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| author | Nikita Yushchenko <nyushchenko@dev.rtsoft.ru> | 2014-04-28 19:23:44 +0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-05-03 18:04:28 -0400 |
| commit | d183c81929beeba842b74422f754446ef2b8b49c (patch) | |
| tree | eb9a39ac4b557f66ddbfd2007c246b02f3ee7e7d /drivers/usb/host/ehci-fsl.c | |
| parent | df602c2d2358f02c6e49cffc5b49b9daa16db033 (diff) | |
| download | lwn-d183c81929beeba842b74422f754446ef2b8b49c.tar.gz lwn-d183c81929beeba842b74422f754446ef2b8b49c.zip | |
fsl-usb: do not test for PHY_CLK_VALID bit on controller version 1.6
Per reference manuals of Freescale P1020 and P2020 SoCs, USB controller
present in these SoCs has bit 17 of USBx_CONTROL register marked as
Reserved - there is no PHY_CLK_VALID bit there.
Testing for this bit in ehci_fsl_setup_phy() behaves differently on two
P1020RDB boards available here - on one board test passes and fsl-usb
init succeeds, but on other board test fails, causing fsl-usb init to
fail.
This patch changes ehci_fsl_setup_phy() not to test PHY_CLK_VALID on
controller version 1.6 that (per manual) does not have this bit.
Signed-off-by: Nikita Yushchenko <nyushchenko@dev.rtsoft.ru>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/host/ehci-fsl.c')
| -rw-r--r-- | drivers/usb/host/ehci-fsl.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/usb/host/ehci-fsl.c b/drivers/usb/host/ehci-fsl.c index 6f2c8d3899d2..cf2734b532a7 100644 --- a/drivers/usb/host/ehci-fsl.c +++ b/drivers/usb/host/ehci-fsl.c @@ -248,7 +248,8 @@ static int ehci_fsl_setup_phy(struct usb_hcd *hcd, break; } - if (pdata->have_sysif_regs && pdata->controller_ver && + if (pdata->have_sysif_regs && + pdata->controller_ver > FSL_USB_VER_1_6 && (phy_mode == FSL_USB2_PHY_ULPI)) { /* check PHY_CLK_VALID to get phy clk valid */ if (!(spin_event_timeout(in_be32(non_ehci + FSL_SOC_USB_CTRL) & |