ppc4xx: Correct UART input clock calculation and passing to fdt

We now use a value in the gd (global data) structure for the UART input
frequency, since the PPC4xx_SYS_INFO struct is always rewritten completely
in get_sys_info().

Signed-off-by: Stefan Roese <sr@denx.de>

cpu/ppc4xx/4xx_uart.c

@@ -192,9 +192,9 @@ static void serial_init_common(u32 base, u32 udiv, u16 bdiv)
 	 * the UART divisor is available
 	 */
 #ifdef CFG_EXT_SERIAL_CLOCK
-	sys_info.freqUART = CFG_EXT_SERIAL_CLOCK;
+	gd->uart_clk = CFG_EXT_SERIAL_CLOCK;
 #else
-	sys_info.freqUART = sys_info.freqUART / udiv;
+	gd->uart_clk = sys_info.freqUART / udiv;
 #endif
 
 	out_8((u8 *)base + UART_LCR, 0x80);	/* set DLAB bit */

cpu/ppc4xx/fdt.c

@@ -36,6 +36,8 @@
 #include <libfdt.h>
 #include <libfdt_env.h>
 
+DECLARE_GLOBAL_DATA_PTR;
+
 static void do_fixup(void *fdt, const char *node, const char *prop,
 		     const void *val, int len, int create)
 {
@@ -44,7 +46,7 @@ static void do_fixup(void *fdt, const char *node, const char *prop,
 	debug("Updating property '%s/%s' = ", node, prop);
 	for (i = 0; i < len; i++)
 		debug(" %.2x", *(u8*)(val+i));
-	debug("\n");
+	debug("(%d)\n", *(u32 *)val);
 #endif
 	int rc = fdt_find_and_setprop(fdt, node, prop, val, len, create);
 	if (rc)
@@ -83,9 +85,9 @@ static void do_fixup_uart(void *fdt, int offset, int i, bd_t *bd)
 
 	get_sys_info(&sys_info);
 
-	debug("Updating node UART%d\n", i);
+	debug("Updating node UART%d: clock-frequency=%d\n", i, gd->uart_clk);
 
-	val = cpu_to_fdt32(sys_info.freqUART);
+	val = cpu_to_fdt32(gd->uart_clk);
 	rc = fdt_setprop(fdt, offset, "clock-frequency", &val, 4);
 	if (rc)
 		printf("Unable to update node UART, err=%s\n", fdt_strerror(rc));

include/asm-ppc/global_data.h

@@ -107,6 +107,9 @@ typedef	struct	global_data {
 	unsigned int	dp_alloc_base;
 	unsigned int	dp_alloc_top;
 #endif
+#if defined(CONFIG_4xx)
+	u32  uart_clk;
+#endif /* CONFIG_4xx */
 #if defined(CFG_GT_6426x)
 	unsigned int	mirror_hack[16];
 #endif