Hi, This patch adds support to arm amba pl031 rtc chip.
User needs to define 3 variables in board config to make use of this
driver & needs to call rtc_init in order to start rtc.
#define CONFIG_RTC_PL031 1 /* use ARM AMBA PL031 RTC */
#define CFG_RTC_PL031_BASE 0x101e8000 /* RTC Registers Base Address */
and
#define CONFIG_CMD_DATE
Call rtc_init from <board>.c to start the rtc as below
#if defined(CONFIG_RTC_PL031) && defined(CONFIG_CMD_DATE)
rtc_init();
#endif
Comments are welcome.
Also,
I used below command to generate the diff.
It says that 31 files have changed in this directory whereas only 1
files is changed and 1 file is added.
Kindly help me to correct the same. Right now i have manually changed it
in the patch file.
$ git-diff -p --summary --stat u-boot-1.3.3/drivers/rtc/
uboot/drivers/rtc/
Regards
Gururaja
Signed off by: Gururaja Hebbar <[EMAIL PROTECTED]>
- Add support to the ARM AMBA PL031 RTC Chip.
- remove the call to rtc_init from lib_arm/board.c boot sequence as per
wd advice.
- check for pl031 rtc initialization. Initialize if it hasnt yet.
{u-boot-1.3.3 => uboot}/drivers/rtc/Makefile | 1 +
/dev/null => uboot/drivers/rtc/rtc_pl031.c | 121
+++++++++++++++++++++
2 files changed, 122 insertions(+), 0 deletions(-)
create mode 100644 uboot/drivers/rtc/rtc_pl031.c
diff --git a/u-boot-1.3.3/drivers/rtc/Makefile
b/uboot/drivers/rtc/Makefile
index 2e0c118..f888a31 100644
--- a/u-boot-1.3.3/drivers/rtc/Makefile
+++ b/uboot/drivers/rtc/Makefile
@@ -56,6 +56,7 @@ COBJS-y += rs5c372.o
COBJS-y += rx8025.o
COBJS-y += s3c24x0_rtc.o
COBJS-y += x1205.o
+COBJS-y += rtc_pl031.o
COBJS := $(COBJS-y)
SRCS := $(COBJS:.o=.c)
diff --git a/dev/null b/uboot/drivers/rtc/rtc_pl031.c
new file mode 100644
index 0000000..77b550b
--- /dev/null
+++ b/uboot/drivers/rtc/rtc_pl031.c
@@ -0,0 +1,121 @@
+/*
+ * (C) Copyright 2008
+ * Gururaja Hebbar Sanyo LSI (www.sanyo.co.in) [EMAIL PROTECTED]
+ *
+ * reference linux-2.6.20.6/drivers/rtc/rtc-pl031.c
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+#include <command.h>
+#include <rtc.h>
+
+#if defined(CONFIG_RTC_PL031) && defined(CONFIG_CMD_DATE)
+
+#ifndef CFG_RTC_PL031_BASE
+#error CFG_RTC_PL031_BASE is not defined!
+#endif
+
+/*
+ * Register definitions
+ */
+#define RTC_DR 0x00 /* Data read register */
+#define RTC_MR 0x04 /* Match register */
+#define RTC_LR 0x08 /* Data load register */
+#define RTC_CR 0x0c /* Control register */
+#define RTC_IMSC 0x10 /* Interrupt mask and set
register */
+#define RTC_RIS 0x14 /* Raw interrupt status register
*/
+#define RTC_MIS 0x18 /* Masked interrupt status
register */
+#define RTC_ICR 0x1c /* Interrupt clear register */
+
+#define RTC_CR_MIE (1 << 0)
+
+#define RTC_WRITE_REG(addr, val) (*(volatile unsigned int
*)(CFG_RTC_PL031_BASE + (addr)) = (val))
+#define RTC_READ_REG(addr) (*(volatile unsigned int
*)(CFG_RTC_PL031_BASE + (addr)))
+
+static int pl031_initted = 0;
+
+/* Enable RTC Start in Control register*/
+void rtc_init(void)
+{
+ RTC_WRITE_REG(RTC_CR,RTC_CR_MIE);
+
+ pl031_initted = 1;
+}
+
+/*
+ * Reset the RTC. We set the date back to 1970-01-01.
+ */
+void rtc_reset(void)
+{
+ RTC_WRITE_REG(RTC_LR,0x00);
+ if(!pl031_initted)
+ rtc_init();
+}
+
+/*
+ * Set the RTC
+*/
+void rtc_set(struct rtc_time *tmp)
+{
+ unsigned long tim;
+
+ if(!pl031_initted)
+ rtc_init();
+
+ if (tmp == NULL) {
+ puts("Error setting the date/time\n");
+ return;
+ }
+
+ /* Calculate number of seconds this incoming time represents */
+ tim = mktime(tmp->tm_year, tmp->tm_mon, tmp->tm_mday,
+ tmp->tm_hour, tmp->tm_min, tmp->tm_sec);
+
+ RTC_WRITE_REG(RTC_LR,tim);
+}
+
+/*
+ * Get the current time from the RTC
+ */
+int rtc_get(struct rtc_time *tmp)
+{
+ ulong tim;
+
+ if(!pl031_initted)
+ rtc_init();
+
+ if (tmp == NULL) {
+ puts("Error getting the date/time\n");
+ return -1;
+ }
+
+ tim = RTC_READ_REG(RTC_DR);
+
+ to_tm (tim, tmp);
+
+ debug ( "Get DATE: %4d-%02d-%02d (wday=%d) TIME:
%2d:%02d:%02d\n",
+ tmp->tm_year, tmp->tm_mon, tmp->tm_mday, tmp->tm_wday,
+ tmp->tm_hour, tmp->tm_min, tmp->tm_sec);
+
+ return 0;
+}
+
+#endif
add_arm_amba_pl031_rtc_v2.patch
Description: add_arm_amba_pl031_rtc_v2.patch
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