Merge branch 'for-2.6.25' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc

* 'for-2.6.25' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc: (454 commits)
  [POWERPC] Cell IOMMU fixed mapping support
  [POWERPC] Split out the ioid fetching/checking logic
  [POWERPC] Add support to cell_iommu_setup_page_tables() for multiple windows
  [POWERPC] Split out the IOMMU logic from cell_dma_dev_setup()
  [POWERPC] Split cell_iommu_setup_hardware() into two parts
  [POWERPC] Split out the logic that allocates struct iommus
  [POWERPC] Allocate the hash table under 1G on cell
  [POWERPC] Add set_dma_ops() to match get_dma_ops()
  [POWERPC] 83xx: Clean up / convert mpc83xx board DTS files to v1 format.
  [POWERPC] 85xx: Only invalidate TLB0 and TLB1
  [POWERPC] 83xx: Fix typo in mpc837x compatible entries
  [POWERPC] 85xx: convert sbc85* boards to use machine_device_initcall
  [POWERPC] 83xx: rework platform Kconfig
  [POWERPC] 85xx: rework platform Kconfig
  [POWERPC] 86xx: Remove unused IRQ defines
  [POWERPC] QE: Explicitly set address-cells and size cells for muram
  [POWERPC] Convert StorCenter DTS file to /dts-v1/ format.
  [POWERPC] 86xx: Convert all 86xx DTS files to /dts-v1/ format.
  [PPC] Remove 85xx from arch/ppc
  [PPC] Remove 83xx from arch/ppc
  ...

1 files changed, 36 insertions, 0 deletions

diff --git a/arch/ppc/syslib/mpc52xx_setup.c b/arch/ppc/syslib/mpc52xx_setup.c
index ecfa2c0..9f504fc 100644
--- a/arch/ppc/syslib/mpc52xx_setup.c
+++ b/arch/ppc/syslib/mpc52xx_setup.c
@@ -16,6 +16,7 @@
  */
 
 
+#include <linux/spinlock.h>
 #include <asm/io.h>
 #include <asm/time.h>
 #include <asm/mpc52xx.h>
@@ -275,3 +276,38 @@ int mpc52xx_match_psc_function(int psc_idx, const char *func)
 
 	return 0;
 }
+
+int mpc52xx_set_psc_clkdiv(int psc_id, int clkdiv)
+{
+	static spinlock_t lock = SPIN_LOCK_UNLOCKED;
+	struct mpc52xx_cdm __iomem *cdm;
+	unsigned long flags;
+	u16 mclken_div;
+	u16 __iomem *reg;
+	u32 mask;
+
+	cdm = ioremap(MPC52xx_PA(MPC52xx_CDM_OFFSET), MPC52xx_CDM_SIZE);
+	if (!cdm) {
+		printk(KERN_ERR __FILE__ ": Error mapping CDM\n");
+		return -ENODEV;
+	}
+
+	mclken_div = 0x8000 | (clkdiv & 0x1FF);
+	switch (psc_id) {
+	case 1: reg = &cdm->mclken_div_psc1; mask = 0x20; break;
+	case 2: reg = &cdm->mclken_div_psc2; mask = 0x40; break;
+	case 3: reg = &cdm->mclken_div_psc3; mask = 0x80; break;
+	case 6: reg = &cdm->mclken_div_psc6; mask = 0x10; break;
+	default:
+		return -ENODEV;
+	}
+
+	/* Set the rate and enable the clock */
+	spin_lock_irqsave(&lock, flags);
+	out_be16(reg, mclken_div);
+	out_be32(&cdm->clk_enables, in_be32(&cdm->clk_enables) | mask);
+	spin_unlock_irqrestore(&lock, flags);
+
+	iounmap(cdm);
+	return 0;
+}