This patch replaces the dev_vdbg with debugfs function calls
in i2c-exynos5.c driver.

Signed-off-by: Naveen Krishna Chatradhi <redacted>
---
Changes since v1:
The debugfs implementation is a suggestion by Felipe Balbi.
Its not tested, Implemented only for review purpose..

 drivers/i2c/busses/i2c-exynos5.c |  140 +++++++++++++++++++++++++++++---------
 1 file changed, 109 insertions(+), 31 deletions(-)

diff --git a/drivers/i2c/busses/i2c-exynos5.c b/drivers/i2c/busses/i2c-exynos5.c
index 7614f60..2d2da22 100644
--- a/drivers/i2c/busses/i2c-exynos5.c
+++ b/drivers/i2c/busses/i2c-exynos5.c

@@ -12,6 +12,7 @@
 
 #include <linux/kernel.h>
 #include <linux/module.h>
+#include <linux/debugfs.h>
 
 #include <linux/i2c.h>
 #include <linux/init.h>

@@ -55,6 +56,7 @@ struct exynos5_i2c {
 
 	int			bus_num;
 	int			speed_mode;
+	struct dentry		*debugfs_root;
 };
 
 static const struct of_device_id exynos5_i2c_match[] = {

@@ -63,39 +65,112 @@ static const struct of_device_id exynos5_i2c_match[] = {
 };
 MODULE_DEVICE_TABLE(of, exynos5_i2c_match);
 
-/* TODO: Should go to debugfs */
-static inline void dump_i2c_register(struct exynos5_i2c *i2c)
+static int exynos5_i2c_regs_show(struct seq_file *s, void *data)
 {
-	dev_vdbg(i2c->dev, "Register dump(%d) :\n %x\n %x\n %x\n %x\n"
-		" %x\n %x\n %x\n %x\n %x\n"
-		" %x\n %x\n %x\n %x\n %x\n"
-		" %x\n %x\n %x\n %x\n %x\n"
-		" %x\n %x\n %x\n %x\n %x\n",
-		i2c->suspended,
-		readl(i2c->regs + HSI2C_CTL),
-		readl(i2c->regs + HSI2C_FIFO_CTL),
-		readl(i2c->regs + HSI2C_TRAILIG_CTL),
-		readl(i2c->regs + HSI2C_CLK_CTL),
-		readl(i2c->regs + HSI2C_CLK_SLOT),
-		readl(i2c->regs + HSI2C_INT_ENABLE),
-		readl(i2c->regs + HSI2C_INT_STATUS),
-		readl(i2c->regs + HSI2C_ERR_STATUS),
-		readl(i2c->regs + HSI2C_FIFO_STATUS),
-		readl(i2c->regs + HSI2C_TX_DATA),
-		readl(i2c->regs + HSI2C_RX_DATA),
-		readl(i2c->regs + HSI2C_CONF),
-		readl(i2c->regs + HSI2C_AUTO_CONF),
-		readl(i2c->regs + HSI2C_TIMEOUT),
-		readl(i2c->regs + HSI2C_MANUAL_CMD),
-		readl(i2c->regs + HSI2C_TRANS_STATUS),
-		readl(i2c->regs + HSI2C_TIMING_HS1),
-		readl(i2c->regs + HSI2C_TIMING_HS2),
-		readl(i2c->regs + HSI2C_TIMING_HS3),
-		readl(i2c->regs + HSI2C_TIMING_FS1),
-		readl(i2c->regs + HSI2C_TIMING_FS2),
-		readl(i2c->regs + HSI2C_TIMING_FS3),
-		readl(i2c->regs + HSI2C_TIMING_SLA),
+	struct exynos5_i2c *i2c = (struct exynos5_i2c *)s->private;
+
+	if (i2c->suspended) {
+		seq_printf(s, "i2c suspended, can't read registers\n");
+		return 0;
+	}
+
+	pm_runtime_get_sync(i2c->dev);
+
+	seq_printf(s, "CTL:\t\t0x%08x\n",
+		readl(i2c->regs + HSI2C_CTL));