ramips: update v3.10 patches

Sync the patches with those sent upstream for v3.12.

Signed-off-by: John Crispin <blogic@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@37778 3c298f89-4303-0410-b956-a3cf2f4a3e73

1 files changed, 192 insertions, 0 deletions

diff --git a/target/linux/ramips/patches-3.10/0011-MIPS-ralink-add-support-for-systick-timer-found-on-n.patch b/target/linux/ramips/patches-3.10/0011-MIPS-ralink-add-support-for-systick-timer-found-on-n.patch
new file mode 100644
index 0000000000..6d4911b428
--- /dev/null
+++ b/target/linux/ramips/patches-3.10/0011-MIPS-ralink-add-support-for-systick-timer-found-on-n.patch
@@ -0,0 +1,192 @@
+From 3b511d972b556712f89ccc68825c0ec8f398dc5c Mon Sep 17 00:00:00 2001
+From: John Crispin <blogic@openwrt.org>
+Date: Sun, 28 Jul 2013 13:46:09 +0200
+Subject: [PATCH 11/25] MIPS: ralink: add support for systick timer found on
+ newer ralink SoC
+
+Newer Ralink SoC (MT7620x and RT5350) have a 50KHz clock that runs independent
+of the SoC master clock. If we want to automatic frequency scaling to work we
+need to use the systick timer as the clock source.
+
+Signed-off-by: John Crispin <blogic@openwrt.org>
+---
+ arch/mips/ralink/Kconfig       |    7 ++
+ arch/mips/ralink/Makefile      |    2 +
+ arch/mips/ralink/cevt-rt3352.c |  145 ++++++++++++++++++++++++++++++++++++++++
+ 3 files changed, 154 insertions(+)
+ create mode 100644 arch/mips/ralink/cevt-rt3352.c
+
+--- a/arch/mips/ralink/Kconfig
++++ b/arch/mips/ralink/Kconfig
+@@ -1,5 +1,12 @@
+ if RALINK
+ 
++config CLKEVT_RT3352
++	bool
++	depends on SOC_RT305X || SOC_MT7620
++	default y
++	select CLKSRC_OF
++	select CLKSRC_MMIO
++
+ choice
+ 	prompt "Ralink SoC selection"
+ 	default SOC_RT305X
+--- a/arch/mips/ralink/Makefile
++++ b/arch/mips/ralink/Makefile
+@@ -8,6 +8,8 @@
+ 
+ obj-y := prom.o of.o reset.o clk.o irq.o timer.o
+ 
++obj-$(CONFIG_CLKEVT_RT3352) += cevt-rt3352.o
++
+ obj-$(CONFIG_SOC_RT288X) += rt288x.o
+ obj-$(CONFIG_SOC_RT305X) += rt305x.o
+ obj-$(CONFIG_SOC_RT3883) += rt3883.o
+--- /dev/null
++++ b/arch/mips/ralink/cevt-rt3352.c
+@@ -0,0 +1,145 @@
++/*
++ * This file is subject to the terms and conditions of the GNU General Public
++ * License.  See the file "COPYING" in the main directory of this archive
++ * for more details.
++ *
++ * Copyright (C) 2013 by John Crispin <blogic@openwrt.org>
++ */
++
++#include <linux/clockchips.h>
++#include <linux/clocksource.h>
++#include <linux/interrupt.h>
++#include <linux/reset.h>
++#include <linux/init.h>
++#include <linux/time.h>
++#include <linux/of.h>
++#include <linux/of_irq.h>
++#include <linux/of_address.h>
++
++#include <asm/mach-ralink/ralink_regs.h>
++
++#define SYSTICK_FREQ		(50 * 1000)
++
++#define SYSTICK_CONFIG		0x00
++#define SYSTICK_COMPARE		0x04
++#define SYSTICK_COUNT		0x08
++
++/* route systick irq to mips irq 7 instead of the r4k-timer */
++#define CFG_EXT_STK_EN		0x2
++/* enable the counter */
++#define CFG_CNT_EN		0x1
++
++struct systick_device {
++	void __iomem *membase;
++	struct clock_event_device dev;
++	int irq_requested;
++	int freq_scale;
++};
++
++static void systick_set_clock_mode(enum clock_event_mode mode,
++				struct clock_event_device *evt);
++
++static int systick_next_event(unsigned long delta,
++				struct clock_event_device *evt)
++{
++	struct systick_device *sdev;
++	u32 count;
++
++	sdev = container_of(evt, struct systick_device, dev);
++	count = ioread32(sdev->membase + SYSTICK_COUNT);
++	count = (count + delta) % SYSTICK_FREQ;
++	iowrite32(count + delta, sdev->membase + SYSTICK_COMPARE);
++
++	return 0;
++}
++
++static void systick_event_handler(struct clock_event_device *dev)
++{
++	/* noting to do here */
++}
++
++static irqreturn_t systick_interrupt(int irq, void *dev_id)
++{
++	struct clock_event_device *dev = (struct clock_event_device *) dev_id;
++
++	dev->event_handler(dev);
++
++	return IRQ_HANDLED;
++}
++
++static struct systick_device systick = {
++	.dev = {
++		/*
++		 * cevt-r4k uses 300, make sure systick
++		 * gets used if available
++		 */
++		.rating		= 310,
++		.features	= CLOCK_EVT_FEAT_ONESHOT,
++		.set_next_event	= systick_next_event,
++		.set_mode	= systick_set_clock_mode,
++		.event_handler	= systick_event_handler,
++	},
++};
++
++static struct irqaction systick_irqaction = {
++	.handler = systick_interrupt,
++	.flags = IRQF_PERCPU | IRQF_TIMER,
++	.dev_id = &systick.dev,
++};
++
++static void systick_set_clock_mode(enum clock_event_mode mode,
++				struct clock_event_device *evt)
++{
++	struct systick_device *sdev;
++
++	sdev = container_of(evt, struct systick_device, dev);
++
++	switch (mode) {
++	case CLOCK_EVT_MODE_ONESHOT:
++		if (!sdev->irq_requested)
++			setup_irq(systick.dev.irq, &systick_irqaction);
++		sdev->irq_requested = 1;
++		iowrite32(CFG_EXT_STK_EN | CFG_CNT_EN,
++				systick.membase + SYSTICK_CONFIG);
++		break;
++
++	case CLOCK_EVT_MODE_SHUTDOWN:
++		if (sdev->irq_requested)
++			free_irq(systick.dev.irq, &systick_irqaction);
++		sdev->irq_requested = 0;
++		iowrite32(0, systick.membase + SYSTICK_CONFIG);
++		break;
++
++	default:
++		pr_err("%s: Unhandeled mips clock_mode\n", systick.dev.name);
++		break;
++	}
++}
++
++static void __init ralink_systick_init(struct device_node *np)
++{
++	systick.membase = of_iomap(np, 0);
++	if (!systick.membase)
++		return;
++
++	systick_irqaction.name = np->name;
++	systick.dev.name = np->name;
++	clockevents_calc_mult_shift(&systick.dev, SYSTICK_FREQ, 60);
++	systick.dev.max_delta_ns = clockevent_delta2ns(0x7fff, &systick.dev);
++	systick.dev.min_delta_ns = clockevent_delta2ns(0x3, &systick.dev);
++	systick.dev.irq = irq_of_parse_and_map(np, 0);
++	if (!systick.dev.irq) {
++		pr_err("%s: request_irq failed", np->name);
++		return;
++	}
++
++	clocksource_mmio_init(systick.membase + SYSTICK_COUNT, np->name,
++			SYSTICK_FREQ, 301, 16, clocksource_mmio_readl_up);
++
++	clockevents_register_device(&systick.dev);
++
++	pr_info("%s: runing - mult: %d, shift: %d\n",
++			np->name, systick.dev.mult, systick.dev.shift);
++}
++
++CLOCKSOURCE_OF_DECLARE(systick, "ralink,cevt-systick", ralink_systick_init);