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authorLinus Torvalds <torvalds@linux-foundation.org>2016-01-24 12:50:56 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2016-01-24 12:50:56 -0800
commite2464688b59c6ae9928f385dabf5355e30cff298 (patch)
tree1039fa8c818e6ac16d6f1504c28e80bfe902b0f3 /arch/mips/pic32/pic32mzda/time.c
parente1c10879ed59436cde537b723545430b04d4dec0 (diff)
parent07d17f09691e549fac0101333eebe0161a472b50 (diff)
downloadlinux-stericsson-e2464688b59c6ae9928f385dabf5355e30cff298.tar.gz
Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus
Pull MIPS updates from Ralf Baechle: "This is the main pull request for MIPS for 4.5 plus some 4.4 fixes. The executive summary: - ATH79 platform improvments, use DT bindings for the ATH79 USB PHY. - Avoid useless rebuilds for zboot. - jz4780: Add NEMC, BCH and NAND device tree nodes - Initial support for the MicroChip's DT platform. As all the device drivers are missing this is still of limited use. - Some Loongson3 cleanups. - The unavoidable whitespace polishing. - Reduce clock skew when synchronizing the CPU cycle counters on CPU startup. - Add MIPS R6 fixes. - Lots of cleanups across arch/mips as fallout from KVM. - Lots of minor fixes and changes for IEEE 754-2008 support to the FPU emulator / fp-assist software. - Minor Ralink, BCM47xx and bcm963xx platform support improvments. - Support SMP on BCM63168" * 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus: (84 commits) MIPS: zboot: Add support for serial debug using the PROM MIPS: zboot: Avoid useless rebuilds MIPS: BMIPS: Enable ARCH_WANT_OPTIONAL_GPIOLIB MIPS: bcm63xx: nvram: Remove unused bcm63xx_nvram_get_psi_size() function MIPS: bcm963xx: Update bcm_tag field image_sequence MIPS: bcm963xx: Move extended flash address to bcm_tag header file MIPS: bcm963xx: Move Broadcom BCM963xx image tag data structure MIPS: bcm63xx: nvram: Use nvram structure definition from header file MIPS: bcm963xx: Add Broadcom BCM963xx board nvram data structure MAINTAINERS: Add KVM for MIPS entry MIPS: KVM: Add missing newline to kvm_err() MIPS: Move KVM specific opcodes into asm/inst.h MIPS: KVM: Use cacheops.h definitions MIPS: Break down cacheops.h definitions MIPS: Use EXCCODE_ constants with set_except_vector() MIPS: Update trap codes MIPS: Move Cause.ExcCode trap codes to mipsregs.h MIPS: KVM: Make kvm_mips_{init,exit}() static MIPS: KVM: Refactor added offsetof()s MIPS: KVM: Convert EXPORT_SYMBOL to _GPL ...
Diffstat (limited to 'arch/mips/pic32/pic32mzda/time.c')
-rw-r--r--arch/mips/pic32/pic32mzda/time.c73
1 files changed, 73 insertions, 0 deletions
diff --git a/arch/mips/pic32/pic32mzda/time.c b/arch/mips/pic32/pic32mzda/time.c
new file mode 100644
index 000000000000..ca6a62bb10db
--- /dev/null
+++ b/arch/mips/pic32/pic32mzda/time.c
@@ -0,0 +1,73 @@
+/*
+ * Joshua Henderson <joshua.henderson@microchip.com>
+ * Copyright (C) 2015 Microchip Technology Inc. All rights reserved.
+ *
+ * This program is free software; you can distribute it and/or modify it
+ * under the terms of the GNU General Public License (Version 2) as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope 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.
+ */
+#include <linux/clk.h>
+#include <linux/clk-provider.h>
+#include <linux/clocksource.h>
+#include <linux/init.h>
+#include <linux/of.h>
+#include <linux/of_irq.h>
+#include <linux/irqdomain.h>
+
+#include <asm/time.h>
+
+#include "pic32mzda.h"
+
+static const struct of_device_id pic32_infra_match[] = {
+ { .compatible = "microchip,pic32mzda-infra", },
+ { },
+};
+
+#define DEFAULT_CORE_TIMER_INTERRUPT 0
+
+static unsigned int pic32_xlate_core_timer_irq(void)
+{
+ static struct device_node *node;
+ unsigned int irq;
+
+ node = of_find_matching_node(NULL, pic32_infra_match);
+
+ if (WARN_ON(!node))
+ goto default_map;
+
+ irq = irq_of_parse_and_map(node, 0);
+ if (!irq)
+ goto default_map;
+
+ return irq;
+
+default_map:
+
+ return irq_create_mapping(NULL, DEFAULT_CORE_TIMER_INTERRUPT);
+}
+
+unsigned int get_c0_compare_int(void)
+{
+ return pic32_xlate_core_timer_irq();
+}
+
+void __init plat_time_init(void)
+{
+ struct clk *clk;
+
+ of_clk_init(NULL);
+ clk = clk_get_sys("cpu_clk", NULL);
+ if (IS_ERR(clk))
+ panic("unable to get CPU clock, err=%ld", PTR_ERR(clk));
+
+ clk_prepare_enable(clk);
+ pr_info("CPU Clock: %ldMHz\n", clk_get_rate(clk) / 1000000);
+ mips_hpt_frequency = clk_get_rate(clk) / 2;
+
+ clocksource_probe();
+}