29 static u8 bq4802_read_io(struct bq4802 *p, int off)  in bq4802_read_io()  argument
31 	return inb(p->ioport + off);  in bq4802_read_io()
34 static void bq4802_write_io(struct bq4802 *p, int off, u8 val)  in bq4802_write_io()  argument
36 	outb(val, p->ioport + off);  in bq4802_write_io()
39 static u8 bq4802_read_mem(struct bq4802 *p, int off)  in bq4802_read_mem()  argument
41 	return readb(p->regs + off);  in bq4802_read_mem()
44 static void bq4802_write_mem(struct bq4802 *p, int off, u8 val)  in bq4802_write_mem()  argument
46 	writeb(val, p->regs + off);  in bq4802_write_mem()
52 	struct bq4802 *p = platform_get_drvdata(pdev);  in bq4802_read_time()  local
57 	spin_lock_irqsave(&p->lock, flags);  in bq4802_read_time()
59 	val = p->read(p, 0x0e);  in bq4802_read_time()
60 	p->write(p, 0xe, val | 0x08);  in bq4802_read_time()
62 	tm->tm_sec = p->read(p, 0x00);  in bq4802_read_time()
63 	tm->tm_min = p->read(p, 0x02);  in bq4802_read_time()
64 	tm->tm_hour = p->read(p, 0x04);  in bq4802_read_time()
65 	tm->tm_mday = p->read(p, 0x06);  in bq4802_read_time()
66 	tm->tm_mon = p->read(p, 0x09);  in bq4802_read_time()
67 	tm->tm_year = p->read(p, 0x0a);  in bq4802_read_time()
68 	tm->tm_wday = p->read(p, 0x08);  in bq4802_read_time()
69 	century = p->read(p, 0x0f);  in bq4802_read_time()
71 	p->write(p, 0x0e, val);  in bq4802_read_time()
73 	spin_unlock_irqrestore(&p->lock, flags);  in bq4802_read_time()
95 	struct bq4802 *p = platform_get_drvdata(pdev);  in bq4802_set_time()  local
118 	spin_lock_irqsave(&p->lock, flags);  in bq4802_set_time()
120 	val = p->read(p, 0x0e);  in bq4802_set_time()
121 	p->write(p, 0x0e, val | 0x08);  in bq4802_set_time()
123 	p->write(p, 0x00, sec);  in bq4802_set_time()
124 	p->write(p, 0x02, min);  in bq4802_set_time()
125 	p->write(p, 0x04, hrs);  in bq4802_set_time()
126 	p->write(p, 0x06, day);  in bq4802_set_time()
127 	p->write(p, 0x09, mon);  in bq4802_set_time()
128 	p->write(p, 0x0a, yrs);  in bq4802_set_time()
129 	p->write(p, 0x0f, century);  in bq4802_set_time()
131 	p->write(p, 0x0e, val);  in bq4802_set_time()
133 	spin_unlock_irqrestore(&p->lock, flags);  in bq4802_set_time()
145 	struct bq4802 *p = devm_kzalloc(&pdev->dev, sizeof(*p), GFP_KERNEL);  in bq4802_probe()  local
148 	if (!p)  in bq4802_probe()
151 	spin_lock_init(&p->lock);  in bq4802_probe()
153 	p->r = platform_get_resource(pdev, IORESOURCE_MEM, 0);  in bq4802_probe()
154 	if (!p->r) {  in bq4802_probe()
155 		p->r = platform_get_resource(pdev, IORESOURCE_IO, 0);  in bq4802_probe()
157 		if (!p->r)  in bq4802_probe()
160 	if (p->r->flags & IORESOURCE_IO) {  in bq4802_probe()
161 		p->ioport = p->r->start;  in bq4802_probe()
162 		p->read = bq4802_read_io;  in bq4802_probe()
163 		p->write = bq4802_write_io;  in bq4802_probe()
164 	} else if (p->r->flags & IORESOURCE_MEM) {  in bq4802_probe()
165 		p->regs = devm_ioremap(&pdev->dev, p->r->start,  in bq4802_probe()
166 					resource_size(p->r));  in bq4802_probe()
167 		p->read = bq4802_read_mem;  in bq4802_probe()
168 		p->write = bq4802_write_mem;  in bq4802_probe()
174 	platform_set_drvdata(pdev, p);  in bq4802_probe()
176 	p->rtc = devm_rtc_device_register(&pdev->dev, "bq4802",  in bq4802_probe()
178 	if (IS_ERR(p->rtc)) {  in bq4802_probe()
179 		err = PTR_ERR(p->rtc);  in bq4802_probe()