ARM: at91: remove useless at91_sysirq_mask_rtx

[cascardo/linux.git] / arch / arm / mach-at91 / sysirq_mask.c

diff --git a/arch/arm/mach-at91/sysirq_mask.c b/arch/arm/mach-at91/sysirq_mask.c
deleted file mode 100644 (file)
index f8bc351..0000000
--- a/arch/arm/mach-at91/sysirq_mask.c
+++ /dev/null
@@ -1,75 +0,0 @@
-/*
- * sysirq_mask.c - System-interrupt masking
- *
- * Copyright (C) 2013 Johan Hovold <jhovold@gmail.com>
- *
- * Functions to disable system interrupts from backup-powered peripherals.
- *
- * The RTC and RTT-peripherals are generally powered by backup power (VDDBU)
- * and are not reset on wake-up, user, watchdog or software reset. This means
- * that their interrupts may be enabled during early boot (e.g. after a user
- * reset).
- *
- * As the RTC and RTT share the system-interrupt line with the PIT, an
- * interrupt occurring before a handler has been installed would lead to the
- * system interrupt being disabled and prevent the system from booting.
- *
- * 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.
- */
-
-#include <linux/io.h>
-#include <mach/at91_rtt.h>
-
-#include "generic.h"
-
-#define AT91_RTC_IDR           0x24    /* Interrupt Disable Register */
-#define AT91_RTC_IMR           0x28    /* Interrupt Mask Register */
-#define AT91_RTC_IRQ_MASK      0x1f    /* Available IRQs mask */
-
-void __init at91_sysirq_mask_rtc(u32 rtc_base)
-{
-       void __iomem *base;
-
-       base = ioremap(rtc_base, 64);
-       if (!base)
-               return;
-
-       /*
-        * sam9x5 SoCs have the following errata:
-        * "RTC: Interrupt Mask Register cannot be used
-        *  Interrupt Mask Register read always returns 0."
-        *
-        * Hence we're not relying on IMR values to disable
-        * interrupts.
-        */
-       writel_relaxed(AT91_RTC_IRQ_MASK, base + AT91_RTC_IDR);
-       (void)readl_relaxed(base + AT91_RTC_IMR);       /* flush */
-
-       iounmap(base);
-}
-
-void __init at91_sysirq_mask_rtt(u32 rtt_base)
-{
-       void __iomem *base;
-       void __iomem *reg;
-       u32 mode;
-
-       base = ioremap(rtt_base, 16);
-       if (!base)
-               return;
-
-       reg = base + AT91_RTT_MR;
-
-       mode = readl_relaxed(reg);
-       if (mode & (AT91_RTT_ALMIEN | AT91_RTT_RTTINCIEN)) {
-               pr_info("AT91: Disabling rtt irq\n");
-               mode &= ~(AT91_RTT_ALMIEN | AT91_RTT_RTTINCIEN);
-               writel_relaxed(mode, reg);
-               (void)readl_relaxed(reg);                       /* flush */
-       }
-
-       iounmap(base);
-}