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Koen Kooi
df83a59b6b
Signed-off-by: Koen Kooi <koen@dominion.thruhere.net> Signed-off-by: Denys Dmytriyenko <denys@ti.com>
39 lines
1.3 KiB
Diff
39 lines
1.3 KiB
Diff
From d8b93bb6a3ec7a8092ad0ea2a3fa78746aba6471 Mon Sep 17 00:00:00 2001
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From: Colin Ian King <colin.king@canonical.com>
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Date: Mon, 30 Jul 2012 16:06:42 +0100
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Subject: [PATCH 51/70] USB: echi-dbgp: increase the controller wait time to
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come out of halt.
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commit f96a4216e85050c0a9d41a41ecb0ae9d8e39b509 upstream.
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The default 10 microsecond delay for the controller to come out of
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halt in dbgp_ehci_startup is too short, so increase it to 1 millisecond.
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This is based on emperical testing on various USB debug ports on
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modern machines such as a Lenovo X220i and an Ivybridge development
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platform that needed to wait ~450-950 microseconds.
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Signed-off-by: Colin Ian King <colin.king@canonical.com>
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Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
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Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
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---
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drivers/usb/early/ehci-dbgp.c | 2 +-
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1 files changed, 1 insertions(+), 1 deletions(-)
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diff --git a/drivers/usb/early/ehci-dbgp.c b/drivers/usb/early/ehci-dbgp.c
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index 1fc8f12..347bb05 100644
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--- a/drivers/usb/early/ehci-dbgp.c
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+++ b/drivers/usb/early/ehci-dbgp.c
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@@ -450,7 +450,7 @@ static int dbgp_ehci_startup(void)
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writel(FLAG_CF, &ehci_regs->configured_flag);
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/* Wait until the controller is no longer halted */
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- loop = 10;
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+ loop = 1000;
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do {
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status = readl(&ehci_regs->status);
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if (!(status & STS_HALT))
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--
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1.7.7.6
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