ARM: imx6: DHCOM i.MX6 PDK: enable pad pull ups of SS lines of spi used for boot

It turned out that after a reset the boot process from the spi bootflash is
disturbed by other spi slave devices connected to DHCOM SPI1, which uses the
same spi interface with a different SS line.

Therefore the pad pull ups are enabled.

Signed-off-by: Ludwig Zenz <lzenz@dh-electronics.com>

diff --git a/board/dhelectronics/dh_imx6/dh_imx6_spl.c b/board/dhelectronics/dh_imx6/dh_imx6_spl.c
index b49296104283111c84ede426dec8ef6f07b68684..1b7acc8df7eb94f7a241661ba3c10652fdb6972f 100644 (file)
--- a/board/dhelectronics/dh_imx6/dh_imx6_spl.c
+++ b/board/dhelectronics/dh_imx6/dh_imx6_spl.c
@@ -440,8 +440,13 @@ static void setup_iomux_sd(void)
 
 /* SPI */
 static iomux_v3_cfg_t const ecspi1_pads[] = {
-       /* SS0 */
-       IOMUX_PADS(PAD_EIM_EB2__GPIO2_IO30      | MUX_PAD_CTRL(SPI_PAD_CTRL)),
+       /* SS0 - SS of boot flash */
+       IOMUX_PADS(PAD_EIM_EB2__GPIO2_IO30      |
+               MUX_PAD_CTRL(SPI_PAD_CTRL | PAD_CTL_PUS_100K_UP)),
+       /* SS2 - SS of DHCOM SPI1 */
+       IOMUX_PADS(PAD_KEY_ROW2__GPIO4_IO11     |
+               MUX_PAD_CTRL(SPI_PAD_CTRL | PAD_CTL_PUS_100K_UP)),
+
        IOMUX_PADS(PAD_EIM_D17__ECSPI1_MISO     | MUX_PAD_CTRL(SPI_PAD_CTRL)),
        IOMUX_PADS(PAD_EIM_D18__ECSPI1_MOSI     | MUX_PAD_CTRL(SPI_PAD_CTRL)),
        IOMUX_PADS(PAD_EIM_D16__ECSPI1_SCLK     | MUX_PAD_CTRL(SPI_PAD_CTRL)),