From: luowei <lw@rock-chips.com>
Date: Mon, 4 Aug 2014 01:51:47 +0000 (+0800)
Subject: pinctrl:fix debug command bug for rk3036/rk312x
X-Git-Tag: firefly_0821_release~4916^2~74
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=4552ee7de8ef5592b1c6a43dfb1ea2bba196c6da;p=firefly-linux-kernel-4.4.55.git

pinctrl:fix debug command bug for rk3036/rk312x

cat /sys/kernel/debug/rockchip_pinctrl/registers
---

diff --git a/drivers/pinctrl/pinctrl-rockchip.c b/drivers/pinctrl/pinctrl-rockchip.c
index a39bb5767ce6..9974404ae4cf 100755
--- a/drivers/pinctrl/pinctrl-rockchip.c
+++ b/drivers/pinctrl/pinctrl-rockchip.c
@@ -373,7 +373,7 @@ static ssize_t  pinctrl_show_regs(struct file *file, char __user *user_buf,
 	len += snprintf(buf + len, PINCTRL_REGS_BUFSIZE - len,
 			"=================================\n\n");
 
-	if(bank0)
+	if(bank0 && bank0->reg_mux_bank0 && bank0->reg_pull_bank0 && bank0->reg_drv_bank0)
 	{
 		len += snprintf(buf + len, PINCTRL_REGS_BUFSIZE - len,
 				"BANK0 GRF registers:\n");