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Date: Thu, 5 Feb 2009 09:26:22 -0800
From: Kevin Hilman <khilman@...prootsystems.com>
To: linux-kernel@...r.kernel.org
Cc: wim@...ana.be, Kevin Hilman <khilman@...prootsystems.com>
Subject: [PATCH] watchdog: davinci: convert to ioremap() + io[read|write]
Remove davinci platform-specific IO accessor macros in favor
of standard ioremap + io[read|write]* functions.
Signed-off-by: Kevin Hilman <khilman@...prootsystems.com>
---
drivers/watchdog/davinci_wdt.c | 32 +++++++++++++++++++-------------
1 files changed, 19 insertions(+), 13 deletions(-)
diff --git a/drivers/watchdog/davinci_wdt.c b/drivers/watchdog/davinci_wdt.c
index 2e13602..a9e5812 100644
--- a/drivers/watchdog/davinci_wdt.c
+++ b/drivers/watchdog/davinci_wdt.c
@@ -75,9 +75,9 @@ static void wdt_service(void)
spin_lock(&io_lock);
/* put watchdog in service state */
- davinci_writel(WDKEY_SEQ0, wdt_base + WDTCR);
+ iowrite32(WDKEY_SEQ0, wdt_base + WDTCR);
/* put watchdog in active state */
- davinci_writel(WDKEY_SEQ1, wdt_base + WDTCR);
+ iowrite32(WDKEY_SEQ1, wdt_base + WDTCR);
spin_unlock(&io_lock);
}
@@ -90,29 +90,29 @@ static void wdt_enable(void)
spin_lock(&io_lock);
/* disable, internal clock source */
- davinci_writel(0, wdt_base + TCR);
+ iowrite32(0, wdt_base + TCR);
/* reset timer, set mode to 64-bit watchdog, and unreset */
- davinci_writel(0, wdt_base + TGCR);
+ iowrite32(0, wdt_base + TGCR);
tgcr = TIMMODE_64BIT_WDOG | TIM12RS_UNRESET | TIM34RS_UNRESET;
- davinci_writel(tgcr, wdt_base + TGCR);
+ iowrite32(tgcr, wdt_base + TGCR);
/* clear counter regs */
- davinci_writel(0, wdt_base + TIM12);
- davinci_writel(0, wdt_base + TIM34);
+ iowrite32(0, wdt_base + TIM12);
+ iowrite32(0, wdt_base + TIM34);
/* set timeout period */
timer_margin = (((u64)heartbeat * CLOCK_TICK_RATE) & 0xffffffff);
- davinci_writel(timer_margin, wdt_base + PRD12);
+ iowrite32(timer_margin, wdt_base + PRD12);
timer_margin = (((u64)heartbeat * CLOCK_TICK_RATE) >> 32);
- davinci_writel(timer_margin, wdt_base + PRD34);
+ iowrite32(timer_margin, wdt_base + PRD34);
/* enable run continuously */
- davinci_writel(ENAMODE12_PERIODIC, wdt_base + TCR);
+ iowrite32(ENAMODE12_PERIODIC, wdt_base + TCR);
/* Once the WDT is in pre-active state write to
* TIM12, TIM34, PRD12, PRD34, TCR, TGCR, WDTCR are
* write protected (except for the WDKEY field)
*/
/* put watchdog in pre-active state */
- davinci_writel(WDKEY_SEQ0 | WDEN, wdt_base + WDTCR);
+ iowrite32(WDKEY_SEQ0 | WDEN, wdt_base + WDTCR);
/* put watchdog in active state */
- davinci_writel(WDKEY_SEQ1 | WDEN, wdt_base + WDTCR);
+ iowrite32(WDKEY_SEQ1 | WDEN, wdt_base + WDTCR);
spin_unlock(&io_lock);
}
@@ -218,7 +218,12 @@ static int davinci_wdt_probe(struct platform_device *pdev)
printk(KERN_INFO MODULE_NAME "failed to get memory region\n");
return -ENOENT;
}
- wdt_base = (void __iomem *)(res->start);
+
+ wdt_base = ioremap(res->start, res->end);
+ if (!wdt_base) {
+ printk(KERN_ERR MODULE_NAME "failed to map memory region\n");
+ return -ENOMEM;
+ }
ret = misc_register(&davinci_wdt_miscdev);
if (ret < 0) {
@@ -229,6 +234,7 @@ static int davinci_wdt_probe(struct platform_device *pdev)
set_bit(WDT_DEVICE_INITED, &wdt_status);
}
+ iounmap(wdt_base);
return ret;
}
--
1.6.1
--
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