From: 黄涛 <huangtao@rock-chips.com>
Date: Wed, 23 Apr 2014 09:56:07 +0000 (+0800)
Subject: clk: rockchip: support dump cru register when panic
X-Git-Tag: firefly_0821_release~5454
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=193836a1645f00218e2e43ecaff3b7d1f52dcf77;p=firefly-linux-kernel-4.4.55.git

clk: rockchip: support dump cru register when panic
---

diff --git a/drivers/clk/rockchip/clk.c b/drivers/clk/rockchip/clk.c
index 67136aad7da6..282f133e327c 100755
--- a/drivers/clk/rockchip/clk.c
+++ b/drivers/clk/rockchip/clk.c
@@ -1525,17 +1525,8 @@ static void rkclk_cache_parents(struct rkclk *rkclk)
 
 void rk_dump_cru(void)
 {
-	u32 i;
-
-	printk("\n");
-	printk("dump cru regs:");
-	for (i = 0; i * 4 <= 0x01b0; i++) {
-		if (i % 4 == 0)
-			printk("\n%s: \t[0x%08x]: ", __func__,
-				(unsigned int)RK_CRU_VIRT + i * 4);
-		printk("%08x ", readl(RK_CRU_VIRT + i * 4));
-	}
-	printk("\n\n");
+	printk(KERN_WARNING "CRU:\n");
+	print_hex_dump(KERN_WARNING, "", DUMP_PREFIX_OFFSET, 16, 4, RK_CRU_VIRT, 0x220, false);
 }
 EXPORT_SYMBOL_GPL(rk_dump_cru);
 
@@ -1815,6 +1806,16 @@ void rk_clk_test(void) {}
 #endif
 EXPORT_SYMBOL_GPL(rk_clk_test);
 
+static int rkclk_panic(struct notifier_block *this, unsigned long ev, void *ptr)
+{
+	rk_dump_cru();
+	return NOTIFY_DONE;
+}
+
+static struct notifier_block rkclk_panic_block = {
+	.notifier_call = rkclk_panic,
+};
+
 void __init rkclk_init_clks(struct device_node *node);
 
 static struct device_node * clk_root_node=NULL;
@@ -1883,6 +1884,7 @@ static void __init rk_clk_tree_init(struct device_node *np)
 
 	rk_clk_test();
 
+	atomic_notifier_chain_register(&panic_notifier_list, &rkclk_panic_block);
 }
 CLK_OF_DECLARE(rk_clocks, "rockchip,rk-clocks", rk_clk_tree_init);