Current de-assert reset is not sufficient for the USB PHY reset on some Canyonlands platforms. The patch adds an assert/de-assert sequence. This addresses a USB detection problem for devices attached prior to power-up. The delay lengths are needed for power to the PHY to stabilize.
Signed-off-by: Jeff Mann <[email protected]> Signed-off-by: Dave Mitchell <[email protected]> Acked-by: Tirumala Reddy Marri <[email protected]> --- board/amcc/canyonlands/canyonlands.c | 5 ++++- 1 files changed, 4 insertions(+), 1 deletions(-) diff --git a/board/amcc/canyonlands/canyonlands.c b/board/amcc/canyonlands/canyonlands.c index 13a0dac..bef12ae 100644 --- a/board/amcc/canyonlands/canyonlands.c +++ b/board/amcc/canyonlands/canyonlands.c @@ -177,8 +177,11 @@ int board_early_init_f(void) /* Remove NOR-FLASH, NAND-FLASH & EEPROM hardware write protection */ out_8((void *)CONFIG_SYS_BCSR_BASE + 5, 0); - /* Enable USB host & USB-OTG */ + /* Enable USB host & USB-OTG;force assert,then de-assert PHY reset */ + out_8((void *)CONFIG_SYS_BCSR_BASE + 7, 1); + mdelay(100); out_8((void *)CONFIG_SYS_BCSR_BASE + 7, 0); + mdealy(100); mtsdr(SDR0_SRST1, 0); /* Pull AHB out of reset default=1 */ -- 1.6.3.2 _______________________________________________ U-Boot mailing list [email protected] http://lists.denx.de/mailman/listinfo/u-boot
