47 static unsigned char m48t86_readb(struct device *dev, unsigned long addr)  in m48t86_readb()  argument
49 	struct m48t86_rtc_info *info = dev_get_drvdata(dev);  in m48t86_readb()
58 static void m48t86_writeb(struct device *dev,  in m48t86_writeb()  argument
61 	struct m48t86_rtc_info *info = dev_get_drvdata(dev);  in m48t86_writeb()
67 static int m48t86_rtc_read_time(struct device *dev, struct rtc_time *tm)  in m48t86_rtc_read_time()  argument
71 	reg = m48t86_readb(dev, M48T86_B);  in m48t86_rtc_read_time()
75 		tm->tm_sec	= m48t86_readb(dev, M48T86_SEC);  in m48t86_rtc_read_time()
76 		tm->tm_min	= m48t86_readb(dev, M48T86_MIN);  in m48t86_rtc_read_time()
77 		tm->tm_hour	= m48t86_readb(dev, M48T86_HOUR) & 0x3f;  in m48t86_rtc_read_time()
78 		tm->tm_mday	= m48t86_readb(dev, M48T86_DOM);  in m48t86_rtc_read_time()
80 		tm->tm_mon	= m48t86_readb(dev, M48T86_MONTH) - 1;  in m48t86_rtc_read_time()
81 		tm->tm_year	= m48t86_readb(dev, M48T86_YEAR) + 100;  in m48t86_rtc_read_time()
82 		tm->tm_wday	= m48t86_readb(dev, M48T86_DOW);  in m48t86_rtc_read_time()
85 		tm->tm_sec	= bcd2bin(m48t86_readb(dev, M48T86_SEC));  in m48t86_rtc_read_time()
86 		tm->tm_min	= bcd2bin(m48t86_readb(dev, M48T86_MIN));  in m48t86_rtc_read_time()
87 		tm->tm_hour	= bcd2bin(m48t86_readb(dev, M48T86_HOUR) &  in m48t86_rtc_read_time()
89 		tm->tm_mday	= bcd2bin(m48t86_readb(dev, M48T86_DOM));  in m48t86_rtc_read_time()
91 		tm->tm_mon	= bcd2bin(m48t86_readb(dev, M48T86_MONTH)) - 1;  in m48t86_rtc_read_time()
92 		tm->tm_year	= bcd2bin(m48t86_readb(dev, M48T86_YEAR)) + 100;  in m48t86_rtc_read_time()
93 		tm->tm_wday	= bcd2bin(m48t86_readb(dev, M48T86_DOW));  in m48t86_rtc_read_time()
98 		if (m48t86_readb(dev, M48T86_HOUR) & 0x80)  in m48t86_rtc_read_time()
104 static int m48t86_rtc_set_time(struct device *dev, struct rtc_time *tm)  in m48t86_rtc_set_time()  argument
108 	reg = m48t86_readb(dev, M48T86_B);  in m48t86_rtc_set_time()
112 	m48t86_writeb(dev, reg, M48T86_B);  in m48t86_rtc_set_time()
116 		m48t86_writeb(dev, tm->tm_sec, M48T86_SEC);  in m48t86_rtc_set_time()
117 		m48t86_writeb(dev, tm->tm_min, M48T86_MIN);  in m48t86_rtc_set_time()
118 		m48t86_writeb(dev, tm->tm_hour, M48T86_HOUR);  in m48t86_rtc_set_time()
119 		m48t86_writeb(dev, tm->tm_mday, M48T86_DOM);  in m48t86_rtc_set_time()
120 		m48t86_writeb(dev, tm->tm_mon + 1, M48T86_MONTH);  in m48t86_rtc_set_time()
121 		m48t86_writeb(dev, tm->tm_year % 100, M48T86_YEAR);  in m48t86_rtc_set_time()
122 		m48t86_writeb(dev, tm->tm_wday, M48T86_DOW);  in m48t86_rtc_set_time()
125 		m48t86_writeb(dev, bin2bcd(tm->tm_sec), M48T86_SEC);  in m48t86_rtc_set_time()
126 		m48t86_writeb(dev, bin2bcd(tm->tm_min), M48T86_MIN);  in m48t86_rtc_set_time()
127 		m48t86_writeb(dev, bin2bcd(tm->tm_hour), M48T86_HOUR);  in m48t86_rtc_set_time()
128 		m48t86_writeb(dev, bin2bcd(tm->tm_mday), M48T86_DOM);  in m48t86_rtc_set_time()
129 		m48t86_writeb(dev, bin2bcd(tm->tm_mon + 1), M48T86_MONTH);  in m48t86_rtc_set_time()
130 		m48t86_writeb(dev, bin2bcd(tm->tm_year % 100), M48T86_YEAR);  in m48t86_rtc_set_time()
131 		m48t86_writeb(dev, bin2bcd(tm->tm_wday), M48T86_DOW);  in m48t86_rtc_set_time()
136 	m48t86_writeb(dev, reg, M48T86_B);  in m48t86_rtc_set_time()
141 static int m48t86_rtc_proc(struct device *dev, struct seq_file *seq)  in m48t86_rtc_proc()  argument
145 	reg = m48t86_readb(dev, M48T86_B);  in m48t86_rtc_proc()
150 	reg = m48t86_readb(dev, M48T86_D);  in m48t86_rtc_proc()
167 	struct device *dev = priv;  in m48t86_nvram_read()  local
171 		((u8 *)buf)[i] = m48t86_readb(dev, M48T86_NVRAM(off + i));  in m48t86_nvram_read()
179 	struct device *dev = priv;  in m48t86_nvram_write()  local
183 		m48t86_writeb(dev, ((u8 *)buf)[i], M48T86_NVRAM(off + i));  in m48t86_nvram_write()
201 	tmp0 = m48t86_readb(&pdev->dev, offset0);  in m48t86_verify_chip()
202 	tmp1 = m48t86_readb(&pdev->dev, offset1);  in m48t86_verify_chip()
204 	m48t86_writeb(&pdev->dev, 0x00, offset0);  in m48t86_verify_chip()
205 	m48t86_writeb(&pdev->dev, 0x55, offset1);  in m48t86_verify_chip()
206 	if (m48t86_readb(&pdev->dev, offset1) == 0x55) {  in m48t86_verify_chip()
207 		m48t86_writeb(&pdev->dev, 0xaa, offset1);  in m48t86_verify_chip()
208 		if (m48t86_readb(&pdev->dev, offset1) == 0xaa &&  in m48t86_verify_chip()
209 		    m48t86_readb(&pdev->dev, offset0) == 0x00) {  in m48t86_verify_chip()
210 			m48t86_writeb(&pdev->dev, tmp0, offset0);  in m48t86_verify_chip()
211 			m48t86_writeb(&pdev->dev, tmp1, offset1);  in m48t86_verify_chip()
231 		.priv = &pdev->dev,  in m48t86_rtc_probe()
234 	info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);  in m48t86_rtc_probe()
246 	dev_set_drvdata(&pdev->dev, info);  in m48t86_rtc_probe()
249 		dev_info(&pdev->dev, "RTC not present\n");  in m48t86_rtc_probe()
253 	info->rtc = devm_rtc_allocate_device(&pdev->dev);  in m48t86_rtc_probe()
266 	reg = m48t86_readb(&pdev->dev, M48T86_D);  in m48t86_rtc_probe()
267 	dev_info(&pdev->dev, "battery %s\n",  in m48t86_rtc_probe()