Merge master.kernel.org:/home/rmk/linux-2.6-arm

* master.kernel.org:/home/rmk/linux-2.6-arm: (37 commits)
  ARM: 5673/1: U300 fix initsection compile warning
  ARM: Fix broken highmem support
  mx31moboard: invert sdhc ro signal sense
  ARM: S3C24XX: Fix clkout mpx error
  ARM: S3C64XX: serial: Fix a typo in Kconfig
  IXP4xx: Fix IO_SPACE_LIMIT for 2.6.31-rc core PCI changes
  OMAP3: RX51: Updated rx51_defconfig
  OMAP2/3: mmc-twl4030: Free up MMC regulators while cleaning up
  OMAP3: RX51: Define TWL4030 USB transceiver in board file
  OMAP3: Overo: Fix smsc911x platform device resource value
  OMAP3: Fix omap3 sram virtual addres overlap vmalloc space after increasing vmalloc size
  OMAP2/3: DMA errata correction
  OMAP: Fix testing of cpu defines for mach-omap1
  OMAP3: Overo: add missing pen-down GPIO definition
  OMAP: GPIO: clear/restore level/edge detect settings on mask/unmask
  OMAP3: PM: Fix wrong sequence in suspend.
  OMAP: PM: CPUfreq: obey min/max settings of policy
  OMAP2/3/4: UART: allow in-order port traversal
  OMAP2/3/4: UART: Allow per-UART disabling wakeup for serial ports
  OMAP3: Fixed crash bug with serial + suspend
  ...

1 files changed, 43 insertions, 0 deletions

diff --git a/arch/arm/mach-omap2/prcm.c b/arch/arm/mach-omap2/prcm.c
index f945156d5585..ced555a4cd1a 100644
--- a/arch/arm/mach-omap2/prcm.c
+++ b/arch/arm/mach-omap2/prcm.c
@@ -17,6 +17,7 @@
 #include <linux/init.h>
 #include <linux/clk.h>
 #include <linux/io.h>
+#include <linux/delay.h>
 
 #include <mach/common.h>
 #include <mach/prcm.h>
@@ -28,6 +29,8 @@
 static void __iomem *prm_base;
 static void __iomem *cm_base;
 
+#define MAX_MODULE_ENABLE_WAIT		100000
+
 u32 omap_prcm_get_reset_sources(void)
 {
 	/* XXX This presumably needs modification for 34XX */
@@ -120,6 +123,46 @@ u32 cm_rmw_mod_reg_bits(u32 mask, u32 bits, s16 module, s16 idx)
 }
 EXPORT_SYMBOL(cm_rmw_mod_reg_bits);
 
+/**
+ * omap2_cm_wait_idlest - wait for IDLEST bit to indicate module readiness
+ * @reg: physical address of module IDLEST register
+ * @mask: value to mask against to determine if the module is active
+ * @name: name of the clock (for printk)
+ *
+ * Returns 1 if the module indicated readiness in time, or 0 if it
+ * failed to enable in roughly MAX_MODULE_ENABLE_WAIT microseconds.
+ */
+int omap2_cm_wait_idlest(void __iomem *reg, u32 mask, const char *name)
+{
+	int i = 0;
+	int ena = 0;
+
+	/*
+	 * 24xx uses 0 to indicate not ready, and 1 to indicate ready.
+	 * 34xx reverses this, just to keep us on our toes
+	 */
+	if (cpu_is_omap24xx())
+		ena = mask;
+	else if (cpu_is_omap34xx())
+		ena = 0;
+	else
+		BUG();
+
+	/* Wait for lock */
+	while (((__raw_readl(reg) & mask) != ena) &&
+	       (i++ < MAX_MODULE_ENABLE_WAIT))
+		udelay(1);
+
+	if (i < MAX_MODULE_ENABLE_WAIT)
+		pr_debug("cm: Module associated with clock %s ready after %d "
+			 "loops\n", name, i);
+	else
+		pr_err("cm: Module associated with clock %s didn't enable in "
+		       "%d tries\n", name, MAX_MODULE_ENABLE_WAIT);
+
+	return (i < MAX_MODULE_ENABLE_WAIT) ? 1 : 0;
+};
+
 void __init omap2_set_globals_prcm(struct omap_globals *omap2_globals)
 {
 	prm_base = omap2_globals->prm;