> --- a/drivers/usb/chipidea/Kconfig
> +++ b/drivers/usb/chipidea/Kconfig
> @@ -3,6 +3,8 @@ config USB_CHIPIDEA
> depends on ((USB_EHCI_HCD && USB_GADGET) || (USB_EHCI_HCD
> && !USB_GADGET) || (!USB_EHCI_HCD && USB_GADGET)) && HAS_DMA
> select EXTCON
> select RESET_CONTROLLER
> + select MULTIPLEXER
> + select MUX_GPIO
The above two configurations are only used at your specific platforms, please add
them at either your platform defconfig or the related hardware driver's Kconfig.
> help
> Say Y here if your system has a dual role high speed USB
> controller based on ChipIdea silicon IP. It supports:
> diff --git a/drivers/usb/chipidea/core.c b/drivers/usb/chipidea/core.c index
> 33ae87f..8fa0991 100644
> --- a/drivers/usb/chipidea/core.c
> +++ b/drivers/usb/chipidea/core.c
> @@ -61,6 +61,7 @@
> #include <linux/of.h>
> #include <linux/regulator/consumer.h>
> #include <linux/usb/ehci_def.h>
> +#include <linux/mux/consumer.h>
>
> #include "ci.h"
> #include "udc.h"
> @@ -687,6 +688,10 @@ static int ci_get_platdata(struct device *dev,
> if (of_find_property(dev->of_node, "non-zero-ttctrl-ttha", NULL))
> platdata->flags |= CI_HDRC_SET_NON_ZERO_TTHA;
>
> + platdata->usb_switch = devm_mux_control_get_optional(dev, "usb_switch");
> + if (IS_ERR(platdata->usb_switch))
> + return PTR_ERR(platdata->usb_switch);
> +
> ext_id = ERR_PTR(-ENODEV);
> ext_vbus = ERR_PTR(-ENODEV);
> if (of_property_read_bool(dev->of_node, "extcon")) { diff --git
> a/drivers/usb/chipidea/host.c b/drivers/usb/chipidea/host.c index af45aa32..d9d2d00
> 100644
> --- a/drivers/usb/chipidea/host.c
> +++ b/drivers/usb/chipidea/host.c
> @@ -13,6 +13,7 @@
> #include <linux/usb/hcd.h>
> #include <linux/usb/chipidea.h>
> #include <linux/regulator/consumer.h>
> +#include <linux/mux/consumer.h>
>
> #include "../host/ehci.h"
>
> @@ -161,6 +162,10 @@ static int host_start(struct ci_hdrc *ci)
> if (ci_otg_is_fsm_mode(ci)) {
> otg->host = &hcd->self;
> hcd->self.otg_port = 1;
> + } else {
> + ret = mux_control_select(ci->platdata->usb_switch, 1);
> + if (ret)
> + goto disable_reg;
What will happen if ci->platdata->usb_switch is NULL?
> }
> }
>
> @@ -181,6 +186,8 @@ static void host_stop(struct ci_hdrc *ci)
> struct usb_hcd *hcd = ci->hcd;
>
> if (hcd) {
> + if (!ci_otg_is_fsm_mode(ci))
> + mux_control_deselect(ci->platdata->usb_switch);
Ditto.
> if (ci->platdata->notify_event)
> ci->platdata->notify_event(ci,
> CI_HDRC_CONTROLLER_STOPPED_EVENT);
> diff --git a/drivers/usb/chipidea/udc.c b/drivers/usb/chipidea/udc.c index
> 9852ec5..209d3f6 100644
> --- a/drivers/usb/chipidea/udc.c
> +++ b/drivers/usb/chipidea/udc.c
> @@ -19,6 +19,7 @@
> #include <linux/usb/gadget.h>
> #include <linux/usb/otg-fsm.h>
> #include <linux/usb/chipidea.h>
> +#include <linux/mux/consumer.h>
>
> #include "ci.h"
> #include "udc.h"
> @@ -1965,16 +1966,26 @@ void ci_hdrc_gadget_destroy(struct ci_hdrc *ci)
>
> static int udc_id_switch_for_device(struct ci_hdrc *ci) {
> + int ret = 0;
> +
> if (ci->is_otg)
> /* Clear and enable BSV irq */
> hw_write_otgsc(ci, OTGSC_BSVIS | OTGSC_BSVIE,
> OTGSC_BSVIS | OTGSC_BSVIE);
>
> - return 0;
> + if (!ci_otg_is_fsm_mode(ci))
> + ret = mux_control_select(ci->platdata->usb_switch, 0);
> +
Ditto
> + if (ci->is_otg && ret)
> + hw_write_otgsc(ci, OTGSC_BSVIE | OTGSC_BSVIS,
> OTGSC_BSVIS);
> +
> + return ret;
> }
>
> static void udc_id_switch_for_host(struct ci_hdrc *ci) {
> + mux_control_deselect(ci->platdata->usb_switch);
> +
> /*
> * host doesn't care B_SESSION_VALID event
> * so clear and disbale BSV irq
> diff --git a/include/linux/usb/chipidea.h b/include/linux/usb/chipidea.h index
> 07f9936..9ea55a1 100644
> --- a/include/linux/usb/chipidea.h
> +++ b/include/linux/usb/chipidea.h
> @@ -10,6 +10,7 @@
> #include <linux/usb/otg.h>
>
> struct ci_hdrc;
> +struct mux_control;
>
> /**
> * struct ci_hdrc_cable - structure for external connector cable state tracking @@ -
> 76,6 +77,7 @@ struct ci_hdrc_platform_data {
> /* VBUS and ID signal state tracking, using extcon framework */
> struct ci_hdrc_cable vbus_extcon;
> struct ci_hdrc_cable id_extcon;
> + struct mux_control *usb_switch;
> u32 phy_clkgate_delay_us;
If CONFIG_USB_CHIPIDEA_HOST is not defined, it may cause build error
Peter
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