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atheros[ar2315-wdt]: update I/O handling

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* Pass iomem and IRQ via platform device resources
 * Remap iomem and use iowrite32 accessor function

Signed-off-by: Sergey Ryazanov <ryazanov.s.a@gmail.com>

SVN-Revision: 41688
This commit is contained in:
Felix Fietkau 2014-07-17 16:36:13 +00:00
parent 5ea0cff89c
commit 4f05d696ad
2 changed files with 50 additions and 12 deletions
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17
target/linux/atheros/patches-3.10/100-board.patch
View file

@ -2134,7 +2134,7 @@
+
--- /dev/null
+++ b/arch/mips/ar231x/ar2315.c
@@ -0,0 +1,624 @@
@@ -0,0 +1,639 @@
+/*
+ * 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
@ -2524,9 +2524,24 @@
+ .num_resources = ARRAY_SIZE(ar2315_spiflash_res)
+};
+
+static struct resource ar2315_wdt_res[] = {
+ {
+ .flags = IORESOURCE_MEM,
+ .start = AR2315_WD,
+ .end = AR2315_WD + 8 - 1,
+ },
+ {
+ .flags = IORESOURCE_IRQ,
+ .start = AR531X_MISC_IRQ_WATCHDOG,
+ .end = AR531X_MISC_IRQ_WATCHDOG,
+ }
+};
+
+static struct platform_device ar2315_wdt = {
+ .id = 0,
+ .name = "ar2315-wdt",
+ .resource = ar2315_wdt_res,
+ .num_resources = ARRAY_SIZE(ar2315_wdt_res)
+};
+
+/*

45
target/linux/atheros/patches-3.10/130-watchdog.patch
View file

@ -1,6 +1,6 @@
--- /dev/null
+++ b/drivers/watchdog/ar2315-wtd.c
@@ -0,0 +1,186 @@
@@ -0,0 +1,209 @@
+/*
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
@ -35,23 +35,32 @@
+#include <linux/io.h>
+#include <linux/uaccess.h>
+
+#include <ar231x_platform.h>
+#include <ar2315_regs.h>
+#include <ar231x.h>
+
+#define DRIVER_NAME "ar2315-wdt"
+
+#define CLOCK_RATE 40000000
+#define HEARTBEAT(x) (x < 1 || x > 90 ? 20 : x)
+
+#define WDT_REG_TIMER 0x00
+#define WDT_REG_CTRL 0x04
+
+#define WDT_CTRL_ACT_NONE 0x00000000 /* No action */
+#define WDT_CTRL_ACT_NMI 0x00000001 /* NMI on watchdog */
+#define WDT_CTRL_ACT_RESET 0x00000002 /* reset on watchdog */
+
+static int wdt_timeout = 20;
+static int started;
+static int in_use;
+static void __iomem *wdt_base;
+
+static inline void ar2315_wdt_wr(unsigned reg, u32 val)
+{
+ iowrite32(val, wdt_base + reg);
+}
+
+static void
+ar2315_wdt_enable(void)
+{
+ ar231x_write_reg(AR2315_WD, wdt_timeout * CLOCK_RATE);
+ ar2315_wdt_wr(WDT_REG_TIMER, wdt_timeout * CLOCK_RATE);
+}
+
+static ssize_t
@ -89,8 +98,8 @@
+ dev_crit(&pdev->dev, "watchdog expired, rebooting system\n");
+ emergency_restart();
+ } else {
+ ar231x_write_reg(AR2315_WDC, 0);
+ ar231x_write_reg(AR2315_WD, 0);
+ ar2315_wdt_wr(WDT_REG_CTRL, 0);
+ ar2315_wdt_wr(WDT_REG_TIMER, 0);
+ }
+ return IRQ_HANDLED;
+}
@ -147,10 +156,25 @@
+static int
+ar2315_wdt_probe(struct platform_device *dev)
+{
+ struct resource *mem_res, *irq_res;
+ int ret = 0;
+
+ ret = request_irq(AR531X_MISC_IRQ_WATCHDOG, ar2315_wdt_interrupt,
+ IRQF_DISABLED, DRIVER_NAME, dev);
+ if (wdt_base)
+ return -EBUSY;
+
+ irq_res = platform_get_resource(dev, IORESOURCE_IRQ, 0);
+ if (!irq_res) {
+ dev_err(&dev->dev, "no IRQ resource\n");
+ return -ENOENT;
+ }
+
+ mem_res = platform_get_resource(dev, IORESOURCE_MEM, 0);
+ wdt_base = devm_ioremap_resource(&dev->dev, mem_res);
+ if (IS_ERR(wdt_base))
+ return PTR_ERR(wdt_base);
+
+ ret = devm_request_irq(&dev->dev, irq_res->start, ar2315_wdt_interrupt,
+ IRQF_DISABLED, DRIVER_NAME, dev);
+ if (ret) {
+ dev_err(&dev->dev, "failed to register inetrrupt\n");
+ goto out;
@ -168,7 +192,6 @@
+ar2315_wdt_remove(struct platform_device *dev)
+{
+ misc_deregister(&ar2315_wdt_miscdev);
+ free_irq(AR531X_MISC_IRQ_WATCHDOG, NULL);
+ return 0;
+}
+