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From: "\"David Müller (ELSOFT AG)\"" <d.mueller@elsoft.ch>
To: u-boot@lists.denx.de
Subject: [U-Boot] U-boot hangs on imx6 pci driver
Date: Fri, 30 May 2014 09:04:50 +0200	[thread overview]
Message-ID: <53882D92.6020708@elsoft.ch> (raw)
In-Reply-To: <CAOMZO5AaqOjnJ1ncZb09QfUg2eBPwhDi8wMiipVTtK45X_kKWA@mail.gmail.com>

Fabio Estevam wrote:
> On Wed, May 28, 2014 at 4:40 AM, "David M?ller (ELSOFT AG)"
> <d.mueller@elsoft.ch> wrote:
>> I use an additional delay in imx6_add_pcie_port() as a workaround so far.
> 
> How much of additional delay? Could you please share your patch?

diff --git a/drivers/pci/host/pci-imx6.c b/drivers/pci/host/pci-imx6.c
index ee08250..1accc0e 100644
--- a/drivers/pci/host/pci-imx6.c
+++ b/drivers/pci/host/pci-imx6.c
@@ -503,6 +532,9 @@ static int imx6_add_pcie_port(struct pcie_port *pp,
 	pp->root_bus_nr = -1;
 	pp->ops = &imx6_pcie_host_ops;

+	/* FIXME  kernel hangs without this delay */
+	usleep_range(20000, 25000);
+
 	spin_lock_init(&pp->conf_lock);
 	ret = dw_pcie_host_init(pp);
 	if (ret) {


Dave

  reply	other threads:[~2014-05-30  7:04 UTC|newest]

Thread overview: 22+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-05-27 12:30 [U-Boot] U-boot hangs on imx6 pci driver Fabio Estevam
2014-05-27 13:25 ` Marek Vasut
2014-05-27 14:43   ` "David Müller (ELSOFT AG)"
2014-05-27 14:56     ` Marek Vasut
2014-05-28  7:40       ` "David Müller (ELSOFT AG)"
2014-05-28 16:43         ` Fabio Estevam
2014-05-30  7:04           ` "David Müller (ELSOFT AG)" [this message]
2014-06-05  0:16             ` Tim Harvey
2014-06-05  6:30               ` "David Müller (ELSOFT AG)"
2014-06-05 10:13                 ` Tim Harvey
2014-06-20  0:11                   ` Marek Vasut
2014-06-05 15:27               ` Fabio Estevam
2014-06-05 17:53                 ` Marek Vasut
2014-06-05 19:20                   ` Fabio Estevam
2014-06-05 22:04                     ` Marek Vasut
2014-06-05 22:14                       ` Fabio Estevam
2014-06-05 22:15                         ` Marek Vasut
2014-06-06  4:35                 ` Tim Harvey
2014-06-17 14:14                   ` Fabio Estevam
2014-06-20  0:22                     ` Marek Vasut
2014-05-28 16:42 ` Fabio Estevam
2014-05-28 18:31   ` Marek Vasut

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