Merge tag 'drivers-3.15' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc

Pull ARM SoC driver changes from Arnd Bergmann:
 "These changes are mostly for ARM specific device drivers that either
  don't have an upstream maintainer, or that had the maintainer ask us
  to pick up the changes to avoid conflicts.

  A large chunk of this are clock drivers (bcm281xx, exynos, versatile,
  shmobile), aside from that, reset controllers for STi as well as a
  large rework of the Marvell Orion/EBU watchdog driver are notable"

* tag 'drivers-3.15' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (99 commits)
  Revert "dts: socfpga: Add DTS entry for adding the stmmac glue layer for stmmac."
  Revert "net: stmmac: Add SOCFPGA glue driver"
  ARM: shmobile: r8a7791: Fix SCIFA3-5 clocks
  ARM: STi: Add reset controller support to mach-sti Kconfig
  drivers: reset: stih416: add softreset controller
  drivers: reset: stih415: add softreset controller
  drivers: reset: Reset controller driver for STiH416
  drivers: reset: Reset controller driver for STiH415
  drivers: reset: STi SoC system configuration reset controller support
  dts: socfpga: Add sysmgr node so the gmac can use to reference
  dts: socfpga: Add support for SD/MMC on the SOCFPGA platform
  reset: Add optional resets and stubs
  ARM: shmobile: r7s72100: fix bus clock calculation
  Power: Reset: Generalize qnap-poweroff to work on Synology devices.
  dts: socfpga: Update clock entry to support multiple parents
  ARM: socfpga: Update socfpga_defconfig
  dts: socfpga: Add DTS entry for adding the stmmac glue layer for stmmac.
  net: stmmac: Add SOCFPGA glue driver
  watchdog: orion_wdt: Use %pa to print 'phys_addr_t'
  drivers: cci: Export CCI PMU revision
  ...

2 files changed, 13 insertions, 4 deletions

diff --git a/drivers/rtc/rtc-isl12057.c b/drivers/rtc/rtc-isl12057.c
index 7e5ead936a04..41bd76aaff76 100644
--- a/drivers/rtc/rtc-isl12057.c
+++ b/drivers/rtc/rtc-isl12057.c
@@ -274,10 +274,7 @@ static int isl12057_probe(struct i2c_client *client,
         dev_set_drvdata(dev, data);
 
         rtc = devm_rtc_device_register(dev, DRV_NAME, &rtc_ops, THIS_MODULE);
-        if (IS_ERR(rtc))
-                return PTR_ERR(rtc);
-
-        return 0;
+        return PTR_ERR_OR_ZERO(rtc);
 }
 
 #ifdef CONFIG_OF
diff --git a/drivers/rtc/rtc-mv.c b/drivers/rtc/rtc-mv.c
index d536c5962c99..d15a999363fc 100644
--- a/drivers/rtc/rtc-mv.c
+++ b/drivers/rtc/rtc-mv.c
@@ -222,6 +222,7 @@ static int __init mv_rtc_probe(struct platform_device *pdev)
         struct resource *res;
         struct rtc_plat_data *pdata;
         u32 rtc_time;
+        u32 rtc_date;
         int ret = 0;
 
         pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
@@ -257,6 +258,17 @@ static int __init mv_rtc_probe(struct platform_device *pdev)
                 }
         }
 
+        /*
+         * A date after January 19th, 2038 does not fit on 32 bits and
+         * will confuse the kernel and userspace. Reset to a sane date
+         * (January 1st, 2013) if we're after 2038.
+         */
+        rtc_date = readl(pdata->ioaddr + RTC_DATE_REG_OFFS);
+        if (bcd2bin((rtc_date >> RTC_YEAR_OFFS) & 0xff) >= 38) {
+                dev_info(&pdev->dev, "invalid RTC date, resetting to January 1st, 2013\n");
+                writel(0x130101, pdata->ioaddr + RTC_DATE_REG_OFFS);
+        }
+
         pdata->irq = platform_get_irq(pdev, 0);
 
         platform_set_drvdata(pdev, pdata);