diff --git a/drivers/reset/Kconfig b/drivers/reset/Kconfig index 3168ab1eea88..eda9c698a95f 100644 --- a/drivers/reset/Kconfig +++ b/drivers/reset/Kconfig @@ -73,6 +73,16 @@ config RESET_BRCMSTB_RESCAL This enables the RESCAL reset controller for SATA, PCIe0, or PCIe1 on BCM7216 or the BCM2712. +config RESET_DR1V90 + tristate "Anlogic DR1V90 reset controller" + depends on ARCH_ANLOGIC || COMPILE_TEST + depends on ANLOGIC_DR1V90_CRU + select AUXILIARY_BUS + default ARCH_ANLOGIC + help + This enables the reset controller driver for Anlogic DR1V90 SoCs + provided by the CRU unit. + config RESET_EIC7700 bool "Reset controller driver for ESWIN SoCs" depends on ARCH_ESWIN || COMPILE_TEST diff --git a/drivers/reset/Makefile b/drivers/reset/Makefile index 45ad17062462..489fafd6bbe3 100644 --- a/drivers/reset/Makefile +++ b/drivers/reset/Makefile @@ -14,6 +14,7 @@ obj-$(CONFIG_RESET_BCM6345) += reset-bcm6345.o obj-$(CONFIG_RESET_BERLIN) += reset-berlin.o obj-$(CONFIG_RESET_BRCMSTB) += reset-brcmstb.o obj-$(CONFIG_RESET_BRCMSTB_RESCAL) += reset-brcmstb-rescal.o +obj-$(CONFIG_RESET_DR1V90) += reset-dr1v90.o obj-$(CONFIG_RESET_EIC7700) += reset-eic7700.o obj-$(CONFIG_RESET_EIC7700_HSP) += reset-eic7700-hsp.o obj-$(CONFIG_RESET_EYEQ) += reset-eyeq.o diff --git a/drivers/reset/reset-dr1v90.c b/drivers/reset/reset-dr1v90.c new file mode 100644 index 000000000000..daa99c797b1a --- /dev/null +++ b/drivers/reset/reset-dr1v90.c @@ -0,0 +1,140 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (C) 2026 Junhui Liu + */ + +#include +#include +#include +#include +#include + +#include + +struct dr1v90_reset_map { + u32 offset; + u32 bit; +}; + +struct dr1v90_reset_controller { + struct reset_controller_dev rcdev; + void __iomem *base; + spinlock_t lock; /* protect register read-modify-write */ +}; + +static inline struct dr1v90_reset_controller * +to_dr1v90_reset_controller(struct reset_controller_dev *rcdev) +{ + return container_of(rcdev, struct dr1v90_reset_controller, rcdev); +} + +static const struct dr1v90_reset_map dr1v90_resets[] = { + [RESET_OCM] = { 0x74, BIT(4)}, + [RESET_QSPI] = { 0x74, BIT(5)}, + [RESET_SMC] = { 0x74, BIT(6)}, + [RESET_WDT] = { 0x74, BIT(7)}, + [RESET_DMAC_AXI] = { 0x74, BIT(8)}, + [RESET_DMAC_AHB] = { 0x74, BIT(9)}, + [RESET_NPU] = { 0x74, BIT(12)}, + [RESET_JPU] = { 0x74, BIT(13)}, + [RESET_DDRBUS] = { 0x74, BIT(14)}, + [RESET_NIC_HP0] = { 0x78, BIT(0)}, + [RESET_NIC_HP1] = { 0x78, BIT(1)}, + [RESET_NIC_GP0M] = { 0x78, BIT(4)}, + [RESET_NIC_GP1M] = { 0x78, BIT(5)}, + [RESET_GPIO] = { 0x78, BIT(8)}, + [RESET_IPC] = { 0x78, BIT(12)}, + [RESET_USB0] = { 0x7C, BIT(0)}, + [RESET_USB1] = { 0x7C, BIT(1)}, + [RESET_GBE0] = { 0x7C, BIT(4)}, + [RESET_GBE1] = { 0x7C, BIT(5)}, + [RESET_SDIO0] = { 0x7C, BIT(8)}, + [RESET_SDIO1] = { 0x7C, BIT(9)}, + [RESET_UART0] = { 0x7C, BIT(12)}, + [RESET_UART1] = { 0x7C, BIT(13)}, + [RESET_SPI0] = { 0x7C, BIT(16)}, + [RESET_SPI1] = { 0x7C, BIT(17)}, + [RESET_CAN0] = { 0x7C, BIT(20)}, + [RESET_CAN1] = { 0x7C, BIT(21)}, + [RESET_TTC0] = { 0x7C, BIT(24)}, + [RESET_TTC1] = { 0x7C, BIT(25)}, + [RESET_I2C0] = { 0x7C, BIT(28)}, + [RESET_I2C1] = { 0x7C, BIT(29)} +}; + +static int dr1v90_reset_control_update(struct reset_controller_dev *rcdev, + unsigned long id, bool assert) +{ + struct dr1v90_reset_controller *rstc = to_dr1v90_reset_controller(rcdev); + u32 offset = dr1v90_resets[id].offset; + u32 bit = dr1v90_resets[id].bit; + u32 reg; + + guard(spinlock_irqsave)(&rstc->lock); + + reg = readl(rstc->base + offset); + if (assert) + reg &= ~bit; + else + reg |= bit; + writel(reg, rstc->base + offset); + + return 0; +} + +static int dr1v90_reset_control_assert(struct reset_controller_dev *rcdev, + unsigned long id) +{ + return dr1v90_reset_control_update(rcdev, id, true); +} + +static int dr1v90_reset_control_deassert(struct reset_controller_dev *rcdev, + unsigned long id) +{ + return dr1v90_reset_control_update(rcdev, id, false); +} + +static const struct reset_control_ops dr1v90_reset_control_ops = { + .assert = dr1v90_reset_control_assert, + .deassert = dr1v90_reset_control_deassert, +}; + +static int dr1v90_reset_probe(struct auxiliary_device *adev, + const struct auxiliary_device_id *id) +{ + struct dr1v90_reset_controller *rstc; + struct device *dev = &adev->dev; + + rstc = devm_kzalloc(dev, sizeof(*rstc), GFP_KERNEL); + if (!rstc) + return -ENOMEM; + + spin_lock_init(&rstc->lock); + + rstc->base = dev->platform_data; + rstc->rcdev.dev = dev; + rstc->rcdev.nr_resets = ARRAY_SIZE(dr1v90_resets); + rstc->rcdev.of_node = dev->parent->of_node; + rstc->rcdev.ops = &dr1v90_reset_control_ops; + rstc->rcdev.owner = THIS_MODULE; + + return devm_reset_controller_register(dev, &rstc->rcdev); +} + +static const struct auxiliary_device_id dr1v90_reset_ids[] = { + { + .name = "anlogic_dr1_cru.reset" + }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(auxiliary, dr1v90_reset_ids); + +static struct auxiliary_driver dr1v90_reset_driver = { + .probe = dr1v90_reset_probe, + .id_table = dr1v90_reset_ids, +}; +module_auxiliary_driver(dr1v90_reset_driver); + +MODULE_AUTHOR("Junhui Liu "); +MODULE_DESCRIPTION("Anlogic DR1V90 reset controller driver"); +MODULE_LICENSE("GPL");