The host controller by itself may sometimes need to handle PHY
and/or calibrate some of the PHY settings to get full support out
of the PHY controller.
The PHY core provides a calibration funtionality now to do so.
Therefore, facilitate getting the two possible PHY types for
xhci controller, viz. USB 2.0 type (UTMI+) and USB 3.0 type (PIPE3)
from its parent.
Signed-off-by: Vivek Gautam <gautam.vi...@samsung.com>
---
drivers/usb/host/xhci-plat.c | 24 ++++++++++++++++++++++++
drivers/usb/host/xhci.h | 3 +++
2 files changed, 27 insertions(+)
diff --git a/drivers/usb/host/xhci-plat.c b/drivers/usb/host/xhci-plat.c
index 29d8adb..e7145b5 100644
--- a/drivers/usb/host/xhci-plat.c
+++ b/drivers/usb/host/xhci-plat.c
@@ -17,6 +17,7 @@
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
+#include <linux/phy/phy.h>
#include "xhci.h"
#include "xhci-mvebu.h"
@@ -183,6 +184,29 @@ static int xhci_plat_probe(struct platform_device *pdev)
}
/*
+ * Get possile USB 2.0 type PHY (UTMI+), as well as
+ * USB 3.0 type PHY (PIPE3).
+ * The host controller may need to handle PHYs by itself too
+ * sometimes, so as to calibrate it based on the need.
+ */
+ xhci->phy2_gen = devm_phy_get(&pdev->dev, "usb2-phy");
+ if (IS_ERR(xhci->phy2_gen)) {
+ ret = PTR_ERR(xhci->phy2_gen);
+ if (ret != -ENOSYS && ret != -ENODEV) {
+ dev_err(&pdev->dev, "no usb2 phy configured\n");
+ return ret;
+ }
+ }
+ xhci->phy3_gen = devm_phy_get(&pdev->dev, "usb3-phy");
+ if (IS_ERR(xhci->phy3_gen)) {
+ ret = PTR_ERR(xhci->phy3_gen);
+ if (ret != -ENOSYS && ret != -ENODEV) {
+ dev_err(&pdev->dev, "no usb3 phy configured\n");
+ return ret;
+ }
+ }
+
+ /*
* Set the xHCI pointer before xhci_plat_setup() (aka hcd_driver.reset)
* is called by usb_add_hcd().
*/
diff --git a/drivers/usb/host/xhci.h b/drivers/usb/host/xhci.h
index 9ffecd5..453d89e 100644
--- a/drivers/usb/host/xhci.h
+++ b/drivers/usb/host/xhci.h
@@ -1582,6 +1582,9 @@ struct xhci_hcd {
u32 port_status_u0;
/* Compliance Mode Timer Triggered every 2 seconds */
#define COMP_MODE_RCVRY_MSECS 2000
+ /* phys for the controller */
+ struct phy *phy2_gen;
+ struct phy *phy3_gen;
};
/* convert between an HCD pointer and the corresponding EHCI_HCD */
--
1.7.10.4
--
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