Linux-libre 4.2-gnu

1 files changed, 0 insertions, 385 deletions

diff --git a/arch/arm/mach-imx/time.c b/arch/arm/mach-imx/time.c
deleted file mode 100644
index 15d18e198..000000000
--- a/arch/arm/mach-imx/time.c
+++ /dev/null
@@ -1,385 +0,0 @@
-/*
- *  linux/arch/arm/plat-mxc/time.c
- *
- *  Copyright (C) 2000-2001 Deep Blue Solutions
- *  Copyright (C) 2002 Shane Nay (shane@minirl.com)
- *  Copyright (C) 2006-2007 Pavel Pisa (ppisa@pikron.com)
- *  Copyright (C) 2008 Juergen Beisert (kernel@pengutronix.de)
- *
- * 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., 51 Franklin Street, Fifth Floor, Boston,
- * MA 02110-1301, USA.
- */
-
-#include <linux/interrupt.h>
-#include <linux/irq.h>
-#include <linux/clockchips.h>
-#include <linux/clk.h>
-#include <linux/delay.h>
-#include <linux/err.h>
-#include <linux/sched_clock.h>
-#include <linux/of.h>
-#include <linux/of_address.h>
-#include <linux/of_irq.h>
-
-#include <asm/mach/time.h>
-
-#include "common.h"
-#include "hardware.h"
-
-/*
- * There are 2 versions of the timer hardware on Freescale MXC hardware.
- * Version 1: MX1/MXL, MX21, MX27.
- * Version 2: MX25, MX31, MX35, MX37, MX51
- */
-
-/* defines common for all i.MX */
-#define MXC_TCTL		0x00
-#define MXC_TCTL_TEN		(1 << 0) /* Enable module */
-#define MXC_TPRER		0x04
-
-/* MX1, MX21, MX27 */
-#define MX1_2_TCTL_CLK_PCLK1	(1 << 1)
-#define MX1_2_TCTL_IRQEN	(1 << 4)
-#define MX1_2_TCTL_FRR		(1 << 8)
-#define MX1_2_TCMP		0x08
-#define MX1_2_TCN		0x10
-#define MX1_2_TSTAT		0x14
-
-/* MX21, MX27 */
-#define MX2_TSTAT_CAPT		(1 << 1)
-#define MX2_TSTAT_COMP		(1 << 0)
-
-/* MX31, MX35, MX25, MX5, MX6 */
-#define V2_TCTL_WAITEN		(1 << 3) /* Wait enable mode */
-#define V2_TCTL_CLK_IPG		(1 << 6)
-#define V2_TCTL_CLK_PER		(2 << 6)
-#define V2_TCTL_CLK_OSC_DIV8	(5 << 6)
-#define V2_TCTL_FRR		(1 << 9)
-#define V2_TCTL_24MEN		(1 << 10)
-#define V2_TPRER_PRE24M		12
-#define V2_IR			0x0c
-#define V2_TSTAT		0x08
-#define V2_TSTAT_OF1		(1 << 0)
-#define V2_TCN			0x24
-#define V2_TCMP			0x10
-
-#define V2_TIMER_RATE_OSC_DIV8	3000000
-
-#define timer_is_v1()	(cpu_is_mx1() || cpu_is_mx21() || cpu_is_mx27())
-#define timer_is_v2()	(!timer_is_v1())
-
-static struct clock_event_device clockevent_mxc;
-static enum clock_event_mode clockevent_mode = CLOCK_EVT_MODE_UNUSED;
-
-static void __iomem *timer_base;
-
-static inline void gpt_irq_disable(void)
-{
-	unsigned int tmp;
-
-	if (timer_is_v2())
-		__raw_writel(0, timer_base + V2_IR);
-	else {
-		tmp = __raw_readl(timer_base + MXC_TCTL);
-		__raw_writel(tmp & ~MX1_2_TCTL_IRQEN, timer_base + MXC_TCTL);
-	}
-}
-
-static inline void gpt_irq_enable(void)
-{
-	if (timer_is_v2())
-		__raw_writel(1<<0, timer_base + V2_IR);
-	else {
-		__raw_writel(__raw_readl(timer_base + MXC_TCTL) | MX1_2_TCTL_IRQEN,
-			timer_base + MXC_TCTL);
-	}
-}
-
-static void gpt_irq_acknowledge(void)
-{
-	if (timer_is_v1()) {
-		if (cpu_is_mx1())
-			__raw_writel(0, timer_base + MX1_2_TSTAT);
-		else
-			__raw_writel(MX2_TSTAT_CAPT | MX2_TSTAT_COMP,
-				timer_base + MX1_2_TSTAT);
-	} else if (timer_is_v2())
-		__raw_writel(V2_TSTAT_OF1, timer_base + V2_TSTAT);
-}
-
-static void __iomem *sched_clock_reg;
-
-static u64 notrace mxc_read_sched_clock(void)
-{
-	return sched_clock_reg ? __raw_readl(sched_clock_reg) : 0;
-}
-
-static struct delay_timer imx_delay_timer;
-
-static unsigned long imx_read_current_timer(void)
-{
-	return __raw_readl(sched_clock_reg);
-}
-
-static int __init mxc_clocksource_init(struct clk *timer_clk)
-{
-	unsigned int c = clk_get_rate(timer_clk);
-	void __iomem *reg = timer_base + (timer_is_v2() ? V2_TCN : MX1_2_TCN);
-
-	imx_delay_timer.read_current_timer = &imx_read_current_timer;
-	imx_delay_timer.freq = c;
-	register_current_timer_delay(&imx_delay_timer);
-
-	sched_clock_reg = reg;
-
-	sched_clock_register(mxc_read_sched_clock, 32, c);
-	return clocksource_mmio_init(reg, "mxc_timer1", c, 200, 32,
-			clocksource_mmio_readl_up);
-}
-
-/* clock event */
-
-static int mx1_2_set_next_event(unsigned long evt,
-			      struct clock_event_device *unused)
-{
-	unsigned long tcmp;
-
-	tcmp = __raw_readl(timer_base + MX1_2_TCN) + evt;
-
-	__raw_writel(tcmp, timer_base + MX1_2_TCMP);
-
-	return (int)(tcmp - __raw_readl(timer_base + MX1_2_TCN)) < 0 ?
-				-ETIME : 0;
-}
-
-static int v2_set_next_event(unsigned long evt,
-			      struct clock_event_device *unused)
-{
-	unsigned long tcmp;
-
-	tcmp = __raw_readl(timer_base + V2_TCN) + evt;
-
-	__raw_writel(tcmp, timer_base + V2_TCMP);
-
-	return evt < 0x7fffffff &&
-		(int)(tcmp - __raw_readl(timer_base + V2_TCN)) < 0 ?
-				-ETIME : 0;
-}
-
-#ifdef DEBUG
-static const char *clock_event_mode_label[] = {
-	[CLOCK_EVT_MODE_PERIODIC] = "CLOCK_EVT_MODE_PERIODIC",
-	[CLOCK_EVT_MODE_ONESHOT]  = "CLOCK_EVT_MODE_ONESHOT",
-	[CLOCK_EVT_MODE_SHUTDOWN] = "CLOCK_EVT_MODE_SHUTDOWN",
-	[CLOCK_EVT_MODE_UNUSED]   = "CLOCK_EVT_MODE_UNUSED",
-	[CLOCK_EVT_MODE_RESUME]   = "CLOCK_EVT_MODE_RESUME",
-};
-#endif /* DEBUG */
-
-static void mxc_set_mode(enum clock_event_mode mode,
-				struct clock_event_device *evt)
-{
-	unsigned long flags;
-
-	/*
-	 * The timer interrupt generation is disabled at least
-	 * for enough time to call mxc_set_next_event()
-	 */
-	local_irq_save(flags);
-
-	/* Disable interrupt in GPT module */
-	gpt_irq_disable();
-
-	if (mode != clockevent_mode) {
-		/* Set event time into far-far future */
-		if (timer_is_v2())
-			__raw_writel(__raw_readl(timer_base + V2_TCN) - 3,
-					timer_base + V2_TCMP);
-		else
-			__raw_writel(__raw_readl(timer_base + MX1_2_TCN) - 3,
-					timer_base + MX1_2_TCMP);
-
-		/* Clear pending interrupt */
-		gpt_irq_acknowledge();
-	}
-
-#ifdef DEBUG
-	printk(KERN_INFO "mxc_set_mode: changing mode from %s to %s\n",
-		clock_event_mode_label[clockevent_mode],
-		clock_event_mode_label[mode]);
-#endif /* DEBUG */
-
-	/* Remember timer mode */
-	clockevent_mode = mode;
-	local_irq_restore(flags);
-
-	switch (mode) {
-	case CLOCK_EVT_MODE_PERIODIC:
-		printk(KERN_ERR"mxc_set_mode: Periodic mode is not "
-				"supported for i.MX\n");
-		break;
-	case CLOCK_EVT_MODE_ONESHOT:
-	/*
-	 * Do not put overhead of interrupt enable/disable into
-	 * mxc_set_next_event(), the core has about 4 minutes
-	 * to call mxc_set_next_event() or shutdown clock after
-	 * mode switching
-	 */
-		local_irq_save(flags);
-		gpt_irq_enable();
-		local_irq_restore(flags);
-		break;
-	case CLOCK_EVT_MODE_SHUTDOWN:
-	case CLOCK_EVT_MODE_UNUSED:
-	case CLOCK_EVT_MODE_RESUME:
-		/* Left event sources disabled, no more interrupts appear */
-		break;
-	}
-}
-
-/*
- * IRQ handler for the timer
- */
-static irqreturn_t mxc_timer_interrupt(int irq, void *dev_id)
-{
-	struct clock_event_device *evt = &clockevent_mxc;
-	uint32_t tstat;
-
-	if (timer_is_v2())
-		tstat = __raw_readl(timer_base + V2_TSTAT);
-	else
-		tstat = __raw_readl(timer_base + MX1_2_TSTAT);
-
-	gpt_irq_acknowledge();
-
-	evt->event_handler(evt);
-
-	return IRQ_HANDLED;
-}
-
-static struct irqaction mxc_timer_irq = {
-	.name		= "i.MX Timer Tick",
-	.flags		= IRQF_TIMER | IRQF_IRQPOLL,
-	.handler	= mxc_timer_interrupt,
-};
-
-static struct clock_event_device clockevent_mxc = {
-	.name		= "mxc_timer1",
-	.features	= CLOCK_EVT_FEAT_ONESHOT,
-	.set_mode	= mxc_set_mode,
-	.set_next_event	= mx1_2_set_next_event,
-	.rating		= 200,
-};
-
-static int __init mxc_clockevent_init(struct clk *timer_clk)
-{
-	if (timer_is_v2())
-		clockevent_mxc.set_next_event = v2_set_next_event;
-
-	clockevent_mxc.cpumask = cpumask_of(0);
-	clockevents_config_and_register(&clockevent_mxc,
-					clk_get_rate(timer_clk),
-					0xff, 0xfffffffe);
-
-	return 0;
-}
-
-static void __init _mxc_timer_init(int irq,
-				   struct clk *clk_per, struct clk *clk_ipg)
-{
-	uint32_t tctl_val;
-
-	if (IS_ERR(clk_per)) {
-		pr_err("i.MX timer: unable to get clk\n");
-		return;
-	}
-
-	if (!IS_ERR(clk_ipg))
-		clk_prepare_enable(clk_ipg);
-
-	clk_prepare_enable(clk_per);
-
-	/*
-	 * Initialise to a known state (all timers off, and timing reset)
-	 */
-
-	__raw_writel(0, timer_base + MXC_TCTL);
-	__raw_writel(0, timer_base + MXC_TPRER); /* see datasheet note */
-
-	if (timer_is_v2()) {
-		tctl_val = V2_TCTL_FRR | V2_TCTL_WAITEN | MXC_TCTL_TEN;
-		if (clk_get_rate(clk_per) == V2_TIMER_RATE_OSC_DIV8) {
-			tctl_val |= V2_TCTL_CLK_OSC_DIV8;
-			if (cpu_is_imx6dl() || cpu_is_imx6sx()) {
-				/* 24 / 8 = 3 MHz */
-				__raw_writel(7 << V2_TPRER_PRE24M,
-					timer_base + MXC_TPRER);
-				tctl_val |= V2_TCTL_24MEN;
-			}
-		} else {
-			tctl_val |= V2_TCTL_CLK_PER;
-		}
-	} else {
-		tctl_val = MX1_2_TCTL_FRR | MX1_2_TCTL_CLK_PCLK1 | MXC_TCTL_TEN;
-	}
-
-	__raw_writel(tctl_val, timer_base + MXC_TCTL);
-
-	/* init and register the timer to the framework */
-	mxc_clocksource_init(clk_per);
-	mxc_clockevent_init(clk_per);
-
-	/* Make irqs happen */
-	setup_irq(irq, &mxc_timer_irq);
-}
-
-void __init mxc_timer_init(void __iomem *base, int irq)
-{
-	struct clk *clk_per = clk_get_sys("imx-gpt.0", "per");
-	struct clk *clk_ipg = clk_get_sys("imx-gpt.0", "ipg");
-
-	timer_base = base;
-
-	_mxc_timer_init(irq, clk_per, clk_ipg);
-}
-
-static void __init mxc_timer_init_dt(struct device_node *np)
-{
-	struct clk *clk_per, *clk_ipg;
-	int irq;
-
-	if (timer_base)
-		return;
-
-	timer_base = of_iomap(np, 0);
-	WARN_ON(!timer_base);
-	irq = irq_of_parse_and_map(np, 0);
-
-	clk_ipg = of_clk_get_by_name(np, "ipg");
-
-	/* Try osc_per first, and fall back to per otherwise */
-	clk_per = of_clk_get_by_name(np, "osc_per");
-	if (IS_ERR(clk_per))
-		clk_per = of_clk_get_by_name(np, "per");
-
-	_mxc_timer_init(irq, clk_per, clk_ipg);
-}
-CLOCKSOURCE_OF_DECLARE(mx1_timer, "fsl,imx1-gpt", mxc_timer_init_dt);
-CLOCKSOURCE_OF_DECLARE(mx25_timer, "fsl,imx25-gpt", mxc_timer_init_dt);
-CLOCKSOURCE_OF_DECLARE(mx50_timer, "fsl,imx50-gpt", mxc_timer_init_dt);
-CLOCKSOURCE_OF_DECLARE(mx51_timer, "fsl,imx51-gpt", mxc_timer_init_dt);
-CLOCKSOURCE_OF_DECLARE(mx53_timer, "fsl,imx53-gpt", mxc_timer_init_dt);
-CLOCKSOURCE_OF_DECLARE(mx6q_timer, "fsl,imx6q-gpt", mxc_timer_init_dt);
-CLOCKSOURCE_OF_DECLARE(mx6sl_timer, "fsl,imx6sl-gpt", mxc_timer_init_dt);
-CLOCKSOURCE_OF_DECLARE(mx6sx_timer, "fsl,imx6sx-gpt", mxc_timer_init_dt);