[PATCH] ARM: OMAP2+: Use srst_udelay for USB on dm814x
From: tony@atomide.com (Tony Lindgren)
Date: 2016-03-02 01:55:02
Also in:
linux-omap
Subsystem:
arm port, omap hwmod data, omap2+ support, the rest · Maintainers:
Russell King, Paul Walmsley, Aaro Koskinen, Andreas Kemnade, Kevin Hilman, Roger Quadros, Tony Lindgren, Linus Torvalds
Without this booting t410 can fail randomly with no output depending on the .config options chosen. Enabling debug_ll causes the problem to go away. I narrowed this down to USB by disabling one module at a time. Cc: Paul Walmsley <paul@pwsan.com> Signed-off-by: Tony Lindgren <tony@atomide.com> --- arch/arm/mach-omap2/omap_hwmod_81xx_data.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/arch/arm/mach-omap2/omap_hwmod_81xx_data.c b/arch/arm/mach-omap2/omap_hwmod_81xx_data.c
index 39736ad..df83277 100644
--- a/arch/arm/mach-omap2/omap_hwmod_81xx_data.c
+++ b/arch/arm/mach-omap2/omap_hwmod_81xx_data.c@@ -582,9 +582,11 @@ static struct omap_hwmod_ocp_if dm81xx_alwon_l3_slow__gpmc = { .user = OCP_USER_MPU, }; +/* USB needs udelay 1 after reset at least on hp t410, use 2 for margin */ static struct omap_hwmod_class_sysconfig dm81xx_usbhsotg_sysc = { .rev_offs = 0x0, .sysc_offs = 0x10, + .srst_udelay = 2, .sysc_flags = SYSC_HAS_SIDLEMODE | SYSC_HAS_MIDLEMODE | SYSC_HAS_SOFTRESET, .idlemodes = SIDLE_SMART | MSTANDBY_FORCE | MSTANDBY_SMART,
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2.7.0