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-rw-r--r--drivers/rtc/Kconfig7
-rw-r--r--drivers/rtc/rtc-m48t59.c47
-rw-r--r--include/linux/rtc/m48t59.h45
3 files changed, 69 insertions, 30 deletions
diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig
index ecdff200247..daf08fe980d 100644
--- a/drivers/rtc/Kconfig
+++ b/drivers/rtc/Kconfig
@@ -406,10 +406,13 @@ config RTC_DRV_M48T86
will be called rtc-m48t86.
config RTC_DRV_M48T59
- tristate "ST M48T59"
+ tristate "ST M48T59/M48T08/M48T02"
help
If you say Y here you will get support for the
- ST M48T59 RTC chip.
+ ST M48T59 RTC chip and compatible ST M48T08 and M48T02.
+
+ These chips are usually found in Sun SPARC and UltraSPARC
+ workstations.
This driver can also be built as a module, if so, the module
will be called "rtc-m48t59".
diff --git a/drivers/rtc/rtc-m48t59.c b/drivers/rtc/rtc-m48t59.c
index e085ab2c3db..50f9f10b32f 100644
--- a/drivers/rtc/rtc-m48t59.c
+++ b/drivers/rtc/rtc-m48t59.c
@@ -24,8 +24,9 @@
#define NO_IRQ (-1)
#endif
-#define M48T59_READ(reg) pdata->read_byte(dev, reg)
-#define M48T59_WRITE(val, reg) pdata->write_byte(dev, reg, val)
+#define M48T59_READ(reg) (pdata->read_byte(dev, pdata->offset + reg))
+#define M48T59_WRITE(val, reg) \
+ (pdata->write_byte(dev, pdata->offset + reg, val))
#define M48T59_SET_BITS(mask, reg) \
M48T59_WRITE((M48T59_READ(reg) | (mask)), (reg))
@@ -309,6 +310,11 @@ static const struct rtc_class_ops m48t59_rtc_ops = {
.proc = m48t59_rtc_proc,
};
+static const struct rtc_class_ops m48t02_rtc_ops = {
+ .read_time = m48t59_rtc_read_time,
+ .set_time = m48t59_rtc_set_time,
+};
+
static ssize_t m48t59_nvram_read(struct kobject *kobj,
struct bin_attribute *bin_attr,
char *buf, loff_t pos, size_t size)
@@ -320,7 +326,7 @@ static ssize_t m48t59_nvram_read(struct kobject *kobj,
ssize_t cnt = 0;
unsigned long flags;
- for (; size > 0 && pos < M48T59_NVRAM_SIZE; cnt++, size--) {
+ for (; size > 0 && pos < pdata->offset; cnt++, size--) {
spin_lock_irqsave(&m48t59->lock, flags);
*buf++ = M48T59_READ(cnt);
spin_unlock_irqrestore(&m48t59->lock, flags);
@@ -340,7 +346,7 @@ static ssize_t m48t59_nvram_write(struct kobject *kobj,
ssize_t cnt = 0;
unsigned long flags;
- for (; size > 0 && pos < M48T59_NVRAM_SIZE; cnt++, size--) {
+ for (; size > 0 && pos < pdata->offset; cnt++, size--) {
spin_lock_irqsave(&m48t59->lock, flags);
M48T59_WRITE(*buf++, cnt);
spin_unlock_irqrestore(&m48t59->lock, flags);
@@ -357,7 +363,6 @@ static struct bin_attribute m48t59_nvram_attr = {
},
.read = m48t59_nvram_read,
.write = m48t59_nvram_write,
- .size = M48T59_NVRAM_SIZE,
};
static int __devinit m48t59_rtc_probe(struct platform_device *pdev)
@@ -366,6 +371,8 @@ static int __devinit m48t59_rtc_probe(struct platform_device *pdev)
struct m48t59_private *m48t59 = NULL;
struct resource *res;
int ret = -ENOMEM;
+ char *name;
+ const struct rtc_class_ops *ops;
/* This chip could be memory-mapped or I/O-mapped */
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
@@ -390,6 +397,8 @@ static int __devinit m48t59_rtc_probe(struct platform_device *pdev)
/* Ensure we only kmalloc platform data once */
pdev->dev.platform_data = pdata;
}
+ if (!pdata->type)
+ pdata->type = M48T59RTC_TYPE_M48T59;
/* Try to use the generic memory read/write ops */
if (!pdata->write_byte)
@@ -419,14 +428,36 @@ static int __devinit m48t59_rtc_probe(struct platform_device *pdev)
if (ret)
goto out;
}
+ switch (pdata->type) {
+ case M48T59RTC_TYPE_M48T59:
+ name = "m48t59";
+ ops = &m48t59_rtc_ops;
+ pdata->offset = 0x1ff0;
+ break;
+ case M48T59RTC_TYPE_M48T02:
+ name = "m48t02";
+ ops = &m48t02_rtc_ops;
+ pdata->offset = 0x7f0;
+ break;
+ case M48T59RTC_TYPE_M48T08:
+ name = "m48t08";
+ ops = &m48t02_rtc_ops;
+ pdata->offset = 0x1ff0;
+ break;
+ default:
+ dev_err(&pdev->dev, "Unknown RTC type\n");
+ ret = -ENODEV;
+ goto out;
+ }
- m48t59->rtc = rtc_device_register("m48t59", &pdev->dev,
- &m48t59_rtc_ops, THIS_MODULE);
+ m48t59->rtc = rtc_device_register(name, &pdev->dev, ops, THIS_MODULE);
if (IS_ERR(m48t59->rtc)) {
ret = PTR_ERR(m48t59->rtc);
goto out;
}
+ m48t59_nvram_attr.size = pdata->offset;
+
ret = sysfs_create_bin_file(&pdev->dev.kobj, &m48t59_nvram_attr);
if (ret)
goto out;
@@ -489,5 +520,5 @@ module_init(m48t59_rtc_init);
module_exit(m48t59_rtc_exit);
MODULE_AUTHOR("Mark Zhan <rongkai.zhan@windriver.com>");
-MODULE_DESCRIPTION("M48T59 RTC driver");
+MODULE_DESCRIPTION("M48T59/M48T02/M48T08 RTC driver");
MODULE_LICENSE("GPL");
diff --git a/include/linux/rtc/m48t59.h b/include/linux/rtc/m48t59.h
index e8c7c21ceb1..41798505d15 100644
--- a/include/linux/rtc/m48t59.h
+++ b/include/linux/rtc/m48t59.h
@@ -18,40 +18,45 @@
/*
* M48T59 Register Offset
*/
-#define M48T59_YEAR 0x1fff
-#define M48T59_MONTH 0x1ffe
-#define M48T59_MDAY 0x1ffd /* Day of Month */
-#define M48T59_WDAY 0x1ffc /* Day of Week */
+#define M48T59_YEAR 0xf
+#define M48T59_MONTH 0xe
+#define M48T59_MDAY 0xd /* Day of Month */
+#define M48T59_WDAY 0xc /* Day of Week */
#define M48T59_WDAY_CB 0x20 /* Century Bit */
#define M48T59_WDAY_CEB 0x10 /* Century Enable Bit */
-#define M48T59_HOUR 0x1ffb
-#define M48T59_MIN 0x1ffa
-#define M48T59_SEC 0x1ff9
-#define M48T59_CNTL 0x1ff8
+#define M48T59_HOUR 0xb
+#define M48T59_MIN 0xa
+#define M48T59_SEC 0x9
+#define M48T59_CNTL 0x8
#define M48T59_CNTL_READ 0x40
#define M48T59_CNTL_WRITE 0x80
-#define M48T59_WATCHDOG 0x1ff7
-#define M48T59_INTR 0x1ff6
+#define M48T59_WATCHDOG 0x7
+#define M48T59_INTR 0x6
#define M48T59_INTR_AFE 0x80 /* Alarm Interrupt Enable */
#define M48T59_INTR_ABE 0x20
-#define M48T59_ALARM_DATE 0x1ff5
-#define M48T59_ALARM_HOUR 0x1ff4
-#define M48T59_ALARM_MIN 0x1ff3
-#define M48T59_ALARM_SEC 0x1ff2
-#define M48T59_UNUSED 0x1ff1
-#define M48T59_FLAGS 0x1ff0
+#define M48T59_ALARM_DATE 0x5
+#define M48T59_ALARM_HOUR 0x4
+#define M48T59_ALARM_MIN 0x3
+#define M48T59_ALARM_SEC 0x2
+#define M48T59_UNUSED 0x1
+#define M48T59_FLAGS 0x0
#define M48T59_FLAGS_WDT 0x80 /* watchdog timer expired */
#define M48T59_FLAGS_AF 0x40 /* alarm */
#define M48T59_FLAGS_BF 0x10 /* low battery */
-#define M48T59_NVRAM_SIZE 0x1ff0
+#define M48T59RTC_TYPE_M48T59 0 /* to keep compatibility */
+#define M48T59RTC_TYPE_M48T02 1
+#define M48T59RTC_TYPE_M48T08 2
struct m48t59_plat_data {
- /* The method to access M48T59 registers,
- * NOTE: The 'ofs' should be 0x00~0x1fff
- */
+ /* The method to access M48T59 registers */
void (*write_byte)(struct device *dev, u32 ofs, u8 val);
unsigned char (*read_byte)(struct device *dev, u32 ofs);
+
+ int type; /* RTC model */
+
+ /* offset to RTC registers, automatically set according to the type */
+ unsigned int offset;
};
#endif /* _LINUX_RTC_M48T59_H_ */
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-22 01:10:00 +0000