[U-Boot] [PATCH v4 4/6] mvebu: usb: xhci: Add VBUS regulator supply to the host driver
kostap at marvell.com
kostap at marvell.com
Thu Feb 9 10:39:25 UTC 2017
From: Konstantin Porotchkin <kostap at marvell.com>
The USB device should linked to VBUS regulator through "vbus-supply"
DTS property.
This patch adds handling for "vbus-supply" property inside the USB
device entry for turning on the VBUS regulator upon the host adapter probe.
Signed-off-by: Konstantin Porotchkin <kostap at marvell.com>
Cc: Stefan Roese <sr at denx.de>
Cc: Marek Vasut <marex at denx.de>
Cc: Nadav Haklai <nadavh at marvell.com>
Cc: Neta Zur Hershkovits <neta at marvell.com>
Cc: Igal Liberman <igall at marvell.com>
Cc: Haim Boot <hayim at marvell.com>
---
Changes for v4:
- Move the VBUS supply handling to use regulator framework
- Select DM_REGULATOR by Kconfig for mvebu XHCI driver
doc/device-tree-bindings/usb/marvell.xhci-usb.txt | 29 +++++++++++++++++++++++
drivers/usb/host/Kconfig | 1 +
drivers/usb/host/xhci-mvebu.c | 14 ++++++++++-
3 files changed, 43 insertions(+), 1 deletion(-)
create mode 100644 doc/device-tree-bindings/usb/marvell.xhci-usb.txt
diff --git a/doc/device-tree-bindings/usb/marvell.xhci-usb.txt b/doc/device-tree-bindings/usb/marvell.xhci-usb.txt
new file mode 100644
index 0000000..cd21115
--- /dev/null
+++ b/doc/device-tree-bindings/usb/marvell.xhci-usb.txt
@@ -0,0 +1,29 @@
+Marvell SOC USB controllers
+
+This controller is integrated in Armada 3700/8K.
+It uses the same properties as a generic XHCI host controller
+
+Required properties :
+ - compatible: should be one or more of:
+ - "marvell,armada3700-xhci", "generic-xhci" for Armada 37xx SoCs
+ - "marvell,armada-8k-xhci", "generic-xhci" for Armada A8K SoCs
+ - reg: should contain address and length of the standard XHCI
+ register set for the device.
+ - interrupts: one XHCI interrupt should be described here.
+
+Optional properties:
+ - clocks: reference to a clock
+ - vbus-supply : If present, specifies the fixed regulator to be turned on
+ for providing power to the USB VBUS rail.
+
+Example:
+ cpm_usb3_0: usb3 at 500000 {
+ compatible = "marvell,armada-8k-xhci",
+ "generic-xhci";
+ reg = <0x500000 0x4000>;
+ interrupts = <GIC_SPI 62 IRQ_TYPE_LEVEL_HIGH>;
+ clocks = <&cpm_syscon0 1 22>;
+ vbus-supply = <®_usb3h0_vbus>;
+ status = "disabled";
+ };
+
diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig
index 5129a57..0bf8274 100644
--- a/drivers/usb/host/Kconfig
+++ b/drivers/usb/host/Kconfig
@@ -25,6 +25,7 @@ config USB_XHCI_MVEBU
bool "MVEBU USB 3.0 support"
default y
depends on ARCH_MVEBU
+ select DM_REGULATOR
help
Choose this option to add support for USB 3.0 driver on mvebu
SoCs, which includes Armada8K, Armada3700 and other Armada
diff --git a/drivers/usb/host/xhci-mvebu.c b/drivers/usb/host/xhci-mvebu.c
index 46eb937..35d89ab 100644
--- a/drivers/usb/host/xhci-mvebu.c
+++ b/drivers/usb/host/xhci-mvebu.c
@@ -10,6 +10,7 @@
#include <dm.h>
#include <fdtdec.h>
#include <usb.h>
+#include <power/regulator.h>
#include <asm/gpio.h>
#include "xhci.h"
@@ -44,12 +45,23 @@ static int xhci_usb_probe(struct udevice *dev)
struct mvebu_xhci_platdata *plat = dev_get_platdata(dev);
struct mvebu_xhci *ctx = dev_get_priv(dev);
struct xhci_hcor *hcor;
- int len;
+ int len, ret;
+ struct udevice *regulator;
ctx->hcd = (struct xhci_hccr *)plat->hcd_base;
len = HC_LENGTH(xhci_readl(&ctx->hcd->cr_capbase));
hcor = (struct xhci_hcor *)((uintptr_t)ctx->hcd + len);
+ ret = device_get_supply_regulator(dev, "vbus-supply", ®ulator);
+ if (!ret) {
+ ret = regulator_set_enable(regulator, true);
+ if (ret) {
+ printf("Failed to turn ON the VBUS regulator\n");
+ return ret;
+ }
+ } else
+ printf("No VBUS regulator found\n");
+
/* Enable USB xHCI (VBUS, reset etc) in board specific code */
board_xhci_enable();
--
2.7.4
More information about the U-Boot
mailing list