ralink: update patches

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

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@37016 3c298f89-4303-0410-b956-a3cf2f4a3e73

1 files changed, 259 insertions, 0 deletions

diff --git a/target/linux/ramips/patches-3.9/0142-clocksource-MIPS-ralink-add-support-for-systick-time.patch b/target/linux/ramips/patches-3.9/0142-clocksource-MIPS-ralink-add-support-for-systick-time.patch
new file mode 100644
index 0000000000..a17c160355
--- /dev/null
+++ b/target/linux/ramips/patches-3.9/0142-clocksource-MIPS-ralink-add-support-for-systick-time.patch
@@ -0,0 +1,259 @@
+From bc350a91da176ae8573c0755c66f5ee1911495bc Mon Sep 17 00:00:00 2001
+From: John Crispin <blogic@openwrt.org>
+Date: Tue, 30 Apr 2013 12:35:50 +0200
+Subject: [PATCH 142/164] clocksource: MIPS: ralink: add support for systick
+ timer found on newer ralink SoC
+
+Signed-off-by: John Crispin <blogic@openwrt.org>
+---
+ arch/mips/ralink/Kconfig          |    2 +
+ arch/mips/ralink/clk.c            |    1 +
+ drivers/clocksource/Kconfig       |    6 ++
+ drivers/clocksource/Makefile      |    1 +
+ drivers/clocksource/cevt-rt3352.c |  162 +++++++++++++++++++++++++++++++++++++
+ include/linux/clocksource.h       |    1 +
+ 6 files changed, 173 insertions(+)
+ create mode 100644 drivers/clocksource/cevt-rt3352.c
+
+diff --git a/arch/mips/ralink/Kconfig b/arch/mips/ralink/Kconfig
+index 38540a4..3fe032c 100644
+--- a/arch/mips/ralink/Kconfig
++++ b/arch/mips/ralink/Kconfig
+@@ -14,6 +14,7 @@ choice
+ 		select USB_ARCH_HAS_HCD
+ 		select USB_ARCH_HAS_OHCI
+ 		select USB_ARCH_HAS_EHCI
++		select CLKEVT_RT3352
+ 
+ 	config SOC_RT3883
+ 		bool "RT3883"
+@@ -22,6 +23,7 @@ choice
+ 
+ 	config SOC_MT7620
+ 		bool "MT7620"
++		select CLKEVT_RT3352
+ 
+ endchoice
+ 
+diff --git a/arch/mips/ralink/clk.c b/arch/mips/ralink/clk.c
+index 8dfa22f..bba0cdf 100644
+--- a/arch/mips/ralink/clk.c
++++ b/arch/mips/ralink/clk.c
+@@ -69,4 +69,5 @@ void __init plat_time_init(void)
+ 	pr_info("CPU Clock: %ldMHz\n", clk_get_rate(clk) / 1000000);
+ 	mips_hpt_frequency = clk_get_rate(clk) / 2;
+ 	clk_put(clk);
++	clocksource_of_init();
+ }
+diff --git a/drivers/clocksource/Kconfig b/drivers/clocksource/Kconfig
+index e507ab7..1216c16 100644
+--- a/drivers/clocksource/Kconfig
++++ b/drivers/clocksource/Kconfig
+@@ -7,6 +7,12 @@ config CLKSRC_I8253
+ config CLKEVT_I8253
+ 	bool
+ 
++config CLKEVT_RT3352
++	bool
++	depends on MIPS && RALINK
++	select CLKSRC_OF
++	select CLKSRC_MMIO
++
+ config I8253_LOCK
+ 	bool
+ 
+diff --git a/drivers/clocksource/Makefile b/drivers/clocksource/Makefile
+index 4d8283a..db47a4e 100644
+--- a/drivers/clocksource/Makefile
++++ b/drivers/clocksource/Makefile
+@@ -10,6 +10,7 @@ obj-$(CONFIG_SH_TIMER_TMU)	+= sh_tmu.o
+ obj-$(CONFIG_EM_TIMER_STI)	+= em_sti.o
+ obj-$(CONFIG_CLKBLD_I8253)	+= i8253.o
+ obj-$(CONFIG_CLKSRC_MMIO)	+= mmio.o
++obj-$(CONFIG_CLKEVT_RT3352)	+= cevt-rt3352.o
+ obj-$(CONFIG_DW_APB_TIMER)	+= dw_apb_timer.o
+ obj-$(CONFIG_DW_APB_TIMER_OF)	+= dw_apb_timer_of.o
+ obj-$(CONFIG_CLKSRC_NOMADIK_MTU)	+= nomadik-mtu.o
+diff --git a/drivers/clocksource/cevt-rt3352.c b/drivers/clocksource/cevt-rt3352.c
+new file mode 100644
+index 0000000..bd50edd
+--- /dev/null
++++ b/drivers/clocksource/cevt-rt3352.c
+@@ -0,0 +1,162 @@
++/*
++ * 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/of.h>
++#include <linux/of_irq.h>
++#include <linux/of_address.h>
++
++#include <asm/mach-ralink/ralink_regs.h>
++#include <asm/time.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 = container_of(evt, struct systick_device, dev);
++	u32 count;
++
++	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,
++};
++
++/* ugly hack */
++#ifdef CONFIG_SOC_MT7620
++
++#define CLK_LUT_CFG	0x40
++#define SLEEP_EN	BIT(31)
++
++static inline void mt7620_freq_scaling(struct systick_device *sdev, int status)
++{
++	if (sdev->freq_scale == status)
++		return;
++
++	sdev->freq_scale = status;
++
++	pr_info("%s: %s autosleep mode\n", systick.dev.name, (status) ? ("enable") : ("disable"));
++	if (status)
++		rt_sysc_w32(rt_sysc_r32(CLK_LUT_CFG) | SLEEP_EN, CLK_LUT_CFG);
++	else
++		rt_sysc_w32(rt_sysc_r32(CLK_LUT_CFG) & ~SLEEP_EN, CLK_LUT_CFG);
++}
++#else
++static inline void mt7620_freq_scaling(struct systick_device *sdev, int status) {}
++#endif
++
++static void systick_set_clock_mode(enum clock_event_mode mode,
++				struct clock_event_device *evt)
++{
++	struct systick_device *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);
++		mt7620_freq_scaling(sdev, 1);
++		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);
++		mt7620_freq_scaling(sdev, 0);
++		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) {
++		pr_err("%s: of_iomap failed", np->name);
++		return;
++	}
++
++	clocksource_mmio_init(systick.membase + SYSTICK_COUNT, np->name,
++			SYSTICK_FREQ, 301, 16, clocksource_mmio_readl_up);
++
++	systick_irqaction.name = np->name;
++	systick.dev.name = np->name;
++	clockevent_set_clock(&systick.dev, SYSTICK_FREQ);
++	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)
++		panic("%s: request_irq failed", np->name);
++
++	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);
+diff --git a/include/linux/clocksource.h b/include/linux/clocksource.h
+index 27cfda4..08ed5e1 100644
+--- a/include/linux/clocksource.h
++++ b/include/linux/clocksource.h
+@@ -340,6 +340,7 @@ extern void clocksource_of_init(void);
+ 		__used __section(__clksrc_of_table)			\
+ 		 = { .compatible = compat, .data = fn };
+ #else
++static inline void clocksource_of_init(void) {}
+ #define CLOCKSOURCE_OF_DECLARE(name, compat, fn)
+ #endif
+ 
+-- 
+1.7.10.4
+