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-rw-r--r--target/linux/ramips/patches-3.9/0142-clocksource-MIPS-ralink-add-support-for-systick-time.patch243
1 files changed, 0 insertions, 243 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
deleted file mode 100644
index be45ae4fff..0000000000
--- a/target/linux/ramips/patches-3.9/0142-clocksource-MIPS-ralink-add-support-for-systick-time.patch
+++ /dev/null
@@ -1,243 +0,0 @@
-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
-
---- 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
-
---- 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();
- }
---- 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
-
---- 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
---- /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);
---- 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
-
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