diff --git a/drivers/reset/Kconfig b/drivers/reset/Kconfig index 9863fb30584c..5fcfdd3957c5 100644 --- a/drivers/reset/Kconfig +++ b/drivers/reset/Kconfig @@ -73,6 +73,13 @@ config RESET_IMX7 help This enables the reset controller driver for i.MX7 SoCs. +config RESET_IMX_HDMIMIX + bool "i.MX HDMIMIX Reset Driver" if COMPILE_TEST + depends on HAS_IOMEM + default ARCH_MXC + help + This enables the hdmimix reset controller driver for i.MX8MP. + config RESET_LANTIQ bool "Lantiq XWAY Reset Driver" if COMPILE_TEST default SOC_TYPE_XWAY diff --git a/drivers/reset/Makefile b/drivers/reset/Makefile index f3ae62d95be9..c2cc3a40f8ab 100644 --- a/drivers/reset/Makefile +++ b/drivers/reset/Makefile @@ -11,6 +11,7 @@ obj-$(CONFIG_RESET_BRCMSTB) += reset-brcmstb.o obj-$(CONFIG_RESET_DISPMIX) += reset-dispmix.o obj-$(CONFIG_RESET_HSDK) += reset-hsdk.o obj-$(CONFIG_RESET_IMX7) += reset-imx7.o +obj-$(CONFIG_RESET_IMX_HDMIMIX) += reset-imx-hdmimix.o obj-$(CONFIG_RESET_LANTIQ) += reset-lantiq.o obj-$(CONFIG_RESET_GPIO) += gpio-reset.o obj-$(CONFIG_RESET_LPC18XX) += reset-lpc18xx.o diff --git a/drivers/reset/reset-imx-hdmimix.c b/drivers/reset/reset-imx-hdmimix.c new file mode 100644 index 000000000000..a32db54ff13a --- /dev/null +++ b/drivers/reset/reset-imx-hdmimix.c @@ -0,0 +1,164 @@ +// SPDX-License-Identifier: (GPL-2.0+ OR MIT) +/* + * Copyright 2020 NXP + * + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define IMX_HDMIMIX_RESET_CTL0_REG 0x20 + +#define IMX_HDMIMIX_RESET_CTL0_TX_TRNG_RESETN (1 << 20) +#define IMX_HDMIMIX_RESET_CTL0_VID_LINK_SLV_RESETN (1 << 22) +#define IMX_HDMIMIX_RESET_CTL0_PAI_RESETN (1 << 18) +#define IMX_HDMIMIX_RESET_CTL0_IRQ_STEER_RESETN (1 << 16) +#define IMX_HDMIMIX_RESET_CTL0_TX_KSV_MEM_RESETN (1 << 13) +#define IMX_HDMIMIX_RESET_CTL0_TX_PHY_PRESETN (1 << 12) +#define IMX_HDMIMIX_RESET_CTL0_TX_APBRSTZ (1 << 11) +#define IMX_HDMIMIX_RESET_CTL0_TX_RSTZ (1 << 10) +#define IMX_HDMIMIX_RESET_CTL0_FDCC_HDMI_RESETN (1 << 7) +#define IMX_HDMIMIX_RESET_CTL0_FDCC_RESETN (1 << 6) +#define IMX_HDMIMIX_RESET_CTL0_LCDIF_APB_RESETN (1 << 5) +#define IMX_HDMIMIX_RESET_CTL0_LCDIF_ASYNC_RESETN (1 << 4) +#define IMX_HDMIMIX_RESET_CTL0_NOC_RESETN (1 << 0) + +struct imx_hdmimix_reset_data { + void __iomem *base; + struct reset_controller_dev rcdev; + spinlock_t lock; +}; + +static int imx_hdmimix_reset_set(struct reset_controller_dev *rcdev, + unsigned long id, bool assert) +{ + struct imx_hdmimix_reset_data *drvdata = container_of(rcdev, + struct imx_hdmimix_reset_data, rcdev); + void __iomem *reg_addr = drvdata->base + IMX_HDMIMIX_RESET_CTL0_REG; + unsigned long flags; + unsigned int val; + u32 reg; + + switch (id) { + case IMX_HDMIMIX_HDMI_TX_RESET: + val = IMX_HDMIMIX_RESET_CTL0_TX_APBRSTZ | + IMX_HDMIMIX_RESET_CTL0_TX_RSTZ | + IMX_HDMIMIX_RESET_CTL0_FDCC_HDMI_RESETN | + IMX_HDMIMIX_RESET_CTL0_FDCC_RESETN; + break; + case IMX_HDMIMIX_HDMI_PHY_RESET: + val = IMX_HDMIMIX_RESET_CTL0_TX_PHY_PRESETN; + break; + case IMX_HDMIMIX_HDMI_PAI_RESET: + val = IMX_HDMIMIX_RESET_CTL0_PAI_RESETN; + break; + case IMX_HDMIMIX_HDMI_PVI_RESET: + val = IMX_HDMIMIX_RESET_CTL0_VID_LINK_SLV_RESETN; + break; + case IMX_HDMIMIX_HDMI_TRNG_RESET: + val = IMX_HDMIMIX_RESET_CTL0_TX_TRNG_RESETN; + break; + case IMX_HDMIMIX_IRQ_STEER_RESET: + val = IMX_HDMIMIX_RESET_CTL0_IRQ_STEER_RESETN; + break; + case IMX_HDMIMIX_HDMI_HDCP_RESET: + val = IMX_HDMIMIX_RESET_CTL0_TX_KSV_MEM_RESETN; + break; + case IMX_HDMIMIX_LCDIF_RESET: + val = IMX_HDMIMIX_RESET_CTL0_LCDIF_APB_RESETN | + IMX_HDMIMIX_RESET_CTL0_LCDIF_ASYNC_RESETN | + IMX_HDMIMIX_RESET_CTL0_NOC_RESETN; + break; + default: + return -EINVAL; + } + + if (assert) { + pm_runtime_get_sync(rcdev->dev); + spin_lock_irqsave(&drvdata->lock, flags); + reg = readl(reg_addr); + writel(reg & ~val, reg_addr); + spin_unlock_irqrestore(&drvdata->lock, flags); + } else { + spin_lock_irqsave(&drvdata->lock, flags); + reg = readl(reg_addr); + writel(reg | val, reg_addr); + spin_unlock_irqrestore(&drvdata->lock, flags); + pm_runtime_put(rcdev->dev); + } + reg = readl(reg_addr); + + return 0; +} + +static int imx_hdmimix_reset_assert(struct reset_controller_dev *rcdev, + unsigned long id) +{ + return imx_hdmimix_reset_set(rcdev, id, true); +} + +static int imx_hdmimix_reset_deassert(struct reset_controller_dev *rcdev, + unsigned long id) +{ + return imx_hdmimix_reset_set(rcdev, id, false); +} + +static int imx_hdmimix_reset(struct reset_controller_dev *rcdev, + unsigned long id) +{ + imx_hdmimix_reset_set(rcdev, id, true); + return imx_hdmimix_reset_set(rcdev, id, false); +} + +static const struct reset_control_ops imx_hdmimix_reset_ops = { + .reset = imx_hdmimix_reset, + .assert = imx_hdmimix_reset_assert, + .deassert = imx_hdmimix_reset_deassert, +}; + +static int imx_hdmimix_reset_probe(struct platform_device *pdev) +{ + struct imx_hdmimix_reset_data *drvdata; + struct device *dev = &pdev->dev; + + drvdata = devm_kzalloc(&pdev->dev, sizeof(*drvdata), GFP_KERNEL); + if (drvdata == NULL) + return -ENOMEM; + + drvdata->base = dev_get_drvdata(dev->parent); + + platform_set_drvdata(pdev, drvdata); + + pm_runtime_enable(dev); + + spin_lock_init(&drvdata->lock); + + drvdata->rcdev.owner = THIS_MODULE; + drvdata->rcdev.nr_resets = IMX_HDMIMIX_RESET_NUM; + drvdata->rcdev.ops = &imx_hdmimix_reset_ops; + drvdata->rcdev.of_node = dev->of_node; + drvdata->rcdev.dev = dev; + + return devm_reset_controller_register(dev, &drvdata->rcdev); +} + +static const struct of_device_id imx_hdmimix_reset_dt_ids[] = { + { .compatible = "fsl,imx8mp-hdmimix-reset", }, + { /* sentinel */ }, +}; + +static struct platform_driver imx_hdmimix_reset_driver = { + .probe = imx_hdmimix_reset_probe, + .driver = { + .name = KBUILD_MODNAME, + .of_match_table = imx_hdmimix_reset_dt_ids, + }, +}; +module_platform_driver(imx_hdmimix_reset_driver); diff --git a/include/dt-bindings/reset/imx-hdmimix-reset.h b/include/dt-bindings/reset/imx-hdmimix-reset.h new file mode 100644 index 000000000000..6a6f726a0923 --- /dev/null +++ b/include/dt-bindings/reset/imx-hdmimix-reset.h @@ -0,0 +1,21 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright 2020 NXP. + */ + +#ifndef DT_BINDING_RESET_IMX_HDMIMIX_H +#define DT_BINDING_RESET_IMX_HDMIMIX_H + +#define IMX_HDMIMIX_HDMI_TX_RESET 0x0 +#define IMX_HDMIMIX_HDMI_PHY_RESET 0x1 +#define IMX_HDMIMIX_HDMI_PAI_RESET 0x2 +#define IMX_HDMIMIX_HDMI_PVI_RESET 0x3 +#define IMX_HDMIMIX_HDMI_TRNG_RESET 0x4 +#define IMX_HDMIMIX_IRQ_STEER_RESET 0x5 +#define IMX_HDMIMIX_HDMI_HDCP_RESET 0x6 +#define IMX_HDMIMIX_LCDIF_RESET 0x7 + +#define IMX_HDMIMIX_RESET_NUM 8 + +#endif +