Merge tag 'v3.10-rc7' into for-3.11/drivers

Linux 3.10-rc7

Pull this in early to avoid doing it with the bcache merge,
since there are a number of changes to bcache between my old
base (3.10-rc1) and the new pull request.

11 files changed, 119 insertions, 47 deletions

diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig
index 0c81915b1997..b9838130a7b0 100644
--- a/drivers/rtc/Kconfig
+++ b/drivers/rtc/Kconfig
@@ -20,7 +20,6 @@ if RTC_CLASS
 config RTC_HCTOSYS
         bool "Set system time from RTC on startup and resume"
         default y
-        depends on !ALWAYS_USE_PERSISTENT_CLOCK
         help
           If you say yes here, the system time (wall clock) will be set using
           the value read from a specified RTC device. This is useful to avoid
@@ -29,7 +28,6 @@ config RTC_HCTOSYS
 config RTC_SYSTOHC
         bool "Set the RTC time based on NTP synchronization"
         default y
-        depends on !ALWAYS_USE_PERSISTENT_CLOCK
         help
           If you say yes here, the system time (wall clock) will be stored
           in the RTC specified by RTC_HCTOSYS_DEVICE approximately every 11
diff --git a/drivers/rtc/rtc-at91rm9200.c b/drivers/rtc/rtc-at91rm9200.c
index 0eab77b22340..f296f3f7db9b 100644
--- a/drivers/rtc/rtc-at91rm9200.c
+++ b/drivers/rtc/rtc-at91rm9200.c
@@ -25,6 +25,7 @@
 #include <linux/rtc.h>
 #include <linux/bcd.h>
 #include <linux/interrupt.h>
+#include <linux/spinlock.h>
 #include <linux/ioctl.h>
 #include <linux/completion.h>
 #include <linux/io.h>
@@ -42,10 +43,65 @@
 
 #define AT91_RTC_EPOCH          1900UL  /* just like arch/arm/common/rtctime.c */
 
+struct at91_rtc_config {
+        bool use_shadow_imr;
+};
+
+static const struct at91_rtc_config *at91_rtc_config;
 static DECLARE_COMPLETION(at91_rtc_updated);
 static unsigned int at91_alarm_year = AT91_RTC_EPOCH;
 static void __iomem *at91_rtc_regs;
 static int irq;
+static DEFINE_SPINLOCK(at91_rtc_lock);
+static u32 at91_rtc_shadow_imr;
+
+static void at91_rtc_write_ier(u32 mask)
+{
+        unsigned long flags;
+
+        spin_lock_irqsave(&at91_rtc_lock, flags);
+        at91_rtc_shadow_imr |= mask;
+        at91_rtc_write(AT91_RTC_IER, mask);
+        spin_unlock_irqrestore(&at91_rtc_lock, flags);
+}
+
+static void at91_rtc_write_idr(u32 mask)
+{
+        unsigned long flags;
+
+        spin_lock_irqsave(&at91_rtc_lock, flags);
+        at91_rtc_write(AT91_RTC_IDR, mask);
+        /*
+         * Register read back (of any RTC-register) needed to make sure
+         * IDR-register write has reached the peripheral before updating
+         * shadow mask.
+         *
+         * Note that there is still a possibility that the mask is updated
+         * before interrupts have actually been disabled in hardware. The only
+         * way to be certain would be to poll the IMR-register, which is is
+         * the very register we are trying to emulate. The register read back
+         * is a reasonable heuristic.
+         */
+        at91_rtc_read(AT91_RTC_SR);
+        at91_rtc_shadow_imr &= ~mask;
+        spin_unlock_irqrestore(&at91_rtc_lock, flags);
+}
+
+static u32 at91_rtc_read_imr(void)
+{
+        unsigned long flags;
+        u32 mask;
+
+        if (at91_rtc_config->use_shadow_imr) {
+                spin_lock_irqsave(&at91_rtc_lock, flags);
+                mask = at91_rtc_shadow_imr;
+                spin_unlock_irqrestore(&at91_rtc_lock, flags);
+        } else {
+                mask = at91_rtc_read(AT91_RTC_IMR);
+        }
+
+        return mask;
+}
 
 /*
  * Decode time/date into rtc_time structure
@@ -110,9 +166,9 @@ static int at91_rtc_settime(struct device *dev, struct rtc_time *tm)
         cr = at91_rtc_read(AT91_RTC_CR);
         at91_rtc_write(AT91_RTC_CR, cr | AT91_RTC_UPDCAL | AT91_RTC_UPDTIM);
 
-        at91_rtc_write(AT91_RTC_IER, AT91_RTC_ACKUPD);
+        at91_rtc_write_ier(AT91_RTC_ACKUPD);
         wait_for_completion(&at91_rtc_updated); /* wait for ACKUPD interrupt */
-        at91_rtc_write(AT91_RTC_IDR, AT91_RTC_ACKUPD);
+        at91_rtc_write_idr(AT91_RTC_ACKUPD);
 
         at91_rtc_write(AT91_RTC_TIMR,
                           bin2bcd(tm->tm_sec) << 0
@@ -144,7 +200,7 @@ static int at91_rtc_readalarm(struct device *dev, struct rtc_wkalrm *alrm)
         tm->tm_yday = rtc_year_days(tm->tm_mday, tm->tm_mon, tm->tm_year);
         tm->tm_year = at91_alarm_year - 1900;
 
-        alrm->enabled = (at91_rtc_read(AT91_RTC_IMR) & AT91_RTC_ALARM)
+        alrm->enabled = (at91_rtc_read_imr() & AT91_RTC_ALARM)
                         ? 1 : 0;
 
         dev_dbg(dev, "%s(): %4d-%02d-%02d %02d:%02d:%02d\n", __func__,
@@ -169,7 +225,7 @@ static int at91_rtc_setalarm(struct device *dev, struct rtc_wkalrm *alrm)
         tm.tm_min = alrm->time.tm_min;
         tm.tm_sec = alrm->time.tm_sec;
 
-        at91_rtc_write(AT91_RTC_IDR, AT91_RTC_ALARM);
+        at91_rtc_write_idr(AT91_RTC_ALARM);
         at91_rtc_write(AT91_RTC_TIMALR,
                   bin2bcd(tm.tm_sec) << 0
                 | bin2bcd(tm.tm_min) << 8
@@ -182,7 +238,7 @@ static int at91_rtc_setalarm(struct device *dev, struct rtc_wkalrm *alrm)
 
         if (alrm->enabled) {
                 at91_rtc_write(AT91_RTC_SCCR, AT91_RTC_ALARM);
-                at91_rtc_write(AT91_RTC_IER, AT91_RTC_ALARM);
+                at91_rtc_write_ier(AT91_RTC_ALARM);
         }
 
         dev_dbg(dev, "%s(): %4d-%02d-%02d %02d:%02d:%02d\n", __func__,
@@ -198,9 +254,9 @@ static int at91_rtc_alarm_irq_enable(struct device *dev, unsigned int enabled)
 
         if (enabled) {
                 at91_rtc_write(AT91_RTC_SCCR, AT91_RTC_ALARM);
-                at91_rtc_write(AT91_RTC_IER, AT91_RTC_ALARM);
+                at91_rtc_write_ier(AT91_RTC_ALARM);
         } else
-                at91_rtc_write(AT91_RTC_IDR, AT91_RTC_ALARM);
+                at91_rtc_write_idr(AT91_RTC_ALARM);
 
         return 0;
 }
@@ -209,7 +265,7 @@ static int at91_rtc_alarm_irq_enable(struct device *dev, unsigned int enabled)
  */
 static int at91_rtc_proc(struct device *dev, struct seq_file *seq)
 {
-        unsigned long imr = at91_rtc_read(AT91_RTC_IMR);
+        unsigned long imr = at91_rtc_read_imr();
 
         seq_printf(seq, "update_IRQ\t: %s\n",
                         (imr & AT91_RTC_ACKUPD) ? "yes" : "no");
@@ -229,7 +285,7 @@ static irqreturn_t at91_rtc_interrupt(int irq, void *dev_id)
         unsigned int rtsr;
         unsigned long events = 0;
 
-        rtsr = at91_rtc_read(AT91_RTC_SR) & at91_rtc_read(AT91_RTC_IMR);
+        rtsr = at91_rtc_read(AT91_RTC_SR) & at91_rtc_read_imr();
         if (rtsr) {             /* this interrupt is shared!  Is it ours? */
                 if (rtsr & AT91_RTC_ALARM)
                         events |= (RTC_AF | RTC_IRQF);
@@ -250,6 +306,43 @@ static irqreturn_t at91_rtc_interrupt(int irq, void *dev_id)
         return IRQ_NONE;                /* not handled */
 }
 
+static const struct at91_rtc_config at91rm9200_config = {
+};
+
+static const struct at91_rtc_config at91sam9x5_config = {
+        .use_shadow_imr = true,
+};
+
+#ifdef CONFIG_OF
+static const struct of_device_id at91_rtc_dt_ids[] = {
+        {
+                .compatible = "atmel,at91rm9200-rtc",
+                .data = &at91rm9200_config,
+        }, {
+                .compatible = "atmel,at91sam9x5-rtc",
+                .data = &at91sam9x5_config,
+        }, {
+                /* sentinel */
+        }
+};
+MODULE_DEVICE_TABLE(of, at91_rtc_dt_ids);
+#endif
+
+static const struct at91_rtc_config *
+at91_rtc_get_config(struct platform_device *pdev)
+{
+        const struct of_device_id *match;
+
+        if (pdev->dev.of_node) {
+                match = of_match_node(at91_rtc_dt_ids, pdev->dev.of_node);
+                if (!match)
+                        return NULL;
+                return (const struct at91_rtc_config *)match->data;
+        }
+
+        return &at91rm9200_config;
+}
+
 static const struct rtc_class_ops at91_rtc_ops = {
         .read_time      = at91_rtc_readtime,
         .set_time       = at91_rtc_settime,
@@ -268,6 +361,10 @@ static int __init at91_rtc_probe(struct platform_device *pdev)
         struct resource *regs;
         int ret = 0;
 
+        at91_rtc_config = at91_rtc_get_config(pdev);
+        if (!at91_rtc_config)
+                return -ENODEV;
+
         regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
         if (!regs) {
                 dev_err(&pdev->dev, "no mmio resource defined\n");
@@ -290,7 +387,7 @@ static int __init at91_rtc_probe(struct platform_device *pdev)
         at91_rtc_write(AT91_RTC_MR, 0);         /* 24 hour mode */
 
         /* Disable all interrupts */
-        at91_rtc_write(AT91_RTC_IDR, AT91_RTC_ACKUPD | AT91_RTC_ALARM |
+        at91_rtc_write_idr(AT91_RTC_ACKUPD | AT91_RTC_ALARM |
                                         AT91_RTC_SECEV | AT91_RTC_TIMEV |
                                         AT91_RTC_CALEV);
 
@@ -335,7 +432,7 @@ static int __exit at91_rtc_remove(struct platform_device *pdev)
         struct rtc_device *rtc = platform_get_drvdata(pdev);
 
         /* Disable all interrupts */
-        at91_rtc_write(AT91_RTC_IDR, AT91_RTC_ACKUPD | AT91_RTC_ALARM |
+        at91_rtc_write_idr(AT91_RTC_ACKUPD | AT91_RTC_ALARM |
                                         AT91_RTC_SECEV | AT91_RTC_TIMEV |
                                         AT91_RTC_CALEV);
         free_irq(irq, pdev);
@@ -358,13 +455,13 @@ static int at91_rtc_suspend(struct device *dev)
         /* this IRQ is shared with DBGU and other hardware which isn't
          * necessarily doing PM like we are...
          */
-        at91_rtc_imr = at91_rtc_read(AT91_RTC_IMR)
+        at91_rtc_imr = at91_rtc_read_imr()
                         & (AT91_RTC_ALARM|AT91_RTC_SECEV);
         if (at91_rtc_imr) {
                 if (device_may_wakeup(dev))
                         enable_irq_wake(irq);
                 else
-                        at91_rtc_write(AT91_RTC_IDR, at91_rtc_imr);
+                        at91_rtc_write_idr(at91_rtc_imr);
         }
         return 0;
 }
@@ -375,7 +472,7 @@ static int at91_rtc_resume(struct device *dev)
                 if (device_may_wakeup(dev))
                         disable_irq_wake(irq);
                 else
-                        at91_rtc_write(AT91_RTC_IER, at91_rtc_imr);
+                        at91_rtc_write_ier(at91_rtc_imr);
         }
         return 0;
 }
@@ -383,12 +480,6 @@ static int at91_rtc_resume(struct device *dev)
 
 static SIMPLE_DEV_PM_OPS(at91_rtc_pm_ops, at91_rtc_suspend, at91_rtc_resume);
 
-static const struct of_device_id at91_rtc_dt_ids[] = {
-        { .compatible = "atmel,at91rm9200-rtc" },
-        { /* sentinel */ }
-};
-MODULE_DEVICE_TABLE(of, at91_rtc_dt_ids);
-
 static struct platform_driver at91_rtc_driver = {
         .remove         = __exit_p(at91_rtc_remove),
         .driver         = {
diff --git a/drivers/rtc/rtc-cmos.c b/drivers/rtc/rtc-cmos.c
index cc5bea9c4b1c..f1cb706445c7 100644
--- a/drivers/rtc/rtc-cmos.c
+++ b/drivers/rtc/rtc-cmos.c
@@ -854,6 +854,9 @@ static int cmos_resume(struct device *dev)
                 }
 
                 spin_lock_irq(&rtc_lock);
+                if (device_may_wakeup(dev))
+                        hpet_rtc_timer_init();
+
                 do {
                         CMOS_WRITE(tmp, RTC_CONTROL);
                         hpet_set_rtc_irq_bit(tmp & RTC_IRQMASK);
@@ -869,7 +872,6 @@ static int cmos_resume(struct device *dev)
                         rtc_update_irq(cmos->rtc, 1, mask);
                         tmp &= ~RTC_AIE;
                         hpet_mask_rtc_irq_bit(RTC_AIE);
-                        hpet_rtc_timer_init();
                 } while (mask & RTC_AIE);
                 spin_unlock_irq(&rtc_lock);
         }
diff --git a/drivers/rtc/rtc-max8998.c b/drivers/rtc/rtc-max8998.c
index 48b6612fae7f..d5af7baa48b5 100644
--- a/drivers/rtc/rtc-max8998.c
+++ b/drivers/rtc/rtc-max8998.c
@@ -285,7 +285,7 @@ static int max8998_rtc_probe(struct platform_device *pdev)
                         info->irq, ret);
 
         dev_info(&pdev->dev, "RTC CHIP NAME: %s\n", pdev->id_entry->name);
-        if (pdata->rtc_delay) {
+        if (pdata && pdata->rtc_delay) {
                 info->lp3974_bug_workaround = true;
                 dev_warn(&pdev->dev, "LP3974 with RTC REGERR option."
                                 " RTC updates will be extremely slow.\n");
diff --git a/drivers/rtc/rtc-nuc900.c b/drivers/rtc/rtc-nuc900.c
index f5dfb6e5e7d9..d592e2fe43f7 100644
--- a/drivers/rtc/rtc-nuc900.c
+++ b/drivers/rtc/rtc-nuc900.c
@@ -234,11 +234,6 @@ static int __init nuc900_rtc_probe(struct platform_device *pdev)
                 return -ENOMEM;
         }
         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-        if (!res) {
-                dev_err(&pdev->dev, "platform_get_resource failed\n");
-                return -ENXIO;
-        }
-
         nuc900_rtc->rtc_reg = devm_ioremap_resource(&pdev->dev, res);
         if (IS_ERR(nuc900_rtc->rtc_reg))
                 return PTR_ERR(nuc900_rtc->rtc_reg);
diff --git a/drivers/rtc/rtc-omap.c b/drivers/rtc/rtc-omap.c
index 4e1bdb832e37..b0ba3fc991ea 100644
--- a/drivers/rtc/rtc-omap.c
+++ b/drivers/rtc/rtc-omap.c
@@ -347,11 +347,6 @@ static int __init omap_rtc_probe(struct platform_device *pdev)
         }
 
         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-        if (!res) {
-                pr_debug("%s: RTC resource data missing\n", pdev->name);
-                return -ENOENT;
-        }
-
         rtc_base = devm_ioremap_resource(&pdev->dev, res);
         if (IS_ERR(rtc_base))
                 return PTR_ERR(rtc_base);
diff --git a/drivers/rtc/rtc-pl031.c b/drivers/rtc/rtc-pl031.c
index 8900ea784817..0f0609b1aa2c 100644
--- a/drivers/rtc/rtc-pl031.c
+++ b/drivers/rtc/rtc-pl031.c
@@ -306,7 +306,7 @@ static int pl031_remove(struct amba_device *adev)
         struct pl031_local *ldata = dev_get_drvdata(&adev->dev);
 
         amba_set_drvdata(adev, NULL);
-        free_irq(adev->irq[0], ldata->rtc);
+        free_irq(adev->irq[0], ldata);
         rtc_device_unregister(ldata->rtc);
         iounmap(ldata->base);
         kfree(ldata);
diff --git a/drivers/rtc/rtc-s3c.c b/drivers/rtc/rtc-s3c.c
index 14040b22888d..0b495e8b8e66 100644
--- a/drivers/rtc/rtc-s3c.c
+++ b/drivers/rtc/rtc-s3c.c
@@ -477,11 +477,6 @@ static int s3c_rtc_probe(struct platform_device *pdev)
         /* get the memory region */
 
         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-        if (res == NULL) {
-                dev_err(&pdev->dev, "failed to get memory region resource\n");
-                return -ENOENT;
-        }
-
         s3c_rtc_base = devm_ioremap_resource(&pdev->dev, res);
         if (IS_ERR(s3c_rtc_base))
                 return PTR_ERR(s3c_rtc_base);
diff --git a/drivers/rtc/rtc-tegra.c b/drivers/rtc/rtc-tegra.c
index a34315d25478..76af92ad5a8a 100644
--- a/drivers/rtc/rtc-tegra.c
+++ b/drivers/rtc/rtc-tegra.c
@@ -322,12 +322,6 @@ static int __init tegra_rtc_probe(struct platform_device *pdev)
                 return -ENOMEM;
 
         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-        if (!res) {
-                dev_err(&pdev->dev,
-                        "Unable to allocate resources for device.\n");
-                return -EBUSY;
-        }
-
         info->rtc_base = devm_ioremap_resource(&pdev->dev, res);
         if (IS_ERR(info->rtc_base))
                 return PTR_ERR(info->rtc_base);
diff --git a/drivers/rtc/rtc-tps6586x.c b/drivers/rtc/rtc-tps6586x.c
index 459c2ffc95a6..426901cef14f 100644
--- a/drivers/rtc/rtc-tps6586x.c
+++ b/drivers/rtc/rtc-tps6586x.c
@@ -273,6 +273,8 @@ static int tps6586x_rtc_probe(struct platform_device *pdev)
                 return ret;
         }
 
+        device_init_wakeup(&pdev->dev, 1);
+
         platform_set_drvdata(pdev, rtc);
         rtc->rtc = devm_rtc_device_register(&pdev->dev, dev_name(&pdev->dev),
                                        &tps6586x_rtc_ops, THIS_MODULE);
@@ -292,7 +294,6 @@ static int tps6586x_rtc_probe(struct platform_device *pdev)
                 goto fail_rtc_register;
         }
         disable_irq(rtc->irq);
-        device_set_wakeup_capable(&pdev->dev, 1);
         return 0;
 
 fail_rtc_register:
diff --git a/drivers/rtc/rtc-twl.c b/drivers/rtc/rtc-twl.c
index 8751a5240c99..b2eab34f38d9 100644
--- a/drivers/rtc/rtc-twl.c
+++ b/drivers/rtc/rtc-twl.c
@@ -524,6 +524,7 @@ static int twl_rtc_probe(struct platform_device *pdev)
         }
 
         platform_set_drvdata(pdev, rtc);
+        device_init_wakeup(&pdev->dev, 1);
         return 0;
 
 out2: