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-rw-r--r--drivers/rtc/rtc-m48t86.c153
1 files changed, 102 insertions, 51 deletions
diff --git a/drivers/rtc/rtc-m48t86.c b/drivers/rtc/rtc-m48t86.c
index 30648ea9e8e0..4dcdbd2a2408 100644
--- a/drivers/rtc/rtc-m48t86.c
+++ b/drivers/rtc/rtc-m48t86.c
@@ -18,6 +18,7 @@
#include <linux/platform_device.h>
#include <linux/platform_data/rtc-m48t86.h>
#include <linux/bcd.h>
+#include <linux/io.h>
#define M48T86_SEC 0x00
#define M48T86_SECALRM 0x01
@@ -38,39 +39,72 @@
#define M48T86_D 0x0d
#define M48T86_D_VRT BIT(7)
+struct m48t86_rtc_info {
+ void __iomem *index_reg;
+ void __iomem *data_reg;
+ struct rtc_device *rtc;
+ struct m48t86_ops *ops;
+};
+
+static unsigned char m48t86_readb(struct device *dev, unsigned long addr)
+{
+ struct m48t86_rtc_info *info = dev_get_drvdata(dev);
+ unsigned char value;
+
+ if (info->ops) {
+ value = info->ops->readbyte(addr);
+ } else {
+ writeb(addr, info->index_reg);
+ value = readb(info->data_reg);
+ }
+ return value;
+}
+
+static void m48t86_writeb(struct device *dev,
+ unsigned char value, unsigned long addr)
+{
+ struct m48t86_rtc_info *info = dev_get_drvdata(dev);
+
+ if (info->ops) {
+ info->ops->writebyte(value, addr);
+ } else {
+ writeb(addr, info->index_reg);
+ writeb(value, info->data_reg);
+ }
+}
+
static int m48t86_rtc_read_time(struct device *dev, struct rtc_time *tm)
{
unsigned char reg;
- struct platform_device *pdev = to_platform_device(dev);
- struct m48t86_ops *ops = dev_get_platdata(&pdev->dev);
- reg = ops->readbyte(M48T86_B);
+ reg = m48t86_readb(dev, M48T86_B);
if (reg & M48T86_B_DM) {
/* data (binary) mode */
- tm->tm_sec = ops->readbyte(M48T86_SEC);
- tm->tm_min = ops->readbyte(M48T86_MIN);
- tm->tm_hour = ops->readbyte(M48T86_HOUR) & 0x3f;
- tm->tm_mday = ops->readbyte(M48T86_DOM);
+ tm->tm_sec = m48t86_readb(dev, M48T86_SEC);
+ tm->tm_min = m48t86_readb(dev, M48T86_MIN);
+ tm->tm_hour = m48t86_readb(dev, M48T86_HOUR) & 0x3f;
+ tm->tm_mday = m48t86_readb(dev, M48T86_DOM);
/* tm_mon is 0-11 */
- tm->tm_mon = ops->readbyte(M48T86_MONTH) - 1;
- tm->tm_year = ops->readbyte(M48T86_YEAR) + 100;
- tm->tm_wday = ops->readbyte(M48T86_DOW);
+ tm->tm_mon = m48t86_readb(dev, M48T86_MONTH) - 1;
+ tm->tm_year = m48t86_readb(dev, M48T86_YEAR) + 100;
+ tm->tm_wday = m48t86_readb(dev, M48T86_DOW);
} else {
/* bcd mode */
- tm->tm_sec = bcd2bin(ops->readbyte(M48T86_SEC));
- tm->tm_min = bcd2bin(ops->readbyte(M48T86_MIN));
- tm->tm_hour = bcd2bin(ops->readbyte(M48T86_HOUR) & 0x3f);
- tm->tm_mday = bcd2bin(ops->readbyte(M48T86_DOM));
+ tm->tm_sec = bcd2bin(m48t86_readb(dev, M48T86_SEC));
+ tm->tm_min = bcd2bin(m48t86_readb(dev, M48T86_MIN));
+ tm->tm_hour = bcd2bin(m48t86_readb(dev, M48T86_HOUR) &
+ 0x3f);
+ tm->tm_mday = bcd2bin(m48t86_readb(dev, M48T86_DOM));
/* tm_mon is 0-11 */
- tm->tm_mon = bcd2bin(ops->readbyte(M48T86_MONTH)) - 1;
- tm->tm_year = bcd2bin(ops->readbyte(M48T86_YEAR)) + 100;
- tm->tm_wday = bcd2bin(ops->readbyte(M48T86_DOW));
+ tm->tm_mon = bcd2bin(m48t86_readb(dev, M48T86_MONTH)) - 1;
+ tm->tm_year = bcd2bin(m48t86_readb(dev, M48T86_YEAR)) + 100;
+ tm->tm_wday = bcd2bin(m48t86_readb(dev, M48T86_DOW));
}
/* correct the hour if the clock is in 12h mode */
if (!(reg & M48T86_B_H24))
- if (ops->readbyte(M48T86_HOUR) & 0x80)
+ if (m48t86_readb(dev, M48T86_HOUR) & 0x80)
tm->tm_hour += 12;
return rtc_valid_tm(tm);
@@ -79,38 +113,36 @@ static int m48t86_rtc_read_time(struct device *dev, struct rtc_time *tm)
static int m48t86_rtc_set_time(struct device *dev, struct rtc_time *tm)
{
unsigned char reg;
- struct platform_device *pdev = to_platform_device(dev);
- struct m48t86_ops *ops = dev_get_platdata(&pdev->dev);
- reg = ops->readbyte(M48T86_B);
+ reg = m48t86_readb(dev, M48T86_B);
/* update flag and 24h mode */
reg |= M48T86_B_SET | M48T86_B_H24;
- ops->writebyte(reg, M48T86_B);
+ m48t86_writeb(dev, reg, M48T86_B);
if (reg & M48T86_B_DM) {
/* data (binary) mode */
- ops->writebyte(tm->tm_sec, M48T86_SEC);
- ops->writebyte(tm->tm_min, M48T86_MIN);
- ops->writebyte(tm->tm_hour, M48T86_HOUR);
- ops->writebyte(tm->tm_mday, M48T86_DOM);
- ops->writebyte(tm->tm_mon + 1, M48T86_MONTH);
- ops->writebyte(tm->tm_year % 100, M48T86_YEAR);
- ops->writebyte(tm->tm_wday, M48T86_DOW);
+ m48t86_writeb(dev, tm->tm_sec, M48T86_SEC);
+ m48t86_writeb(dev, tm->tm_min, M48T86_MIN);
+ m48t86_writeb(dev, tm->tm_hour, M48T86_HOUR);
+ m48t86_writeb(dev, tm->tm_mday, M48T86_DOM);
+ m48t86_writeb(dev, tm->tm_mon + 1, M48T86_MONTH);
+ m48t86_writeb(dev, tm->tm_year % 100, M48T86_YEAR);
+ m48t86_writeb(dev, tm->tm_wday, M48T86_DOW);
} else {
/* bcd mode */
- ops->writebyte(bin2bcd(tm->tm_sec), M48T86_SEC);
- ops->writebyte(bin2bcd(tm->tm_min), M48T86_MIN);
- ops->writebyte(bin2bcd(tm->tm_hour), M48T86_HOUR);
- ops->writebyte(bin2bcd(tm->tm_mday), M48T86_DOM);
- ops->writebyte(bin2bcd(tm->tm_mon + 1), M48T86_MONTH);
- ops->writebyte(bin2bcd(tm->tm_year % 100), M48T86_YEAR);
- ops->writebyte(bin2bcd(tm->tm_wday), M48T86_DOW);
+ m48t86_writeb(dev, bin2bcd(tm->tm_sec), M48T86_SEC);
+ m48t86_writeb(dev, bin2bcd(tm->tm_min), M48T86_MIN);
+ m48t86_writeb(dev, bin2bcd(tm->tm_hour), M48T86_HOUR);
+ m48t86_writeb(dev, bin2bcd(tm->tm_mday), M48T86_DOM);
+ m48t86_writeb(dev, bin2bcd(tm->tm_mon + 1), M48T86_MONTH);
+ m48t86_writeb(dev, bin2bcd(tm->tm_year % 100), M48T86_YEAR);
+ m48t86_writeb(dev, bin2bcd(tm->tm_wday), M48T86_DOW);
}
/* update ended */
reg &= ~M48T86_B_SET;
- ops->writebyte(reg, M48T86_B);
+ m48t86_writeb(dev, reg, M48T86_B);
return 0;
}
@@ -118,15 +150,13 @@ static int m48t86_rtc_set_time(struct device *dev, struct rtc_time *tm)
static int m48t86_rtc_proc(struct device *dev, struct seq_file *seq)
{
unsigned char reg;
- struct platform_device *pdev = to_platform_device(dev);
- struct m48t86_ops *ops = dev_get_platdata(&pdev->dev);
- reg = ops->readbyte(M48T86_B);
+ reg = m48t86_readb(dev, M48T86_B);
seq_printf(seq, "mode\t\t: %s\n",
(reg & M48T86_B_DM) ? "binary" : "bcd");
- reg = ops->readbyte(M48T86_D);
+ reg = m48t86_readb(dev, M48T86_D);
seq_printf(seq, "battery\t\t: %s\n",
(reg & M48T86_D_VRT) ? "ok" : "exhausted");
@@ -140,23 +170,44 @@ static const struct rtc_class_ops m48t86_rtc_ops = {
.proc = m48t86_rtc_proc,
};
-static int m48t86_rtc_probe(struct platform_device *dev)
+static int m48t86_rtc_probe(struct platform_device *pdev)
{
+ struct m48t86_rtc_info *info;
unsigned char reg;
- struct m48t86_ops *ops = dev_get_platdata(&dev->dev);
- struct rtc_device *rtc;
- rtc = devm_rtc_device_register(&dev->dev, "m48t86",
- &m48t86_rtc_ops, THIS_MODULE);
+ info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
+ if (!info)
+ return -ENOMEM;
+
+ info->ops = dev_get_platdata(&pdev->dev);
+ if (!info->ops) {
+ struct resource *res;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res)
+ return -ENODEV;
+ info->index_reg = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(info->index_reg))
+ return PTR_ERR(info->index_reg);
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
+ if (!res)
+ return -ENODEV;
+ info->data_reg = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(info->data_reg))
+ return PTR_ERR(info->data_reg);
+ }
- if (IS_ERR(rtc))
- return PTR_ERR(rtc);
+ dev_set_drvdata(&pdev->dev, info);
- platform_set_drvdata(dev, rtc);
+ info->rtc = devm_rtc_device_register(&pdev->dev, "m48t86",
+ &m48t86_rtc_ops, THIS_MODULE);
+ if (IS_ERR(info->rtc))
+ return PTR_ERR(info->rtc);
/* read battery status */
- reg = ops->readbyte(M48T86_D);
- dev_info(&dev->dev, "battery %s\n",
+ reg = m48t86_readb(&pdev->dev, M48T86_D);
+ dev_info(&pdev->dev, "battery %s\n",
(reg & M48T86_D_VRT) ? "ok" : "exhausted");
return 0;
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-21 21:25:44 +0000