mirror of
https://github.com/torvalds/linux.git
synced 2024-11-10 14:11:52 +00:00
rtc: Add an RTC driver for the Ricoh RP5C01
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Acked-by: Alessandro Zummo <alessandro.zummo@towertech.it>
This commit is contained in:
Geert Uytterhoeven
parent
4f9b9bba1d
commit
4f672ce298
@ -538,6 +538,16 @@ config RTC_DRV_BQ4802
|
||||
This driver can also be built as a module. If so, the module
|
||||
will be called rtc-bq4802.
|
||||
|
||||
config RTC_DRV_RP5C01
|
||||
tristate "Ricoh RP5C01"
|
||||
help
|
||||
If you say yes here you get support for the Ricoh RP5C01
|
||||
timekeeping chip. It is used in some Amiga models (e.g. A3000
|
||||
and A4000).
|
||||
|
||||
This driver can also be built as a module. If so, the module
|
||||
will be called rtc-rp5c01.
|
||||
|
||||
config RTC_DRV_V3020
|
||||
tristate "EM Microelectronic V3020"
|
||||
help
|
||||
|
||||
@ -65,6 +65,7 @@ obj-$(CONFIG_RTC_DRV_PL031) += rtc-pl031.o
|
||||
obj-$(CONFIG_RTC_DRV_PS3) += rtc-ps3.o
|
||||
obj-$(CONFIG_RTC_DRV_PXA) += rtc-pxa.o
|
||||
obj-$(CONFIG_RTC_DRV_R9701) += rtc-r9701.o
|
||||
obj-$(CONFIG_RTC_DRV_RP5C01) += rtc-rp5c01.o
|
||||
obj-$(CONFIG_RTC_DRV_RS5C313) += rtc-rs5c313.o
|
||||
obj-$(CONFIG_RTC_DRV_RS5C348) += rtc-rs5c348.o
|
||||
obj-$(CONFIG_RTC_DRV_RS5C372) += rtc-rs5c372.o
|
||||
|
||||
222
drivers/rtc/rtc-rp5c01.c
Normal file
222
drivers/rtc/rtc-rp5c01.c
Normal file
@ -0,0 +1,222 @@
|
||||
/*
|
||||
* Ricoh RP5C01 RTC Driver
|
||||
*
|
||||
* Copyright 2009 Geert Uytterhoeven
|
||||
*
|
||||
* Based on the A3000 TOD code in arch/m68k/amiga/config.c
|
||||
* Copyright (C) 1993 Hamish Macdonald
|
||||
*/
|
||||
|
||||
#include <linux/io.h>
|
||||
#include <linux/kernel.h>
|
||||
#include <linux/module.h>
|
||||
#include <linux/platform_device.h>
|
||||
#include <linux/rtc.h>
|
||||
|
||||
|
||||
enum {
|
||||
RP5C01_1_SECOND = 0x0, /* MODE 00 */
|
||||
RP5C01_10_SECOND = 0x1, /* MODE 00 */
|
||||
RP5C01_1_MINUTE = 0x2, /* MODE 00 and MODE 01 */
|
||||
RP5C01_10_MINUTE = 0x3, /* MODE 00 and MODE 01 */
|
||||
RP5C01_1_HOUR = 0x4, /* MODE 00 and MODE 01 */
|
||||
RP5C01_10_HOUR = 0x5, /* MODE 00 and MODE 01 */
|
||||
RP5C01_DAY_OF_WEEK = 0x6, /* MODE 00 and MODE 01 */
|
||||
RP5C01_1_DAY = 0x7, /* MODE 00 and MODE 01 */
|
||||
RP5C01_10_DAY = 0x8, /* MODE 00 and MODE 01 */
|
||||
RP5C01_1_MONTH = 0x9, /* MODE 00 */
|
||||
RP5C01_10_MONTH = 0xa, /* MODE 00 */
|
||||
RP5C01_1_YEAR = 0xb, /* MODE 00 */
|
||||
RP5C01_10_YEAR = 0xc, /* MODE 00 */
|
||||
|
||||
RP5C01_12_24_SELECT = 0xa, /* MODE 01 */
|
||||
RP5C01_LEAP_YEAR = 0xb, /* MODE 01 */
|
||||
|
||||
RP5C01_MODE = 0xd, /* all modes */
|
||||
RP5C01_TEST = 0xe, /* all modes */
|
||||
RP5C01_RESET = 0xf, /* all modes */
|
||||
};
|
||||
|
||||
#define RP5C01_12_24_SELECT_12 (0 << 0)
|
||||
#define RP5C01_12_24_SELECT_24 (1 << 0)
|
||||
|
||||
#define RP5C01_10_HOUR_AM (0 << 1)
|
||||
#define RP5C01_10_HOUR_PM (1 << 1)
|
||||
|
||||
#define RP5C01_MODE_TIMER_EN (1 << 3) /* timer enable */
|
||||
#define RP5C01_MODE_ALARM_EN (1 << 2) /* alarm enable */
|
||||
|
||||
#define RP5C01_MODE_MODE_MASK (3 << 0)
|
||||
#define RP5C01_MODE_MODE00 (0 << 0) /* time */
|
||||
#define RP5C01_MODE_MODE01 (1 << 0) /* alarm, 12h/24h, leap year */
|
||||
#define RP5C01_MODE_RAM_BLOCK10 (2 << 0) /* RAM 4 bits x 13 */
|
||||
#define RP5C01_MODE_RAM_BLOCK11 (3 << 0) /* RAM 4 bits x 13 */
|
||||
|
||||
#define RP5C01_RESET_1HZ_PULSE (1 << 3)
|
||||
#define RP5C01_RESET_16HZ_PULSE (1 << 2)
|
||||
#define RP5C01_RESET_SECOND (1 << 1) /* reset divider stages for */
|
||||
/* seconds or smaller units */
|
||||
#define RP5C01_RESET_ALARM (1 << 0) /* reset all alarm registers */
|
||||
|
||||
|
||||
struct rp5c01_priv {
|
||||
u32 __iomem *regs;
|
||||
struct rtc_device *rtc;
|
||||
};
|
||||
|
||||
static inline unsigned int rp5c01_read(struct rp5c01_priv *priv,
|
||||
unsigned int reg)
|
||||
{
|
||||
return __raw_readl(&priv->regs[reg]) & 0xf;
|
||||
}
|
||||
|
||||
static inline void rp5c01_write(struct rp5c01_priv *priv, unsigned int val,
|
||||
unsigned int reg)
|
||||
{
|
||||
return __raw_writel(val, &priv->regs[reg]);
|
||||
}
|
||||
|
||||
static void rp5c01_lock(struct rp5c01_priv *priv)
|
||||
{
|
||||
rp5c01_write(priv, RP5C01_MODE_MODE00, RP5C01_MODE);
|
||||
}
|
||||
|
||||
static void rp5c01_unlock(struct rp5c01_priv *priv)
|
||||
{
|
||||
rp5c01_write(priv, RP5C01_MODE_TIMER_EN | RP5C01_MODE_MODE01,
|
||||
RP5C01_MODE);
|
||||
}
|
||||
|
||||
static int rp5c01_read_time(struct device *dev, struct rtc_time *tm)
|
||||
{
|
||||
struct rp5c01_priv *priv = dev_get_drvdata(dev);
|
||||
|
||||
rp5c01_lock(priv);
|
||||
|
||||
tm->tm_sec = rp5c01_read(priv, RP5C01_10_SECOND) * 10 +
|
||||
rp5c01_read(priv, RP5C01_1_SECOND);
|
||||
tm->tm_min = rp5c01_read(priv, RP5C01_10_MINUTE) * 10 +
|
||||
rp5c01_read(priv, RP5C01_1_MINUTE);
|
||||
tm->tm_hour = rp5c01_read(priv, RP5C01_10_HOUR) * 10 +
|
||||
rp5c01_read(priv, RP5C01_1_HOUR);
|
||||
tm->tm_mday = rp5c01_read(priv, RP5C01_10_DAY) * 10 +
|
||||
rp5c01_read(priv, RP5C01_1_DAY);
|
||||
tm->tm_wday = rp5c01_read(priv, RP5C01_DAY_OF_WEEK);
|
||||
tm->tm_mon = rp5c01_read(priv, RP5C01_10_MONTH) * 10 +
|
||||
rp5c01_read(priv, RP5C01_1_MONTH) - 1;
|
||||
tm->tm_year = rp5c01_read(priv, RP5C01_10_YEAR) * 10 +
|
||||
rp5c01_read(priv, RP5C01_1_YEAR);
|
||||
if (tm->tm_year <= 69)
|
||||
tm->tm_year += 100;
|
||||
|
||||
rp5c01_unlock(priv);
|
||||
|
||||
return rtc_valid_tm(tm);
|
||||
}
|
||||
|
||||
static int rp5c01_set_time(struct device *dev, struct rtc_time *tm)
|
||||
{
|
||||
struct rp5c01_priv *priv = dev_get_drvdata(dev);
|
||||
|
||||
rp5c01_lock(priv);
|
||||
|
||||
rp5c01_write(priv, tm->tm_sec / 10, RP5C01_10_SECOND);
|
||||
rp5c01_write(priv, tm->tm_sec % 10, RP5C01_1_SECOND);
|
||||
rp5c01_write(priv, tm->tm_min / 10, RP5C01_10_MINUTE);
|
||||
rp5c01_write(priv, tm->tm_min % 10, RP5C01_1_MINUTE);
|
||||
rp5c01_write(priv, tm->tm_hour / 10, RP5C01_10_HOUR);
|
||||
rp5c01_write(priv, tm->tm_hour % 10, RP5C01_1_HOUR);
|
||||
rp5c01_write(priv, tm->tm_mday / 10, RP5C01_10_DAY);
|
||||
rp5c01_write(priv, tm->tm_mday % 10, RP5C01_1_DAY);
|
||||
if (tm->tm_wday != -1)
|
||||
rp5c01_write(priv, tm->tm_wday, RP5C01_DAY_OF_WEEK);
|
||||
rp5c01_write(priv, (tm->tm_mon + 1) / 10, RP5C01_10_MONTH);
|
||||
rp5c01_write(priv, (tm->tm_mon + 1) % 10, RP5C01_1_MONTH);
|
||||
if (tm->tm_year >= 100)
|
||||
tm->tm_year -= 100;
|
||||
rp5c01_write(priv, tm->tm_year / 10, RP5C01_10_YEAR);
|
||||
rp5c01_write(priv, tm->tm_year % 10, RP5C01_1_YEAR);
|
||||
|
||||
rp5c01_unlock(priv);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static const struct rtc_class_ops rp5c01_rtc_ops = {
|
||||
.read_time = rp5c01_read_time,
|
||||
.set_time = rp5c01_set_time,
|
||||
};
|
||||
|
||||
static int __init rp5c01_rtc_probe(struct platform_device *dev)
|
||||
{
|
||||
struct resource *res;
|
||||
struct rp5c01_priv *priv;
|
||||
struct rtc_device *rtc;
|
||||
int error;
|
||||
|
||||
res = platform_get_resource(dev, IORESOURCE_MEM, 0);
|
||||
if (!res)
|
||||
return -ENODEV;
|
||||
|
||||
priv = kzalloc(sizeof(*priv), GFP_KERNEL);
|
||||
if (!priv)
|
||||
return -ENOMEM;
|
||||
|
||||
priv->regs = ioremap(res->start, resource_size(res));
|
||||
if (!priv->regs) {
|
||||
error = -ENOMEM;
|
||||
goto out_free_priv;
|
||||
}
|
||||
|
||||
rtc = rtc_device_register("rtc-rp5c01", &dev->dev, &rp5c01_rtc_ops,
|
||||
THIS_MODULE);
|
||||
if (IS_ERR(rtc)) {
|
||||
error = PTR_ERR(rtc);
|
||||
goto out_unmap;
|
||||
}
|
||||
|
||||
priv->rtc = rtc;
|
||||
platform_set_drvdata(dev, priv);
|
||||
return 0;
|
||||
|
||||
out_unmap:
|
||||
iounmap(priv->regs);
|
||||
out_free_priv:
|
||||
kfree(priv);
|
||||
return error;
|
||||
}
|
||||
|
||||
static int __exit rp5c01_rtc_remove(struct platform_device *dev)
|
||||
{
|
||||
struct rp5c01_priv *priv = platform_get_drvdata(dev);
|
||||
|
||||
rtc_device_unregister(priv->rtc);
|
||||
iounmap(priv->regs);
|
||||
kfree(priv);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static struct platform_driver rp5c01_rtc_driver = {
|
||||
.driver = {
|
||||
.name = "rtc-rp5c01",
|
||||
.owner = THIS_MODULE,
|
||||
},
|
||||
.remove = __exit_p(rp5c01_rtc_remove),
|
||||
};
|
||||
|
||||
static int __init rp5c01_rtc_init(void)
|
||||
{
|
||||
return platform_driver_probe(&rp5c01_rtc_driver, rp5c01_rtc_probe);
|
||||
}
|
||||
|
||||
static void __exit rp5c01_rtc_fini(void)
|
||||
{
|
||||
platform_driver_unregister(&rp5c01_rtc_driver);
|
||||
}
|
||||
|
||||
module_init(rp5c01_rtc_init);
|
||||
module_exit(rp5c01_rtc_fini);
|
||||
|
||||
MODULE_AUTHOR("Geert Uytterhoeven <geert@linux-m68k.org>");
|
||||
MODULE_LICENSE("GPL");
|
||||
MODULE_DESCRIPTION("Ricoh RP5C01 RTC driver");
|
||||
MODULE_ALIAS("platform:rtc-rp5c01");
|
||||
Loading…
Reference in New Issue
Block a user