Merge tag 'cleanup-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc

Pull ARM SoC cleanups from Olof Johansson:
 "This is the branch where we usually queue up cleanup efforts, moving
  drivers out of the architecture directory, header file restructuring,
  etc.  Sometimes they tangle with new development so it's hard to keep
  it strictly to cleanups.

  Some of the things included in this branch are:

   * Atmel SAMA5 conversion to common clock
   * Reset framework conversion for tegra platforms
    - Some of this depends on tegra clock driver reworks that are shared
      with Mike Turquette's clk tree.
   * Tegra DMA refactoring, which are shared branches with the DMA tree.
   * Removal of some header files on exynos to prepare for
     multiplatform"

* tag 'cleanup-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (169 commits)
  ARM: mvebu: move Armada 370/XP specific definitions to armada-370-xp.h
  ARM: mvebu: remove prototypes of non-existing functions from common.h
  ARM: mvebu: move ARMADA_XP_MAX_CPUS to armada-370-xp.h
  serial: sh-sci: Rework baud rate calculation
  serial: sh-sci: Compute overrun_bit without using baud rate algo
  serial: sh-sci: Remove unused GPIO request code
  serial: sh-sci: Move overrun_bit and error_mask fields out of pdata
  serial: sh-sci: Support resources passed through platform resources
  serial: sh-sci: Don't check IRQ in verify port operation
  serial: sh-sci: Set the UPF_FIXED_PORT flag
  serial: sh-sci: Remove duplicate interrupt check in verify port op
  serial: sh-sci: Simplify baud rate calculation algorithms
  serial: sh-sci: Remove baud rate calculation algorithm 5
  serial: sh-sci: Sort headers alphabetically
  ARM: EXYNOS: Kill exynos_pm_late_initcall()
  ARM: EXYNOS: Consolidate selection of PM_GENERIC_DOMAINS for Exynos4
  ARM: at91: switch Calao QIL-A9260 board to DT
  clk: at91: fix pmc_clk_ids data type attriubte
  PM / devfreq: use inclusion <mach/map.h> instead of <plat/map-s5p.h>
  ARM: EXYNOS: remove <mach/regs-clock.h> for exynos
  ...

1 files changed, 13 insertions, 1 deletions

diff --git a/arch/arm/mach-at91/at91sam926x_time.c b/arch/arm/mach-at91/at91sam926x_time.c
index bb392320a0dd..0f04ffe9c5a8 100644
--- a/arch/arm/mach-at91/at91sam926x_time.c
+++ b/arch/arm/mach-at91/at91sam926x_time.c
@@ -39,6 +39,7 @@
 static u32 pit_cycle;		/* write-once */
 static u32 pit_cnt;		/* access only w/system irq blocked */
 static void __iomem *pit_base_addr __read_mostly;
+static struct clk *mck;
 
 static inline unsigned int pit_read(unsigned int reg_offset)
 {
@@ -195,10 +196,14 @@ static int __init of_at91sam926x_pit_init(void)
 	if (!pit_base_addr)
 		goto node_err;
 
+	mck = of_clk_get(np, 0);
+
 	/* Get the interrupts property */
 	ret = irq_of_parse_and_map(np, 0);
 	if (!ret) {
 		pr_crit("AT91: PIT: Unable to get IRQ from DT\n");
+		if (!IS_ERR(mck))
+			clk_put(mck);
 		goto ioremap_err;
 	}
 	at91sam926x_pit_irq.irq = ret;
@@ -230,6 +235,8 @@ void __init at91sam926x_pit_init(void)
 	unsigned	bits;
 	int		ret;
 
+	mck = ERR_PTR(-ENOENT);
+
 	/* For device tree enabled device: initialize here */
 	of_at91sam926x_pit_init();
 
@@ -237,7 +244,12 @@ void __init at91sam926x_pit_init(void)
 	 * Use our actual MCK to figure out how many MCK/16 ticks per
 	 * 1/HZ period (instead of a compile-time constant LATCH).
 	 */
-	pit_rate = clk_get_rate(clk_get(NULL, "mck")) / 16;
+	if (IS_ERR(mck))
+		mck = clk_get(NULL, "mck");
+
+	if (IS_ERR(mck))
+		panic("AT91: PIT: Unable to get mck clk\n");
+	pit_rate = clk_get_rate(mck) / 16;
 	pit_cycle = (pit_rate + HZ/2) / HZ;
 	WARN_ON(((pit_cycle - 1) & ~AT91_PIT_PIV) != 0);