OpenWrt – Blame information for rev 1
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Rev | Author | Line No. | Line |
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1 | office | 1 | --- a/drivers/rtc/Kconfig |
2 | +++ b/drivers/rtc/Kconfig |
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3 | @@ -979,6 +979,15 @@ config RTC_DRV_NUC900 |
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4 | If you say yes here you get support for the RTC subsystem of the |
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5 | NUC910/NUC920 used in embedded systems. |
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6 | |||
7 | +config RTC_DRV_RTC7301 |
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8 | + tristate "Epson RTC-7301 SF/DG" |
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9 | + help |
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10 | + If you say Y here you will get support for the |
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11 | + Epson RTC-7301 SF/DG RTC chips. |
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12 | + |
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13 | + This driver can also be built as a module. If so, the module |
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14 | + will be called rtc-7301. |
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15 | + |
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16 | comment "on-CPU RTC drivers" |
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17 | |||
18 | config RTC_DRV_DAVINCI |
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19 | --- a/drivers/rtc/Makefile |
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20 | +++ b/drivers/rtc/Makefile |
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21 | @@ -115,6 +115,7 @@ obj-$(CONFIG_RTC_DRV_RP5C01) += rtc-rp5c |
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22 | obj-$(CONFIG_RTC_DRV_RS5C313) += rtc-rs5c313.o |
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23 | obj-$(CONFIG_RTC_DRV_RS5C348) += rtc-rs5c348.o |
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24 | obj-$(CONFIG_RTC_DRV_RS5C372) += rtc-rs5c372.o |
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25 | +obj-$(CONFIG_RTC_DRV_RTC7301) += rtc-rtc7301.o |
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26 | obj-$(CONFIG_RTC_DRV_RV3029C2) += rtc-rv3029c2.o |
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27 | obj-$(CONFIG_RTC_DRV_RX4581) += rtc-rx4581.o |
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28 | obj-$(CONFIG_RTC_DRV_RX8025) += rtc-rx8025.o |
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29 | --- /dev/null |
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30 | +++ b/drivers/rtc/rtc-rtc7301.c |
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31 | @@ -0,0 +1,219 @@ |
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32 | +/* |
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33 | + * Driver for Epson RTC-7301SF/DG |
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34 | + * |
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35 | + * Copyright (C) 2009 Jose Vasconcellos |
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36 | + * |
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37 | + * This program is free software; you can redistribute it and/or modify |
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38 | + * it under the terms of the GNU General Public License version 2 as |
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39 | + * published by the Free Software Foundation. |
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40 | + */ |
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41 | + |
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42 | +#include <linux/module.h> |
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43 | +#include <linux/rtc.h> |
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44 | +#include <linux/platform_device.h> |
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45 | +#include <linux/io.h> |
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46 | +#include <linux/delay.h> |
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47 | +#include <linux/bcd.h> |
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48 | + |
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49 | +#define RTC_NAME "rtc7301" |
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50 | +#define RTC_VERSION "0.1" |
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51 | + |
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52 | +/* Epson RTC-7301 register addresses */ |
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53 | +#define RTC7301_SEC 0x00 |
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54 | +#define RTC7301_SEC10 0x01 |
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55 | +#define RTC7301_MIN 0x02 |
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56 | +#define RTC7301_MIN10 0x03 |
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57 | +#define RTC7301_HOUR 0x04 |
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58 | +#define RTC7301_HOUR10 0x05 |
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59 | +#define RTC7301_WEEKDAY 0x06 |
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60 | +#define RTC7301_DAY 0x07 |
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61 | +#define RTC7301_DAY10 0x08 |
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62 | +#define RTC7301_MON 0x09 |
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63 | +#define RTC7301_MON10 0x0A |
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64 | +#define RTC7301_YEAR 0x0B |
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65 | +#define RTC7301_YEAR10 0x0C |
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66 | +#define RTC7301_YEAR100 0x0D |
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67 | +#define RTC7301_YEAR1000 0x0E |
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68 | +#define RTC7301_CTRLREG 0x0F |
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69 | + |
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70 | +static uint8_t __iomem *rtc7301_base; |
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71 | + |
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72 | +#define read_reg(offset) (readb(rtc7301_base + offset) & 0xf) |
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73 | +#define write_reg(offset, data) writeb(data, rtc7301_base + (offset)) |
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74 | + |
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75 | +#define rtc7301_isbusy() (read_reg(RTC7301_CTRLREG) & 1) |
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76 | + |
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77 | +static void rtc7301_init_settings(void) |
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78 | +{ |
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79 | + int i; |
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80 | + |
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81 | + write_reg(RTC7301_CTRLREG, 2); |
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82 | + write_reg(RTC7301_YEAR1000, 2); |
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83 | + udelay(122); |
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84 | + |
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85 | + /* bank 1 */ |
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86 | + write_reg(RTC7301_CTRLREG, 6); |
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87 | + for (i=0; i<15; i++) |
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88 | + write_reg(i, 0); |
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89 | + |
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90 | + /* bank 2 */ |
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91 | + write_reg(RTC7301_CTRLREG, 14); |
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92 | + for (i=0; i<15; i++) |
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93 | + write_reg(i, 0); |
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94 | + write_reg(RTC7301_CTRLREG, 0); |
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95 | +} |
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96 | + |
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97 | +static int rtc7301_get_datetime(struct device *dev, struct rtc_time *dt) |
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98 | +{ |
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99 | + int cnt; |
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100 | + uint8_t buf[16]; |
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101 | + |
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102 | + cnt = 0; |
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103 | + while (rtc7301_isbusy()) { |
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104 | + udelay(244); |
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105 | + if (cnt++ > 100) { |
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106 | + dev_err(dev, "%s: timeout error %x\n", __func__, rtc7301_base[RTC7301_CTRLREG]); |
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107 | + return -EIO; |
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108 | + } |
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109 | + } |
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110 | + |
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111 | + for (cnt=0; cnt<16; cnt++) |
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112 | + buf[cnt] = read_reg(cnt); |
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113 | + |
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114 | + if (buf[RTC7301_SEC10] & 8) { |
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115 | + dev_err(dev, "%s: RTC not set\n", __func__); |
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116 | + return -EINVAL; |
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117 | + } |
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118 | + |
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119 | + memset(dt, 0, sizeof(*dt)); |
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120 | + |
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121 | + dt->tm_sec = buf[RTC7301_SEC] + buf[RTC7301_SEC10]*10; |
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122 | + dt->tm_min = buf[RTC7301_MIN] + buf[RTC7301_MIN10]*10; |
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123 | + dt->tm_hour = buf[RTC7301_HOUR] + buf[RTC7301_HOUR10]*10; |
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124 | + |
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125 | + dt->tm_mday = buf[RTC7301_DAY] + buf[RTC7301_DAY10]*10; |
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126 | + dt->tm_mon = buf[RTC7301_MON] + buf[RTC7301_MON10]*10 - 1; |
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127 | + dt->tm_year = buf[RTC7301_YEAR] + buf[RTC7301_YEAR10]*10 + |
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128 | + buf[RTC7301_YEAR100]*100 + |
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129 | + ((buf[RTC7301_YEAR1000] & 3)*1000) - 1900; |
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130 | + |
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131 | + /* the rtc device may contain illegal values on power up |
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132 | + * according to the data sheet. make sure they are valid. |
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133 | + */ |
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134 | + |
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135 | + return rtc_valid_tm(dt); |
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136 | +} |
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137 | + |
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138 | +static int rtc7301_set_datetime(struct device *dev, struct rtc_time *dt) |
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139 | +{ |
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140 | + int data; |
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141 | + |
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142 | + data = dt->tm_year + 1900; |
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143 | + if (data >= 2100 || data < 1900) |
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144 | + return -EINVAL; |
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145 | + |
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146 | + write_reg(RTC7301_CTRLREG, 2); |
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147 | + udelay(122); |
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148 | + |
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149 | + data = bin2bcd(dt->tm_sec); |
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150 | + write_reg(RTC7301_SEC, data); |
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151 | + write_reg(RTC7301_SEC10, (data >> 4)); |
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152 | + |
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153 | + data = bin2bcd(dt->tm_min); |
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154 | + write_reg(RTC7301_MIN, data ); |
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155 | + write_reg(RTC7301_MIN10, (data >> 4)); |
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156 | + |
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157 | + data = bin2bcd(dt->tm_hour); |
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158 | + write_reg(RTC7301_HOUR, data); |
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159 | + write_reg(RTC7301_HOUR10, (data >> 4)); |
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160 | + |
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161 | + data = bin2bcd(dt->tm_mday); |
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162 | + write_reg(RTC7301_DAY, data); |
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163 | + write_reg(RTC7301_DAY10, (data>> 4)); |
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164 | + |
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165 | + data = bin2bcd(dt->tm_mon + 1); |
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166 | + write_reg(RTC7301_MON, data); |
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167 | + write_reg(RTC7301_MON10, (data >> 4)); |
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168 | + |
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169 | + data = bin2bcd(dt->tm_year % 100); |
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170 | + write_reg(RTC7301_YEAR, data); |
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171 | + write_reg(RTC7301_YEAR10, (data >> 4)); |
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172 | + data = bin2bcd((1900 + dt->tm_year) / 100); |
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173 | + write_reg(RTC7301_YEAR100, data); |
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174 | + |
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175 | + data = bin2bcd(dt->tm_wday); |
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176 | + write_reg(RTC7301_WEEKDAY, data); |
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177 | + |
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178 | + write_reg(RTC7301_CTRLREG, 0); |
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179 | + |
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180 | + return 0; |
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181 | +} |
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182 | + |
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183 | +static const struct rtc_class_ops rtc7301_rtc_ops = { |
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184 | + .read_time = rtc7301_get_datetime, |
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185 | + .set_time = rtc7301_set_datetime, |
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186 | +}; |
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187 | + |
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188 | +static int rtc7301_probe(struct platform_device *pdev) |
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189 | +{ |
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190 | + struct rtc_device *rtc; |
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191 | + struct resource *res; |
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192 | + |
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193 | + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
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194 | + if (!res) |
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195 | + return -ENOENT; |
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196 | + |
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197 | + rtc7301_base = ioremap_nocache(res->start, 0x1000 /*res->end - res->start + 1*/); |
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198 | + if (!rtc7301_base) |
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199 | + return -EINVAL; |
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200 | + |
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201 | + rtc = rtc_device_register(RTC_NAME, &pdev->dev, |
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202 | + &rtc7301_rtc_ops, THIS_MODULE); |
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203 | + if (IS_ERR(rtc)) { |
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204 | + iounmap(rtc7301_base); |
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205 | + return PTR_ERR(rtc); |
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206 | + } |
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207 | + |
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208 | + platform_set_drvdata(pdev, rtc); |
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209 | + |
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210 | + rtc7301_init_settings(); |
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211 | + return 0; |
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212 | +} |
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213 | + |
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214 | +static int rtc7301_remove(struct platform_device *pdev) |
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215 | +{ |
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216 | + struct rtc_device *rtc = platform_get_drvdata(pdev); |
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217 | + |
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218 | + if (rtc) |
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219 | + rtc_device_unregister(rtc); |
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220 | + if (rtc7301_base) |
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221 | + iounmap(rtc7301_base); |
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222 | + return 0; |
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223 | +} |
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224 | + |
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225 | +static struct platform_driver rtc7301_driver = { |
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226 | + .driver = { |
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227 | + .name = RTC_NAME, |
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228 | + .owner = THIS_MODULE, |
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229 | + }, |
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230 | + .probe = rtc7301_probe, |
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231 | + .remove = rtc7301_remove, |
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232 | +}; |
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233 | + |
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234 | +static __init int rtc7301_init(void) |
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235 | +{ |
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236 | + return platform_driver_register(&rtc7301_driver); |
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237 | +} |
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238 | +module_init(rtc7301_init); |
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239 | + |
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240 | +static __exit void rtc7301_exit(void) |
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241 | +{ |
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242 | + platform_driver_unregister(&rtc7301_driver); |
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243 | +} |
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244 | +module_exit(rtc7301_exit); |
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245 | + |
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246 | +MODULE_DESCRIPTION("Epson 7301 RTC driver"); |
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247 | +MODULE_AUTHOR("Jose Vasconcellos <jvasco@verizon.net>"); |
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248 | +MODULE_LICENSE("GPL"); |
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249 | +MODULE_ALIAS("platform:" RTC_NAME); |
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250 | +MODULE_VERSION(RTC_VERSION); |