To clear any configurations made by U-Boot on Tegra USB controller,
reset it before init in probe.
Signed-off-by: Venu Byravarasu <[email protected]>
Acked-by: Alan Stern <[email protected]>
Acked-by: Greg Kroah-Hartman <[email protected]>
reviewed-by: Stephen Warren <[email protected]>
---
This patch was already reviewed at:
http://marc.info/?l=linux-usb&m=136203353205291&w=2
drivers/usb/host/ehci-tegra.c | 5 +++++
1 files changed, 5 insertions(+), 0 deletions(-)
diff --git a/drivers/usb/host/ehci-tegra.c b/drivers/usb/host/ehci-tegra.c
index 1d2488c..60ed5d1 100644
--- a/drivers/usb/host/ehci-tegra.c
+++ b/drivers/usb/host/ehci-tegra.c
@@ -28,6 +28,7 @@
#include <linux/pm_runtime.h>
#include <linux/usb/ehci_def.h>
#include <linux/usb/tegra_usb_phy.h>
+#include <linux/clk/tegra.h>
#define TEGRA_USB_BASE 0xC5000000
#define TEGRA_USB2_BASE 0xC5004000
@@ -691,6 +692,10 @@ static int tegra_ehci_probe(struct platform_device *pdev)
if (err)
goto fail_clk;
+ tegra_periph_reset_assert(tegra->clk);
+ udelay(1);
+ tegra_periph_reset_deassert(tegra->clk);
+
tegra->needs_double_reset = of_property_read_bool(pdev->dev.of_node,
"nvidia,needs-double-reset");
--
1.7.0.4