This patch converts the OMAP Watchdog timer driver to
get adapted to HWMOD FW and to use the runtime PM APIs.
Signed-off-by: Charulatha V <charu@xxxxxx>
Signed-off-by: Basak, Partha <p-basak2@xxxxxx>
---
arch/arm/plat-omap/devices.c | 52 ++++++++++++++++++++++++++++++-----------
drivers/watchdog/omap_wdt.c | 43 ++++++----------------------------
2 files changed, 46 insertions(+), 49 deletions(-)
diff --git a/arch/arm/plat-omap/devices.c b/arch/arm/plat-omap/devices.c
index d1920be..efe2aff 100644
--- a/arch/arm/plat-omap/devices.c
+++ b/arch/arm/plat-omap/devices.c
@@ -15,6 +15,7 @@
#include <linux/platform_device.h>
#include <linux/io.h>
#include <linux/slab.h>
+#include <linux/err.h>
#include <mach/hardware.h>
#include <asm/mach-types.h>
@@ -28,6 +29,8 @@
#include <plat/menelaus.h>
#include <plat/mcbsp.h>
#include <plat/omap44xx.h>
+#include <plat/omap_hwmod.h>
+#include <plat/omap_device.h>
/*-------------------------------------------------------------------------*/
@@ -238,6 +241,8 @@ static inline void omap_init_uwire(void) {}
static struct resource wdt_resources[] = {
{
+ .start = 0xfffeb000,
+ .end = 0xfffeb07F,
.flags = IORESOURCE_MEM,
},
};
@@ -249,24 +254,43 @@ static struct platform_device omap_wdt_device = {
.resource = wdt_resources,
};
-static void omap_init_wdt(void)
+struct omap_device_pm_latency omap_wdt_latency[] = {
+ [0] = {
+ .deactivate_func = omap_device_idle_hwmods,
+ .activate_func = omap_device_enable_hwmods,
+ .flags = OMAP_DEVICE_LATENCY_AUTO_ADJUST,
+ },
+};
+
+static void omap2_init_wdt()
{
- if (cpu_is_omap16xx())
- wdt_resources[0].start = 0xfffeb000;
- else if (cpu_is_omap2420())
- wdt_resources[0].start = 0x48022000; /* WDT2 */
- else if (cpu_is_omap2430())
- wdt_resources[0].start = 0x49016000; /* WDT2 */
- else if (cpu_is_omap343x())
- wdt_resources[0].start = 0x48314000; /* WDT2 */
- else if (cpu_is_omap44xx())
- wdt_resources[0].start = 0x4a314000;
- else
+ int id = -1;
+ struct omap_device *od;
+ struct omap_hwmod *oh;
+ char *oh_name = "wd_timer2";
+ char *name = "omap_wdt";
+
+ oh = omap_hwmod_lookup(oh_name);
+ if (!oh) {
+ pr_err("Could not look up %s\n", oh_name);
return;
+ }
- wdt_resources[0].end = wdt_resources[0].start + 0x4f;
+ od = omap_device_build(name, id, oh, NULL, 0,
+ omap_wdt_latency,
+ ARRAY_SIZE(omap_wdt_latency), 0);
+ WARN(IS_ERR(od), "Cant build omap_device for %s:%s.\n",
+ name, oh->name);
+ return 0;
+}
- (void) platform_device_register(&omap_wdt_device);
+static void omap_init_wdt(void)
+{
+ if (cpu_class_is_omap2())
+ omap2_init_wdt();
+ else if (cpu_is_omap16xx())
+ (void) platform_device_register(&omap_wdt_device);
+ return;
}
#else
static inline void omap_init_wdt(void) {}
diff --git a/drivers/watchdog/omap_wdt.c b/drivers/watchdog/omap_wdt.c
index 76b58ab..7645ca3 100644
--- a/drivers/watchdog/omap_wdt.c
+++ b/drivers/watchdog/omap_wdt.c
@@ -38,13 +38,14 @@
#include <linux/err.h>
#include <linux/platform_device.h>
#include <linux/moduleparam.h>
-#include <linux/clk.h>
#include <linux/bitops.h>
#include <linux/io.h>
#include <linux/uaccess.h>
#include <linux/slab.h>
+#include <linux/pm_runtime.h>
#include <mach/hardware.h>
#include <plat/prcm.h>
+#include <plat/omap_device.h>
#include "omap_wdt.h"
@@ -61,8 +62,6 @@ struct omap_wdt_dev {
void __iomem *base; /* physical */
struct device *dev;
int omap_wdt_users;
- struct clk *ick;
- struct clk *fck;
struct resource *mem;
struct miscdevice omap_wdt_miscdev;
};
@@ -146,8 +145,7 @@ static int omap_wdt_open(struct inode *inode, struct file *file)
if (test_and_set_bit(1, (unsigned long *)&(wdev->omap_wdt_users)))
return -EBUSY;
- clk_enable(wdev->ick); /* Enable the interface clock */
- clk_enable(wdev->fck); /* Enable the functional clock */
+ pm_runtime_get_sync(wdev->dev);
/* initialize prescaler */
while (__raw_readl(base + OMAP_WATCHDOG_WPS) & 0x01)
@@ -177,8 +175,7 @@ static int omap_wdt_release(struct inode *inode, struct file *file)
omap_wdt_disable(wdev);
- clk_disable(wdev->ick);
- clk_disable(wdev->fck);
+ pm_runtime_put_sync(wdev->dev);
#else
printk(KERN_CRIT "omap_wdt: Unexpected close, not stopping!\n");
#endif
@@ -292,19 +289,7 @@ static int __devinit omap_wdt_probe(struct platform_device *pdev)
wdev->omap_wdt_users = 0;
wdev->mem = mem;
-
- wdev->ick = clk_get(&pdev->dev, "ick");
- if (IS_ERR(wdev->ick)) {
- ret = PTR_ERR(wdev->ick);
- wdev->ick = NULL;
- goto err_clk;
- }
- wdev->fck = clk_get(&pdev->dev, "fck");
- if (IS_ERR(wdev->fck)) {
- ret = PTR_ERR(wdev->fck);
- wdev->fck = NULL;
- goto err_clk;
- }
+ wdev->dev = &pdev->dev;
wdev->base = ioremap(res->start, resource_size(res));
if (!wdev->base) {
@@ -314,8 +299,8 @@ static int __devinit omap_wdt_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, wdev);
- clk_enable(wdev->ick);
- clk_enable(wdev->fck);
+ pm_runtime_enable(wdev->dev);
+ pm_runtime_get_sync(wdev->dev);
omap_wdt_disable(wdev);
omap_wdt_adjust_timeout(timer_margin);
@@ -333,11 +318,7 @@ static int __devinit omap_wdt_probe(struct platform_device *pdev)
__raw_readl(wdev->base + OMAP_WATCHDOG_REV) & 0xFF,
timer_margin);
- /* autogate OCP interface clock */
- __raw_writel(0x01, wdev->base + OMAP_WATCHDOG_SYS_CONFIG);
-
- clk_disable(wdev->ick);
- clk_disable(wdev->fck);
+ pm_runtime_put_sync(wdev->dev);
omap_wdt_dev = pdev;
@@ -349,12 +330,6 @@ err_misc:
err_ioremap:
wdev->base = NULL;
-
-err_clk:
- if (wdev->ick)
- clk_put(wdev->ick);
- if (wdev->fck)
- clk_put(wdev->fck);
kfree(wdev);
err_kzalloc:
@@ -386,8 +361,6 @@ static int __devexit omap_wdt_remove(struct platform_device *pdev)
release_mem_region(res->start, resource_size(res));
platform_set_drvdata(pdev, NULL);
- clk_put(wdev->ick);
- clk_put(wdev->fck);
iounmap(wdev->base);
kfree(wdev);
--
1.6.3.3
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