtc->tm_min);
  74 +       pcf->time[PCF50633_TI_HOUR] = BIN2BCD(rtc->tm_hour);
  75 +       pcf->time[PCF50633_TI_WKDAY] = BIN2BCD(rtc->tm_wday);
  76 +       pcf->time[PCF50633_TI_DAY] = BIN2BCD(rtc->tm_mday);
  77 +       pcf->time[PCF50633_TI_MONTH] = BIN2BCD(rtc->tm_mon);
  78 +       pcf->time[PCF50633_TI_YEAR] = BIN2BCD(rtc->tm_year - 100);
  79  }
  80
  81  static int pcf50633_rtc_ioctl(struct device *dev, unsigned int cmd,
  82 @@ -1574,24 +1579,30 @@ static int pcf50633_rtc_read_time(struct device *dev, struct rtc_time *tm)
  83         struct i2c_client *client = to_i2c_client(dev);
  84         struct pcf50633_data *pcf = i2c_get_clientdata(client);
  85         struct pcf50633_time pcf_tm;
  86 +       int ret;
  87
  88         mutex_lock(&pcf->lock);
  89 -       pcf_tm.sec = __reg_read(pcf, PCF50633_REG_RTCSC);
  90 -       pcf_tm.min = __reg_read(pcf, PCF50633_REG_RTCMN);
  91 -       pcf_tm.hour = __reg_read(pcf, PCF50633_REG_RTCHR);
  92 -       pcf_tm.wkday = __reg_read(pcf, PCF50633_REG_RTCWD);
  93 -       pcf_tm.day = __reg_read(pcf, PCF50633_REG_RTCDT);
  94 -       pcf_tm.month = __reg_read(pcf, PCF50633_REG_RTCMT);
  95 -       pcf_tm.year = __reg_read(pcf, PCF50633_REG_RTCYR);
  96 +
  97 +       ret = i2c_smbus_read_i2c_block_data(&pcf->client,
  98 +                                           PCF50633_REG_RTCSC,
  99 +                                           PCF50633_TI_EXTENT,
 100 +                                           &pcf_tm.time[0]);
 101 +       if (ret != PCF50633_TI_EXTENT)
 102 +               dev_err(dev, "Failed to read time :-(\n");
 103 +
 104         mutex_unlock(&pcf->lock);
 105
 106 -       DEBUGP("PCF_TIME: %02x.%02x.%02x %02x:%02x:%02x\n",
 107 -               pcf_tm.day, pcf_tm.month, pcf_tm.year,
 108 -               pcf_tm.hour, pcf_tm.min, pcf_tm.sec);
 109 +       dev_info(dev, "PCF_TIME: %02x.%02x.%02x %02x:%02x:%02x\n",
 110 +               pcf_tm.time[PCF50633_TI_DAY],
 111 +               pcf_tm.time[PCF50633_TI_MONTH],
 112 +               pcf_tm.time[PCF50633_TI_YEAR],
 113 +               pcf_tm.time[PCF50633_TI_HOUR],
 114 +               pcf_tm.time[PCF50633_TI_MIN],
 115 +               pcf_tm.time[PCF50633_TI_SEC]);
 116
 117         pcf2rtc_time(tm, &pcf_tm);
 118
 119 -       DEBUGP("RTC_TIME: %u.%u.%u %u:%u:%u\n",
 120 +       dev_info(dev, "RTC_TIME: %u.%u.%u %u:%u:%u\n",
 121                 tm->tm_mday, tm->tm_mon, tm->tm_year,
 122                 tm->tm_hour, tm->tm_min, tm->tm_sec);
 123
 124 @@ -1603,24 +1614,30 @@ static int pcf50633_rtc_set_time(struct device *dev, struct rtc_time *tm)
 125         struct i2c_client *client = to_i2c_client(dev);
 126         struct pcf50633_data *pcf = i2c_get_clientdata(client);
 127         struct pcf50633_time pcf_tm;
 128 +       int ret;
 129
 130 -       DEBUGP("RTC_TIME: %u.%u.%u %u:%u:%u\n",
 131 +       dev_info(dev, "RTC_TIME: %u.%u.%u %u:%u:%u\n",
 132                 tm->tm_mday, tm->tm_mon, tm->tm_year,
 133                 tm->tm_hour, tm->tm_min, tm->tm_sec);
 134         rtc2pcf_time(&pcf_tm, tm);
 135 -       DEBUGP("PCF_TIME: %02x.%02x.%02x %02x:%02x:%02x\n",
 136 -               pcf_tm.day, pcf_tm.month, pcf_tm.year,
 137 -               pcf_tm.hour, pcf_tm.min, pcf_tm.sec);
 138 +       dev_info(dev, "PCF_TIME: %02x.%02x.%02x %02x:%02x:%02x\n",
 139 +               pcf_tm.time[PCF50633_TI_DAY],
 140 +               pcf_tm.time[PCF50633_TI_MONTH],
 141 +               pcf_tm.time[PCF50633_TI_YEAR],
 142 +               pcf_tm.time[PCF50633_TI_HOUR],
 143 +               pcf_tm.time[PCF50633_TI_MIN],
 144 +               pcf_tm.time[PCF50633_TI_SEC]);
 145
 146         mutex_lock(&pcf->lock);
 147         /* FIXME: disable second interrupt */
 148 -       __reg_write(pcf, PCF50633_REG_RTCSC, pcf_tm.sec);
 149 -       __reg_write(pcf, PCF50633_REG_RTCMN, pcf_tm.min);
 150 -       __reg_write(pcf, PCF50633_REG_RTCHR, pcf_tm.hour);
 151 -       __reg_write(pcf, PCF50633_REG_RTCWD, pcf_tm.wkday);
 152 -       __reg_write(pcf, PCF50633_REG_RTCDT, pcf_tm.day);
 153 -       __reg_write(pcf, PCF50633_REG_RTCMT, pcf_tm.month);
 154 -       __reg_write(pcf, PCF50633_REG_RTCYR, pcf_tm.year);
 155 +
 156 +       ret = i2c_smbus_write_i2c_block_data(&pcf->client,
 157 +                                            PCF50633_REG_RTCSC,
 158 +                                            PCF50633_TI_EXTENT,
 159 +                                            &pcf_tm.time[0]);
 160 +       if (ret)
 161 +               dev_err(dev, "Failed to set time %d\n", ret);
 162 +
 163         /* FIXME: re-enable second interrupt */
 164         mutex_unlock(&pcf->lock);
 165
 166 @@ -1632,17 +1649,20 @@ static int pcf50633_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm)
 167         struct i2c_client *client = to_i2c_client(dev);
 168         struct pcf50633_data *pcf = i2c_get_clientdata(client);
 169         struct pcf50633_time pcf_tm;
 170 +       int ret;
 171
 172         mutex_lock(&pcf->lock);
 173 +
 174         alrm->enabled =
 175              __reg_read(pcf, PCF50633_REG_INT1M) & PCF50633_INT1_ALARM ? 0 : 1;
 176 -       pcf_tm.sec = __reg_read(pcf, PCF50633_REG_RTCSCA);
 177 -       pcf_tm.min = __reg_read(pcf, PCF50633_REG_RTCMNA);
 178 -       pcf_tm.hour = __reg_read(pcf, PCF50633_REG_RTCHRA);
 179 -       pcf_tm.wkday = __reg_read(pcf, PCF50633_REG_RTCWDA);
 180 -       pcf_tm.day = __reg_read(pcf, PCF50633_REG_RTCDTA);
 181 -       pcf_tm.month = __reg_read(pcf, PCF50633_REG_RTCMTA);
 182 -       pcf_tm.year = __reg_read(pcf, PCF50633_REG_RTCYRA);
 183 +
 184 +       ret = i2c_smbus_read_i2c_block_data(&pcf->client,
 185 +                                           PCF50633_REG_RTCSCA,
 186 +                                           PCF50633_TI_EXTENT,
 187 +                                           &pcf_tm.time[0]);
 188 +       if (ret != PCF50633_TI_EXTENT)
 189 +               dev_err(dev, "Failed to read Alarm time :-(\n");
 190 +
 191         mutex_unlock(&pcf->lock);
 192
 193         pcf2rtc_time(&alrm->time, &pcf_tm);
 194 @@ -1656,6 +1676,7 @@ static int pcf50633_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm)
 195         struct pcf50633_data *pcf = i2c_get_clientdata(client);
 196         struct pcf50633_time pcf_tm;
 197         u_int8_t irqmask;
 198 +       int ret;
 199
 200         rtc2pcf_time(&pcf_tm, &alrm->time);
 201
 202 @@ -1666,13 +1687,12 @@ static int pcf50633_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm)
 203         irqmask |= PCF50633_INT1_ALARM;
 204         __reg_write(pcf, PCF50633_REG_INT1M, irqmask);
 205
 206 -       __reg_write(pcf, PCF50633_REG_RTCSCA, pcf_tm.sec);
 207 -       __reg_write(pcf, PCF50633_REG_RTCMNA, pcf_tm.min);
 208 -       __reg_write(pcf, PCF50633_REG_RTCHRA, pcf_tm.hour);
 209 -       __reg_write(pcf, PCF50633_REG_RTCWDA, pcf_tm.wkday);
 210 -       __reg_write(pcf, PCF50633_REG_RTCDTA, pcf_tm.day);
 211 -       __reg_write(pcf, PCF50633_REG_RTCMTA, pcf_tm.month);
 212 -       __reg_write(pcf, PCF50633_REG_RTCYRA, pcf_tm.year);
 213 +       ret = i2c_smbus_write_i2c_block_data(&pcf->client,
 214 +                                            PCF50633_REG_RTCSCA,
 215 +                                            PCF50633_TI_EXTENT,
 216 +                                            &pcf_tm.time[0]);
 217 +       if (ret)
 218 +               dev_err(dev, "Failed to write alarm time :-( %d\n", ret);
 219
 220         if (alrm->enabled) {
 221                 /* (re-)enaable alarm interrupt */
 222 --
 223 1.5.6.5
 224