[U-Boot] [PATCH v3 00/10] apalis-tk1: fixes/updates for v2019.10

[U-Boot] [PATCH v3 00/10] apalis-tk1: fixes/updates for v2019.10

[Igor Opaniuk]

Misc. fixes related to pinmux configuration (fan), default bootargs,
reset reason output and power rail configuration.

Changes in v3:
* Added patch for apalis-v1.2 hardware support (there are some 80 symbol
warnings in pmux_pingrp_config definition, but fixing this will break
aligment of pinmux configuration "table" in
board/toradex/apalis-tk1/pinmux-config-apalis-tk1.h)
* Attached R-b tags [Oleksandr Suvorov] from v2 [2]

Changes in v2:
* Rebased on the latest u-boot-tegra/master
* Attached R-b tags [Oleksandr Suvorov] from v1 [1]

[1] https://patchwork.ozlabs.org/cover/1139705/
[2] https://patchwork.ozlabs.org/cover/1140332/

Dominik Sliwa (2):
  apalis-tk1/t30: colibri_t30: display reset reason
  apalis-tk1: remove non-esential power rails on boot

Igor Opaniuk (5):
  apalis-tk1: set apalis gpio 8 aka fan_en
  apalis-tk1: provide proper USB vendor id
  apalis-tk1: enable user debug by default
  apalis-tk1: add pcie_aspm=off to defargs
  apalis-tk1: switch to zImage

Marcel Ziswiler (3):
  apalis-tk1: do not explicitly release reset_moci#
  apalis-tk1: remove default vesa vga mode from vidargs
  apalis-tk1: support v1.2 hardware revision

 arch/arm/dts/tegra124-apalis.dts              | 89 ++++++++++---------
 arch/arm/mach-tegra/sys_info.c                | 32 ++++---
 arch/arm/mach-tegra/tegra124/cpu.c            | 45 ++++++++++
 board/toradex/apalis-tk1/apalis-tk1.c         | 47 ++++++++++
 board/toradex/apalis-tk1/as3722_init.c        | 23 +++++
 .../apalis-tk1/pinmux-config-apalis-tk1.h     | 21 +++--
 configs/apalis-tk1_defconfig                  |  4 +-
 include/configs/apalis-tk1.h                  | 29 +++---
 8 files changed, 214 insertions(+), 76 deletions(-)

-- 
2.17.1

[U-Boot] [PATCH v3 01/10] apalis-tk1: do not explicitly release reset_moci#

[Igor Opaniuk]

From: Marcel Ziswiler <marcel.ziswiler@toradex.com>

By keeping RESET_MOCI_CTRL low we avoid explicitly releasing
RESET_MOCI#.

Please note that module hardware versions up to V1.1A will already
release RESET_MOCI# in hardware coming out of reset.

Please further note that with this change the USB hub on the Apalis
Evaluation board is kept in reset in U-Boot and therefore none of its
ports are operational in U-Boot.

Reviewed-by: Oleksandr Suvorov <oleksandr.suvorov@toradex.com>
Signed-off-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>
Signed-off-by: Igor Opaniuk <igor.opaniuk@toradex.com>
---

 board/toradex/apalis-tk1/pinmux-config-apalis-tk1.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/board/toradex/apalis-tk1/pinmux-config-apalis-tk1.h b/board/toradex/apalis-tk1/pinmux-config-apalis-tk1.h
index 1584d9b2d3..d2d24c4391 100644
--- a/board/toradex/apalis-tk1/pinmux-config-apalis-tk1.h
+++ b/board/toradex/apalis-tk1/pinmux-config-apalis-tk1.h
@@ -39,7 +39,7 @@ static const struct tegra_gpio_config apalis_tk1_gpio_inits[] = {
 	GPIO_INIT(R,    1,   OUT0), /* Shift_CTRL_Dir_In[1] */
 	GPIO_INIT(R,    2,   OUT0), /* Shift_CTRL_OE[3] */
 	GPIO_INIT(S,    3,   OUT0), /* Shift_CTRL_Dir_In[2] */
-	GPIO_INIT(U,    4,   OUT1),
+	GPIO_INIT(U,    4,   OUT0), /* RESET_MOCI_CTRL */
 	GPIO_INIT(W,    3,   IN),
 	GPIO_INIT(W,    5,   IN),
 	GPIO_INIT(BB,   0,  IN),
-- 
2.17.1

[U-Boot] [PATCH v3 02/10] apalis-tk1: set apalis gpio 8 aka fan_en

[Igor Opaniuk]

From: Igor Opaniuk <igor.opaniuk@toradex.com>

Make sure the Apalis GPIO 8 aka FAN_EN is on when using Apalis TK1
modules.

Reviewed-by: Oleksandr Suvorov <oleksandr.suvorov@toradex.com>
Signed-off-by: Igor Opaniuk <igor.opaniuk@toradex.com>
Signed-off-by: Dominik Sliwa <dominik.sliwa@toradex.com>
---

 board/toradex/apalis-tk1/apalis-tk1.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/board/toradex/apalis-tk1/apalis-tk1.c b/board/toradex/apalis-tk1/apalis-tk1.c
index b87e9e7a3e..d57c5042dd 100644
--- a/board/toradex/apalis-tk1/apalis-tk1.c
+++ b/board/toradex/apalis-tk1/apalis-tk1.c
@@ -19,6 +19,7 @@
 
 #define LAN_DEV_OFF_N	TEGRA_GPIO(O, 6)
 #define LAN_RESET_N	TEGRA_GPIO(S, 2)
+#define FAN_EN		TEGRA_GPIO(DD, 2)
 #define LAN_WAKE_N	TEGRA_GPIO(O, 5)
 #ifdef CONFIG_APALIS_TK1_PCIE_EVALBOARD_INIT
 #define PEX_PERST_N	TEGRA_GPIO(DD, 1) /* Apalis GPIO7 */
@@ -241,6 +242,15 @@ void tegra_pcie_board_port_reset(struct tegra_pcie_port *port)
 }
 #endif /* CONFIG_PCI_TEGRA */
 
+/*
+ * Enable/start PWM CPU fan
+ */
+void start_cpu_fan(void)
+{
+	gpio_request(FAN_EN, "FAN_EN");
+	gpio_direction_output(FAN_EN, 1);
+}
+
 /*
  * Backlight off before OS handover
  */
-- 
2.17.1

[U-Boot] [PATCH v3 03/10] apalis-tk1: provide proper USB vendor id

[Igor Opaniuk]

From: Igor Opaniuk <igor.opaniuk@toradex.com>

Use unified values for USB Product/Vendor numbers
when the config block is missing

Reviewed-by: Oleksandr Suvorov <oleksandr.suvorov@toradex.com>
Signed-off-by: Max Krummenacher <max.krummenacher@toradex.com>
Signed-off-by: Igor Opaniuk <igor.opaniuk@toradex.com>
---

 configs/apalis-tk1_defconfig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/configs/apalis-tk1_defconfig b/configs/apalis-tk1_defconfig
index be9d55e7d4..3c9ca9ca78 100644
--- a/configs/apalis-tk1_defconfig
+++ b/configs/apalis-tk1_defconfig
@@ -53,7 +53,7 @@ CONFIG_USB_EHCI_TEGRA=y
 CONFIG_USB_GADGET=y
 CONFIG_USB_GADGET_MANUFACTURER="Toradex"
 CONFIG_USB_GADGET_VENDOR_NUM=0x1b67
-CONFIG_USB_GADGET_PRODUCT_NUM=0xffff
+CONFIG_USB_GADGET_PRODUCT_NUM=0x4000
 CONFIG_CI_UDC=y
 CONFIG_USB_GADGET_DOWNLOAD=y
 CONFIG_OF_LIBFDT_OVERLAY=y
-- 
2.17.1

[U-Boot] [PATCH v3 04/10] apalis-tk1: enable user debug by default

[Igor Opaniuk]

From: Igor Opaniuk <igor.opaniuk@toradex.com>

Let the kernel print some debug messages when a user program
crashes due to an exception.

Reviewed-by: Oleksandr Suvorov <oleksandr.suvorov@toradex.com>
Signed-off-by: Stefan Agner <stefan.agner@toradex.com>
Signed-off-by: Igor Opaniuk <igor.opaniuk@toradex.com>
---

 include/configs/apalis-tk1.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/include/configs/apalis-tk1.h b/include/configs/apalis-tk1.h
index 9c8c8979f0..e4b4f196e6 100644
--- a/include/configs/apalis-tk1.h
+++ b/include/configs/apalis-tk1.h
@@ -94,7 +94,8 @@
 	"boot_file=uImage\0" \
 	"console=ttyS0\0" \
 	"defargs=lp0_vec=2064 at 0xf46ff000 core_edp_mv=1150 core_edp_ma=4000 " \
-		"usb_port_owner_info=2 lane_owner_info=6 emc_max_dvfs=0\0" \
+		"usb_port_owner_info=2 lane_owner_info=6 emc_max_dvfs=0 " \
+		"user_debug=30\0" \
 	"dfu_alt_info=" DFU_ALT_EMMC_INFO "\0" \
 	EMMC_BOOTCMD \
 	"fdt_board=eval\0" \
-- 
2.17.1

[U-Boot] [PATCH v3 05/10] apalis-tk1: add pcie_aspm=off to defargs

[Igor Opaniuk]

From: Igor Opaniuk <igor.opaniuk@toradex.com>

Disabling ASPM fixes incompatibilities with some PCIe cards

Reviewed-by: Oleksandr Suvorov <oleksandr.suvorov@toradex.com>
Signed-off-by: Dominik Sliwa <dominik.sliwa@toradex.com>
Signed-off-by: Igor Opaniuk <igor.opaniuk@toradex.com>
---

 include/configs/apalis-tk1.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/configs/apalis-tk1.h b/include/configs/apalis-tk1.h
index e4b4f196e6..d2ea5450bd 100644
--- a/include/configs/apalis-tk1.h
+++ b/include/configs/apalis-tk1.h
@@ -95,7 +95,7 @@
 	"console=ttyS0\0" \
 	"defargs=lp0_vec=2064 at 0xf46ff000 core_edp_mv=1150 core_edp_ma=4000 " \
 		"usb_port_owner_info=2 lane_owner_info=6 emc_max_dvfs=0 " \
-		"user_debug=30\0" \
+		"user_debug=30 pcie_aspm=off\0" \
 	"dfu_alt_info=" DFU_ALT_EMMC_INFO "\0" \
 	EMMC_BOOTCMD \
 	"fdt_board=eval\0" \
-- 
2.17.1

[U-Boot] [PATCH v3 06/10] apalis-tk1: switch to zImage

[Igor Opaniuk]

From: Igor Opaniuk <igor.opaniuk@toradex.com>

Switch to the generic compressed Kernel image type (zImage) instead of
the U-Boot specific uImage format.

Reviewed-by: Oleksandr Suvorov <oleksandr.suvorov@toradex.com>
Signed-off-by: Bhuvanchandra DV <bhuvanchandra.dv@toradex.com>
Signed-off-by: Igor Opaniuk <igor.opaniuk@toradex.com>
---

 include/configs/apalis-tk1.h | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/include/configs/apalis-tk1.h b/include/configs/apalis-tk1.h
index d2ea5450bd..ae62f00cd1 100644
--- a/include/configs/apalis-tk1.h
+++ b/include/configs/apalis-tk1.h
@@ -44,7 +44,7 @@
 #define DFU_ALT_EMMC_INFO	"apalis-tk1.img raw 0x0 0x500 mmcpart 1; " \
 				"boot part 0 1 mmcpart 0; " \
 				"rootfs part 0 2 mmcpart 0; " \
-				"uImage fat 0 1 mmcpart 0; " \
+				"zImage fat 0 1 mmcpart 0; " \
 				"tegra124-apalis-eval.dtb fat 0 1 mmcpart 0"
 
 #define EMMC_BOOTCMD \
@@ -53,7 +53,7 @@
 		"${setupargs} ${vidargs}; echo Booting from internal eMMC " \
 		"chip...; run emmcdtbload; load mmc 0:1 ${kernel_addr_r} " \
 		"${boot_file} && run fdt_fixup && " \
-		"bootm ${kernel_addr_r} - ${dtbparam}\0" \
+		"bootz ${kernel_addr_r} - ${dtbparam}\0" \
 	"emmcdtbload=setenv dtbparam; load mmc 0:1 ${fdt_addr_r} " \
 		"${soc}-apalis-${fdt_board}.dtb && " \
 		"setenv dtbparam ${fdt_addr_r}\0"
@@ -63,7 +63,7 @@
 	"nfsboot=pci enum; run setup; setenv bootargs ${defargs} ${nfsargs} " \
 		"${setupargs} ${vidargs}; echo Booting via DHCP/TFTP/NFS...; " \
 		"run nfsdtbload; dhcp ${kernel_addr_r} " \
-		"&& run fdt_fixup && bootm ${kernel_addr_r} - ${dtbparam}\0" \
+		"&& run fdt_fixup && bootz ${kernel_addr_r} - ${dtbparam}\0" \
 	"nfsdtbload=setenv dtbparam; tftp ${fdt_addr_r} " \
 		"${soc}-apalis-${fdt_board}.dtb " \
 		"&& setenv dtbparam ${fdt_addr_r}\0"
@@ -74,7 +74,7 @@
 		"${vidargs}; echo Booting from SD card in 8bit slot...; " \
 		"run sddtbload; load mmc 1:1 ${kernel_addr_r} " \
 		"${boot_file} && run fdt_fixup && " \
-		"bootm ${kernel_addr_r} - ${dtbparam}\0" \
+		"bootz ${kernel_addr_r} - ${dtbparam}\0" \
 	"sddtbload=setenv dtbparam; load mmc 1:1 ${fdt_addr_r} " \
 		"${soc}-apalis-${fdt_board}.dtb " \
 		"&& setenv dtbparam ${fdt_addr_r}\0"
@@ -85,13 +85,13 @@
 		"${usbargs} ${vidargs}; echo Booting from USB stick...; " \
 		"usb start && run usbdtbload; load usb 0:1 ${kernel_addr_r} " \
 		"${boot_file} && run fdt_fixup && " \
-		"bootm ${kernel_addr_r} - ${dtbparam}\0" \
+		"bootz ${kernel_addr_r} - ${dtbparam}\0" \
 	"usbdtbload=setenv dtbparam; load usb 0:1 ${fdt_addr_r} " \
 		"${soc}-apalis-${fdt_board}.dtb " \
 		"&& setenv dtbparam ${fdt_addr_r}\0"
 
 #define BOARD_EXTRA_ENV_SETTINGS \
-	"boot_file=uImage\0" \
+	"boot_file=zImage\0" \
 	"console=ttyS0\0" \
 	"defargs=lp0_vec=2064 at 0xf46ff000 core_edp_mv=1150 core_edp_ma=4000 " \
 		"usb_port_owner_info=2 lane_owner_info=6 emc_max_dvfs=0 " \
-- 
2.17.1

[U-Boot] [PATCH v3 07/10] apalis-tk1/t30: colibri_t30: display reset reason

[Igor Opaniuk]

From: Dominik Sliwa <dominik.sliwa@toradex.com>

Display proper reset reason after the SoC info.

Reviewed-by: Oleksandr Suvorov <oleksandr.suvorov@toradex.com>
Signed-off-by: Dominik Sliwa <dominik.sliwa@toradex.com>
Signed-off-by: Igor Opaniuk <igor.opaniuk@toradex.com>
---

 arch/arm/mach-tegra/sys_info.c | 32 ++++++++++++++++++++++----------
 1 file changed, 22 insertions(+), 10 deletions(-)

diff --git a/arch/arm/mach-tegra/sys_info.c b/arch/arm/mach-tegra/sys_info.c
index 9975f33e0b..5dc998a52b 100644
--- a/arch/arm/mach-tegra/sys_info.c
+++ b/arch/arm/mach-tegra/sys_info.c
@@ -6,24 +6,36 @@
 
 #include <common.h>
 #include <linux/ctype.h>
+#if defined(CONFIG_TEGRA124) || defined(CONFIG_TEGRA30)
+#include <asm/arch-tegra/pmc.h>
 
-static void upstring(char *s)
+static char *get_reset_cause(void)
 {
-	while (*s) {
-		*s = toupper(*s);
-		s++;
+	struct pmc_ctlr *pmc = (struct pmc_ctlr *)NV_PA_PMC_BASE;
+
+	switch (pmc->pmc_reset_status) {
+	case 0x00:
+		return "POR";
+	case 0x01:
+		return "WATCHDOG";
+	case 0x02:
+		return "SENSOR";
+	case 0x03:
+		return "SW_MAIN";
+	case 0x04:
+		return "LP0";
 	}
+	return "UNKNOWN";
 }
+#endif
 
 /* Print CPU information */
 int print_cpuinfo(void)
 {
-	char soc_name[10];
-
-	strncpy(soc_name, CONFIG_SYS_SOC, 10);
-	upstring(soc_name);
-	puts(soc_name);
-	puts("\n");
+	printf("SoC: %s\n", CONFIG_SYS_SOC);
+#if defined(CONFIG_TEGRA124) || defined(CONFIG_TEGRA30)
+	printf("Reset cause: %s\n", get_reset_cause());
+#endif
 
 	/* TBD: Add printf of major/minor rev info, stepping, etc. */
 	return 0;
-- 
2.17.1

[U-Boot] [PATCH v3 08/10] apalis-tk1: remove default vesa vga mode from vidargs

[Igor Opaniuk]

From: Marcel Ziswiler <marcel.ziswiler@toradex.com>

Remove video=tegrafb0:640x480-16 at 60 aka VESA VGA mode from vidargs in
order for the panel specification in the device tree to be used. This
causes the default to be the 10.1" LVDS display which will be available
in the Toradex webshop shortly.

Reviewed-by: Oleksandr Suvorov <oleksandr.suvorov@toradex.com>
Signed-off-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>
Signed-off-by: Igor Opaniuk <igor.opaniuk@toradex.com>
---

 include/configs/apalis-tk1.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/configs/apalis-tk1.h b/include/configs/apalis-tk1.h
index ae62f00cd1..869b2a8bd6 100644
--- a/include/configs/apalis-tk1.h
+++ b/include/configs/apalis-tk1.h
@@ -119,7 +119,7 @@
 		"load ${interface} ${drive}:1 ${loadaddr} flash_blk.img && " \
 		"source ${loadaddr}\0" \
 	USB_BOOTCMD \
-	"vidargs=video=tegrafb0:640x480-16 at 60 fbcon=map:1\0"
+	"vidargs=fbcon=map:1\0"
 
 /* Increase console I/O buffer size */
 #undef CONFIG_SYS_CBSIZE
-- 
2.17.1

[U-Boot] [PATCH v3 09/10] apalis-tk1: support v1.2 hardware revision

[Igor Opaniuk]

From: Marcel Ziswiler <marcel.ziswiler@toradex.com>

Support the V1.2 hardware revision with the following pin muxing
changes:

Ddc_scl_pv4 and ddc_sda_pv5 previously used as Apalis GPIO3 and GPIO4
are now used as DDC pins.

Gen2_i2c_scl_pt5 and gen2_i2c_sda_pt6 previously used as DDC pins are
now used as USB power enable signals.

Usb_vbus_en0_pn4 and usb_vbus_en1_pn5 previously used as USB power
enable signals are now used as GPIO3 and GPIO4.

Additionally a new device tree file tegra124-apalis-v1.2-eval.dtb is
loaded on V1.2 and later modules and resp. USB power enable signals
activated.

Signed-off-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>
Signed-off-by: Igor Opaniuk <igor.opaniuk@toradex.com>
---

 arch/arm/dts/tegra124-apalis.dts              | 89 ++++++++++---------
 board/toradex/apalis-tk1/apalis-tk1.c         | 37 ++++++++
 .../apalis-tk1/pinmux-config-apalis-tk1.h     | 19 ++--
 configs/apalis-tk1_defconfig                  |  2 +-
 include/configs/apalis-tk1.h                  | 12 ++-
 5 files changed, 103 insertions(+), 56 deletions(-)

diff --git a/arch/arm/dts/tegra124-apalis.dts b/arch/arm/dts/tegra124-apalis.dts
index a962c0a2f0..08184ab3ac 100644
--- a/arch/arm/dts/tegra124-apalis.dts
+++ b/arch/arm/dts/tegra124-apalis.dts
@@ -1,5 +1,5 @@
 /*
- * Copyright 2016 Toradex AG
+ * Copyright 2016-2019 Toradex AG
  *
  * This file is dual-licensed: you can use it either under the terms
  * of the GPL or the X11 license, at your option. Note that this dual
@@ -230,19 +230,21 @@
 			};
 
 			/* Apalis GPIO */
-			ddc_scl_pv4 {
-				nvidia,pins = "ddc_scl_pv4";
+			usb_vbus_en0_pn4 {
+				nvidia,pins = "usb_vbus_en0_pn4";
 				nvidia,function = "rsvd2";
 				nvidia,pull = <TEGRA_PIN_PULL_NONE>;
 				nvidia,tristate = <TEGRA_PIN_DISABLE>;
 				nvidia,enable-input = <TEGRA_PIN_ENABLE>;
+				nvidia,open-drain = <TEGRA_PIN_DISABLE>;
 			};
-			ddc_sda_pv5 {
-				nvidia,pins = "ddc_sda_pv5";
+			usb_vbus_en1_pn5 {
+				nvidia,pins = "usb_vbus_en1_pn5";
 				nvidia,function = "rsvd2";
 				nvidia,pull = <TEGRA_PIN_PULL_NONE>;
 				nvidia,tristate = <TEGRA_PIN_DISABLE>;
 				nvidia,enable-input = <TEGRA_PIN_ENABLE>;
+				nvidia,open-drain = <TEGRA_PIN_DISABLE>;
 			};
 			pex_l0_rst_n_pdd1 {
 				nvidia,pins = "pex_l0_rst_n_pdd1";
@@ -333,40 +335,40 @@
 				nvidia,open-drain = <TEGRA_PIN_ENABLE>;
 			};
 
-			/* Apalis I2C2 (DDC) */
-			gen2_i2c_scl_pt5 {
-				nvidia,pins = "gen2_i2c_scl_pt5";
-				nvidia,function = "i2c2";
+			/* Apalis I2C3 (CAM) */
+			cam_i2c_scl_pbb1 {
+				nvidia,pins = "cam_i2c_scl_pbb1";
+				nvidia,function = "i2c3";
 				nvidia,pull = <TEGRA_PIN_PULL_NONE>;
 				nvidia,tristate = <TEGRA_PIN_DISABLE>;
 				nvidia,enable-input = <TEGRA_PIN_ENABLE>;
 				nvidia,open-drain = <TEGRA_PIN_ENABLE>;
 			};
-			gen2_i2c_sda_pt6 {
-				nvidia,pins = "gen2_i2c_sda_pt6";
-				nvidia,function = "i2c2";
+			cam_i2c_sda_pbb2 {
+				nvidia,pins = "cam_i2c_sda_pbb2";
+				nvidia,function = "i2c3";
 				nvidia,pull = <TEGRA_PIN_PULL_NONE>;
 				nvidia,tristate = <TEGRA_PIN_DISABLE>;
 				nvidia,enable-input = <TEGRA_PIN_ENABLE>;
 				nvidia,open-drain = <TEGRA_PIN_ENABLE>;
 			};
 
-			/* Apalis I2C3 (CAM) */
-			cam_i2c_scl_pbb1 {
-				nvidia,pins = "cam_i2c_scl_pbb1";
-				nvidia,function = "i2c3";
+			/* Apalis I2C4 (DDC) */
+			ddc_scl_pv4 {
+				nvidia,pins = "ddc_scl_pv4";
+				nvidia,function = "i2c4";
 				nvidia,pull = <TEGRA_PIN_PULL_NONE>;
 				nvidia,tristate = <TEGRA_PIN_DISABLE>;
 				nvidia,enable-input = <TEGRA_PIN_ENABLE>;
-				nvidia,open-drain = <TEGRA_PIN_ENABLE>;
+				nvidia,rcv-sel = <TEGRA_PIN_DISABLE>;
 			};
-			cam_i2c_sda_pbb2 {
-				nvidia,pins = "cam_i2c_sda_pbb2";
-				nvidia,function = "i2c3";
+			ddc_sda_pv5 {
+				nvidia,pins = "ddc_sda_pv5";
+				nvidia,function = "i2c4";
 				nvidia,pull = <TEGRA_PIN_PULL_NONE>;
 				nvidia,tristate = <TEGRA_PIN_DISABLE>;
 				nvidia,enable-input = <TEGRA_PIN_ENABLE>;
-				nvidia,open-drain = <TEGRA_PIN_ENABLE>;
+				nvidia,rcv-sel = <TEGRA_PIN_DISABLE>;
 			};
 
 			/* Apalis MMC1 */
@@ -470,12 +472,12 @@
 				nvidia,tristate = <TEGRA_PIN_DISABLE>;
 				nvidia,enable-input = <TEGRA_PIN_DISABLE>;
 			};
-			/* PWM3 active on pu6 being Apalis BKL1_PWM */
+			/* PWM3 active on pu6 being Apalis BKL1_PWM as well */
 			ph3 {
 				nvidia,pins = "ph3";
-				nvidia,function = "gmi";
-				nvidia,pull = <TEGRA_PIN_PULL_DOWN>;
-				nvidia,tristate = <TEGRA_PIN_ENABLE>;
+				nvidia,function = "pwm3";
+				nvidia,pull = <TEGRA_PIN_PULL_NONE>;
+				nvidia,tristate = <TEGRA_PIN_DISABLE>;
 				nvidia,enable-input = <TEGRA_PIN_DISABLE>;
 			};
 
@@ -736,8 +738,8 @@
 			};
 
 			/* Apalis USBH_EN */
-			usb_vbus_en1_pn5 {
-				nvidia,pins = "usb_vbus_en1_pn5";
+			gen2_i2c_sda_pt6 {
+				nvidia,pins = "gen2_i2c_sda_pt6";
 				nvidia,function = "rsvd2";
 				nvidia,pull = <TEGRA_PIN_PULL_NONE>;
 				nvidia,tristate = <TEGRA_PIN_DISABLE>;
@@ -755,8 +757,8 @@
 			};
 
 			/* Apalis USBO1_EN */
-			usb_vbus_en0_pn4 {
-				nvidia,pins = "usb_vbus_en0_pn4";
+			gen2_i2c_scl_pt5 {
+				nvidia,pins = "gen2_i2c_scl_pt5";
 				nvidia,function = "rsvd2";
 				nvidia,pull = <TEGRA_PIN_PULL_NONE>;
 				nvidia,tristate = <TEGRA_PIN_DISABLE>;
@@ -1501,10 +1503,14 @@
 				nvidia,tristate = <TEGRA_PIN_ENABLE>;
 				nvidia,enable-input = <TEGRA_PIN_DISABLE>;
 			};
-			pv0 { /* NC */
+			/*
+			 * PCB Version Indication: V1.2 and later have GPIO_PV0
+			 * wired to GND, was NC before
+			 */
+			pv0 {
 				nvidia,pins = "pv0";
 				nvidia,function = "rsvd1";
-				nvidia,pull = <TEGRA_PIN_PULL_DOWN>;
+				nvidia,pull = <TEGRA_PIN_PULL_UP>;
 				nvidia,tristate = <TEGRA_PIN_ENABLE>;
 				nvidia,enable-input = <TEGRA_PIN_DISABLE>;
 			};
@@ -1630,13 +1636,7 @@
 		};
 	};
 
-	/*
-	 * GEN2_I2C: I2C2_SDA/SCL (DDC) on MXM3 pin 205/207 (e.g. display EDID)
-	 */
-	hdmi_ddc: i2c at 7000c400 {
-		status = "okay";
-		clock-frequency = <10000>;
-	};
+	/* GEN2_I2C: unused */
 
 	/*
 	 * CAM_I2C: I2C3_SDA/SCL (CAM) on MXM3 pin 201/203 (e.g. camera sensor
@@ -1647,7 +1647,14 @@
 		clock-frequency = <400000>;
 	};
 
-	/* I2C4 (DDC): unused */
+	/*
+	 * I2C4 (DDC): I2C4_SDA/SCL (DDC) on MXM3 pin 205/207
+	 * (e.g. display EDID)
+	 */
+	hdmi_ddc: i2c at 7000c700 {
+		status = "okay";
+		clock-frequency = <10000>;
+	};
 
 	/* PWR_I2C: power I2C to audio codec, PMIC and temperature sensor */
 	i2c at 7000d000 {
@@ -2112,7 +2119,7 @@
 		regulator-name = "VCC_USBO1";
 		regulator-min-microvolt = <5000000>;
 		regulator-max-microvolt = <5000000>;
-		gpio = <&gpio TEGRA_GPIO(N, 4) GPIO_ACTIVE_HIGH>;
+		gpio = <&gpio TEGRA_GPIO(T, 5) GPIO_ACTIVE_HIGH>;
 		enable-active-high;
 		vin-supply = <&reg_5v0>;
 	};
@@ -2123,7 +2130,7 @@
 		regulator-name = "VCC_USBH(2A|2C|2D|3|4)";
 		regulator-min-microvolt = <5000000>;
 		regulator-max-microvolt = <5000000>;
-		gpio = <&gpio TEGRA_GPIO(N, 5) GPIO_ACTIVE_HIGH>;
+		gpio = <&gpio TEGRA_GPIO(T, 6) GPIO_ACTIVE_HIGH>;
 		enable-active-high;
 		vin-supply = <&reg_5v0>;
 	};
diff --git a/board/toradex/apalis-tk1/apalis-tk1.c b/board/toradex/apalis-tk1/apalis-tk1.c
index d57c5042dd..beb7e10dfe 100644
--- a/board/toradex/apalis-tk1/apalis-tk1.c
+++ b/board/toradex/apalis-tk1/apalis-tk1.c
@@ -10,6 +10,7 @@
 #include <asm/io.h>
 #include <asm/arch/gpio.h>
 #include <asm/arch/pinmux.h>
+#include <environment.h>
 #include <pci_tegra.h>
 #include <power/as3722.h>
 #include <power/pmic.h>
@@ -25,6 +26,10 @@
 #define PEX_PERST_N	TEGRA_GPIO(DD, 1) /* Apalis GPIO7 */
 #define RESET_MOCI_CTRL	TEGRA_GPIO(U, 4)
 #endif /* CONFIG_APALIS_TK1_PCIE_EVALBOARD_INIT */
+#define VCC_USBH	TEGRA_GPIO(T, 6)
+#define VCC_USBH_V1_0	TEGRA_GPIO(N, 5)
+#define VCC_USBO1	TEGRA_GPIO(T, 5)
+#define VCC_USBO1_V1_0	TEGRA_GPIO(N, 4)
 
 int arch_misc_init(void)
 {
@@ -32,6 +37,38 @@ int arch_misc_init(void)
 	    NVBOOTTYPE_RECOVERY)
 		printf("USB recovery mode\n");
 
+	/* PCB Version Indication: V1.2 and later have GPIO_PV0 wired to GND */
+	gpio_request(TEGRA_GPIO(V, 0), "PCB Version Indication");
+	gpio_direction_input(TEGRA_GPIO(V, 0));
+	if (gpio_get_value(TEGRA_GPIO(V, 0))) {
+		/*
+		 * if using the default device tree for new V1.2 and later HW,
+		 * use version for older V1.0 and V1.1 HW
+		 */
+		char *fdt_env = env_get("fdt_module");
+
+		if (fdt_env && !strcmp(FDT_MODULE, fdt_env)) {
+			env_set("fdt_module", FDT_MODULE_V1_0);
+			printf("patching fdt_module to " FDT_MODULE_V1_0
+			       " for older V1.0 and V1.1 HW\n");
+#ifndef CONFIG_ENV_IS_NOWHERE
+			env_save();
+#endif
+		}
+
+		/* activate USB power enable GPIOs */
+		gpio_request(VCC_USBH_V1_0, "VCC_USBH");
+		gpio_direction_output(VCC_USBH_V1_0, 1);
+		gpio_request(VCC_USBO1_V1_0, "VCC_USBO1");
+		gpio_direction_output(VCC_USBO1_V1_0, 1);
+	} else {
+		/* activate USB power enable GPIOs */
+		gpio_request(VCC_USBH, "VCC_USBH");
+		gpio_direction_output(VCC_USBH, 1);
+		gpio_request(VCC_USBO1, "VCC_USBO1");
+		gpio_direction_output(VCC_USBO1, 1);
+	}
+
 	return 0;
 }
 
diff --git a/board/toradex/apalis-tk1/pinmux-config-apalis-tk1.h b/board/toradex/apalis-tk1/pinmux-config-apalis-tk1.h
index d2d24c4391..6778a41e07 100644
--- a/board/toradex/apalis-tk1/pinmux-config-apalis-tk1.h
+++ b/board/toradex/apalis-tk1/pinmux-config-apalis-tk1.h
@@ -1,6 +1,6 @@
 /* SPDX-License-Identifier: GPL-2.0+ */
 /*
- * Copyright (c) 2016, Toradex, Inc.
+ * Copyright (c) 2016-2019, Toradex, Inc.
  */
 
 #ifndef _PINMUX_CONFIG_APALIS_TK1_H_
@@ -24,8 +24,6 @@ static const struct tegra_gpio_config apalis_tk1_gpio_inits[] = {
 	GPIO_INIT(K,    2,   IN),
 	GPIO_INIT(K,    7,   IN),
 	GPIO_INIT(N,    2,   OUT1),
-	GPIO_INIT(N,    4,   OUT1),
-	GPIO_INIT(N,    5,   OUT1),
 	GPIO_INIT(N,    7,   IN),
 	GPIO_INIT(O,    5,   IN),
 	GPIO_INIT(Q,    0,   OUT0), /* Shift_CTRL_OE[0] */
@@ -40,6 +38,7 @@ static const struct tegra_gpio_config apalis_tk1_gpio_inits[] = {
 	GPIO_INIT(R,    2,   OUT0), /* Shift_CTRL_OE[3] */
 	GPIO_INIT(S,    3,   OUT0), /* Shift_CTRL_Dir_In[2] */
 	GPIO_INIT(U,    4,   OUT0), /* RESET_MOCI_CTRL */
+	GPIO_INIT(V,    0,   IN),
 	GPIO_INIT(W,    3,   IN),
 	GPIO_INIT(W,    5,   IN),
 	GPIO_INIT(BB,   0,  IN),
@@ -130,8 +129,8 @@ static const struct pmux_pingrp_config apalis_tk1_pingrps[] = {
 	PINCFG(DAP1_DIN_PN1,           RSVD4,        DOWN,   TRISTATE, OUTPUT,  DEFAULT, DEFAULT),
 	PINCFG(DAP1_DOUT_PN2,          SATA,         NORMAL, NORMAL,   OUTPUT,  DEFAULT, DEFAULT),
 	PINCFG(DAP1_SCLK_PN3,          RSVD4,        DOWN,   TRISTATE, OUTPUT,  DEFAULT, DEFAULT),
-	PINCFG(USB_VBUS_EN0_PN4,       RSVD2,        NORMAL, NORMAL,   OUTPUT,  DISABLE, DEFAULT),
-	PINCFG(USB_VBUS_EN1_PN5,       RSVD2,        NORMAL, NORMAL,   OUTPUT,  DISABLE, DEFAULT),
+	PINCFG(USB_VBUS_EN0_PN4,       RSVD2,        NORMAL, NORMAL,   INPUT,   DISABLE, DEFAULT),
+	PINCFG(USB_VBUS_EN1_PN5,       RSVD2,        NORMAL, NORMAL,   INPUT,   DISABLE, DEFAULT),
 	PINCFG(HDMI_INT_PN7,           RSVD1,        DOWN,   TRISTATE, INPUT,   DEFAULT, NORMAL),
 	PINCFG(ULPI_DATA7_PO0,         ULPI,         DOWN,   TRISTATE, OUTPUT,  DEFAULT, DEFAULT),
 	PINCFG(ULPI_DATA0_PO1,         ULPI,         DOWN,   TRISTATE, OUTPUT,  DEFAULT, DEFAULT),
@@ -175,8 +174,8 @@ static const struct pmux_pingrp_config apalis_tk1_pingrps[] = {
 	PINCFG(KB_ROW15_PS7,           RSVD2,        DOWN,   TRISTATE, OUTPUT,  DEFAULT, DEFAULT),
 	PINCFG(KB_ROW16_PT0,           RSVD2,        DOWN,   TRISTATE, OUTPUT,  DEFAULT, DEFAULT),
 	PINCFG(KB_ROW17_PT1,           RSVD2,        DOWN,   TRISTATE, OUTPUT,  DEFAULT, DEFAULT),
-	PINCFG(GEN2_I2C_SCL_PT5,       I2C2,         NORMAL, NORMAL,   INPUT,   ENABLE,  DEFAULT),
-	PINCFG(GEN2_I2C_SDA_PT6,       I2C2,         NORMAL, NORMAL,   INPUT,   ENABLE,  DEFAULT),
+	PINCFG(GEN2_I2C_SCL_PT5,       RSVD2,        NORMAL, NORMAL,   OUTPUT,  DISABLE, DEFAULT),
+	PINCFG(GEN2_I2C_SDA_PT6,       RSVD2,        NORMAL, NORMAL,   OUTPUT,  DISABLE, DEFAULT),
 	PINCFG(SDMMC4_CMD_PT7,         SDMMC4,       UP,     NORMAL,   INPUT,   DEFAULT, DEFAULT),
 	PINCFG(PU0,                    UARTA,        NORMAL, NORMAL,   OUTPUT,  DEFAULT, DEFAULT),
 	PINCFG(PU1,                    UARTA,        NORMAL, TRISTATE, INPUT,   DEFAULT, DEFAULT),
@@ -185,12 +184,12 @@ static const struct pmux_pingrp_config apalis_tk1_pingrps[] = {
 	PINCFG(PU4,                    GMI,          NORMAL, NORMAL,   OUTPUT,  DEFAULT, DEFAULT),
 	PINCFG(PU5,                    GMI,          DOWN,   TRISTATE, OUTPUT,  DEFAULT, DEFAULT),
 	PINCFG(PU6,                    PWM3,         NORMAL, NORMAL,   OUTPUT,  DEFAULT, DEFAULT),
-	PINCFG(PV0,                    RSVD1,        DOWN,   TRISTATE, OUTPUT,  DEFAULT, DEFAULT),
+	PINCFG(PV0,                    RSVD1,        UP,     NORMAL,   INPUT,   DEFAULT, DEFAULT),
 	PINCFG(PV1,                    RSVD1,        DOWN,   TRISTATE, OUTPUT,  DEFAULT, DEFAULT),
 	PINCFG(SDMMC3_CD_N_PV2,        RSVD3,        UP,     TRISTATE, INPUT,   DEFAULT, DEFAULT),
 	PINCFG(SDMMC1_WP_N_PV3,        SDMMC1,       UP,     TRISTATE, INPUT,   DEFAULT, DEFAULT),
-	PINCFG(DDC_SCL_PV4,            RSVD2,        NORMAL, NORMAL,   INPUT,   DEFAULT, DEFAULT),
-	PINCFG(DDC_SDA_PV5,            RSVD2,        NORMAL, NORMAL,   INPUT,   DEFAULT, DEFAULT),
+	PINCFG(DDC_SCL_PV4,            I2C4,         NORMAL, NORMAL,   INPUT,   DEFAULT, NORMAL),
+	PINCFG(DDC_SDA_PV5,            I2C4,         NORMAL, NORMAL,   INPUT,   DEFAULT, NORMAL),
 	PINCFG(GPIO_W2_AUD_PW2,        SPI2,         NORMAL, NORMAL,   OUTPUT,  DEFAULT, DEFAULT),
 	PINCFG(GPIO_W3_AUD_PW3,        SPI6,         NORMAL, TRISTATE, INPUT,   DEFAULT, DEFAULT),
 	PINCFG(DAP_MCLK1_PW4,          EXTPERIPH1,   NORMAL, NORMAL,   OUTPUT,  DEFAULT, DEFAULT),
diff --git a/configs/apalis-tk1_defconfig b/configs/apalis-tk1_defconfig
index 3c9ca9ca78..536505f991 100644
--- a/configs/apalis-tk1_defconfig
+++ b/configs/apalis-tk1_defconfig
@@ -7,7 +7,7 @@ CONFIG_TARGET_APALIS_TK1=y
 CONFIG_FIT=y
 CONFIG_OF_SYSTEM_SETUP=y
 CONFIG_BOOTDELAY=1
-CONFIG_BOOTCOMMAND="run emmcboot; setenv fdtfile ${soc}-apalis-${fdt_board}.dtb && run distro_bootcmd"
+CONFIG_BOOTCOMMAND="run emmcboot; setenv fdtfile ${soc}-${fdt-module}-${fdt_board}.dtb && run distro_bootcmd"
 CONFIG_CONSOLE_MUX=y
 CONFIG_SYS_STDIO_DEREGISTER=y
 CONFIG_VERSION_VARIABLE=y
diff --git a/include/configs/apalis-tk1.h b/include/configs/apalis-tk1.h
index 869b2a8bd6..65a2bd4e4a 100644
--- a/include/configs/apalis-tk1.h
+++ b/include/configs/apalis-tk1.h
@@ -18,6 +18,9 @@
 #define CONFIG_TEGRA_ENABLE_UARTA
 #define CONFIG_SYS_NS16550_COM1		NV_PA_APB_UARTA_BASE
 
+#define FDT_MODULE			"apalis-v1.2"
+#define FDT_MODULE_V1_0			"apalis"
+
 /* Environment in eMMC, before config block at the end of 1st "boot sector" */
 #define CONFIG_ENV_OFFSET		(-CONFIG_ENV_SIZE + \
 					 CONFIG_TDX_CFG_BLOCK_OFFSET)
@@ -55,7 +58,7 @@
 		"${boot_file} && run fdt_fixup && " \
 		"bootz ${kernel_addr_r} - ${dtbparam}\0" \
 	"emmcdtbload=setenv dtbparam; load mmc 0:1 ${fdt_addr_r} " \
-		"${soc}-apalis-${fdt_board}.dtb && " \
+		"${soc}-${fdt_module}-${fdt_board}.dtb && " \
 		"setenv dtbparam ${fdt_addr_r}\0"
 
 #define NFS_BOOTCMD \
@@ -65,7 +68,7 @@
 		"run nfsdtbload; dhcp ${kernel_addr_r} " \
 		"&& run fdt_fixup && bootz ${kernel_addr_r} - ${dtbparam}\0" \
 	"nfsdtbload=setenv dtbparam; tftp ${fdt_addr_r} " \
-		"${soc}-apalis-${fdt_board}.dtb " \
+		"${soc}-${fdt_module}-${fdt_board}.dtb " \
 		"&& setenv dtbparam ${fdt_addr_r}\0"
 
 #define SD_BOOTCMD \
@@ -76,7 +79,7 @@
 		"${boot_file} && run fdt_fixup && " \
 		"bootz ${kernel_addr_r} - ${dtbparam}\0" \
 	"sddtbload=setenv dtbparam; load mmc 1:1 ${fdt_addr_r} " \
-		"${soc}-apalis-${fdt_board}.dtb " \
+		"${soc}-${fdt_module}-${fdt_board}.dtb " \
 		"&& setenv dtbparam ${fdt_addr_r}\0"
 
 #define USB_BOOTCMD \
@@ -87,7 +90,7 @@
 		"${boot_file} && run fdt_fixup && " \
 		"bootz ${kernel_addr_r} - ${dtbparam}\0" \
 	"usbdtbload=setenv dtbparam; load usb 0:1 ${fdt_addr_r} " \
-		"${soc}-apalis-${fdt_board}.dtb " \
+		"${soc}-${fdt_module}-${fdt_board}.dtb " \
 		"&& setenv dtbparam ${fdt_addr_r}\0"
 
 #define BOARD_EXTRA_ENV_SETTINGS \
@@ -100,6 +103,7 @@
 	EMMC_BOOTCMD \
 	"fdt_board=eval\0" \
 	"fdt_fixup=;\0" \
+	"fdt_module=" FDT_MODULE "\0" \
 	NFS_BOOTCMD \
 	SD_BOOTCMD \
 	"setethupdate=if env exists ethaddr; then; else setenv ethaddr " \
-- 
2.17.1

[U-Boot] [PATCH v3 10/10] apalis-tk1: remove non-esential power rails on boot

[Igor Opaniuk]

From: Dominik Sliwa <dominik.sliwa@toradex.com>

When mainline kernels reboot TK1 they use SW_RESET,
that reset mode does not reset PMIC. Some rails
need to be off for RAM Re-repair to work correctly.

Reviewed-by: Oleksandr Suvorov <oleksandr.suvorov@toradex.com>
Signed-off-by: Dominik Sliwa <dominik.sliwa@toradex.com>
Signed-off-by: Igor Opaniuk <igor.opaniuk@toradex.com>
---

 arch/arm/mach-tegra/tegra124/cpu.c     | 45 ++++++++++++++++++++++++++
 board/toradex/apalis-tk1/as3722_init.c | 23 +++++++++++++
 2 files changed, 68 insertions(+)

diff --git a/arch/arm/mach-tegra/tegra124/cpu.c b/arch/arm/mach-tegra/tegra124/cpu.c
index 992c0beb04..abc050c27b 100644
--- a/arch/arm/mach-tegra/tegra124/cpu.c
+++ b/arch/arm/mach-tegra/tegra124/cpu.c
@@ -238,6 +238,45 @@ static bool is_partition_powered(u32 partid)
 	return !!(reg & (1 << partid));
 }
 
+static void unpower_partition(u32 partid)
+{
+	struct pmc_ctlr *pmc = (struct pmc_ctlr *)NV_PA_PMC_BASE;
+
+	debug("%s: part ID = %08X\n", __func__, partid);
+	/* Is the partition on? */
+	if (is_partition_powered(partid)) {
+		/* Yes, toggle the partition power state (ON -> OFF) */
+		debug("power_partition, toggling state\n");
+		writel(START_CP | partid, &pmc->pmc_pwrgate_toggle);
+
+		/* Wait for the power to come down */
+		while (is_partition_powered(partid))
+			;
+
+		/* Give I/O signals time to stabilize */
+		udelay(IO_STABILIZATION_DELAY);
+	}
+}
+
+void unpower_cpus(void)
+{
+	debug("%s entry: G cluster\n", __func__);
+
+	/* Power down the fast cluster rail partition */
+	debug("%s: CRAIL\n", __func__);
+	unpower_partition(CRAIL);
+
+	/* Power down the fast cluster non-CPU partition */
+	debug("%s: C0NC\n", __func__);
+	unpower_partition(C0NC);
+
+	/* Power down the fast cluster CPU0 partition */
+	debug("%s: CE0\n", __func__);
+	unpower_partition(CE0);
+
+	debug("%s: done\n", __func__);
+}
+
 static void power_partition(u32 partid)
 {
 	struct pmc_ctlr *pmc = (struct pmc_ctlr *)NV_PA_PMC_BASE;
@@ -284,6 +323,12 @@ void start_cpu(u32 reset_vector)
 
 	debug("%s entry, reset_vector = %x\n", __func__, reset_vector);
 
+	/*
+	 * High power clusters are on after software reset,
+	 * it may interfere with tegra124_ram_repair.
+	 * unpower them.
+	 */
+	unpower_cpus();
 	tegra124_init_clocks();
 
 	/* Set power-gating timer multiplier */
diff --git a/board/toradex/apalis-tk1/as3722_init.c b/board/toradex/apalis-tk1/as3722_init.c
index bd754e5fcf..15f8dce2f1 100644
--- a/board/toradex/apalis-tk1/as3722_init.c
+++ b/board/toradex/apalis-tk1/as3722_init.c
@@ -43,6 +43,29 @@ void pmic_enable_cpu_vdd(void)
 	udelay(10 * 1000);
 #endif
 
+	/*
+	 * Make sure all non-fused regulators are down.
+	 * That way we're in known state after software reboot from linux
+	 */
+	tegra_i2c_ll_write_addr(AS3722_I2C_ADDR, 2);
+	tegra_i2c_ll_write_data(0x0003, I2C_SEND_2_BYTES);
+	udelay(10 * 1000);
+	tegra_i2c_ll_write_addr(AS3722_I2C_ADDR, 2);
+	tegra_i2c_ll_write_data(0x0004, I2C_SEND_2_BYTES);
+	udelay(10 * 1000);
+	tegra_i2c_ll_write_addr(AS3722_I2C_ADDR, 2);
+	tegra_i2c_ll_write_data(0x001b, I2C_SEND_2_BYTES);
+	udelay(10 * 1000);
+	tegra_i2c_ll_write_addr(AS3722_I2C_ADDR, 2);
+	tegra_i2c_ll_write_data(0x0014, I2C_SEND_2_BYTES);
+	udelay(10 * 1000);
+	tegra_i2c_ll_write_addr(AS3722_I2C_ADDR, 2);
+	tegra_i2c_ll_write_data(0x001a, I2C_SEND_2_BYTES);
+	udelay(10 * 1000);
+	tegra_i2c_ll_write_addr(AS3722_I2C_ADDR, 2);
+	tegra_i2c_ll_write_data(0x0019, I2C_SEND_2_BYTES);
+	udelay(10 * 1000);
+
 	debug("%s: Setting VDD_CPU to 1.0V via AS3722 reg 0/4D\n", __func__);
 	/*
 	 * Bring up VDD_CPU via the AS3722 PMIC on the PWR I2C bus.
-- 
2.17.1