blob: 6a721a934a74b2edd735892da7f746dc59e30507 [file] [log] [blame]
// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2022 Marek Vasut <marex@denx.de>
*/
#include <common.h>
#include <asm/io.h>
#include <clk.h>
#include <dm.h>
#include <dm/device.h>
#include <dm/device_compat.h>
#include <power-domain-uclass.h>
#include <dt-bindings/power/imx8mp-power.h>
#define GPR_REG0 0x0
#define PCIE_CLOCK_MODULE_EN BIT(0)
#define USB_CLOCK_MODULE_EN BIT(1)
struct imx8mp_hsiomix_priv {
void __iomem *base;
struct clk clk_usb;
struct power_domain pd_bus;
struct power_domain pd_usb;
struct power_domain pd_usb_phy1;
struct power_domain pd_usb_phy2;
};
static int imx8mp_hsiomix_on(struct power_domain *power_domain)
{
struct udevice *dev = power_domain->dev;
struct imx8mp_hsiomix_priv *priv = dev_get_priv(dev);
struct power_domain *domain;
int ret;
ret = power_domain_on(&priv->pd_bus);
if (ret)
return ret;
if (power_domain->id == IMX8MP_HSIOBLK_PD_USB) {
domain = &priv->pd_usb;
} else if (power_domain->id == IMX8MP_HSIOBLK_PD_USB_PHY1) {
domain = &priv->pd_usb_phy1;
} else if (power_domain->id == IMX8MP_HSIOBLK_PD_USB_PHY2) {
domain = &priv->pd_usb_phy2;
} else {
ret = -EINVAL;
goto err_pd;
}
ret = power_domain_on(domain);
if (ret)
goto err_pd;
ret = clk_enable(&priv->clk_usb);
if (ret)
goto err_clk;
if (power_domain->id == IMX8MP_HSIOBLK_PD_USB)
setbits_le32(priv->base + GPR_REG0, USB_CLOCK_MODULE_EN);
return 0;
err_clk:
power_domain_off(domain);
err_pd:
power_domain_off(&priv->pd_bus);
return ret;
}
static int imx8mp_hsiomix_off(struct power_domain *power_domain)
{
struct udevice *dev = power_domain->dev;
struct imx8mp_hsiomix_priv *priv = dev_get_priv(dev);
if (power_domain->id == IMX8MP_HSIOBLK_PD_USB)
clrbits_le32(priv->base + GPR_REG0, USB_CLOCK_MODULE_EN);
clk_disable(&priv->clk_usb);
if (power_domain->id == IMX8MP_HSIOBLK_PD_USB)
power_domain_off(&priv->pd_usb);
else if (power_domain->id == IMX8MP_HSIOBLK_PD_USB_PHY1)
power_domain_off(&priv->pd_usb_phy1);
else if (power_domain->id == IMX8MP_HSIOBLK_PD_USB_PHY2)
power_domain_off(&priv->pd_usb_phy2);
power_domain_off(&priv->pd_bus);
return 0;
}
static int imx8mp_hsiomix_of_xlate(struct power_domain *power_domain,
struct ofnode_phandle_args *args)
{
power_domain->id = args->args[0];
return 0;
}
static int imx8mp_hsiomix_probe(struct udevice *dev)
{
struct imx8mp_hsiomix_priv *priv = dev_get_priv(dev);
int ret;
priv->base = dev_read_addr_ptr(dev);
ret = clk_get_by_name(dev, "usb", &priv->clk_usb);
if (ret < 0)
return ret;
ret = power_domain_get_by_name(dev, &priv->pd_bus, "bus");
if (ret < 0)
goto err_pd_bus;
ret = power_domain_get_by_name(dev, &priv->pd_usb, "usb");
if (ret < 0)
goto err_pd_usb;
ret = power_domain_get_by_name(dev, &priv->pd_usb_phy1, "usb-phy1");
if (ret < 0)
goto err_pd_usb_phy1;
ret = power_domain_get_by_name(dev, &priv->pd_usb_phy2, "usb-phy2");
if (ret < 0)
goto err_pd_usb_phy2;
return 0;
err_pd_usb_phy2:
power_domain_free(&priv->pd_usb_phy1);
err_pd_usb_phy1:
power_domain_free(&priv->pd_usb);
err_pd_usb:
power_domain_free(&priv->pd_bus);
err_pd_bus:
clk_free(&priv->clk_usb);
return ret;
}
static const struct udevice_id imx8mp_hsiomix_ids[] = {
{ .compatible = "fsl,imx8mp-hsio-blk-ctrl" },
{ }
};
struct power_domain_ops imx8mp_hsiomix_ops = {
.on = imx8mp_hsiomix_on,
.off = imx8mp_hsiomix_off,
.of_xlate = imx8mp_hsiomix_of_xlate,
};
U_BOOT_DRIVER(imx8mp_hsiomix) = {
.name = "imx8mp_hsiomix",
.id = UCLASS_POWER_DOMAIN,
.of_match = imx8mp_hsiomix_ids,
.probe = imx8mp_hsiomix_probe,
.priv_auto = sizeof(struct imx8mp_hsiomix_priv),
.ops = &imx8mp_hsiomix_ops,
};