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phy: Add support for phy-da8xx-usb

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In preparation for supporting the musb driver, this patch
adds support for the usb phy associated with the musb driver.

Signed-off-by: Adam Ford <aford173@gmail.com>
This commit is contained in:
Adam Ford 2019-07-10 13:59:09 -05:00 committed by Marek Vasut
parent 2e8fef747b
commit fc58263d2e
3 changed files with 71 additions and 0 deletions
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6
drivers/phy/Kconfig
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@ -84,6 +84,12 @@ config BCM6368_USBH_PHY
help
Support for the Broadcom MIPS BCM6368 USBH PHY.
config PHY_DA8XX_USB
tristate "TI DA8xx USB PHY Driver"
depends on PHY && ARCH_DAVINCI
help
Enable this to support the USB PHY on DA8xx SoCs.
config PIPE3_PHY
bool "Support omap's PIPE3 PHY"
depends on PHY && ARCH_OMAP2PLUS

1
drivers/phy/Makefile
View File

@ -21,3 +21,4 @@ obj-$(CONFIG_MSM8916_USB_PHY) += msm8916-usbh-phy.o
obj-$(CONFIG_OMAP_USB2_PHY) += omap-usb2-phy.o
obj-$(CONFIG_KEYSTONE_USB_PHY) += keystone-usb-phy.o
obj-$(CONFIG_MT76X8_USB_PHY) += mt76x8-usb-phy.o
obj-$(CONFIG_PHY_DA8XX_USB) += phy-da8xx-usb.o

64
drivers/phy/phy-da8xx-usb.c Normal file
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@ -0,0 +1,64 @@
// SPDX-License-Identifier: GPL-2.0+
/*
* Based on the DA8xx "glue layer" code.
* Copyright (c) 2008-2019, MontaVista Software, Inc. <source@mvista.com>
*
* DT support added by: Adam Ford <aford173@gmail.com>
*/
#include <common.h>
#include <dm.h>
#include <dm/device-internal.h>
#include <dm/lists.h>
#include <asm/arch/hardware.h>
#include <asm/arch/da8xx-usb.h>
#include <asm/io.h>
#include <generic-phy.h>
static int da8xx_usb_phy_power_on(struct phy *phy)
{
unsigned long timeout;
clrsetbits_le32(&davinci_syscfg_regs->cfgchip2,
CFGCHIP2_RESET | CFGCHIP2_PHYPWRDN | CFGCHIP2_OTGPWRDN |
CFGCHIP2_OTGMODE | CFGCHIP2_REFFREQ,
CFGCHIP2_SESENDEN | CFGCHIP2_VBDTCTEN |
CFGCHIP2_PHY_PLLON | CFGCHIP2_REFFREQ_24MHZ);
/* wait until the usb phy pll locks */
timeout = get_timer(0);
while (get_timer(timeout) < 10) {
if (readl(&davinci_syscfg_regs->cfgchip2) & CFGCHIP2_PHYCLKGD)
return 0;
}
debug("Phy was not turned on\n");
return -ENODEV;
}
static int da8xx_usb_phy_power_off(struct phy *phy)
{
clrsetbits_le32(&davinci_syscfg_regs->cfgchip2,
CFGCHIP2_PHY_PLLON,
CFGCHIP2_PHYPWRDN | CFGCHIP2_OTGPWRDN);
return 0;
}
static const struct udevice_id da8xx_phy_ids[] = {
{ .compatible = "ti,da830-usb-phy" },
{ }
};
static struct phy_ops da8xx_phy_ops = {
.power_on = da8xx_usb_phy_power_on,
.power_off = da8xx_usb_phy_power_off,
};
U_BOOT_DRIVER(da8xx_phy) = {
.name = "da8xx-usb-phy",
.id = UCLASS_PHY,
.of_match = da8xx_phy_ids,
.ops = &da8xx_phy_ops,
};