summaryrefslogtreecommitdiff
path: root/target/linux/ramips/patches-3.8/0079-clocksource-MIPS-ralink-add-support-for-systick-time.patch
diff options
context:
space:
mode:
Diffstat (limited to 'target/linux/ramips/patches-3.8/0079-clocksource-MIPS-ralink-add-support-for-systick-time.patch')
-rw-r--r--target/linux/ramips/patches-3.8/0079-clocksource-MIPS-ralink-add-support-for-systick-time.patch282
1 files changed, 0 insertions, 282 deletions
diff --git a/target/linux/ramips/patches-3.8/0079-clocksource-MIPS-ralink-add-support-for-systick-time.patch b/target/linux/ramips/patches-3.8/0079-clocksource-MIPS-ralink-add-support-for-systick-time.patch
deleted file mode 100644
index 32c96ec..0000000
--- a/target/linux/ramips/patches-3.8/0079-clocksource-MIPS-ralink-add-support-for-systick-time.patch
+++ /dev/null
@@ -1,282 +0,0 @@
-From 4f3ae2a7ee1b1c9b9cab287c828f2ed7b1858495 Mon Sep 17 00:00:00 2001
-From: John Crispin <blogic@openwrt.org>
-Date: Thu, 20 Jun 2013 19:21:52 +0200
-Subject: [PATCH 79/79] clocksource: MIPS: ralink: add support for systick
- timer found on newer ralink SoC
-
-Signed-off-by: John Crispin <blogic@openwrt.org
----
- arch/mips/pci/Makefile.rej | 10 +++
- arch/mips/ralink/Kconfig | 2 +
- arch/mips/ralink/Kconfig.rej | 10 +++
- arch/mips/ralink/clk.c | 1 +
- drivers/clocksource/Kconfig | 6 ++
- drivers/clocksource/Makefile | 1 +
- drivers/clocksource/cevt-rt3352.c | 162 +++++++++++++++++++++++++++++++++++++
- 7 files changed, 192 insertions(+)
- create mode 100644 arch/mips/pci/Makefile.rej
- create mode 100644 arch/mips/ralink/Kconfig.rej
- create mode 100644 drivers/clocksource/cevt-rt3352.c
-
-diff --git a/arch/mips/pci/Makefile.rej b/arch/mips/pci/Makefile.rej
-new file mode 100644
-index 0000000..c5761e8
---- /dev/null
-+++ b/arch/mips/pci/Makefile.rej
-@@ -0,0 +1,10 @@
-+--- arch/mips/pci/Makefile
-++++ arch/mips/pci/Makefile
-+@@ -43,6 +43,7 @@
-+ obj-$(CONFIG_PCI_LANTIQ) += pci-lantiq.o ops-lantiq.o
-+ obj-$(CONFIG_SOC_RT2880) += pci-rt2880.o
-+ obj-$(CONFIG_SOC_RT3883) += pci-rt3883.o
-++obj-$(CONFIG_SOC_MT7620) += pci-mt7620a.o
-+ obj-$(CONFIG_TANBAC_TB0219) += fixup-tb0219.o
-+ obj-$(CONFIG_TANBAC_TB0226) += fixup-tb0226.o
-+ obj-$(CONFIG_TANBAC_TB0287) += fixup-tb0287.o
-diff --git a/arch/mips/ralink/Kconfig b/arch/mips/ralink/Kconfig
-index f89fdf8..c8d5b6c 100644
---- a/arch/mips/ralink/Kconfig
-+++ b/arch/mips/ralink/Kconfig
-@@ -15,6 +15,7 @@ choice
- select USB_ARCH_HAS_HCD
- select USB_ARCH_HAS_OHCI
- select USB_ARCH_HAS_EHCI
-+ select CLKEVT_RT3352
-
- config SOC_RT3883
- bool "RT3883"
-@@ -24,6 +25,7 @@ choice
-
- config SOC_MT7620
- bool "MT7620"
-+ select CLKEVT_RT3352
- select HW_HAS_PCI
-
- endchoice
-diff --git a/arch/mips/ralink/Kconfig.rej b/arch/mips/ralink/Kconfig.rej
-new file mode 100644
-index 0000000..d3a804f
---- /dev/null
-+++ b/arch/mips/ralink/Kconfig.rej
-@@ -0,0 +1,10 @@
-+--- arch/mips/ralink/Kconfig
-++++ arch/mips/ralink/Kconfig
-+@@ -23,6 +24,7 @@
-+
-+ config SOC_MT7620
-+ bool "MT7620"
-++ select CLKEVT_RT3352
-+
-+ endchoice
-+
-diff --git a/arch/mips/ralink/clk.c b/arch/mips/ralink/clk.c
-index 8dfa22f..bba0cdf 100644
---- a/arch/mips/ralink/clk.c
-+++ b/arch/mips/ralink/clk.c
-@@ -69,4 +69,5 @@ void __init plat_time_init(void)
- pr_info("CPU Clock: %ldMHz\n", clk_get_rate(clk) / 1000000);
- mips_hpt_frequency = clk_get_rate(clk) / 2;
- clk_put(clk);
-+ clocksource_of_init();
- }
-diff --git a/drivers/clocksource/Kconfig b/drivers/clocksource/Kconfig
-index a32b7a9..90bed1a 100644
---- a/drivers/clocksource/Kconfig
-+++ b/drivers/clocksource/Kconfig
-@@ -7,6 +7,12 @@ config CLKSRC_I8253
- config CLKEVT_I8253
- bool
-
-+config CLKEVT_RT3352
-+ bool
-+ depends on MIPS && RALINK
-+ select CLKSRC_OF
-+ select CLKSRC_MMIO
-+
- config I8253_LOCK
- bool
-
-diff --git a/drivers/clocksource/Makefile b/drivers/clocksource/Makefile
-index a33f792..5031f82 100644
---- a/drivers/clocksource/Makefile
-+++ b/drivers/clocksource/Makefile
-@@ -10,6 +10,7 @@ obj-$(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);
---
-1.7.10.4
-
generated by cgit v1.1 at 2024-07-03 15:13:44 +0000