[U-Boot] [PATCH 3/3] M28: Disable USB power on boot

[Marek Vasut]

This is a precaution to prevent some USB flash drives
from misbehaving in early boot stage.

Signed-off-by: Marek Vasut <marex at denx.de>
Cc: Wolfgang Denk <wd at denx.de>
Cc: Stefano Babic <sbabic at denx.de>
Cc: Fabio Estevam <festevam at gmail.com>
CC: Albert Aribaud <albert.u.boot at aribaud.net>
---
 board/denx/m28evk/m28evk.c   |    3 ---
 board/denx/m28evk/spl_boot.c |   11 +++++++++++
 2 files changed, 11 insertions(+), 3 deletions(-)

diff --git a/board/denx/m28evk/m28evk.c b/board/denx/m28evk/m28evk.c
index 3d28ea8..5068071 100644
--- a/board/denx/m28evk/m28evk.c
+++ b/board/denx/m28evk/m28evk.c
@@ -53,9 +53,6 @@ int board_early_init_f(void)
 	mx28_set_sspclk(MXC_SSPCLK2, 96000, 0);
 
 #ifdef	CONFIG_CMD_USB
-	mxs_iomux_setup_pad(MX28_PAD_SSP2_SS1__USB1_OVERCURRENT);
-	mxs_iomux_setup_pad(MX28_PAD_AUART3_TX__GPIO_3_13 |
-			MXS_PAD_12MA | MXS_PAD_3V3 | MXS_PAD_PULLUP);
 	gpio_direction_output(MX28_PAD_AUART3_TX__GPIO_3_13, 0);
 #endif
 
diff --git a/board/denx/m28evk/spl_boot.c b/board/denx/m28evk/spl_boot.c
index 7a12592..6b51332 100644
--- a/board/denx/m28evk/spl_boot.c
+++ b/board/denx/m28evk/spl_boot.c
@@ -214,9 +214,20 @@ const iomux_cfg_t iomux_setup[] = {
 	MX28_PAD_SSP2_MISO__SSP2_D0 | MUX_CONFIG_SSP2,
 	MX28_PAD_SSP2_SS0__SSP2_D3 |
 		(MXS_PAD_3V3 | MXS_PAD_8MA | MXS_PAD_PULLUP),
+
+	/* USB */
+	MX28_PAD_SSP2_SS1__USB1_OVERCURRENT,
+	MX28_PAD_AUART3_TX__GPIO_3_13 |
+			MXS_PAD_12MA | MXS_PAD_3V3 | MXS_PAD_PULLUP,
 };
 
 void board_init_ll(void)
 {
+	/* Powerdown the USB */
+	mxs_iomux_setup_pad(MX28_PAD_SSP2_SS1__USB1_OVERCURRENT);
+	mxs_iomux_setup_pad(MX28_PAD_AUART3_TX__GPIO_3_13 |
+			MXS_PAD_12MA | MXS_PAD_3V3 | MXS_PAD_PULLUP);
+	gpio_direction_output(MX28_PAD_AUART3_TX__GPIO_3_13, 1);
+
 	mx28_common_spl_init(iomux_setup, ARRAY_SIZE(iomux_setup));
 }
-- 
1.7.10