* [PATCH v3 2/2] m68k: mvme147, mvme16x: Adopt rtc-m48t59 platform driver
2024-10-08 8:51 [PATCH v3 0/2] MVME: Adopt standard RTC driver Finn Thain
@ 2024-10-08 8:51 ` Finn Thain
2024-11-05 14:21 ` Geert Uytterhoeven
2024-11-11 9:27 ` Geert Uytterhoeven
2024-10-08 8:51 ` [PATCH v3 1/2] rtc: m48t59: Use platform_data struct for year offset value Finn Thain
2024-11-06 0:03 ` [PATCH v3 0/2] MVME: Adopt standard RTC driver Finn Thain
2 siblings, 2 replies; 7+ messages in thread
From: Finn Thain @ 2024-10-08 8:51 UTC (permalink / raw)
To: Geert Uytterhoeven
Cc: Daniel Palmer, Michael Pavone, linux-m68k, linux-rtc,
linux-kernel
Both mvme147 and mvme16x platforms have their own RTC driver
implementations that duplicate functionality provided by the rtc-m48t59
driver. Adopt the rtc-m48t59 driver and remove the other ones.
Tested-by: Daniel Palmer <daniel@0x0f.com>
Signed-off-by: Finn Thain <fthain@linux-m68k.org>
---
This patch depends upon the m48t59 driver changes in the preceding patch.
Changed since v1:
- Initialize yy_offset in struct m48t59_plat_data.
---
arch/m68k/configs/multi_defconfig | 1 +
arch/m68k/configs/mvme147_defconfig | 1 +
arch/m68k/configs/mvme16x_defconfig | 1 +
arch/m68k/include/asm/mvme147hw.h | 19 +---
arch/m68k/include/asm/mvme16xhw.h | 18 +--
arch/m68k/mvme147/config.c | 55 ++++------
arch/m68k/mvme16x/Makefile | 2 +-
arch/m68k/mvme16x/config.c | 57 ++++------
arch/m68k/mvme16x/rtc.c | 165 ----------------------------
9 files changed, 54 insertions(+), 265 deletions(-)
delete mode 100644 arch/m68k/mvme16x/rtc.c
diff --git a/arch/m68k/configs/multi_defconfig b/arch/m68k/configs/multi_defconfig
index 638df8442c98..617ac93298f3 100644
--- a/arch/m68k/configs/multi_defconfig
+++ b/arch/m68k/configs/multi_defconfig
@@ -506,6 +506,7 @@ CONFIG_RTC_CLASS=y
CONFIG_RTC_DRV_MSM6242=m
CONFIG_RTC_DRV_RP5C01=m
CONFIG_RTC_DRV_GENERIC=m
+CONFIG_RTC_DRV_M48T59=m
# CONFIG_VIRTIO_MENU is not set
# CONFIG_VHOST_MENU is not set
# CONFIG_IOMMU_SUPPORT is not set
diff --git a/arch/m68k/configs/mvme147_defconfig b/arch/m68k/configs/mvme147_defconfig
index 2248db426081..4a0928b3b842 100644
--- a/arch/m68k/configs/mvme147_defconfig
+++ b/arch/m68k/configs/mvme147_defconfig
@@ -392,6 +392,7 @@ CONFIG_UHID=m
CONFIG_RTC_CLASS=y
# CONFIG_RTC_NVMEM is not set
CONFIG_RTC_DRV_GENERIC=m
+CONFIG_RTC_DRV_M48T59=y
# CONFIG_VIRTIO_MENU is not set
# CONFIG_VHOST_MENU is not set
# CONFIG_IOMMU_SUPPORT is not set
diff --git a/arch/m68k/configs/mvme16x_defconfig b/arch/m68k/configs/mvme16x_defconfig
index 2975b66521f6..481fb2810f1e 100644
--- a/arch/m68k/configs/mvme16x_defconfig
+++ b/arch/m68k/configs/mvme16x_defconfig
@@ -393,6 +393,7 @@ CONFIG_UHID=m
CONFIG_RTC_CLASS=y
# CONFIG_RTC_NVMEM is not set
CONFIG_RTC_DRV_GENERIC=m
+CONFIG_RTC_DRV_M48T59=y
# CONFIG_VIRTIO_MENU is not set
# CONFIG_VHOST_MENU is not set
# CONFIG_IOMMU_SUPPORT is not set
diff --git a/arch/m68k/include/asm/mvme147hw.h b/arch/m68k/include/asm/mvme147hw.h
index dbf88059e47a..6ad93bac06f9 100644
--- a/arch/m68k/include/asm/mvme147hw.h
+++ b/arch/m68k/include/asm/mvme147hw.h
@@ -4,24 +4,7 @@
#include <asm/irq.h>
-typedef struct {
- unsigned char
- ctrl,
- bcd_sec,
- bcd_min,
- bcd_hr,
- bcd_dow,
- bcd_dom,
- bcd_mth,
- bcd_year;
-} MK48T02;
-
-#define RTC_WRITE 0x80
-#define RTC_READ 0x40
-#define RTC_STOP 0x20
-
-#define m147_rtc ((MK48T02 * volatile)0xfffe07f8)
-
+#define MVME147_RTC_BASE 0xfffe0000
struct pcc_regs {
volatile u_long dma_tadr;
diff --git a/arch/m68k/include/asm/mvme16xhw.h b/arch/m68k/include/asm/mvme16xhw.h
index cc7f5ae1220f..ff1126a51fbe 100644
--- a/arch/m68k/include/asm/mvme16xhw.h
+++ b/arch/m68k/include/asm/mvme16xhw.h
@@ -24,23 +24,7 @@ typedef struct {
#define mvmelp ((*(volatile MVMElpPtr)(MVME_LPR_BASE)))
-typedef struct {
- unsigned char
- ctrl,
- bcd_sec,
- bcd_min,
- bcd_hr,
- bcd_dow,
- bcd_dom,
- bcd_mth,
- bcd_year;
-} MK48T08_t, *MK48T08ptr_t;
-
-#define RTC_WRITE 0x80
-#define RTC_READ 0x40
-#define RTC_STOP 0x20
-
-#define MVME_RTC_BASE 0xfffc1ff8
+#define MVME_RTC_BASE 0xfffc0000
#define MVME_I596_BASE 0xfff46000
diff --git a/arch/m68k/mvme147/config.c b/arch/m68k/mvme147/config.c
index aa46a80e65a2..e243f2770b91 100644
--- a/arch/m68k/mvme147/config.c
+++ b/arch/m68k/mvme147/config.c
@@ -19,8 +19,9 @@
#include <linux/linkage.h>
#include <linux/init.h>
#include <linux/major.h>
-#include <linux/rtc.h>
#include <linux/interrupt.h>
+#include <linux/platform_device.h>
+#include <linux/rtc/m48t59.h>
#include <asm/bootinfo.h>
#include <asm/bootinfo-vme.h>
@@ -36,13 +37,9 @@
static void mvme147_get_model(char *model);
extern void mvme147_sched_init(void);
-extern int mvme147_hwclk (int, struct rtc_time *);
extern void mvme147_reset (void);
-static int bcd2int (unsigned char b);
-
-
int __init mvme147_parse_bootinfo(const struct bi_record *bi)
{
uint16_t tag = be16_to_cpu(bi->tag);
@@ -80,7 +77,6 @@ void __init config_mvme147(void)
{
mach_sched_init = mvme147_sched_init;
mach_init_IRQ = mvme147_init_IRQ;
- mach_hwclk = mvme147_hwclk;
mach_reset = mvme147_reset;
mach_get_model = mvme147_get_model;
@@ -89,6 +85,28 @@ void __init config_mvme147(void)
vme_brdtype = VME_TYPE_MVME147;
}
+static struct resource m48t59_rsrc[] = {
+ DEFINE_RES_MEM(MVME147_RTC_BASE, 0x800),
+};
+
+static struct m48t59_plat_data m48t59_data = {
+ .type = M48T59RTC_TYPE_M48T02,
+ .yy_offset = 70,
+};
+
+static int __init mvme147_platform_init(void)
+{
+ if (!MACH_IS_MVME147)
+ return 0;
+
+ platform_device_register_resndata(NULL, "rtc-m48t59", -1,
+ m48t59_rsrc, ARRAY_SIZE(m48t59_rsrc),
+ &m48t59_data, sizeof(m48t59_data));
+ return 0;
+}
+
+arch_initcall(mvme147_platform_init);
+
static u64 mvme147_read_clk(struct clocksource *cs);
static struct clocksource mvme147_clk = {
@@ -162,31 +180,6 @@ static u64 mvme147_read_clk(struct clocksource *cs)
return ticks;
}
-static int bcd2int (unsigned char b)
-{
- return ((b>>4)*10 + (b&15));
-}
-
-int mvme147_hwclk(int op, struct rtc_time *t)
-{
- if (!op) {
- m147_rtc->ctrl = RTC_READ;
- t->tm_year = bcd2int (m147_rtc->bcd_year);
- t->tm_mon = bcd2int(m147_rtc->bcd_mth) - 1;
- t->tm_mday = bcd2int (m147_rtc->bcd_dom);
- t->tm_hour = bcd2int (m147_rtc->bcd_hr);
- t->tm_min = bcd2int (m147_rtc->bcd_min);
- t->tm_sec = bcd2int (m147_rtc->bcd_sec);
- m147_rtc->ctrl = 0;
- if (t->tm_year < 70)
- t->tm_year += 100;
- } else {
- /* FIXME Setting the time is not yet supported */
- return -EOPNOTSUPP;
- }
- return 0;
-}
-
#define SCC_DELAY do { __asm__ __volatile__ ("nop; nop;"); } while (0)
static void scc_write(char ch)
diff --git a/arch/m68k/mvme16x/Makefile b/arch/m68k/mvme16x/Makefile
index a8a368c2cbea..02f9e4ad8209 100644
--- a/arch/m68k/mvme16x/Makefile
+++ b/arch/m68k/mvme16x/Makefile
@@ -3,4 +3,4 @@
# Makefile for Linux arch/m68k/mvme16x source directory
#
-obj-y := config.o rtc.o
+obj-y := config.o
diff --git a/arch/m68k/mvme16x/config.c b/arch/m68k/mvme16x/config.c
index d1fbd1704d65..99768fe8da73 100644
--- a/arch/m68k/mvme16x/config.c
+++ b/arch/m68k/mvme16x/config.c
@@ -21,9 +21,10 @@
#include <linux/linkage.h>
#include <linux/init.h>
#include <linux/major.h>
-#include <linux/rtc.h>
#include <linux/interrupt.h>
#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/rtc/m48t59.h>
#include <asm/bootinfo.h>
#include <asm/bootinfo-vme.h>
@@ -39,16 +40,10 @@
extern t_bdid mvme_bdid;
-static MK48T08ptr_t volatile rtc = (MK48T08ptr_t)MVME_RTC_BASE;
-
static void mvme16x_get_model(char *model);
extern void mvme16x_sched_init(void);
-extern int mvme16x_hwclk (int, struct rtc_time *);
extern void mvme16x_reset (void);
-int bcd2int (unsigned char b);
-
-
unsigned short mvme16x_config;
EXPORT_SYMBOL(mvme16x_config);
@@ -268,7 +263,6 @@ void __init config_mvme16x(void)
mach_sched_init = mvme16x_sched_init;
mach_init_IRQ = mvme16x_init_IRQ;
- mach_hwclk = mvme16x_hwclk;
mach_reset = mvme16x_reset;
mach_get_model = mvme16x_get_model;
mach_get_hardware_list = mvme16x_get_hardware_list;
@@ -312,6 +306,28 @@ void __init config_mvme16x(void)
}
}
+static struct resource m48t59_rsrc[] = {
+ DEFINE_RES_MEM(MVME_RTC_BASE, 0x2000),
+};
+
+static struct m48t59_plat_data m48t59_data = {
+ .type = M48T59RTC_TYPE_M48T08,
+ .yy_offset = 70,
+};
+
+static int __init mvme16x_platform_init(void)
+{
+ if (!MACH_IS_MVME16x)
+ return 0;
+
+ platform_device_register_resndata(NULL, "rtc-m48t59", -1,
+ m48t59_rsrc, ARRAY_SIZE(m48t59_rsrc),
+ &m48t59_data, sizeof(m48t59_data));
+ return 0;
+}
+
+arch_initcall(mvme16x_platform_init);
+
static irqreturn_t mvme16x_abort_int (int irq, void *dev_id)
{
unsigned long *new = (unsigned long *)vectors;
@@ -426,28 +442,3 @@ static u64 mvme16x_read_clk(struct clocksource *cs)
return ticks;
}
-
-int bcd2int (unsigned char b)
-{
- return ((b>>4)*10 + (b&15));
-}
-
-int mvme16x_hwclk(int op, struct rtc_time *t)
-{
- if (!op) {
- rtc->ctrl = RTC_READ;
- t->tm_year = bcd2int (rtc->bcd_year);
- t->tm_mon = bcd2int(rtc->bcd_mth) - 1;
- t->tm_mday = bcd2int (rtc->bcd_dom);
- t->tm_hour = bcd2int (rtc->bcd_hr);
- t->tm_min = bcd2int (rtc->bcd_min);
- t->tm_sec = bcd2int (rtc->bcd_sec);
- rtc->ctrl = 0;
- if (t->tm_year < 70)
- t->tm_year += 100;
- } else {
- /* FIXME Setting the time is not yet supported */
- return -EOPNOTSUPP;
- }
- return 0;
-}
diff --git a/arch/m68k/mvme16x/rtc.c b/arch/m68k/mvme16x/rtc.c
deleted file mode 100644
index ccbaae1125e6..000000000000
--- a/arch/m68k/mvme16x/rtc.c
+++ /dev/null
@@ -1,165 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * Real Time Clock interface for Linux on the MVME16x
- *
- * Based on the PC driver by Paul Gortmaker.
- */
-
-#define RTC_VERSION "1.00"
-
-#include <linux/types.h>
-#include <linux/errno.h>
-#include <linux/miscdevice.h>
-#include <linux/ioport.h>
-#include <linux/capability.h>
-#include <linux/fcntl.h>
-#include <linux/init.h>
-#include <linux/poll.h>
-#include <linux/rtc.h> /* For struct rtc_time and ioctls, etc */
-#include <linux/bcd.h>
-#include <asm/mvme16xhw.h>
-
-#include <asm/io.h>
-#include <linux/uaccess.h>
-#include <asm/setup.h>
-
-/*
- * We sponge a minor off of the misc major. No need slurping
- * up another valuable major dev number for this. If you add
- * an ioctl, make sure you don't conflict with SPARC's RTC
- * ioctls.
- */
-
-static const unsigned char days_in_mo[] =
-{0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
-
-static atomic_t rtc_ready = ATOMIC_INIT(1);
-
-static long rtc_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
-{
- volatile MK48T08ptr_t rtc = (MK48T08ptr_t)MVME_RTC_BASE;
- unsigned long flags;
- struct rtc_time wtime;
- void __user *argp = (void __user *)arg;
-
- switch (cmd) {
- case RTC_RD_TIME: /* Read the time/date from RTC */
- {
- local_irq_save(flags);
- /* Ensure clock and real-time-mode-register are accessible */
- rtc->ctrl = RTC_READ;
- memset(&wtime, 0, sizeof(struct rtc_time));
- wtime.tm_sec = bcd2bin(rtc->bcd_sec);
- wtime.tm_min = bcd2bin(rtc->bcd_min);
- wtime.tm_hour = bcd2bin(rtc->bcd_hr);
- wtime.tm_mday = bcd2bin(rtc->bcd_dom);
- wtime.tm_mon = bcd2bin(rtc->bcd_mth)-1;
- wtime.tm_year = bcd2bin(rtc->bcd_year);
- if (wtime.tm_year < 70)
- wtime.tm_year += 100;
- wtime.tm_wday = bcd2bin(rtc->bcd_dow)-1;
- rtc->ctrl = 0;
- local_irq_restore(flags);
- return copy_to_user(argp, &wtime, sizeof wtime) ?
- -EFAULT : 0;
- }
- case RTC_SET_TIME: /* Set the RTC */
- {
- struct rtc_time rtc_tm;
- unsigned char mon, day, hrs, min, sec, leap_yr;
- unsigned int yrs;
-
- if (!capable(CAP_SYS_ADMIN))
- return -EACCES;
-
- if (copy_from_user(&rtc_tm, argp, sizeof(struct rtc_time)))
- return -EFAULT;
-
- yrs = rtc_tm.tm_year;
- if (yrs < 1900)
- yrs += 1900;
- mon = rtc_tm.tm_mon + 1; /* tm_mon starts at zero */
- day = rtc_tm.tm_mday;
- hrs = rtc_tm.tm_hour;
- min = rtc_tm.tm_min;
- sec = rtc_tm.tm_sec;
-
- leap_yr = ((!(yrs % 4) && (yrs % 100)) || !(yrs % 400));
-
- if ((mon > 12) || (day == 0))
- return -EINVAL;
-
- if (day > (days_in_mo[mon] + ((mon == 2) && leap_yr)))
- return -EINVAL;
-
- if ((hrs >= 24) || (min >= 60) || (sec >= 60))
- return -EINVAL;
-
- if (yrs >= 2070)
- return -EINVAL;
-
- local_irq_save(flags);
- rtc->ctrl = RTC_WRITE;
-
- rtc->bcd_sec = bin2bcd(sec);
- rtc->bcd_min = bin2bcd(min);
- rtc->bcd_hr = bin2bcd(hrs);
- rtc->bcd_dom = bin2bcd(day);
- rtc->bcd_mth = bin2bcd(mon);
- rtc->bcd_year = bin2bcd(yrs%100);
-
- rtc->ctrl = 0;
- local_irq_restore(flags);
- return 0;
- }
- default:
- return -EINVAL;
- }
-}
-
-/*
- * We enforce only one user at a time here with the open/close.
- */
-static int rtc_open(struct inode *inode, struct file *file)
-{
- if( !atomic_dec_and_test(&rtc_ready) )
- {
- atomic_inc( &rtc_ready );
- return -EBUSY;
- }
- return 0;
-}
-
-static int rtc_release(struct inode *inode, struct file *file)
-{
- atomic_inc( &rtc_ready );
- return 0;
-}
-
-/*
- * The various file operations we support.
- */
-
-static const struct file_operations rtc_fops = {
- .unlocked_ioctl = rtc_ioctl,
- .open = rtc_open,
- .release = rtc_release,
- .llseek = noop_llseek,
-};
-
-static struct miscdevice rtc_dev=
-{
- .minor = RTC_MINOR,
- .name = "rtc",
- .fops = &rtc_fops
-};
-
-static int __init rtc_MK48T08_init(void)
-{
- if (!MACH_IS_MVME16x)
- return -ENODEV;
-
- pr_info("MK48T08 Real Time Clock Driver v%s\n", RTC_VERSION);
- return misc_register(&rtc_dev);
-}
-device_initcall(rtc_MK48T08_init);
--
2.39.5
^ permalink raw reply related [flat|nested] 7+ messages in thread* [PATCH v3 1/2] rtc: m48t59: Use platform_data struct for year offset value
2024-10-08 8:51 [PATCH v3 0/2] MVME: Adopt standard RTC driver Finn Thain
2024-10-08 8:51 ` [PATCH v3 2/2] m68k: mvme147, mvme16x: Adopt rtc-m48t59 platform driver Finn Thain
@ 2024-10-08 8:51 ` Finn Thain
2024-10-08 9:19 ` Geert Uytterhoeven
2024-11-06 0:03 ` [PATCH v3 0/2] MVME: Adopt standard RTC driver Finn Thain
2 siblings, 1 reply; 7+ messages in thread
From: Finn Thain @ 2024-10-08 8:51 UTC (permalink / raw)
To: David S. Miller, Andreas Larsson, Alexandre Belloni
Cc: Daniel Palmer, Michael Pavone, linux-m68k, linux-rtc, sparclinux,
linux-kernel
Instead of hard-coded values and ifdefs, store the year offset in the
platform_data struct.
Tested-by: Daniel Palmer <daniel@0x0f.com>
Signed-off-by: Finn Thain <fthain@linux-m68k.org>
---
I tested this for regressions using qemu-system-sparc64.
Also, Daniel tested the RTC functionality on his MVME147 system.
Changed since v2:
- Use an int for the year offset in struct m48t59_plat_data.
---
arch/sparc/kernel/time_32.c | 1 +
arch/sparc/kernel/time_64.c | 1 +
drivers/rtc/rtc-m48t59.c | 26 ++++----------------------
include/linux/rtc/m48t59.h | 3 +++
4 files changed, 9 insertions(+), 22 deletions(-)
diff --git a/arch/sparc/kernel/time_32.c b/arch/sparc/kernel/time_32.c
index 08bbdc458596..578fd0d49f30 100644
--- a/arch/sparc/kernel/time_32.c
+++ b/arch/sparc/kernel/time_32.c
@@ -255,6 +255,7 @@ static void mostek_write_byte(struct device *dev, u32 ofs, u8 val)
static struct m48t59_plat_data m48t59_data = {
.read_byte = mostek_read_byte,
.write_byte = mostek_write_byte,
+ .yy_offset = 68,
};
/* resource is set at runtime */
diff --git a/arch/sparc/kernel/time_64.c b/arch/sparc/kernel/time_64.c
index 60f1c8cc5363..b32f27f929d1 100644
--- a/arch/sparc/kernel/time_64.c
+++ b/arch/sparc/kernel/time_64.c
@@ -544,6 +544,7 @@ static void mostek_write_byte(struct device *dev, u32 ofs, u8 val)
static struct m48t59_plat_data m48t59_data = {
.read_byte = mostek_read_byte,
.write_byte = mostek_write_byte,
+ .yy_offset = 68,
};
static struct platform_device m48t59_rtc = {
diff --git a/drivers/rtc/rtc-m48t59.c b/drivers/rtc/rtc-m48t59.c
index f0f6b9b6daec..4c339fb45b5c 100644
--- a/drivers/rtc/rtc-m48t59.c
+++ b/drivers/rtc/rtc-m48t59.c
@@ -71,7 +71,7 @@ static int m48t59_rtc_read_time(struct device *dev, struct rtc_time *tm)
/* Issue the READ command */
M48T59_SET_BITS(M48T59_CNTL_READ, M48T59_CNTL);
- tm->tm_year = bcd2bin(M48T59_READ(M48T59_YEAR));
+ tm->tm_year = bcd2bin(M48T59_READ(M48T59_YEAR)) + pdata->yy_offset;
/* tm_mon is 0-11 */
tm->tm_mon = bcd2bin(M48T59_READ(M48T59_MONTH)) - 1;
tm->tm_mday = bcd2bin(M48T59_READ(M48T59_MDAY));
@@ -82,10 +82,6 @@ static int m48t59_rtc_read_time(struct device *dev, struct rtc_time *tm)
dev_dbg(dev, "Century bit is enabled\n");
tm->tm_year += 100; /* one century */
}
-#ifdef CONFIG_SPARC
- /* Sun SPARC machines count years since 1968 */
- tm->tm_year += 68;
-#endif
tm->tm_wday = bcd2bin(val & 0x07);
tm->tm_hour = bcd2bin(M48T59_READ(M48T59_HOUR) & 0x3F);
@@ -106,12 +102,7 @@ static int m48t59_rtc_set_time(struct device *dev, struct rtc_time *tm)
struct m48t59_private *m48t59 = dev_get_drvdata(dev);
unsigned long flags;
u8 val = 0;
- int year = tm->tm_year;
-
-#ifdef CONFIG_SPARC
- /* Sun SPARC machines count years since 1968 */
- year -= 68;
-#endif
+ int year = tm->tm_year - pdata->yy_offset;
dev_dbg(dev, "RTC set time %04d-%02d-%02d %02d/%02d/%02d\n",
year + 1900, tm->tm_mon, tm->tm_mday,
@@ -162,11 +153,7 @@ static int m48t59_rtc_readalarm(struct device *dev, struct rtc_wkalrm *alrm)
/* Issue the READ command */
M48T59_SET_BITS(M48T59_CNTL_READ, M48T59_CNTL);
- tm->tm_year = bcd2bin(M48T59_READ(M48T59_YEAR));
-#ifdef CONFIG_SPARC
- /* Sun SPARC machines count years since 1968 */
- tm->tm_year += 68;
-#endif
+ tm->tm_year = bcd2bin(M48T59_READ(M48T59_YEAR)) + pdata->yy_offset;
/* tm_mon is 0-11 */
tm->tm_mon = bcd2bin(M48T59_READ(M48T59_MONTH)) - 1;
@@ -197,12 +184,7 @@ static int m48t59_rtc_setalarm(struct device *dev, struct rtc_wkalrm *alrm)
struct rtc_time *tm = &alrm->time;
u8 mday, hour, min, sec;
unsigned long flags;
- int year = tm->tm_year;
-
-#ifdef CONFIG_SPARC
- /* Sun SPARC machines count years since 1968 */
- year -= 68;
-#endif
+ int year = tm->tm_year - pdata->yy_offset;
/* If no irq, we don't support ALARM */
if (m48t59->irq == NO_IRQ)
diff --git a/include/linux/rtc/m48t59.h b/include/linux/rtc/m48t59.h
index 9465d5405fe2..373ba77071c6 100644
--- a/include/linux/rtc/m48t59.h
+++ b/include/linux/rtc/m48t59.h
@@ -56,6 +56,9 @@ struct m48t59_plat_data {
void __iomem *ioaddr;
/* offset to RTC registers, automatically set according to the type */
unsigned int offset;
+
+ /* YY digits (in RTC) are offset, i.e. year is 1900 + yy_offset + YY */
+ int yy_offset;
};
#endif /* _LINUX_RTC_M48T59_H_ */
--
2.39.5
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