diff options
Diffstat (limited to 'target/linux/ramips/patches-3.10/0011-MIPS-ralink-add-support-for-systick-timer-found-on-n.patch')
| -rw-r--r-- | target/linux/ramips/patches-3.10/0011-MIPS-ralink-add-support-for-systick-timer-found-on-n.patch | 192 |
1 files changed, 0 insertions, 192 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 deleted file mode 100644 index 5626ada551..0000000000 --- a/target/linux/ramips/patches-3.10/0011-MIPS-ralink-add-support-for-systick-timer-found-on-n.patch +++ /dev/null @@ -1,192 +0,0 @@ -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 "Systick Clockevent source" -+ 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); |