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imx: power-domain: Add i.MX8MP HSIOMIX driver

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Add trivial driver for i.MX8MP HSIOMIX handling. This is responsible
for enabling the GPCv2 power domains and clock for USB 3.0 and PCIe
in the correct order. Currently supported is the USB 3.0 part which
can be tested, PCIe support should be easy to add.

Tested-By: Tim Harvey <tharvey@gateworks.com> #imx8mp-venice-gw74xx
Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Fabio Estevam <festevam@gmail.com>
Cc: Peng Fan <peng.fan@nxp.com>
Cc: Stefano Babic <sbabic@denx.de>
This commit is contained in:
Marek Vasut 2022-04-13 00:42:54 +02:00 committed by Stefano Babic
parent 2e760f180d
commit 898e7610c6
3 changed files with 167 additions and 0 deletions
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7
drivers/power/domain/Kconfig
View file

@ -40,6 +40,13 @@ config IMX8M_POWER_DOMAIN
Enable support for manipulating NXP i.MX8M on-SoC power domains via
requests to the ATF.
config IMX8MP_HSIOMIX_BLKCTRL
bool "Enable i.MX8MP HSIOMIX domain driver"
depends on POWER_DOMAIN && IMX8MP
select CLK
help
Enable support for manipulating NXP i.MX8MP on-SoC HSIOMIX block controller.
config MTK_POWER_DOMAIN
bool "Enable the MediaTek power domain driver"
depends on POWER_DOMAIN && ARCH_MEDIATEK

1
drivers/power/domain/Makefile
View file

@ -8,6 +8,7 @@ obj-$(CONFIG_APPLE_PMGR_POWER_DOMAIN) += apple-pmgr.o
obj-$(CONFIG_BCM6328_POWER_DOMAIN) += bcm6328-power-domain.o
obj-$(CONFIG_IMX8_POWER_DOMAIN) += imx8-power-domain-legacy.o imx8-power-domain.o
obj-$(CONFIG_IMX8M_POWER_DOMAIN) += imx8m-power-domain.o
obj-$(CONFIG_IMX8MP_HSIOMIX_BLKCTRL) += imx8mp-hsiomix.o
obj-$(CONFIG_MTK_POWER_DOMAIN) += mtk-power-domain.o
obj-$(CONFIG_MESON_GX_VPU_POWER_DOMAIN) += meson-gx-pwrc-vpu.o
obj-$(CONFIG_MESON_EE_POWER_DOMAIN) += meson-ee-pwrc.o

159
drivers/power/domain/imx8mp-hsiomix.c Normal file
View file

@ -0,0 +1,159 @@
// 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,
};