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author | John Crispin <john@openwrt.org> | 2013-08-14 18:15:15 +0000 |
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committer | John Crispin <john@openwrt.org> | 2013-08-14 18:15:15 +0000 |
commit | 9e5b0cc19cebf6ed876c7eace13b887b46e518c0 (patch) | |
tree | f246f12adca3e91f5e3708e97c7a4add05cc0ce3 /target/linux/ramips/patches-3.10/0003-MIPS-ralink-add-support-for-periodic-timer-irq.patch | |
parent | 2864fb107f00531df0b114d52334d3e00fa5d6c2 (diff) | |
download | upstream-9e5b0cc19cebf6ed876c7eace13b887b46e518c0.tar.gz upstream-9e5b0cc19cebf6ed876c7eace13b887b46e518c0.tar.bz2 upstream-9e5b0cc19cebf6ed876c7eace13b887b46e518c0.zip |
ramips: update v3.10 patches
Sync the patches with those sent upstream for v3.12.
Signed-off-by: John Crispin <blogic@openwrt.org>
SVN-Revision: 37778
Diffstat (limited to 'target/linux/ramips/patches-3.10/0003-MIPS-ralink-add-support-for-periodic-timer-irq.patch')
-rw-r--r-- | target/linux/ramips/patches-3.10/0003-MIPS-ralink-add-support-for-periodic-timer-irq.patch | 220 |
1 files changed, 0 insertions, 220 deletions
diff --git a/target/linux/ramips/patches-3.10/0003-MIPS-ralink-add-support-for-periodic-timer-irq.patch b/target/linux/ramips/patches-3.10/0003-MIPS-ralink-add-support-for-periodic-timer-irq.patch deleted file mode 100644 index 5436750d68..0000000000 --- a/target/linux/ramips/patches-3.10/0003-MIPS-ralink-add-support-for-periodic-timer-irq.patch +++ /dev/null @@ -1,220 +0,0 @@ -From 298e990777004a6a72b1c95af5a2cd984c56135d Mon Sep 17 00:00:00 2001 -From: John Crispin <blogic@openwrt.org> -Date: Sat, 23 Mar 2013 19:44:41 +0100 -Subject: [PATCH 03/33] MIPS: ralink: add support for periodic timer irq - -Adds a driver for the periodic timer found on Ralink SoC. - -Signed-off-by: John Crispin <blogic@openwrt.org> ---- - arch/mips/ralink/Makefile | 2 +- - arch/mips/ralink/timer.c | 192 +++++++++++++++++++++++++++++++++++++++++++++ - 2 files changed, 193 insertions(+), 1 deletion(-) - create mode 100644 arch/mips/ralink/timer.c - ---- a/arch/mips/ralink/Makefile -+++ b/arch/mips/ralink/Makefile -@@ -6,7 +6,7 @@ - # Copyright (C) 2009-2011 Gabor Juhos <juhosg@openwrt.org> - # Copyright (C) 2013 John Crispin <blogic@openwrt.org> - --obj-y := prom.o of.o reset.o clk.o irq.o pinmux.o -+obj-y := prom.o of.o reset.o clk.o irq.o pinmux.o timer.o - - obj-$(CONFIG_SOC_RT288X) += rt288x.o - obj-$(CONFIG_SOC_RT305X) += rt305x.o ---- /dev/null -+++ b/arch/mips/ralink/timer.c -@@ -0,0 +1,192 @@ -+/* -+ * This program is free software; you can redistribute it and/or modify it -+ * under the terms of the GNU General Public License version 2 as published -+ * by the Free Software Foundation. -+ * -+ * Copyright (C) 2013 John Crispin <blogic@openwrt.org> -+*/ -+ -+#include <linux/module.h> -+#include <linux/platform_device.h> -+#include <linux/interrupt.h> -+#include <linux/timer.h> -+#include <linux/of_gpio.h> -+#include <linux/clk.h> -+ -+#include <asm/mach-ralink/ralink_regs.h> -+ -+#define TIMER_REG_TMRSTAT 0x00 -+#define TIMER_REG_TMR0LOAD 0x10 -+#define TIMER_REG_TMR0CTL 0x18 -+ -+#define TMRSTAT_TMR0INT BIT(0) -+ -+#define TMR0CTL_ENABLE BIT(7) -+#define TMR0CTL_MODE_PERIODIC BIT(4) -+#define TMR0CTL_PRESCALER 1 -+#define TMR0CTL_PRESCALE_VAL (0xf - TMR0CTL_PRESCALER) -+#define TMR0CTL_PRESCALE_DIV (65536 / BIT(TMR0CTL_PRESCALER)) -+ -+struct rt_timer { -+ struct device *dev; -+ void __iomem *membase; -+ int irq; -+ unsigned long timer_freq; -+ unsigned long timer_div; -+}; -+ -+static inline void rt_timer_w32(struct rt_timer *rt, u8 reg, u32 val) -+{ -+ __raw_writel(val, rt->membase + reg); -+} -+ -+static inline u32 rt_timer_r32(struct rt_timer *rt, u8 reg) -+{ -+ return __raw_readl(rt->membase + reg); -+} -+ -+static irqreturn_t rt_timer_irq(int irq, void *_rt) -+{ -+ struct rt_timer *rt = (struct rt_timer *) _rt; -+ -+ rt_timer_w32(rt, TIMER_REG_TMR0LOAD, rt->timer_freq / rt->timer_div); -+ rt_timer_w32(rt, TIMER_REG_TMRSTAT, TMRSTAT_TMR0INT); -+ -+ return IRQ_HANDLED; -+} -+ -+ -+static int rt_timer_request(struct rt_timer *rt) -+{ -+ int err = request_irq(rt->irq, rt_timer_irq, IRQF_DISABLED, -+ dev_name(rt->dev), rt); -+ if (err) { -+ dev_err(rt->dev, "failed to request irq\n"); -+ } else { -+ u32 t = TMR0CTL_MODE_PERIODIC | TMR0CTL_PRESCALE_VAL; -+ rt_timer_w32(rt, TIMER_REG_TMR0CTL, t); -+ } -+ return err; -+} -+ -+static void rt_timer_free(struct rt_timer *rt) -+{ -+ free_irq(rt->irq, rt); -+} -+ -+static int rt_timer_config(struct rt_timer *rt, unsigned long divisor) -+{ -+ if (rt->timer_freq < divisor) -+ rt->timer_div = rt->timer_freq; -+ else -+ rt->timer_div = divisor; -+ -+ rt_timer_w32(rt, TIMER_REG_TMR0LOAD, rt->timer_freq / rt->timer_div); -+ -+ return 0; -+} -+ -+static int rt_timer_enable(struct rt_timer *rt) -+{ -+ u32 t; -+ -+ rt_timer_w32(rt, TIMER_REG_TMR0LOAD, rt->timer_freq / rt->timer_div); -+ -+ t = rt_timer_r32(rt, TIMER_REG_TMR0CTL); -+ t |= TMR0CTL_ENABLE; -+ rt_timer_w32(rt, TIMER_REG_TMR0CTL, t); -+ -+ return 0; -+} -+ -+static void rt_timer_disable(struct rt_timer *rt) -+{ -+ u32 t; -+ -+ t = rt_timer_r32(rt, TIMER_REG_TMR0CTL); -+ t &= ~TMR0CTL_ENABLE; -+ rt_timer_w32(rt, TIMER_REG_TMR0CTL, t); -+} -+ -+static int rt_timer_probe(struct platform_device *pdev) -+{ -+ struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0); -+ struct rt_timer *rt; -+ struct clk *clk; -+ -+ if (!res) { -+ dev_err(&pdev->dev, "no memory resource found\n"); -+ return -EINVAL; -+ } -+ -+ rt = devm_kzalloc(&pdev->dev, sizeof(*rt), GFP_KERNEL); -+ if (!rt) { -+ dev_err(&pdev->dev, "failed to allocate memory\n"); -+ return -ENOMEM; -+ } -+ -+ rt->irq = platform_get_irq(pdev, 0); -+ if (!rt->irq) { -+ dev_err(&pdev->dev, "failed to load irq\n"); -+ return -ENOENT; -+ } -+ -+ rt->membase = devm_request_and_ioremap(&pdev->dev, res); -+ if (!rt->membase) { -+ dev_err(&pdev->dev, "failed to ioremap\n"); -+ return -ENOMEM; -+ } -+ -+ clk = devm_clk_get(&pdev->dev, NULL); -+ if (IS_ERR(clk)) { -+ dev_err(&pdev->dev, "failed get clock rate\n"); -+ return PTR_ERR(clk); -+ } -+ -+ rt->timer_freq = clk_get_rate(clk) / TMR0CTL_PRESCALE_DIV; -+ if (!rt->timer_freq) -+ return -EINVAL; -+ -+ rt->dev = &pdev->dev; -+ platform_set_drvdata(pdev, rt); -+ -+ rt_timer_request(rt); -+ rt_timer_config(rt, 2); -+ rt_timer_enable(rt); -+ -+ dev_info(&pdev->dev, "maximum frequncy is %luHz\n", rt->timer_freq); -+ -+ return 0; -+} -+ -+static int rt_timer_remove(struct platform_device *pdev) -+{ -+ struct rt_timer *rt = platform_get_drvdata(pdev); -+ -+ rt_timer_disable(rt); -+ rt_timer_free(rt); -+ -+ return 0; -+} -+ -+static const struct of_device_id rt_timer_match[] = { -+ { .compatible = "ralink,rt2880-timer" }, -+ {}, -+}; -+MODULE_DEVICE_TABLE(of, rt_timer_match); -+ -+static struct platform_driver rt_timer_driver = { -+ .probe = rt_timer_probe, -+ .remove = rt_timer_remove, -+ .driver = { -+ .name = "rt-timer", -+ .owner = THIS_MODULE, -+ .of_match_table = rt_timer_match -+ }, -+}; -+ -+module_platform_driver(rt_timer_driver); -+ -+MODULE_DESCRIPTION("Ralink RT2880 timer"); -+MODULE_AUTHOR("John Crispin <blogic@openwrt.org"); -+MODULE_LICENSE("GPL"); |