arm: at91: Add a header file for the real-time clock

Add register definitions for the AT91 RTC so that this can potentially be
used in U-Boot.

Signed-off-by: Andre Renaud <andre@designa-electronics.com>
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Heiko Schocher <hs@denx.de>
Reviewed-by: Andreas Bießmann <andreas@biessmann.org>

diff --git a/arch/arm/mach-at91/include/mach/at91_rtc.h b/arch/arm/mach-at91/include/mach/at91_rtc.h
new file mode 100644 (file)
index 0000000..73070e3
--- /dev/null
+++ b/arch/arm/mach-at91/include/mach/at91_rtc.h
@@ -0,0 +1,71 @@
+/*
+ * Copyright (C) 2005 Ivan Kokshaysky
+ * Copyright (C) SAN People
+ *
+ * Real Time Clock (RTC) - System peripheral registers.
+ * Based on AT91RM9200 datasheet revision E.
+ *
+ * SPDX-License-Identifier:    GPL-2.0+
+ */
+
+#ifndef AT91_RTC_H
+#define AT91_RTC_H
+
+/* Control Register */
+#define AT91_RTC_CR            (ATMEL_BASE_RTC + 0x00)
+#define AT91_RTC_UPDTIM                (1 <<  0)       /* Update Request Time */
+#define AT91_RTC_UPDCAL                (1 <<  1)       /* Update Request Calendar */
+#define AT91_RTC_TIMEVSEL      (3 <<  8)       /* Time Event Selection */
+#define AT91_RTC_TIMEVSEL_MINUTE (0 << 8)
+#define AT91_RTC_TIMEVSEL_HOUR (1 << 8)
+#define AT91_RTC_TIMEVSEL_DAY24        (2 << 8)
+#define AT91_RTC_TIMEVSEL_DAY12        (3 << 8)
+#define AT91_RTC_CALEVSEL      (3 << 16)       /* Calendar Event Selection */
+#define AT91_RTC_CALEVSEL_WEEK (0 << 16)
+#define AT91_RTC_CALEVSEL_MONTH        (1 << 16)
+#define AT91_RTC_CALEVSEL_YEAR (2 << 16)
+
+#define AT91_RTC_MR            (ATMEL_BASE_RTC + 0x04) /* Mode Register */
+#define AT91_RTC_HRMOD         (1 <<  0)               /* 12/24 Hour Mode */
+
+#define AT91_RTC_TIMR          (ATMEL_BASE_RTC + 0x08) /* Time Register */
+#define AT91_RTC_SEC           (0x7f <<  0)            /* Current Second */
+#define AT91_RTC_MIN           (0x7f <<  8)            /* Current Minute */
+#define AT91_RTC_HOUR          (0x3f << 16)            /* Current Hour */
+#define AT91_RTC_AMPM          (1    << 22)            /* AM/PM */
+
+#define AT91_RTC_CALR          (ATMEL_BASE_RTC + 0x0c) /* Calendar Register */
+#define AT91_RTC_CENT          (0x7f <<  0)            /* Current Century */
+#define AT91_RTC_YEAR          (0xff <<  8)            /* Current Year */
+#define AT91_RTC_MONTH         (0x1f << 16)            /* Current Month */
+#define AT91_RTC_DAY           (7    << 21)            /* Current Day */
+#define AT91_RTC_DATE          (0x3f << 24)            /* Current Date */
+
+#define AT91_RTC_TIMALR                (ATMEL_BASE_RTC + 0x10) /* Time Alarm */
+#define AT91_RTC_SECEN         (1 <<  7)               /* Second Alarm Enab */
+#define AT91_RTC_MINEN         (1 << 15)               /* Minute Alarm Enab */
+#define AT91_RTC_HOUREN                (1 << 23)               /* Hour Alarm Enable */
+
+#define AT91_RTC_CALALR                (ATMEL_BASE_RTC + 0x14) /* Calendar Alarm */
+#define AT91_RTC_MTHEN         (1 << 23)               /* Month Alarm Enable */
+#define AT91_RTC_DATEEN                (1 << 31)               /* Date Alarm Enable */
+
+#define AT91_RTC_SR            (ATMEL_BASE_RTC + 0x18) /* Status Register */
+#define AT91_RTC_ACKUPD                (1 <<  0)               /* Ack for Update */
+#define AT91_RTC_ALARM         (1 <<  1)               /* Alarm Flag */
+#define AT91_RTC_SECEV         (1 <<  2)               /* Second Event */
+#define AT91_RTC_TIMEV         (1 <<  3)               /* Time Event */
+#define AT91_RTC_CALEV         (1 <<  4)               /* Calendar Event */
+
+#define AT91_RTC_SCCR          (ATMEL_BASE_RTC + 0x1c) /* Status Clear Cmd */
+#define AT91_RTC_IER           (ATMEL_BASE_RTC + 0x20) /* Interrupt Enable */
+#define AT91_RTC_IDR           (ATMEL_BASE_RTC + 0x24) /* Interrupt Disable */
+#define AT91_RTC_IMR           (ATMEL_BASE_RTC + 0x28) /* Interrupt Mask */
+
+#define AT91_RTC_VER           (ATMEL_BASE_RTC + 0x2c) /* Valid Entry */
+#define AT91_RTC_NVTIM         (1 <<  0)               /* Non-valid Time */
+#define AT91_RTC_NVCAL         (1 <<  1)               /* Non-valid Calendar */
+#define AT91_RTC_NVTIMALR      (1 <<  2)               /* .. Time Alarm */
+#define AT91_RTC_NVCALALR      (1 <<  3)               /* .. Calendar Alarm */
+
+#endif