aspeed: dump scu state

Print the SCU registers before and after we run aspeed_init_early, as well as after the drivers have been initalised (just before userspace is started). This is temporary code and should not be submitted upstream. Signed-off-by: Joel Stanley <[email protected]>
openbmc · Nov 18, 2015 · 052ab67 · 052ab67
1 parent 611d0d2
commit 052ab67
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diff --git a/arch/arm/mach-aspeed/aspeed.c b/arch/arm/mach-aspeed/aspeed.c
@@ -124,12 +124,35 @@ static void udbg_uart_putc(char c)
 	udbg_uart_out(UART_THR, c);
 }
 
+void aspeed_dump_scu(void)
+{
+	int i;
+
+	for (i = 0; i <= 0xE4; i+=4) {
+		if (i == 0x78 || i == 0xE0 || i == 0xE4)
+			continue;
+		printk("SCU %03x  %08x\n", i,
+			readl(AST_IO(AST_BASE_SCU | i)));
+	}
+
+	printk("SCU %02x  %08x\n", 0x160, readl(AST_IO(AST_BASE_SCU | 0x160)));
+
+	for (i = 0x180; i <= 0x19C; i+=4)
+		printk("SCU %02x  %08x\n", i,
+			readl(AST_IO(AST_BASE_SCU | i)));
+
+	printk("SCU %02x  %08x\n", 0x1a4, readl(AST_IO(AST_BASE_SCU | 0x1a4)));
+}
+EXPORT_SYMBOL_GPL(aspeed_dump_scu);
+
 #define SCU_PASSWORD	0x1688A8A8
 
 static void __init aspeed_init_early(void)
 {
 	u32 reg;
 
+	aspeed_dump_scu();
+
 	// XXX UART stuff to fix to pinmux & co
 	printk("UART IO MUX...\n");
 	writel(0x02010023, AST_IO(AST_BASE_LPC | 0x9c));
@@ -159,6 +182,8 @@ static void __init aspeed_init_early(void)
 	udbg_uart_putc('O');
 	udbg_uart_putc('O');
 	udbg_uart_putc('\n');
+
+	aspeed_dump_scu();
 }
 
 static void __init aspeed_map_io(void)

diff --git a/init/main.c b/init/main.c
@@ -88,6 +88,8 @@
 #include <asm/sections.h>
 #include <asm/cacheflush.h>
 
+extern void aspeed_dump_scu(void);
+
 static int kernel_init(void *);
 
 extern void init_IRQ(void);
@@ -679,6 +681,8 @@ asmlinkage __visible void __init start_kernel(void)
 
 	ftrace_init();
 
+	aspeed_dump_scu();
+
 	/* Do the rest non-__init'ed, we're now alive */
 	rest_init();
 }