Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc

Merge sparc bug fixes that didn't make it into v3.9 into
sparc-next.

Signed-off-by: David S. Miller <davem@davemloft.net>

5 files changed, 6 insertions, 328 deletions

diff --git a/arch/arm/mach-zynq/Kconfig b/arch/arm/mach-zynq/Kconfig
index adb6c0ea0e53..cf3226b041f5 100644
--- a/arch/arm/mach-zynq/Kconfig
+++ b/arch/arm/mach-zynq/Kconfig
@@ -5,9 +5,12 @@ config ARCH_ZYNQ
 	select COMMON_CLK
 	select CPU_V7
 	select GENERIC_CLOCKEVENTS
+	select HAVE_ARM_SCU if SMP
+	select HAVE_ARM_TWD if LOCAL_TIMERS
 	select ICST
 	select MIGHT_HAVE_CACHE_L2X0
 	select USE_OF
 	select SPARSE_IRQ
+	select CADENCE_TTC_TIMER
 	help
 	  Support for Xilinx Zynq ARM Cortex A9 Platform
diff --git a/arch/arm/mach-zynq/Makefile b/arch/arm/mach-zynq/Makefile
index 397268c1b250..320faedeb484 100644
--- a/arch/arm/mach-zynq/Makefile
+++ b/arch/arm/mach-zynq/Makefile
@@ -3,4 +3,4 @@
 #
 
 # Common support
-obj-y				:= common.o timer.o
+obj-y				:= common.o
diff --git a/arch/arm/mach-zynq/common.c b/arch/arm/mach-zynq/common.c
index 5c8983218183..68e0907de5d0 100644
--- a/arch/arm/mach-zynq/common.c
+++ b/arch/arm/mach-zynq/common.c
@@ -20,6 +20,7 @@
 #include <linux/platform_device.h>
 #include <linux/clk.h>
 #include <linux/clk/zynq.h>
+#include <linux/clocksource.h>
 #include <linux/of_address.h>
 #include <linux/of_irq.h>
 #include <linux/of_platform.h>
@@ -77,7 +78,7 @@ static void __init xilinx_zynq_timer_init(void)
 
 	xilinx_zynq_clocks_init(slcr);
 
-	xttcps_timer_init();
+	clocksource_of_init();
 }
 
 /**
diff --git a/arch/arm/mach-zynq/common.h b/arch/arm/mach-zynq/common.h
index 8b4dbbaa01cf..5050bb10bb12 100644
--- a/arch/arm/mach-zynq/common.h
+++ b/arch/arm/mach-zynq/common.h
@@ -17,6 +17,4 @@
 #ifndef __MACH_ZYNQ_COMMON_H__
 #define __MACH_ZYNQ_COMMON_H__
 
-void __init xttcps_timer_init(void);
-
 #endif
diff --git a/arch/arm/mach-zynq/timer.c b/arch/arm/mach-zynq/timer.c
deleted file mode 100644
index f9fbc9c1e7a6..000000000000
--- a/arch/arm/mach-zynq/timer.c
+++ /dev/null
@@ -1,324 +0,0 @@
-/*
- * This file contains driver for the Xilinx PS Timer Counter IP.
- *
- *  Copyright (C) 2011 Xilinx
- *
- * based on arch/mips/kernel/time.c timer driver
- *
- * This software is licensed under the terms of the GNU General Public
- * License version 2, as published by the Free Software Foundation, and
- * may be copied, distributed, and modified under those terms.
- *
- * 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.
- */
-
-#include <linux/interrupt.h>
-#include <linux/clockchips.h>
-#include <linux/of_address.h>
-#include <linux/of_irq.h>
-#include <linux/slab.h>
-#include <linux/clk-provider.h>
-#include "common.h"
-
-/*
- * Timer Register Offset Definitions of Timer 1, Increment base address by 4
- * and use same offsets for Timer 2
- */
-#define XTTCPS_CLK_CNTRL_OFFSET		0x00 /* Clock Control Reg, RW */
-#define XTTCPS_CNT_CNTRL_OFFSET		0x0C /* Counter Control Reg, RW */
-#define XTTCPS_COUNT_VAL_OFFSET		0x18 /* Counter Value Reg, RO */
-#define XTTCPS_INTR_VAL_OFFSET		0x24 /* Interval Count Reg, RW */
-#define XTTCPS_ISR_OFFSET		0x54 /* Interrupt Status Reg, RO */
-#define XTTCPS_IER_OFFSET		0x60 /* Interrupt Enable Reg, RW */
-
-#define XTTCPS_CNT_CNTRL_DISABLE_MASK	0x1
-
-/*
- * Setup the timers to use pre-scaling, using a fixed value for now that will
- * work across most input frequency, but it may need to be more dynamic
- */
-#define PRESCALE_EXPONENT	11	/* 2 ^ PRESCALE_EXPONENT = PRESCALE */
-#define PRESCALE		2048	/* The exponent must match this */
-#define CLK_CNTRL_PRESCALE	((PRESCALE_EXPONENT - 1) << 1)
-#define CLK_CNTRL_PRESCALE_EN	1
-#define CNT_CNTRL_RESET		(1<<4)
-
-/**
- * struct xttcps_timer - This definition defines local timer structure
- *
- * @base_addr:	Base address of timer
- **/
-struct xttcps_timer {
-	void __iomem	*base_addr;
-};
-
-struct xttcps_timer_clocksource {
-	struct xttcps_timer	xttc;
-	struct clocksource	cs;
-};
-
-#define to_xttcps_timer_clksrc(x) \
-		container_of(x, struct xttcps_timer_clocksource, cs)
-
-struct xttcps_timer_clockevent {
-	struct xttcps_timer		xttc;
-	struct clock_event_device	ce;
-	struct clk			*clk;
-};
-
-#define to_xttcps_timer_clkevent(x) \
-		container_of(x, struct xttcps_timer_clockevent, ce)
-
-/**
- * xttcps_set_interval - Set the timer interval value
- *
- * @timer:	Pointer to the timer instance
- * @cycles:	Timer interval ticks
- **/
-static void xttcps_set_interval(struct xttcps_timer *timer,
-					unsigned long cycles)
-{
-	u32 ctrl_reg;
-
-	/* Disable the counter, set the counter value  and re-enable counter */
-	ctrl_reg = __raw_readl(timer->base_addr + XTTCPS_CNT_CNTRL_OFFSET);
-	ctrl_reg |= XTTCPS_CNT_CNTRL_DISABLE_MASK;
-	__raw_writel(ctrl_reg, timer->base_addr + XTTCPS_CNT_CNTRL_OFFSET);
-
-	__raw_writel(cycles, timer->base_addr + XTTCPS_INTR_VAL_OFFSET);
-
-	/*
-	 * Reset the counter (0x10) so that it starts from 0, one-shot
-	 * mode makes this needed for timing to be right.
-	 */
-	ctrl_reg |= CNT_CNTRL_RESET;
-	ctrl_reg &= ~XTTCPS_CNT_CNTRL_DISABLE_MASK;
-	__raw_writel(ctrl_reg, timer->base_addr + XTTCPS_CNT_CNTRL_OFFSET);
-}
-
-/**
- * xttcps_clock_event_interrupt - Clock event timer interrupt handler
- *
- * @irq:	IRQ number of the Timer
- * @dev_id:	void pointer to the xttcps_timer instance
- *
- * returns: Always IRQ_HANDLED - success
- **/
-static irqreturn_t xttcps_clock_event_interrupt(int irq, void *dev_id)
-{
-	struct xttcps_timer_clockevent *xttce = dev_id;
-	struct xttcps_timer *timer = &xttce->xttc;
-
-	/* Acknowledge the interrupt and call event handler */
-	__raw_readl(timer->base_addr + XTTCPS_ISR_OFFSET);
-
-	xttce->ce.event_handler(&xttce->ce);
-
-	return IRQ_HANDLED;
-}
-
-/**
- * __xttc_clocksource_read - Reads the timer counter register
- *
- * returns: Current timer counter register value
- **/
-static cycle_t __xttc_clocksource_read(struct clocksource *cs)
-{
-	struct xttcps_timer *timer = &to_xttcps_timer_clksrc(cs)->xttc;
-
-	return (cycle_t)__raw_readl(timer->base_addr +
-				XTTCPS_COUNT_VAL_OFFSET);
-}
-
-/**
- * xttcps_set_next_event - Sets the time interval for next event
- *
- * @cycles:	Timer interval ticks
- * @evt:	Address of clock event instance
- *
- * returns: Always 0 - success
- **/
-static int xttcps_set_next_event(unsigned long cycles,
-					struct clock_event_device *evt)
-{
-	struct xttcps_timer_clockevent *xttce = to_xttcps_timer_clkevent(evt);
-	struct xttcps_timer *timer = &xttce->xttc;
-
-	xttcps_set_interval(timer, cycles);
-	return 0;
-}
-
-/**
- * xttcps_set_mode - Sets the mode of timer
- *
- * @mode:	Mode to be set
- * @evt:	Address of clock event instance
- **/
-static void xttcps_set_mode(enum clock_event_mode mode,
-					struct clock_event_device *evt)
-{
-	struct xttcps_timer_clockevent *xttce = to_xttcps_timer_clkevent(evt);
-	struct xttcps_timer *timer = &xttce->xttc;
-	u32 ctrl_reg;
-
-	switch (mode) {
-	case CLOCK_EVT_MODE_PERIODIC:
-		xttcps_set_interval(timer,
-				     DIV_ROUND_CLOSEST(clk_get_rate(xttce->clk),
-						       PRESCALE * HZ));
-		break;
-	case CLOCK_EVT_MODE_ONESHOT:
-	case CLOCK_EVT_MODE_UNUSED:
-	case CLOCK_EVT_MODE_SHUTDOWN:
-		ctrl_reg = __raw_readl(timer->base_addr +
-					XTTCPS_CNT_CNTRL_OFFSET);
-		ctrl_reg |= XTTCPS_CNT_CNTRL_DISABLE_MASK;
-		__raw_writel(ctrl_reg,
-				timer->base_addr + XTTCPS_CNT_CNTRL_OFFSET);
-		break;
-	case CLOCK_EVT_MODE_RESUME:
-		ctrl_reg = __raw_readl(timer->base_addr +
-					XTTCPS_CNT_CNTRL_OFFSET);
-		ctrl_reg &= ~XTTCPS_CNT_CNTRL_DISABLE_MASK;
-		__raw_writel(ctrl_reg,
-				timer->base_addr + XTTCPS_CNT_CNTRL_OFFSET);
-		break;
-	}
-}
-
-static void __init zynq_ttc_setup_clocksource(struct device_node *np,
-					     void __iomem *base)
-{
-	struct xttcps_timer_clocksource *ttccs;
-	struct clk *clk;
-	int err;
-	u32 reg;
-
-	ttccs = kzalloc(sizeof(*ttccs), GFP_KERNEL);
-	if (WARN_ON(!ttccs))
-		return;
-
-	err = of_property_read_u32(np, "reg", &reg);
-	if (WARN_ON(err))
-		return;
-
-	clk = of_clk_get_by_name(np, "cpu_1x");
-	if (WARN_ON(IS_ERR(clk)))
-		return;
-
-	err = clk_prepare_enable(clk);
-	if (WARN_ON(err))
-		return;
-
-	ttccs->xttc.base_addr = base + reg * 4;
-
-	ttccs->cs.name = np->name;
-	ttccs->cs.rating = 200;
-	ttccs->cs.read = __xttc_clocksource_read;
-	ttccs->cs.mask = CLOCKSOURCE_MASK(16);
-	ttccs->cs.flags = CLOCK_SOURCE_IS_CONTINUOUS;
-
-	__raw_writel(0x0,  ttccs->xttc.base_addr + XTTCPS_IER_OFFSET);
-	__raw_writel(CLK_CNTRL_PRESCALE | CLK_CNTRL_PRESCALE_EN,
-		     ttccs->xttc.base_addr + XTTCPS_CLK_CNTRL_OFFSET);
-	__raw_writel(CNT_CNTRL_RESET,
-		     ttccs->xttc.base_addr + XTTCPS_CNT_CNTRL_OFFSET);
-
-	err = clocksource_register_hz(&ttccs->cs, clk_get_rate(clk) / PRESCALE);
-	if (WARN_ON(err))
-		return;
-}
-
-static void __init zynq_ttc_setup_clockevent(struct device_node *np,
-					    void __iomem *base)
-{
-	struct xttcps_timer_clockevent *ttcce;
-	int err, irq;
-	u32 reg;
-
-	ttcce = kzalloc(sizeof(*ttcce), GFP_KERNEL);
-	if (WARN_ON(!ttcce))
-		return;
-
-	err = of_property_read_u32(np, "reg", &reg);
-	if (WARN_ON(err))
-		return;
-
-	ttcce->xttc.base_addr = base + reg * 4;
-
-	ttcce->clk = of_clk_get_by_name(np, "cpu_1x");
-	if (WARN_ON(IS_ERR(ttcce->clk)))
-		return;
-
-	err = clk_prepare_enable(ttcce->clk);
-	if (WARN_ON(err))
-		return;
-
-	irq = irq_of_parse_and_map(np, 0);
-	if (WARN_ON(!irq))
-		return;
-
-	ttcce->ce.name = np->name;
-	ttcce->ce.features = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT;
-	ttcce->ce.set_next_event = xttcps_set_next_event;
-	ttcce->ce.set_mode = xttcps_set_mode;
-	ttcce->ce.rating = 200;
-	ttcce->ce.irq = irq;
-	ttcce->ce.cpumask = cpu_possible_mask;
-
-	__raw_writel(0x23, ttcce->xttc.base_addr + XTTCPS_CNT_CNTRL_OFFSET);
-	__raw_writel(CLK_CNTRL_PRESCALE | CLK_CNTRL_PRESCALE_EN,
-		     ttcce->xttc.base_addr + XTTCPS_CLK_CNTRL_OFFSET);
-	__raw_writel(0x1,  ttcce->xttc.base_addr + XTTCPS_IER_OFFSET);
-
-	err = request_irq(irq, xttcps_clock_event_interrupt, IRQF_TIMER,
-			  np->name, ttcce);
-	if (WARN_ON(err))
-		return;
-
-	clockevents_config_and_register(&ttcce->ce,
-					clk_get_rate(ttcce->clk) / PRESCALE,
-					1, 0xfffe);
-}
-
-static const __initconst struct of_device_id zynq_ttc_match[] = {
-	{ .compatible = "xlnx,ttc-counter-clocksource",
-		.data = zynq_ttc_setup_clocksource, },
-	{ .compatible = "xlnx,ttc-counter-clockevent",
-		.data = zynq_ttc_setup_clockevent, },
-	{}
-};
-
-/**
- * xttcps_timer_init - Initialize the timer
- *
- * Initializes the timer hardware and register the clock source and clock event
- * timers with Linux kernal timer framework
- **/
-void __init xttcps_timer_init(void)
-{
-	struct device_node *np;
-
-	for_each_compatible_node(np, NULL, "xlnx,ttc") {
-		struct device_node *np_chld;
-		void __iomem *base;
-
-		base = of_iomap(np, 0);
-		if (WARN_ON(!base))
-			return;
-
-		for_each_available_child_of_node(np, np_chld) {
-			int (*cb)(struct device_node *np, void __iomem *base);
-			const struct of_device_id *match;
-
-			match = of_match_node(zynq_ttc_match, np_chld);
-			if (match) {
-				cb = match->data;
-				cb(np_chld, base);
-			}
-		}
-	}
-}