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authorLinus Torvalds <torvalds@linux-foundation.org>2015-06-26 12:20:00 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2015-06-26 12:20:00 -0700
commite8a0b37d28ace440776c0a4fe3c65f5832a9a7ee (patch)
tree9475608c22849e5039d4dc00d3f8e3a30eeac2b9 /arch/arm/common/timer-sp.c
parentabea9629486cf973369a641e190e739b3010bb03 (diff)
parent002af195a8c720ca47c7884fd0390f3b327423b9 (diff)
Merge branch 'for-linus' of git://ftp.arm.linux.org.uk/~rmk/linux-arm
Pull ARM updates from Russell King: "Bigger items included in this update are: - A series of updates from Arnd for ARM randconfig build failures - Updates from Dmitry for StrongARM SA-1100 to move IRQ handling to drivers/irqchip/ - Move ARMs SP804 timer to drivers/clocksource/ - Perf updates from Mark Rutland in preparation to move the ARM perf code into drivers/ so it can be shared with ARM64. - MCPM updates from Nicolas - Add support for taking platform serial number from DT - Re-implement Keystone2 physical address space switch to conform to architecture requirements - Clean up ARMv7 LPAE code, which goes in hand with the Keystone2 changes. - L2C cleanups to avoid unlocking caches if we're prevented by the secure support to unlock. - Avoid cleaning a potentially dirty cache containing stale data on CPU initialisation - Add ARM-only entry point for secondary startup (for machines that can only call into a Thumb kernel in ARM mode). Same thing is also done for the resume entry point. - Provide arch_irqs_disabled via asm-generic - Enlarge ARMv7M vector table - Always use BFD linker for VDSO, as gold doesn't accept some of the options we need. - Fix an incorrect BSYM (for Thumb symbols) usage, and convert all BSYM compiler macros to a "badr" (for branch address). - Shut up compiler warnings provoked by our cmpxchg() implementation. - Ensure bad xchg sizes fail to link" * 'for-linus' of git://ftp.arm.linux.org.uk/~rmk/linux-arm: (75 commits) ARM: Fix build if CLKDEV_LOOKUP is not configured ARM: fix new BSYM() usage introduced via for-arm-soc branch ARM: 8383/1: nommu: avoid deprecated source register on mov ARM: 8391/1: l2c: add options to overwrite prefetching behavior ARM: 8390/1: irqflags: Get arch_irqs_disabled from asm-generic ARM: 8387/1: arm/mm/dma-mapping.c: Add arm_coherent_dma_mmap ARM: 8388/1: tcm: Don't crash when TCM banks are protected by TrustZone ARM: 8384/1: VDSO: force use of BFD linker ARM: 8385/1: VDSO: group link options ARM: cmpxchg: avoid warnings from macro-ized cmpxchg() implementations ARM: remove __bad_xchg definition ARM: 8369/1: ARMv7M: define size of vector table for Vybrid ARM: 8382/1: clocksource: make ARM_TIMER_SP804 depend on GENERIC_SCHED_CLOCK ARM: 8366/1: move Dual-Timer SP804 driver to drivers/clocksource ARM: 8365/1: introduce sp804_timer_disable and remove arm_timer.h inclusion ARM: 8364/1: fix BE32 module loading ARM: 8360/1: add secondary_startup_arm prototype in header file ARM: 8359/1: correct secondary_startup_arm mode ARM: proc-v7: sanitise and document registers around errata ARM: proc-v7: clean up MIDR access ...
Diffstat (limited to 'arch/arm/common/timer-sp.c')
-rw-r--r--arch/arm/common/timer-sp.c304
1 files changed, 0 insertions, 304 deletions
diff --git a/arch/arm/common/timer-sp.c b/arch/arm/common/timer-sp.c
deleted file mode 100644
index 19211324772f..000000000000
--- a/arch/arm/common/timer-sp.c
+++ /dev/null
@@ -1,304 +0,0 @@
-/*
- * linux/arch/arm/common/timer-sp.c
- *
- * Copyright (C) 1999 - 2003 ARM Limited
- * Copyright (C) 2000 Deep Blue Solutions Ltd
- *
- * 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 <linux/clk.h>
-#include <linux/clocksource.h>
-#include <linux/clockchips.h>
-#include <linux/err.h>
-#include <linux/interrupt.h>
-#include <linux/irq.h>
-#include <linux/io.h>
-#include <linux/of.h>
-#include <linux/of_address.h>
-#include <linux/of_irq.h>
-#include <linux/sched_clock.h>
-
-#include <asm/hardware/arm_timer.h>
-#include <asm/hardware/timer-sp.h>
-
-static long __init sp804_get_clock_rate(struct clk *clk)
-{
- long rate;
- int err;
-
- err = clk_prepare(clk);
- if (err) {
- pr_err("sp804: clock failed to prepare: %d\n", err);
- clk_put(clk);
- return err;
- }
-
- err = clk_enable(clk);
- if (err) {
- pr_err("sp804: clock failed to enable: %d\n", err);
- clk_unprepare(clk);
- clk_put(clk);
- return err;
- }
-
- rate = clk_get_rate(clk);
- if (rate < 0) {
- pr_err("sp804: clock failed to get rate: %ld\n", rate);
- clk_disable(clk);
- clk_unprepare(clk);
- clk_put(clk);
- }
-
- return rate;
-}
-
-static void __iomem *sched_clock_base;
-
-static u64 notrace sp804_read(void)
-{
- return ~readl_relaxed(sched_clock_base + TIMER_VALUE);
-}
-
-void __init __sp804_clocksource_and_sched_clock_init(void __iomem *base,
- const char *name,
- struct clk *clk,
- int use_sched_clock)
-{
- long rate;
-
- if (!clk) {
- clk = clk_get_sys("sp804", name);
- if (IS_ERR(clk)) {
- pr_err("sp804: clock not found: %d\n",
- (int)PTR_ERR(clk));
- return;
- }
- }
-
- rate = sp804_get_clock_rate(clk);
-
- if (rate < 0)
- return;
-
- /* setup timer 0 as free-running clocksource */
- writel(0, base + TIMER_CTRL);
- writel(0xffffffff, base + TIMER_LOAD);
- writel(0xffffffff, base + TIMER_VALUE);
- writel(TIMER_CTRL_32BIT | TIMER_CTRL_ENABLE | TIMER_CTRL_PERIODIC,
- base + TIMER_CTRL);
-
- clocksource_mmio_init(base + TIMER_VALUE, name,
- rate, 200, 32, clocksource_mmio_readl_down);
-
- if (use_sched_clock) {
- sched_clock_base = base;
- sched_clock_register(sp804_read, 32, rate);
- }
-}
-
-
-static void __iomem *clkevt_base;
-static unsigned long clkevt_reload;
-
-/*
- * IRQ handler for the timer
- */
-static irqreturn_t sp804_timer_interrupt(int irq, void *dev_id)
-{
- struct clock_event_device *evt = dev_id;
-
- /* clear the interrupt */
- writel(1, clkevt_base + TIMER_INTCLR);
-
- evt->event_handler(evt);
-
- return IRQ_HANDLED;
-}
-
-static void sp804_set_mode(enum clock_event_mode mode,
- struct clock_event_device *evt)
-{
- unsigned long ctrl = TIMER_CTRL_32BIT | TIMER_CTRL_IE;
-
- writel(ctrl, clkevt_base + TIMER_CTRL);
-
- switch (mode) {
- case CLOCK_EVT_MODE_PERIODIC:
- writel(clkevt_reload, clkevt_base + TIMER_LOAD);
- ctrl |= TIMER_CTRL_PERIODIC | TIMER_CTRL_ENABLE;
- break;
-
- case CLOCK_EVT_MODE_ONESHOT:
- /* period set, and timer enabled in 'next_event' hook */
- ctrl |= TIMER_CTRL_ONESHOT;
- break;
-
- case CLOCK_EVT_MODE_UNUSED:
- case CLOCK_EVT_MODE_SHUTDOWN:
- default:
- break;
- }
-
- writel(ctrl, clkevt_base + TIMER_CTRL);
-}
-
-static int sp804_set_next_event(unsigned long next,
- struct clock_event_device *evt)
-{
- unsigned long ctrl = readl(clkevt_base + TIMER_CTRL);
-
- writel(next, clkevt_base + TIMER_LOAD);
- writel(ctrl | TIMER_CTRL_ENABLE, clkevt_base + TIMER_CTRL);
-
- return 0;
-}
-
-static struct clock_event_device sp804_clockevent = {
- .features = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT |
- CLOCK_EVT_FEAT_DYNIRQ,
- .set_mode = sp804_set_mode,
- .set_next_event = sp804_set_next_event,
- .rating = 300,
-};
-
-static struct irqaction sp804_timer_irq = {
- .name = "timer",
- .flags = IRQF_TIMER | IRQF_IRQPOLL,
- .handler = sp804_timer_interrupt,
- .dev_id = &sp804_clockevent,
-};
-
-void __init __sp804_clockevents_init(void __iomem *base, unsigned int irq, struct clk *clk, const char *name)
-{
- struct clock_event_device *evt = &sp804_clockevent;
- long rate;
-
- if (!clk)
- clk = clk_get_sys("sp804", name);
- if (IS_ERR(clk)) {
- pr_err("sp804: %s clock not found: %d\n", name,
- (int)PTR_ERR(clk));
- return;
- }
-
- rate = sp804_get_clock_rate(clk);
- if (rate < 0)
- return;
-
- clkevt_base = base;
- clkevt_reload = DIV_ROUND_CLOSEST(rate, HZ);
- evt->name = name;
- evt->irq = irq;
- evt->cpumask = cpu_possible_mask;
-
- writel(0, base + TIMER_CTRL);
-
- setup_irq(irq, &sp804_timer_irq);
- clockevents_config_and_register(evt, rate, 0xf, 0xffffffff);
-}
-
-static void __init sp804_of_init(struct device_node *np)
-{
- static bool initialized = false;
- void __iomem *base;
- int irq;
- u32 irq_num = 0;
- struct clk *clk1, *clk2;
- const char *name = of_get_property(np, "compatible", NULL);
-
- base = of_iomap(np, 0);
- if (WARN_ON(!base))
- return;
-
- /* Ensure timers are disabled */
- writel(0, base + TIMER_CTRL);
- writel(0, base + TIMER_2_BASE + TIMER_CTRL);
-
- if (initialized || !of_device_is_available(np))
- goto err;
-
- clk1 = of_clk_get(np, 0);
- if (IS_ERR(clk1))
- clk1 = NULL;
-
- /* Get the 2nd clock if the timer has 3 timer clocks */
- if (of_count_phandle_with_args(np, "clocks", "#clock-cells") == 3) {
- clk2 = of_clk_get(np, 1);
- if (IS_ERR(clk2)) {
- pr_err("sp804: %s clock not found: %d\n", np->name,
- (int)PTR_ERR(clk2));
- clk2 = NULL;
- }
- } else
- clk2 = clk1;
-
- irq = irq_of_parse_and_map(np, 0);
- if (irq <= 0)
- goto err;
-
- of_property_read_u32(np, "arm,sp804-has-irq", &irq_num);
- if (irq_num == 2) {
- __sp804_clockevents_init(base + TIMER_2_BASE, irq, clk2, name);
- __sp804_clocksource_and_sched_clock_init(base, name, clk1, 1);
- } else {
- __sp804_clockevents_init(base, irq, clk1 , name);
- __sp804_clocksource_and_sched_clock_init(base + TIMER_2_BASE,
- name, clk2, 1);
- }
- initialized = true;
-
- return;
-err:
- iounmap(base);
-}
-CLOCKSOURCE_OF_DECLARE(sp804, "arm,sp804", sp804_of_init);
-
-static void __init integrator_cp_of_init(struct device_node *np)
-{
- static int init_count = 0;
- void __iomem *base;
- int irq;
- const char *name = of_get_property(np, "compatible", NULL);
- struct clk *clk;
-
- base = of_iomap(np, 0);
- if (WARN_ON(!base))
- return;
- clk = of_clk_get(np, 0);
- if (WARN_ON(IS_ERR(clk)))
- return;
-
- /* Ensure timer is disabled */
- writel(0, base + TIMER_CTRL);
-
- if (init_count == 2 || !of_device_is_available(np))
- goto err;
-
- if (!init_count)
- __sp804_clocksource_and_sched_clock_init(base, name, clk, 0);
- else {
- irq = irq_of_parse_and_map(np, 0);
- if (irq <= 0)
- goto err;
-
- __sp804_clockevents_init(base, irq, clk, name);
- }
-
- init_count++;
- return;
-err:
- iounmap(base);
-}
-CLOCKSOURCE_OF_DECLARE(intcp, "arm,integrator-cp-timer", integrator_cp_of_init);