ARM: at91: make watchdog drivers soc independent

switch the watchdog drivers to resource and pass it via platform_device

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>

14 files changed, 88 insertions, 18 deletions

diff --git a/arch/arm/mach-at91/at91cap9_devices.c b/arch/arm/mach-at91/at91cap9_devices.c
index 3262a7edc9c7..019dac047b91 100644
--- a/arch/arm/mach-at91/at91cap9_devices.c
+++ b/arch/arm/mach-at91/at91cap9_devices.c
@@ -694,10 +694,19 @@ static void __init at91_add_device_rtt(void)
  * -------------------------------------------------------------------- */
 
 #if defined(CONFIG_AT91SAM9X_WATCHDOG) || defined(CONFIG_AT91SAM9X_WATCHDOG_MODULE)
+static struct resource wdt_resources[] = {
+        {
+                .start  = AT91CAP9_BASE_WDT,
+                .end    = AT91CAP9_BASE_WDT + SZ_16 - 1,
+                .flags  = IORESOURCE_MEM,
+        }
+};
+
 static struct platform_device at91cap9_wdt_device = {
         .name           = "at91_wdt",
         .id             = -1,
-        .num_resources  = 0,
+        .resource       = wdt_resources,
+        .num_resources  = ARRAY_SIZE(wdt_resources),
 };
 
 static void __init at91_add_device_watchdog(void)
diff --git a/arch/arm/mach-at91/at91sam9260_devices.c b/arch/arm/mach-at91/at91sam9260_devices.c
index 63cbfb887fbf..9cdaffa0d6b1 100644
--- a/arch/arm/mach-at91/at91sam9260_devices.c
+++ b/arch/arm/mach-at91/at91sam9260_devices.c
@@ -738,10 +738,19 @@ static void __init at91_add_device_rtt(void)
  * -------------------------------------------------------------------- */
 
 #if defined(CONFIG_AT91SAM9X_WATCHDOG) || defined(CONFIG_AT91SAM9X_WATCHDOG_MODULE)
+static struct resource wdt_resources[] = {
+        {
+                .start  = AT91SAM9260_BASE_WDT,
+                .end    = AT91SAM9260_BASE_WDT + SZ_16 - 1,
+                .flags  = IORESOURCE_MEM,
+        }
+};
+
 static struct platform_device at91sam9260_wdt_device = {
         .name           = "at91_wdt",
         .id             = -1,
-        .num_resources  = 0,
+        .resource       = wdt_resources,
+        .num_resources  = ARRAY_SIZE(wdt_resources),
 };
 
 static void __init at91_add_device_watchdog(void)
diff --git a/arch/arm/mach-at91/at91sam9261_devices.c b/arch/arm/mach-at91/at91sam9261_devices.c
index d5bd1e704421..c59e1e9a4f5c 100644
--- a/arch/arm/mach-at91/at91sam9261_devices.c
+++ b/arch/arm/mach-at91/at91sam9261_devices.c
@@ -624,10 +624,19 @@ static void __init at91_add_device_rtt(void)
  * -------------------------------------------------------------------- */
 
 #if defined(CONFIG_AT91SAM9X_WATCHDOG) || defined(CONFIG_AT91SAM9X_WATCHDOG_MODULE)
+static struct resource wdt_resources[] = {
+        {
+                .start  = AT91SAM9261_BASE_WDT,
+                .end    = AT91SAM9261_BASE_WDT + SZ_16 - 1,
+                .flags  = IORESOURCE_MEM,
+        }
+};
+
 static struct platform_device at91sam9261_wdt_device = {
         .name           = "at91_wdt",
         .id             = -1,
-        .num_resources  = 0,
+        .resource       = wdt_resources,
+        .num_resources  = ARRAY_SIZE(wdt_resources),
 };
 
 static void __init at91_add_device_watchdog(void)
diff --git a/arch/arm/mach-at91/at91sam9263_devices.c b/arch/arm/mach-at91/at91sam9263_devices.c
index 5d2b061fcc64..b5f4e2532fdb 100644
--- a/arch/arm/mach-at91/at91sam9263_devices.c
+++ b/arch/arm/mach-at91/at91sam9263_devices.c
@@ -996,10 +996,19 @@ static void __init at91_add_device_rtt(void)
  * -------------------------------------------------------------------- */
 
 #if defined(CONFIG_AT91SAM9X_WATCHDOG) || defined(CONFIG_AT91SAM9X_WATCHDOG_MODULE)
+static struct resource wdt_resources[] = {
+        {
+                .start  = AT91SAM9263_BASE_WDT,
+                .end    = AT91SAM9263_BASE_WDT + SZ_16 - 1,
+                .flags  = IORESOURCE_MEM,
+        }
+};
+
 static struct platform_device at91sam9263_wdt_device = {
         .name           = "at91_wdt",
         .id             = -1,
-        .num_resources  = 0,
+        .resource       = wdt_resources,
+        .num_resources  = ARRAY_SIZE(wdt_resources),
 };
 
 static void __init at91_add_device_watchdog(void)
diff --git a/arch/arm/mach-at91/at91sam9g45_devices.c b/arch/arm/mach-at91/at91sam9g45_devices.c
index bb2ba0c1d0ee..3b91706e4f7d 100644
--- a/arch/arm/mach-at91/at91sam9g45_devices.c
+++ b/arch/arm/mach-at91/at91sam9g45_devices.c
@@ -1133,10 +1133,19 @@ static void __init at91_add_device_trng(void) {}
  * -------------------------------------------------------------------- */
 
 #if defined(CONFIG_AT91SAM9X_WATCHDOG) || defined(CONFIG_AT91SAM9X_WATCHDOG_MODULE)
+static struct resource wdt_resources[] = {
+        {
+                .start  = AT91SAM9G45_BASE_WDT,
+                .end    = AT91SAM9G45_BASE_WDT + SZ_16 - 1,
+                .flags  = IORESOURCE_MEM,
+        }
+};
+
 static struct platform_device at91sam9g45_wdt_device = {
         .name           = "at91_wdt",
         .id             = -1,
-        .num_resources  = 0,
+        .resource       = wdt_resources,
+        .num_resources  = ARRAY_SIZE(wdt_resources),
 };
 
 static void __init at91_add_device_watchdog(void)
diff --git a/arch/arm/mach-at91/at91sam9rl_devices.c b/arch/arm/mach-at91/at91sam9rl_devices.c
index f9b423b7d7ae..c7961b446dd8 100644
--- a/arch/arm/mach-at91/at91sam9rl_devices.c
+++ b/arch/arm/mach-at91/at91sam9rl_devices.c
@@ -709,10 +709,19 @@ static void __init at91_add_device_rtt(void)
  * -------------------------------------------------------------------- */
 
 #if defined(CONFIG_AT91SAM9X_WATCHDOG) || defined(CONFIG_AT91SAM9X_WATCHDOG_MODULE)
+static struct resource wdt_resources[] = {
+        {
+                .start  = AT91SAM9RL_BASE_WDT,
+                .end    = AT91SAM9RL_BASE_WDT + SZ_16 - 1,
+                .flags  = IORESOURCE_MEM,
+        }
+};
+
 static struct platform_device at91sam9rl_wdt_device = {
         .name           = "at91_wdt",
         .id             = -1,
-        .num_resources  = 0,
+        .resource       = wdt_resources,
+        .num_resources  = ARRAY_SIZE(wdt_resources),
 };
 
 static void __init at91_add_device_watchdog(void)
diff --git a/arch/arm/mach-at91/include/mach/at91cap9.h b/arch/arm/mach-at91/include/mach/at91cap9.h
index 5ac468c219af..750ba85614ca 100644
--- a/arch/arm/mach-at91/include/mach/at91cap9.h
+++ b/arch/arm/mach-at91/include/mach/at91cap9.h
@@ -86,7 +86,6 @@
 #define AT91_AIC        (0xfffff000 - AT91_BASE_SYS)
 #define AT91_PMC        (0xfffffc00 - AT91_BASE_SYS)
 #define AT91_RSTC       (0xfffffd00 - AT91_BASE_SYS)
-#define AT91_WDT        (0xfffffd40 - AT91_BASE_SYS)
 #define AT91_GPBR       (cpu_is_at91cap9_revB() ?       \
                         (0xfffffd50 - AT91_BASE_SYS) :  \
                         (0xfffffd60 - AT91_BASE_SYS))
@@ -101,6 +100,7 @@
 #define AT91CAP9_BASE_SHDWC     0xfffffd10
 #define AT91CAP9_BASE_RTT       0xfffffd20
 #define AT91CAP9_BASE_PIT       0xfffffd30
+#define AT91CAP9_BASE_WDT       0xfffffd40
 
 #define AT91_USART0     AT91CAP9_BASE_US0
 #define AT91_USART1     AT91CAP9_BASE_US1
diff --git a/arch/arm/mach-at91/include/mach/at91sam9260.h b/arch/arm/mach-at91/include/mach/at91sam9260.h
index e3c819ab3435..05860c5eb548 100644
--- a/arch/arm/mach-at91/include/mach/at91sam9260.h
+++ b/arch/arm/mach-at91/include/mach/at91sam9260.h
@@ -86,7 +86,6 @@
 #define AT91_DBGU       (0xfffff200 - AT91_BASE_SYS)
 #define AT91_PMC        (0xfffffc00 - AT91_BASE_SYS)
 #define AT91_RSTC       (0xfffffd00 - AT91_BASE_SYS)
-#define AT91_WDT        (0xfffffd40 - AT91_BASE_SYS)
 #define AT91_GPBR       (0xfffffd50 - AT91_BASE_SYS)
 
 #define AT91SAM9260_BASE_ECC    0xffffe800
@@ -97,6 +96,7 @@
 #define AT91SAM9260_BASE_SHDWC  0xfffffd10
 #define AT91SAM9260_BASE_RTT    0xfffffd20
 #define AT91SAM9260_BASE_PIT    0xfffffd30
+#define AT91SAM9260_BASE_WDT    0xfffffd40
 
 #define AT91_USART0     AT91SAM9260_BASE_US0
 #define AT91_USART1     AT91SAM9260_BASE_US1
diff --git a/arch/arm/mach-at91/include/mach/at91sam9261.h b/arch/arm/mach-at91/include/mach/at91sam9261.h
index f9b516368f96..df2ddfd2d22e 100644
--- a/arch/arm/mach-at91/include/mach/at91sam9261.h
+++ b/arch/arm/mach-at91/include/mach/at91sam9261.h
@@ -71,7 +71,6 @@
 #define AT91_DBGU       (0xfffff200 - AT91_BASE_SYS)
 #define AT91_PMC        (0xfffffc00 - AT91_BASE_SYS)
 #define AT91_RSTC       (0xfffffd00 - AT91_BASE_SYS)
-#define AT91_WDT        (0xfffffd40 - AT91_BASE_SYS)
 #define AT91_GPBR       (0xfffffd50 - AT91_BASE_SYS)
 
 #define AT91SAM9261_BASE_SMC    0xffffec00
@@ -81,6 +80,7 @@
 #define AT91SAM9261_BASE_SHDWC  0xfffffd10
 #define AT91SAM9261_BASE_RTT    0xfffffd20
 #define AT91SAM9261_BASE_PIT    0xfffffd30
+#define AT91SAM9261_BASE_WDT    0xfffffd40
 
 #define AT91_USART0     AT91SAM9261_BASE_US0
 #define AT91_USART1     AT91SAM9261_BASE_US1
diff --git a/arch/arm/mach-at91/include/mach/at91sam9263.h b/arch/arm/mach-at91/include/mach/at91sam9263.h
index 28d52d588e90..0eb614eb2fa6 100644
--- a/arch/arm/mach-at91/include/mach/at91sam9263.h
+++ b/arch/arm/mach-at91/include/mach/at91sam9263.h
@@ -81,7 +81,6 @@
 #define AT91_AIC        (0xfffff000 - AT91_BASE_SYS)
 #define AT91_PMC        (0xfffffc00 - AT91_BASE_SYS)
 #define AT91_RSTC       (0xfffffd00 - AT91_BASE_SYS)
-#define AT91_WDT        (0xfffffd40 - AT91_BASE_SYS)
 #define AT91_GPBR       (0xfffffd60 - AT91_BASE_SYS)
 
 #define AT91SAM9263_BASE_ECC0   0xffffe000
@@ -96,6 +95,7 @@
 #define AT91SAM9263_BASE_SHDWC  0xfffffd10
 #define AT91SAM9263_BASE_RTT0   0xfffffd20
 #define AT91SAM9263_BASE_PIT    0xfffffd30
+#define AT91SAM9263_BASE_WDT    0xfffffd40
 #define AT91SAM9263_BASE_RTT1   0xfffffd50
 
 #define AT91_USART0     AT91SAM9263_BASE_US0
diff --git a/arch/arm/mach-at91/include/mach/at91sam9g45.h b/arch/arm/mach-at91/include/mach/at91sam9g45.h
index 5f3453ef5866..65098c323101 100644
--- a/arch/arm/mach-at91/include/mach/at91sam9g45.h
+++ b/arch/arm/mach-at91/include/mach/at91sam9g45.h
@@ -93,7 +93,6 @@
 #define AT91_AIC        (0xfffff000 - AT91_BASE_SYS)
 #define AT91_PMC        (0xfffffc00 - AT91_BASE_SYS)
 #define AT91_RSTC       (0xfffffd00 - AT91_BASE_SYS)
-#define AT91_WDT        (0xfffffd40 - AT91_BASE_SYS)
 #define AT91_GPBR       (0xfffffd60 - AT91_BASE_SYS)
 #define AT91_RTC        (0xfffffdb0 - AT91_BASE_SYS)
 
@@ -108,6 +107,7 @@
 #define AT91SAM9G45_BASE_SHDWC  0xfffffd10
 #define AT91SAM9G45_BASE_RTT    0xfffffd20
 #define AT91SAM9G45_BASE_PIT    0xfffffd30
+#define AT91SAM9G45_BASE_WDT    0xfffffd40
 
 #define AT91_USART0     AT91SAM9G45_BASE_US0
 #define AT91_USART1     AT91SAM9G45_BASE_US1
diff --git a/arch/arm/mach-at91/include/mach/at91sam9rl.h b/arch/arm/mach-at91/include/mach/at91sam9rl.h
index 6f3a4eeb7394..46e136d3ef3f 100644
--- a/arch/arm/mach-at91/include/mach/at91sam9rl.h
+++ b/arch/arm/mach-at91/include/mach/at91sam9rl.h
@@ -75,7 +75,6 @@
 #define AT91_DBGU       (0xfffff200 - AT91_BASE_SYS)
 #define AT91_PMC        (0xfffffc00 - AT91_BASE_SYS)
 #define AT91_RSTC       (0xfffffd00 - AT91_BASE_SYS)
-#define AT91_WDT        (0xfffffd40 - AT91_BASE_SYS)
 #define AT91_SCKCR      (0xfffffd50 - AT91_BASE_SYS)
 #define AT91_GPBR       (0xfffffd60 - AT91_BASE_SYS)
 #define AT91_RTC        (0xfffffe00 - AT91_BASE_SYS)
@@ -90,6 +89,7 @@
 #define AT91SAM9RL_BASE_SHDWC   0xfffffd10
 #define AT91SAM9RL_BASE_RTT     0xfffffd20
 #define AT91SAM9RL_BASE_PIT     0xfffffd30
+#define AT91SAM9RL_BASE_WDT     0xfffffd40
 
 #define AT91_USART0     AT91SAM9RL_BASE_US0
 #define AT91_USART1     AT91SAM9RL_BASE_US1
diff --git a/drivers/watchdog/at91sam9_wdt.c b/drivers/watchdog/at91sam9_wdt.c
index 87445b2d72a7..00562566ef5f 100644
--- a/drivers/watchdog/at91sam9_wdt.c
+++ b/drivers/watchdog/at91sam9_wdt.c
@@ -35,6 +35,11 @@
 
 #define DRV_NAME "AT91SAM9 Watchdog"
 
+#define wdt_read(field) \
+        __raw_readl(at91wdt_private.base + field)
+#define wdt_write(field, val) \
+        __raw_writel((val), at91wdt_private.base + field)
+
 /* AT91SAM9 watchdog runs a 12bit counter @ 256Hz,
  * use this to convert a watchdog
  * value from/to milliseconds.
@@ -63,6 +68,7 @@ MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started "
 static void at91_ping(unsigned long data);
 
 static struct {
+        void __iomem *base;
         unsigned long next_heartbeat;   /* the next_heartbeat for the timer */
         unsigned long open;
         char expect_close;
@@ -77,7 +83,7 @@ static struct {
  */
 static inline void at91_wdt_reset(void)
 {
-        at91_sys_write(AT91_WDT_CR, AT91_WDT_KEY | AT91_WDT_WDRSTT);
+        wdt_write(AT91_WDT_CR, AT91_WDT_KEY | AT91_WDT_WDRSTT);
 }
 
 /*
@@ -132,7 +138,7 @@ static int at91_wdt_settimeout(unsigned int timeout)
         unsigned int mr;
 
         /* Check if disabled */
-        mr = at91_sys_read(AT91_WDT_MR);
+        mr = wdt_read(AT91_WDT_MR);
         if (mr & AT91_WDT_WDDIS) {
                 printk(KERN_ERR DRV_NAME": sorry, watchdog is disabled\n");
                 return -EIO;
@@ -149,7 +155,7 @@ static int at91_wdt_settimeout(unsigned int timeout)
                 | AT91_WDT_WDDBGHLT     /* disabled in debug mode */
                 | AT91_WDT_WDD          /* restart at any time */
                 | (timeout & AT91_WDT_WDV);  /* timer value */
-        at91_sys_write(AT91_WDT_MR, reg);
+        wdt_write(AT91_WDT_MR, reg);
 
         return 0;
 }
@@ -248,12 +254,22 @@ static struct miscdevice at91wdt_miscdev = {
 
 static int __init at91wdt_probe(struct platform_device *pdev)
 {
+        struct resource *r;
         int res;
 
         if (at91wdt_miscdev.parent)
                 return -EBUSY;
         at91wdt_miscdev.parent = &pdev->dev;
 
+        r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+        if (!r)
+                return -ENODEV;
+        at91wdt_private.base = ioremap(r->start, resource_size(r));
+        if (!at91wdt_private.base) {
+                dev_err(&pdev->dev, "failed to map registers, aborting.\n");
+                return -ENOMEM;
+        }
+
         /* Set watchdog */
         res = at91_wdt_settimeout(ms_to_ticks(WDT_HW_TIMEOUT * 1000));
         if (res)
diff --git a/drivers/watchdog/at91sam9_wdt.h b/drivers/watchdog/at91sam9_wdt.h
index 757f9cab5c82..c6fbb2e6c41b 100644
--- a/drivers/watchdog/at91sam9_wdt.h
+++ b/drivers/watchdog/at91sam9_wdt.h
@@ -16,11 +16,11 @@
 #ifndef AT91_WDT_H
 #define AT91_WDT_H
 
-#define AT91_WDT_CR             (AT91_WDT + 0x00)       /* Watchdog Control Register */
+#define AT91_WDT_CR             0x00                    /* Watchdog Control Register */
 #define         AT91_WDT_WDRSTT         (1    << 0)             /* Restart */
 #define         AT91_WDT_KEY            (0xa5 << 24)            /* KEY Password */
 
-#define AT91_WDT_MR             (AT91_WDT + 0x04)       /* Watchdog Mode Register */
+#define AT91_WDT_MR             0x04                    /* Watchdog Mode Register */
 #define         AT91_WDT_WDV            (0xfff << 0)            /* Counter Value */
 #define         AT91_WDT_WDFIEN         (1     << 12)           /* Fault Interrupt Enable */
 #define         AT91_WDT_WDRSTEN        (1     << 13)           /* Reset Processor */
@@ -30,7 +30,7 @@
 #define         AT91_WDT_WDDBGHLT       (1     << 28)           /* Debug Halt */
 #define         AT91_WDT_WDIDLEHLT      (1     << 29)           /* Idle Halt */
 
-#define AT91_WDT_SR             (AT91_WDT + 0x08)       /* Watchdog Status Register */
+#define AT91_WDT_SR             0x08                    /* Watchdog Status Register */
 #define         AT91_WDT_WDUNF          (1 << 0)                /* Watchdog Underflow */
 #define         AT91_WDT_WDERR          (1 << 1)                /* Watchdog Error */