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mvebu: usb: xhci: Add VBUS regulator supply to the host driver

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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@marvell.com>
Cc: Stefan Roese <sr@denx.de>
Cc: Marek Vasut <marex@denx.de>
Cc: Nadav Haklai <nadavh@marvell.com>
Cc: Neta Zur Hershkovits <neta@marvell.com>
Cc: Igal Liberman <igall@marvell.com>
Cc: Haim Boot <hayim@marvell.com>
Acked-by: Marek Vasut <marex@denx.de>
Signed-off-by: Stefan Roese <sr@denx.de>
This commit is contained in:
Konstantin Porotchkin 2017-02-12 11:10:30 +02:00 committed by Stefan Roese
parent c10636344c
commit 81192b7966
3 changed files with 41 additions and 1 deletions
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28
doc/device-tree-bindings/usb/marvell.xhci-usb.txt Normal file
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@ -0,0 +1,28 @@
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: phandle to system controller clock driving this unit
- 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@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 = <&reg_usb3h0_vbus>;
status = "disabled";
};

1
drivers/usb/host/Kconfig
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@ -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

13
drivers/usb/host/xhci-mvebu.c
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@ -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 +45,22 @@ 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", &regulator);
if (!ret) {
ret = regulator_set_enable(regulator, true);
if (ret) {
printf("Failed to turn ON the VBUS regulator\n");
return ret;
}
}
/* Enable USB xHCI (VBUS, reset etc) in board specific code */
board_xhci_enable();