1 files changed, 54 insertions, 0 deletions
diff --git a/arch/powerpc/cpu/mpc512x/iopin.c b/arch/powerpc/cpu/mpc512x/iopin.c
index be20947623..1a39101622 100644
--- a/arch/powerpc/cpu/mpc512x/iopin.c
+++ b/arch/powerpc/cpu/mpc512x/iopin.c
@@ -47,3 +47,57 @@ void iopin_initialize(iopin_t *ioregs_init, int len)
 	}
 	return;
 }
+
+void iopin_initialize_bits(iopin_t *ioregs_init, int len)
+{
+	short i, j, p;
+	u32 *reg, mask;
+	immap_t *im = (immap_t *)CONFIG_SYS_IMMR;
+
+	reg = (u32 *)&(im->io_ctrl);
+
+	/* iterate over table entries */
+	for (i = 0; i < len; i++) {
+		/* iterate over pins within a table entry */
+		for (p = 0, j = ioregs_init[i].p_offset / sizeof(u_long);
+			p < ioregs_init[i].nr_pins; p++, j++) {
+			if (ioregs_init[i].bit_or & IO_PIN_OVER_EACH) {
+				/* replace all settings at once */
+				out_be32(reg + j, ioregs_init[i].val);
+			} else {
+				/*
+				 * only replace individual parts, but
+				 * REPLACE them instead of just ORing
+				 * them in and "inheriting" previously
+				 * set bits which we don't want
+				 */
+				mask = 0;
+				if (ioregs_init[i].bit_or & IO_PIN_OVER_FMUX)
+					mask |= IO_PIN_FMUX(3);
+
+				if (ioregs_init[i].bit_or & IO_PIN_OVER_HOLD)
+					mask |= IO_PIN_HOLD(3);
+
+				if (ioregs_init[i].bit_or & IO_PIN_OVER_PULL)
+					mask |= IO_PIN_PUD(1) | IO_PIN_PUE(1);
+
+				if (ioregs_init[i].bit_or & IO_PIN_OVER_STRIG)
+					mask |= IO_PIN_ST(1);
+
+				if (ioregs_init[i].bit_or & IO_PIN_OVER_DRVSTR)
+					mask |= IO_PIN_DS(3);
+				/*
+				 * DON'T do the "mask, then insert"
+				 * in place on the register, it may
+				 * break access to external hardware
+				 * (like boot ROMs) when configuring
+				 * LPB related pins, while the code to
+				 * configure the pin is read from this
+				 * very address region
+				 */
+				clrsetbits_be32(reg + j, mask,
+						ioregs_init[i].val & mask);
+			}
+		}
+	}
+}