[POWERPC] MPC5200: Don't make firmware fixups into common code

The Lite5200 u-boot image doesn't entirely configure the processor
correctly and so Linux needs to fixup the cpu setup in setup_arch.  Fixing
the CPU setup is good, but making it into common code is not a good idea.

New board ports should be encouraged not to take the lead of the lite5200
and instead get their firmware to setup the CPU the right way.

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Sylvain Munaut <tnt@246tnt.com>

1 files changed, 12 insertions, 23 deletions

diff --git a/arch/powerpc/platforms/52xx/mpc52xx_common.c b/arch/powerpc/platforms/52xx/mpc52xx_common.c
index 3eeb6c62e0ff..3bc201e07e6b 100644
--- a/arch/powerpc/platforms/52xx/mpc52xx_common.c
+++ b/arch/powerpc/platforms/52xx/mpc52xx_common.c
@@ -75,44 +75,33 @@ mpc52xx_find_ipb_freq(struct device_node *node)
 EXPORT_SYMBOL(mpc52xx_find_ipb_freq);
 
 
+/*
+ * Configure the XLB arbiter settings to match what Linux expects.
+ */
 void __init
-mpc52xx_setup_cpu(void)
+mpc5200_setup_xlb_arbiter(void)
 {
-	struct mpc52xx_cdm  __iomem *cdm;
 	struct mpc52xx_xlb  __iomem *xlb;
 
-	/* Map zones */
-	cdm = mpc52xx_find_and_map("mpc5200-cdm");
 	xlb = mpc52xx_find_and_map("mpc5200-xlb");
-
-	if (!cdm || !xlb) {
+	if (!xlb) {
 		printk(KERN_ERR __FILE__ ": "
-			"Error while mapping CDM/XLB during mpc52xx_setup_cpu. "
+			"Error mapping XLB in mpc52xx_setup_cpu().  "
 			"Expect some abnormal behavior\n");
-		goto unmap_regs;
+		return;
 	}
 
-	/* Use internal 48 Mhz */
-	out_8(&cdm->ext_48mhz_en, 0x00);
-	out_8(&cdm->fd_enable, 0x01);
-	if (in_be32(&cdm->rstcfg) & 0x40)	/* Assumes 33Mhz clock */
-		out_be16(&cdm->fd_counters, 0x0001);
-	else
-		out_be16(&cdm->fd_counters, 0x5555);
-
 	/* Configure the XLB Arbiter priorities */
 	out_be32(&xlb->master_pri_enable, 0xff);
 	out_be32(&xlb->master_priority, 0x11111111);
 
-	/* Disable XLB pipelining */
-	/* (cfr errate 292. We could do this only just before ATA PIO
-	    transaction and re-enable it afterwards ...) */
+	/* Disable XLB pipelining
+	 * (cfr errate 292. We could do this only just before ATA PIO
+	 *  transaction and re-enable it afterwards ...)
+	 */
 	out_be32(&xlb->config, in_be32(&xlb->config) | MPC52xx_XLB_CFG_PLDIS);
 
-	/* Unmap zones */
-unmap_regs:
-	if (cdm) iounmap(cdm);
-	if (xlb) iounmap(xlb);
+	iounmap(xlb);
 }
 
 void __init