From 898e7610c62aa6f0cc173d909a150f7b26e872bb Mon Sep 17 00:00:00 2001 From: Marek Vasut Date: Wed, 13 Apr 2022 00:42:54 +0200 Subject: [PATCH] imx: power-domain: Add i.MX8MP HSIOMIX driver 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 #imx8mp-venice-gw74xx Signed-off-by: Marek Vasut Cc: Fabio Estevam Cc: Peng Fan Cc: Stefano Babic --- drivers/power/domain/Kconfig | 7 ++ drivers/power/domain/Makefile | 1 + drivers/power/domain/imx8mp-hsiomix.c | 159 ++++++++++++++++++++++++++ 3 files changed, 167 insertions(+) create mode 100644 drivers/power/domain/imx8mp-hsiomix.c diff --git a/drivers/power/domain/Kconfig b/drivers/power/domain/Kconfig index 04fc005432..7e1b8c072f 100644 --- a/drivers/power/domain/Kconfig +++ b/drivers/power/domain/Kconfig @@ -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 diff --git a/drivers/power/domain/Makefile b/drivers/power/domain/Makefile index 7c8af67dbd..e624477621 100644 --- a/drivers/power/domain/Makefile +++ b/drivers/power/domain/Makefile @@ -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 diff --git a/drivers/power/domain/imx8mp-hsiomix.c b/drivers/power/domain/imx8mp-hsiomix.c new file mode 100644 index 0000000000..6a721a934a --- /dev/null +++ b/drivers/power/domain/imx8mp-hsiomix.c @@ -0,0 +1,159 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2022 Marek Vasut + */ + +#include +#include +#include +#include +#include +#include +#include + +#include + +#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, +}; -- 2.39.5