diff options
| author | Saranya Gopal <saranya.gopal@intel.com> | 2019-08-29 14:55:59 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-09-03 16:56:03 +0300 |
| commit | 6ed151f264841d5d3453e2c68c7e711b639ccde5 (patch) | |
| tree | 1c4d53c72cf2c7c139485afb08b50933ac40d1d1 /drivers/usb | |
| parent | a0a465569b45e3690be155c96fb54603d6904f41 (diff) | |
| download | linux-6ed151f264841d5d3453e2c68c7e711b639ccde5.tar.xz | |
xhci-ext-caps.c: Add property to disable Intel SW switch
In platforms like Cherrytrail, 'SW switch enable' bit
should not be enabled for role switch. This patch
adds a property to Intel USB Role Switch platform driver
to denote that SW switch should be disabled in
Cherrytrail devices.
Signed-off-by: Saranya Gopal <saranya.gopal@intel.com>
Signed-off-by: Balaji Manoharan <m.balaji@intel.com>
Suggested-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Link: https://lore.kernel.org/r/1567079760-24822-1-git-send-email-saranya.gopal@intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb')
| -rw-r--r-- | drivers/usb/host/xhci-ext-caps.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/drivers/usb/host/xhci-ext-caps.c b/drivers/usb/host/xhci-ext-caps.c index 399113f9fc5c..f498160df969 100644 --- a/drivers/usb/host/xhci-ext-caps.c +++ b/drivers/usb/host/xhci-ext-caps.c @@ -6,11 +6,20 @@ */ #include <linux/platform_device.h> +#include <linux/property.h> +#include <linux/pci.h> #include "xhci.h" #define USB_SW_DRV_NAME "intel_xhci_usb_sw" #define USB_SW_RESOURCE_SIZE 0x400 +#define PCI_DEVICE_ID_INTEL_CHERRYVIEW_XHCI 0x22b5 + +static const struct property_entry role_switch_props[] = { + PROPERTY_ENTRY_BOOL("sw_switch_disable"), + {}, +}; + static void xhci_intel_unregister_pdev(void *arg) { platform_device_unregister(arg); @@ -21,6 +30,7 @@ static int xhci_create_intel_xhci_sw_pdev(struct xhci_hcd *xhci, u32 cap_offset) struct usb_hcd *hcd = xhci_to_hcd(xhci); struct device *dev = hcd->self.controller; struct platform_device *pdev; + struct pci_dev *pci = to_pci_dev(dev); struct resource res = { 0, }; int ret; @@ -43,6 +53,14 @@ static int xhci_create_intel_xhci_sw_pdev(struct xhci_hcd *xhci, u32 cap_offset) return ret; } + if (pci->device == PCI_DEVICE_ID_INTEL_CHERRYVIEW_XHCI) { + ret = platform_device_add_properties(pdev, role_switch_props); + if (ret) { + dev_err(dev, "failed to register device properties\n"); + return ret; + } + } + pdev->dev.parent = dev; ret = platform_device_add(pdev); |