linux-kernel - [PATCH 3.10 034/103] fsl-usb: do not test for PHY_CLK

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Message-Id: <20140604232547.961299888@linuxfoundation.org>
Date:	Wed,  4 Jun 2014 16:24:57 -0700
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org,
	Nikita Yushchenko <nyushchenko@....rtsoft.ru>
Subject: [PATCH 3.10 034/103] fsl-usb: do not test for PHY_CLK_VALID bit on controller version 1.6

3.10-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Nikita Yushchenko <nyushchenko@....rtsoft.ru>

commit d183c81929beeba842b74422f754446ef2b8b49c upstream.

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@....rtsoft.ru>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/usb/host/ehci-fsl.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

--- a/drivers/usb/host/ehci-fsl.c
+++ b/drivers/usb/host/ehci-fsl.c
@@ -261,7 +261,8 @@ static int ehci_fsl_setup_phy(struct usb
 		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) &


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