Messages in this thread Patch in this message | | | Date | Mon, 23 Jan 2006 16:08:49 -0600 (CST) | From | Kumar Gala <> | Subject | [PATCH] USB: Disable clock for MPH ports not in use on Freescale EHCI |
| |
In some systems using the Freescale EHCI controller if only one port of the multiport host (MPH) is being used the other port must be disabled if there is no clock signal. Since we dont know how someone will wire a board, we disable the clock if the port is not enabled.
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
--- commit 984d42232fd47ddbeef7c825ec2bafbca9aed5a0 tree 166532f0cd229b1a6f090c43b3617fd49ff3068a parent 2497a5e4242d500178d6d0f0ce4ee9249a38f5dc author Kumar Gala <galak@kernel.crashing.org> Mon, 23 Jan 2006 16:13:21 -0600 committer Kumar Gala <galak@kernel.crashing.org> Mon, 23 Jan 2006 16:13:21 -0600
drivers/usb/host/ehci-fsl.c | 7 +++++++ drivers/usb/host/ehci-fsl.h | 1 + 2 files changed, 8 insertions(+), 0 deletions(-)
diff --git a/drivers/usb/host/ehci-fsl.c b/drivers/usb/host/ehci-fsl.c index f40ee41..032fa6b 100644 --- a/drivers/usb/host/ehci-fsl.c +++ b/drivers/usb/host/ehci-fsl.c @@ -161,6 +161,7 @@ static void mpc83xx_setup_phy(struct ehc unsigned int port_offset) { u32 portsc = 0; + switch (phy_mode) { case FSL_USB2_PHY_ULPI: portsc |= PORT_PTS_ULPI; @@ -175,6 +176,7 @@ static void mpc83xx_setup_phy(struct ehc portsc |= PORT_PTS_UTMI; break; case FSL_USB2_PHY_NONE: + portsc |= PORT_PHCD; break; } writel(portsc, &ehci->regs->port_status[port_offset]); @@ -209,8 +211,13 @@ static void mpc83xx_usb_setup(struct usb if (pdata->port_enables & FSL_USB2_PORT0_ENABLED) mpc83xx_setup_phy(ehci, pdata->phy_mode, 0); + else + mpc83xx_setup_phy(ehci, FSL_USB2_PHY_NONE, 0); + if (pdata->port_enables & FSL_USB2_PORT1_ENABLED) mpc83xx_setup_phy(ehci, pdata->phy_mode, 1); + else + mpc83xx_setup_phy(ehci, FSL_USB2_PHY_NONE, 1); } /* put controller in host mode. */ diff --git a/drivers/usb/host/ehci-fsl.h b/drivers/usb/host/ehci-fsl.h index caac0d1..f579254 100644 --- a/drivers/usb/host/ehci-fsl.h +++ b/drivers/usb/host/ehci-fsl.h @@ -26,6 +26,7 @@ #define PORT_PTS_ULPI (2<<30) #define PORT_PTS_SERIAL (3<<30) #define PORT_PTS_PTW (1<<28) +#define PORT_PHCD (1<<23) #define FSL_SOC_USB_PORTSC2 0x188 #define FSL_SOC_USB_USBMODE 0x1a8 #define FSL_SOC_USB_SNOOP1 0x400 /* NOTE: big-endian */ - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |