From: Terry Lv <r65388@freescale.com>
Date: Fri, 16 Nov 2012 07:41:01 +0000 (+0800)
Subject: ENGR00233929: add kernel command line to enable snvs
X-Git-Tag: v3.0.35-fsl~245
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=25ffe7d74591b7457c8f01eef573cf3c2651e144;p=karo-tx-linux.git

ENGR00233929: add kernel command line to enable snvs

In MX6Q/DL, originally GPIO_0 is used as CKO pin function. when SNVS
module is enabled, CKO output stops suddenly.
Both CKO clock config register CCOSR and GPIO_0 IOMUX register value are
not changed. But because ALT7 of GPIO_0 pad is SNVS_VIO_5 function. I
doubt that when SNVS module is enabled, GPIO_0 pad is automatically
changed to SNVS instance by SoC.
Thus we add option for snvs enable/disable.

Signed-off-by: Terry Lv <r65388@freescale.com>
---

diff --git a/arch/arm/mach-mx6/board-mx6q_sabrelite.c b/arch/arm/mach-mx6/board-mx6q_sabrelite.c
index 3289b1a5a98e..cec9bf0705bd 100644
--- a/arch/arm/mach-mx6/board-mx6q_sabrelite.c
+++ b/arch/arm/mach-mx6/board-mx6q_sabrelite.c
@@ -103,6 +103,7 @@ static struct clk *sata_clk;
 extern char *gp_reg_id;
 extern char *soc_reg_id;
 extern char *pu_reg_id;
+static int caam_enabled;
 
 extern struct regulator *(*get_cpu_regulator)(void);
 extern void (*put_cpu_regulator)(void);
@@ -1114,6 +1115,13 @@ static struct mipi_csi2_platform_data mipi_csi2_pdata = {
 	.pixel_clk = "emi_clk",
 };
 
+static int __init caam_setup(char *__unused)
+{
+	caam_enabled = 1;
+	return 1;
+}
+early_param("caam", caam_setup);
+
 /*!
  * Board specific initialization.
  */
@@ -1158,7 +1166,8 @@ static void __init mx6_sabrelite_board_init(void)
 	imx6q_add_mipi_csi2(&mipi_csi2_pdata);
 	imx6q_add_imx_snvs_rtc();
 
-	imx6q_add_imx_caam();
+	if (1 == caam_enabled)
+		imx6q_add_imx_caam();
 
 	imx6q_add_imx_i2c(0, &mx6q_sabrelite_i2c_data);
 	imx6q_add_imx_i2c(1, &mx6q_sabrelite_i2c_data);
diff --git a/arch/arm/mach-mx6/board-mx6q_sabresd.c b/arch/arm/mach-mx6/board-mx6q_sabresd.c
index 863b2b1b8a88..86f1091cdcf1 100644
--- a/arch/arm/mach-mx6/board-mx6q_sabresd.c
+++ b/arch/arm/mach-mx6/board-mx6q_sabresd.c
@@ -204,7 +204,7 @@ static int mma8451_position = 1;
 static int mag3110_position = 2;
 static int max11801_mode = 1;
 static int enable_lcd_ldb;
-
+static int caam_enabled;
 
 extern char *gp_reg_id;
 extern char *soc_reg_id;
@@ -1629,6 +1629,13 @@ static struct mipi_csi2_platform_data mipi_csi2_pdata = {
 	.pixel_clk = "emi_clk",
 };
 
+static int __init caam_setup(char *__unused)
+{
+	caam_enabled = 1;
+	return 1;
+}
+early_param("caam", caam_setup);
+
 #define SNVS_LPCR 0x38
 static void mx6_snvs_poweroff(void)
 {
@@ -1728,7 +1735,8 @@ static void __init mx6_sabresd_board_init(void)
 	imx6q_add_mipi_csi2(&mipi_csi2_pdata);
 	imx6q_add_imx_snvs_rtc();
 
-	imx6q_add_imx_caam();
+	if (1 == caam_enabled)
+		imx6q_add_imx_caam();
 
 	if (board_is_mx6_reva()) {
 		strcpy(mxc_i2c0_board_info[0].type, "wm8958");