diff mbox series

[v19,4/5] usb: core: hcd: Create platform devices for onboard hubs in probe()

Message ID 20220112111028.v19.4.I7a3a7d9d2126c34079b1cab87aa0b2ec3030f9b7@changeid (mailing list archive)
State Superseded
Headers show
Series usb: misc: Add onboard_usb_hub driver | expand

Commit Message

Matthias Kaehlcke Jan. 12, 2022, 7:10 p.m. UTC
Call onboard_hub_create/destroy_pdevs() from usb_add/remove_hcd()
for primary HCDs to create/destroy platform devices for onboard
USB hubs that may be connected to the root hub of the controller.
These functions are a NOP unless CONFIG_USB_ONBOARD_HUB=y/m.

Also add a field to struct usb_hcd to keep track of the onboard hub
platform devices that are owned by the HCD.

Signed-off-by: Matthias Kaehlcke <mka@chromium.org>
---

Changes in v19:
- none

Changes in v18:
- none

Changes in v17:
- create the platform devices in the generic HCD code instead of
  the xhci_platform driver
- updated subject and commit message to reflect the above change
- dropped initialization of platform device list, which is now
  done in onboard_hub_create_pdevs()

Changes in v16:
- none

Changes in v15:
- none

Changes in v14:
- none

Changes in v13:
- added comment for 'depends on USB_ONBOARD_HUB || !USB_ONBOARD_HUB'
  construct

Changes in v12:
- none

Changes in v11:
- use onboard_hub_create/destroy_pdevs() to support multiple onboard
  hubs that are connected to the same root hub
- moved field/list to keep track of platform devices from struct
  usb_hcd to struct xhci_hcd
- updated commit message

Changes in v10:
- none

Changes in v9:
- added dependency on USB_ONBOARD_HUB (or !!USB_ONBOARD_HUB) to
  USB_XHCI_PLATFORM

Changes in v8:
- none

Changes in v7:
- none

Changes in v6:
- none

Changes in v5:
- patch added to the series

 drivers/usb/core/hcd.c  | 6 ++++++
 include/linux/usb/hcd.h | 1 +
 2 files changed, 7 insertions(+)

Comments

Doug Anderson Jan. 13, 2022, 1:03 a.m. UTC | #1
Hi,

On Wed, Jan 12, 2022 at 11:11 AM Matthias Kaehlcke <mka@chromium.org> wrote:
>
> Call onboard_hub_create/destroy_pdevs() from usb_add/remove_hcd()
> for primary HCDs to create/destroy platform devices for onboard
> USB hubs that may be connected to the root hub of the controller.
> These functions are a NOP unless CONFIG_USB_ONBOARD_HUB=y/m.
>
> Also add a field to struct usb_hcd to keep track of the onboard hub
> platform devices that are owned by the HCD.
>
> Signed-off-by: Matthias Kaehlcke <mka@chromium.org>
> ---
>
> Changes in v19:
> - none
>
> Changes in v18:
> - none
>
> Changes in v17:
> - create the platform devices in the generic HCD code instead of
>   the xhci_platform driver
> - updated subject and commit message to reflect the above change
> - dropped initialization of platform device list, which is now
>   done in onboard_hub_create_pdevs()
>
> Changes in v16:
> - none
>
> Changes in v15:
> - none
>
> Changes in v14:
> - none
>
> Changes in v13:
> - added comment for 'depends on USB_ONBOARD_HUB || !USB_ONBOARD_HUB'
>   construct
>
> Changes in v12:
> - none
>
> Changes in v11:
> - use onboard_hub_create/destroy_pdevs() to support multiple onboard
>   hubs that are connected to the same root hub
> - moved field/list to keep track of platform devices from struct
>   usb_hcd to struct xhci_hcd
> - updated commit message
>
> Changes in v10:
> - none
>
> Changes in v9:
> - added dependency on USB_ONBOARD_HUB (or !!USB_ONBOARD_HUB) to
>   USB_XHCI_PLATFORM
>
> Changes in v8:
> - none
>
> Changes in v7:
> - none
>
> Changes in v6:
> - none
>
> Changes in v5:
> - patch added to the series
>
>  drivers/usb/core/hcd.c  | 6 ++++++
>  include/linux/usb/hcd.h | 1 +
>  2 files changed, 7 insertions(+)

No changes since v17 which I gave my tag for [1], but happy to give it again:

Reviewed-by: Douglas Anderson <dianders@chromium.org>

[1] https://lore.kernel.org/r/CAD=FV=VcAdSWWVykGrw2r5BFMe4Esotb+ieggczcrY2TH-4VSA@mail.gmail.com/
Stephen Boyd Jan. 13, 2022, 3:50 a.m. UTC | #2
Quoting Matthias Kaehlcke (2022-01-12 11:10:47)
> Call onboard_hub_create/destroy_pdevs() from usb_add/remove_hcd()
> for primary HCDs to create/destroy platform devices for onboard
> USB hubs that may be connected to the root hub of the controller.
> These functions are a NOP unless CONFIG_USB_ONBOARD_HUB=y/m.
>
> Also add a field to struct usb_hcd to keep track of the onboard hub
> platform devices that are owned by the HCD.
>
> Signed-off-by: Matthias Kaehlcke <mka@chromium.org>
> ---

Reviewed-by: Stephen Boyd <swboyd@chromium.org>
diff mbox series

Patch

diff --git a/drivers/usb/core/hcd.c b/drivers/usb/core/hcd.c
index 4d326ee12c36..b8220e411e07 100644
--- a/drivers/usb/core/hcd.c
+++ b/drivers/usb/core/hcd.c
@@ -36,6 +36,7 @@ 
 #include <linux/phy/phy.h>
 #include <linux/usb.h>
 #include <linux/usb/hcd.h>
+#include <linux/usb/onboard_hub.h>
 #include <linux/usb/otg.h>
 
 #include "usb.h"
@@ -2963,6 +2964,9 @@  int usb_add_hcd(struct usb_hcd *hcd,
 	if (hcd->uses_new_polling && HCD_POLL_RH(hcd))
 		usb_hcd_poll_rh_status(hcd);
 
+	if (usb_hcd_is_primary_hcd(hcd))
+		onboard_hub_create_pdevs(hcd->self.root_hub, &hcd->onboard_hub_devs);
+
 	return retval;
 
 err_register_root_hub:
@@ -3041,6 +3045,8 @@  void usb_remove_hcd(struct usb_hcd *hcd)
 	if (usb_hcd_is_primary_hcd(hcd)) {
 		if (hcd->irq > 0)
 			free_irq(hcd->irq, hcd);
+
+		onboard_hub_destroy_pdevs(&hcd->onboard_hub_devs);
 	}
 
 	usb_deregister_bus(&hcd->self);
diff --git a/include/linux/usb/hcd.h b/include/linux/usb/hcd.h
index 548a028f2dab..4ebc91c09182 100644
--- a/include/linux/usb/hcd.h
+++ b/include/linux/usb/hcd.h
@@ -198,6 +198,7 @@  struct usb_hcd {
 	struct usb_hcd		*shared_hcd;
 	struct usb_hcd		*primary_hcd;
 
+	struct list_head	onboard_hub_devs;
 
 #define HCD_BUFFER_POOLS	4
 	struct dma_pool		*pool[HCD_BUFFER_POOLS];