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usb: ehci: add ehci_port_power interface

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The current EHCI implementation is prepared to toggle the
PORT_POWER bit to enable or disable a USB-Port. In some
cases this port power can not be just toggled by the PORT_POWER
bit, and the gpio-regulator is needed to be toggled too.

This patch defines a port power control interface ehci_port_power for
ehci core use, it toggles PORT_POWER bit as well as calls platform
defined .port_power if it is defined.

Signed-off-by: Michael Grzeschik <m.grzeschik@pengutronix.de>
Signed-off-by: Peter Chen <peter.chen@freescale.com>
Acked-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Michael Grzeschik
2014-10-13 09:53:03 +08:00
committed by Greg Kroah-Hartman
parent e28e2f2f7c
commit 11a7e59405
4 changed files with 45 additions and 14 deletions
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9
drivers/usb/host/ehci-hcd.c
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@@ -311,6 +311,7 @@ static void unlink_empty_async_suspended(struct ehci_hcd *ehci);
static void ehci_work(struct ehci_hcd *ehci);
static void start_unlink_intr(struct ehci_hcd *ehci, struct ehci_qh *qh);
static void end_unlink_intr(struct ehci_hcd *ehci, struct ehci_qh *qh);
static int ehci_port_power(struct ehci_hcd *ehci, int portnum, bool enable);
#include "ehci-timer.c"
#include "ehci-hub.c"
@@ -329,9 +330,13 @@ static void ehci_turn_off_all_ports(struct ehci_hcd *ehci)
{
int port = HCS_N_PORTS(ehci->hcs_params);
while (port--)
while (port--) {
ehci_writel(ehci, PORT_RWC_BITS,
&ehci->regs->port_status[port]);
spin_unlock_irq(&ehci->lock);
ehci_port_power(ehci, port, false);
spin_lock_irq(&ehci->lock);
}
}
/*
@@ -1233,6 +1238,8 @@ void ehci_init_driver(struct hc_driver *drv,
drv->hcd_priv_size += over->extra_priv_size;
if (over->reset)
drv->reset = over->reset;
if (over->port_power)
drv->port_power = over->port_power;
}
}
EXPORT_SYMBOL_GPL(ehci_init_driver);