diff options
Diffstat (limited to 'drivers/reset')
| -rw-r--r-- | drivers/reset/Kconfig | 30 | ||||
| -rw-r--r-- | drivers/reset/Makefile | 5 | ||||
| -rw-r--r-- | drivers/reset/reset-axs10x.c | 83 | ||||
| -rw-r--r-- | drivers/reset/reset-meson.c | 65 | ||||
| -rw-r--r-- | drivers/reset/reset-simple.c | 186 | ||||
| -rw-r--r-- | drivers/reset/reset-simple.h | 45 | ||||
| -rw-r--r-- | drivers/reset/reset-socfpga.c | 157 | ||||
| -rw-r--r-- | drivers/reset/reset-stm32.c | 108 | ||||
| -rw-r--r-- | drivers/reset/reset-sunxi.c | 104 | ||||
| -rw-r--r-- | drivers/reset/reset-uniphier.c | 30 | ||||
| -rw-r--r-- | drivers/reset/reset-zx2967.c | 99 |
11 files changed, 425 insertions, 487 deletions
diff --git a/drivers/reset/Kconfig b/drivers/reset/Kconfig index e2baecb..7fc7769 100644 --- a/drivers/reset/Kconfig +++ b/drivers/reset/Kconfig @@ -28,6 +28,12 @@ config RESET_ATH79 This enables the ATH79 reset controller driver that supports the AR71xx SoC reset controller. +config RESET_AXS10X + bool "AXS10x Reset Driver" if COMPILE_TEST + default ARC_PLAT_AXS10X + help + This enables the reset controller driver for AXS10x. + config RESET_BERLIN bool "Berlin Reset Driver" if COMPILE_TEST default ARCH_BERLIN @@ -75,21 +81,21 @@ config RESET_PISTACHIO help This enables the reset driver for ImgTec Pistachio SoCs. -config RESET_SOCFPGA - bool "SoCFPGA Reset Driver" if COMPILE_TEST - default ARCH_SOCFPGA +config RESET_SIMPLE + bool "Simple Reset Controller Driver" if COMPILE_TEST + default ARCH_SOCFPGA || ARCH_STM32 || ARCH_STRATIX10 || ARCH_SUNXI || ARCH_ZX help - This enables the reset controller driver for Altera SoCFPGAs. + This enables a simple reset controller driver for reset lines that + that can be asserted and deasserted by toggling bits in a contiguous, + exclusive register space. -config RESET_STM32 - bool "STM32 Reset Driver" if COMPILE_TEST - default ARCH_STM32 - help - This enables the RCC reset controller driver for STM32 MCUs. + Currently this driver supports Altera SoCFPGAs, the RCC reset + controller in STM32 MCUs, Allwinner SoCs, and ZTE's zx2967 family. config RESET_SUNXI bool "Allwinner SoCs Reset Driver" if COMPILE_TEST && !ARCH_SUNXI default ARCH_SUNXI + select RESET_SIMPLE help This enables the reset driver for Allwinner SoCs. @@ -121,12 +127,6 @@ config RESET_UNIPHIER Say Y if you want to control reset signals provided by System Control block, Media I/O block, Peripheral Block. -config RESET_ZX2967 - bool "ZTE ZX2967 Reset Driver" - depends on ARCH_ZX || COMPILE_TEST - help - This enables the reset controller driver for ZTE's zx2967 family. - config RESET_ZYNQ bool "ZYNQ Reset Driver" if COMPILE_TEST default ARCH_ZYNQ diff --git a/drivers/reset/Makefile b/drivers/reset/Makefile index c1fd702..132c24f 100644 --- a/drivers/reset/Makefile +++ b/drivers/reset/Makefile @@ -5,6 +5,7 @@ obj-$(CONFIG_ARCH_STI) += sti/ obj-$(CONFIG_ARCH_TEGRA) += tegra/ obj-$(CONFIG_RESET_A10SR) += reset-a10sr.o obj-$(CONFIG_RESET_ATH79) += reset-ath79.o +obj-$(CONFIG_RESET_AXS10X) += reset-axs10x.o obj-$(CONFIG_RESET_BERLIN) += reset-berlin.o obj-$(CONFIG_RESET_HSDK) += reset-hsdk.o obj-$(CONFIG_RESET_IMX7) += reset-imx7.o @@ -13,12 +14,10 @@ obj-$(CONFIG_RESET_LPC18XX) += reset-lpc18xx.o obj-$(CONFIG_RESET_MESON) += reset-meson.o obj-$(CONFIG_RESET_OXNAS) += reset-oxnas.o obj-$(CONFIG_RESET_PISTACHIO) += reset-pistachio.o -obj-$(CONFIG_RESET_SOCFPGA) += reset-socfpga.o -obj-$(CONFIG_RESET_STM32) += reset-stm32.o +obj-$(CONFIG_RESET_SIMPLE) += reset-simple.o obj-$(CONFIG_RESET_SUNXI) += reset-sunxi.o obj-$(CONFIG_RESET_TI_SCI) += reset-ti-sci.o obj-$(CONFIG_RESET_TI_SYSCON) += reset-ti-syscon.o obj-$(CONFIG_RESET_UNIPHIER) += reset-uniphier.o -obj-$(CONFIG_RESET_ZX2967) += reset-zx2967.o obj-$(CONFIG_RESET_ZYNQ) += reset-zynq.o diff --git a/drivers/reset/reset-axs10x.c b/drivers/reset/reset-axs10x.c new file mode 100644 index 0000000..afb298e --- /dev/null +++ b/drivers/reset/reset-axs10x.c @@ -0,0 +1,83 @@ +/* + * Copyright (C) 2017 Synopsys. + * + * Synopsys AXS10x reset driver. + * + * This file is licensed under the terms of the GNU General Public + * License version 2. This program is licensed "as is" without any + * warranty of any kind, whether express or implied. + */ + +#include <linux/io.h> +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/reset-controller.h> + +#define to_axs10x_rst(p) container_of((p), struct axs10x_rst, rcdev) + +#define AXS10X_MAX_RESETS 32 + +struct axs10x_rst { + void __iomem *regs_rst; + spinlock_t lock; + struct reset_controller_dev rcdev; +}; + +static int axs10x_reset_reset(struct reset_controller_dev *rcdev, + unsigned long id) +{ + struct axs10x_rst *rst = to_axs10x_rst(rcdev); + unsigned long flags; + + spin_lock_irqsave(&rst->lock, flags); + writel(BIT(id), rst->regs_rst); + spin_unlock_irqrestore(&rst->lock, flags); + + return 0; +} + +static const struct reset_control_ops axs10x_reset_ops = { + .reset = axs10x_reset_reset, +}; + +static int axs10x_reset_probe(struct platform_device *pdev) +{ + struct axs10x_rst *rst; + struct resource *mem; + + rst = devm_kzalloc(&pdev->dev, sizeof(*rst), GFP_KERNEL); + if (!rst) + return -ENOMEM; + + mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); + rst->regs_rst = devm_ioremap_resource(&pdev->dev, mem); + if (IS_ERR(rst->regs_rst)) + return PTR_ERR(rst->regs_rst); + + spin_lock_init(&rst->lock); + + rst->rcdev.owner = THIS_MODULE; + rst->rcdev.ops = &axs10x_reset_ops; + rst->rcdev.of_node = pdev->dev.of_node; + rst->rcdev.nr_resets = AXS10X_MAX_RESETS; + + return devm_reset_controller_register(&pdev->dev, &rst->rcdev); +} + +static const struct of_device_id axs10x_reset_dt_match[] = { + { .compatible = "snps,axs10x-reset" }, + { }, +}; + +static struct platform_driver axs10x_reset_driver = { + .probe = axs10x_reset_probe, + .driver = { + .name = "axs10x-reset", + .of_match_table = axs10x_reset_dt_match, + }, +}; +builtin_platform_driver(axs10x_reset_driver); + +MODULE_AUTHOR("Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>"); +MODULE_DESCRIPTION("Synopsys AXS10x reset driver"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/reset/reset-meson.c b/drivers/reset/reset-meson.c index a8b915e..c419a37 100644 --- a/drivers/reset/reset-meson.c +++ b/drivers/reset/reset-meson.c @@ -62,13 +62,16 @@ #include <linux/reset-controller.h> #include <linux/slab.h> #include <linux/types.h> +#include <linux/of_device.h> #define REG_COUNT 8 #define BITS_PER_REG 32 +#define LEVEL_OFFSET 0x7c struct meson_reset { void __iomem *reg_base; struct reset_controller_dev rcdev; + spinlock_t lock; }; static int meson_reset_reset(struct reset_controller_dev *rcdev, @@ -80,26 +83,68 @@ static int meson_reset_reset(struct reset_controller_dev *rcdev, unsigned int offset = id % BITS_PER_REG; void __iomem *reg_addr = data->reg_base + (bank << 2); - if (bank >= REG_COUNT) - return -EINVAL; - writel(BIT(offset), reg_addr); return 0; } -static const struct reset_control_ops meson_reset_ops = { +static int meson_reset_level(struct reset_controller_dev *rcdev, + unsigned long id, bool assert) +{ + struct meson_reset *data = + container_of(rcdev, struct meson_reset, rcdev); + unsigned int bank = id / BITS_PER_REG; + unsigned int offset = id % BITS_PER_REG; + void __iomem *reg_addr = data->reg_base + LEVEL_OFFSET + (bank << 2); + unsigned long flags; + u32 reg; + + spin_lock_irqsave(&data->lock, flags); + + reg = readl(reg_addr); + if (assert) + writel(reg & ~BIT(offset), reg_addr); + else + writel(reg | BIT(offset), reg_addr); + + spin_unlock_irqrestore(&data->lock, flags); + + return 0; +} + +static int meson_reset_assert(struct reset_controller_dev *rcdev, + unsigned long id) +{ + return meson_reset_level(rcdev, id, true); +} + +static int meson_reset_deassert(struct reset_controller_dev *rcdev, + unsigned long id) +{ + return meson_reset_level(rcdev, id, false); +} + +static const struct reset_control_ops meson_reset_meson8_ops = { .reset = meson_reset_reset, }; +static const struct reset_control_ops meson_reset_gx_ops = { + .reset = meson_reset_reset, + .assert = meson_reset_assert, + .deassert = meson_reset_deassert, +}; + static const struct of_device_id meson_reset_dt_ids[] = { - { .compatible = "amlogic,meson8b-reset", }, - { .compatible = "amlogic,meson-gxbb-reset", }, + { .compatible = "amlogic,meson8b-reset", + .data = &meson_reset_meson8_ops, }, + { .compatible = "amlogic,meson-gxbb-reset", + .data = &meson_reset_gx_ops, }, { /* sentinel */ }, }; static int meson_reset_probe(struct platform_device *pdev) { + const struct reset_control_ops *ops; struct meson_reset *data; struct resource *res; @@ -107,6 +152,10 @@ static int meson_reset_probe(struct platform_device *pdev) if (!data) return -ENOMEM; + ops = of_device_get_match_data(&pdev->dev); + if (!ops) + return -EINVAL; + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); data->reg_base = devm_ioremap_resource(&pdev->dev, res); if (IS_ERR(data->reg_base)) @@ -114,9 +163,11 @@ static int meson_reset_probe(struct platform_device *pdev) platform_set_drvdata(pdev, data); + spin_lock_init(&data->lock); + data->rcdev.owner = THIS_MODULE; data->rcdev.nr_resets = REG_COUNT * BITS_PER_REG; - data->rcdev.ops = &meson_reset_ops; + data->rcdev.ops = ops; data->rcdev.of_node = pdev->dev.of_node; return devm_reset_controller_register(&pdev->dev, &data->rcdev); diff --git a/drivers/reset/reset-simple.c b/drivers/reset/reset-simple.c new file mode 100644 index 0000000..2d4f362 --- /dev/null +++ b/drivers/reset/reset-simple.c @@ -0,0 +1,186 @@ +/* + * Simple Reset Controller Driver + * + * Copyright (C) 2017 Pengutronix, Philipp Zabel <kernel@pengutronix.de> + * + * Based on Allwinner SoCs Reset Controller driver + * + * Copyright 2013 Maxime Ripard + * + * Maxime Ripard <maxime.ripard@free-electrons.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + */ + +#include <linux/device.h> +#include <linux/err.h> +#include <linux/io.h> +#include <linux/of.h> +#include <linux/of_device.h> +#include <linux/platform_device.h> +#include <linux/reset-controller.h> +#include <linux/spinlock.h> + +#include "reset-simple.h" + +static inline struct reset_simple_data * +to_reset_simple_data(struct reset_controller_dev *rcdev) +{ + return container_of(rcdev, struct reset_simple_data, rcdev); +} + +static int reset_simple_update(struct reset_controller_dev *rcdev, + unsigned long id, bool assert) +{ + struct reset_simple_data *data = to_reset_simple_data(rcdev); + int reg_width = sizeof(u32); + int bank = id / (reg_width * BITS_PER_BYTE); + int offset = id % (reg_width * BITS_PER_BYTE); + unsigned long flags; + u32 reg; + + spin_lock_irqsave(&data->lock, flags); + + reg = readl(data->membase + (bank * reg_width)); + if (assert ^ data->active_low) + reg |= BIT(offset); + else + reg &= ~BIT(offset); + writel(reg, data->membase + (bank * reg_width)); + + spin_unlock_irqrestore(&data->lock, flags); + + return 0; +} + +static int reset_simple_assert(struct reset_controller_dev *rcdev, + unsigned long id) +{ + return reset_simple_update(rcdev, id, true); +} + +static int reset_simple_deassert(struct reset_controller_dev *rcdev, + unsigned long id) +{ + return reset_simple_update(rcdev, id, false); +} + +static int reset_simple_status(struct reset_controller_dev *rcdev, + unsigned long id) +{ + struct reset_simple_data *data = to_reset_simple_data(rcdev); + int reg_width = sizeof(u32); + int bank = id / (reg_width * BITS_PER_BYTE); + int offset = id % (reg_width * BITS_PER_BYTE); + u32 reg; + + reg = readl(data->membase + (bank * reg_width)); + + return !(reg & BIT(offset)) ^ !data->status_active_low; +} + +const struct reset_control_ops reset_simple_ops = { + .assert = reset_simple_assert, + .deassert = reset_simple_deassert, + .status = reset_simple_status, +}; + +/** + * struct reset_simple_devdata - simple reset controller properties + * @reg_offset: offset between base address and first reset register. + * @nr_resets: number of resets. If not set, default to resource size in bits. + * @active_low: if true, bits are cleared to assert the reset. Otherwise, bits + * are set to assert the reset. + * @status_active_low: if true, bits read back as cleared while the reset is + * asserted. Otherwise, bits read back as set while the + * reset is asserted. + */ +struct reset_simple_devdata { + u32 reg_offset; + u32 nr_resets; + bool active_low; + bool status_active_low; +}; + +#define SOCFPGA_NR_BANKS 8 + +static const struct reset_simple_devdata reset_simple_socfpga = { + .reg_offset = 0x10, + .nr_resets = SOCFPGA_NR_BANKS * 32, + .status_active_low = true, +}; + +static const struct reset_simple_devdata reset_simple_active_low = { + .active_low = true, + .status_active_low = true, +}; + +static const struct of_device_id reset_simple_dt_ids[] = { + { .compatible = "altr,rst-mgr", .data = &reset_simple_socfpga }, + { .compatible = "st,stm32-rcc", }, + { .compatible = "allwinner,sun6i-a31-clock-reset", + .data = &reset_simple_active_low }, + { .compatible = "zte,zx296718-reset", + .data = &reset_simple_active_low }, + { /* sentinel */ }, +}; + +static int reset_simple_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + const struct reset_simple_devdata *devdata; + struct reset_simple_data *data; + void __iomem *membase; + struct resource *res; + u32 reg_offset = 0; + + devdata = of_device_get_match_data(dev); + + data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL); + if (!data) + return -ENOMEM; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + membase = devm_ioremap_resource(dev, res); + if (IS_ERR(membase)) + return PTR_ERR(membase); + + spin_lock_init(&data->lock); + data->membase = membase; + data->rcdev.owner = THIS_MODULE; + data->rcdev.nr_resets = resource_size(res) * BITS_PER_BYTE; + data->rcdev.ops = &reset_simple_ops; + data->rcdev.of_node = dev->of_node; + + if (devdata) { + reg_offset = devdata->reg_offset; + if (devdata->nr_resets) + data->rcdev.nr_resets = devdata->nr_resets; + data->active_low = devdata->active_low; + data->status_active_low = devdata->status_active_low; + } + + if (of_device_is_compatible(dev->of_node, "altr,rst-mgr") && + of_property_read_u32(dev->of_node, "altr,modrst-offset", + ®_offset)) { + dev_warn(dev, + "missing altr,modrst-offset property, assuming 0x%x!\n", + reg_offset); + } + + data->membase += reg_offset; + + return devm_reset_controller_register(dev, &data->rcdev); +} + +static struct platform_driver reset_simple_driver = { + .probe = reset_simple_probe, + .driver = { + .name = "simple-reset", + .of_match_table = reset_simple_dt_ids, + }, +}; +builtin_platform_driver(reset_simple_driver); diff --git a/drivers/reset/reset-simple.h b/drivers/reset/reset-simple.h new file mode 100644 index 0000000..8a49602 --- /dev/null +++ b/drivers/reset/reset-simple.h @@ -0,0 +1,45 @@ +/* + * Simple Reset Controller ops + * + * Based on Allwinner SoCs Reset Controller driver + * + * Copyright 2013 Maxime Ripard + * + * Maxime Ripard <maxime.ripard@free-electrons.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + */ + +#ifndef __RESET_SIMPLE_H__ +#define __RESET_SIMPLE_H__ + +#include <linux/io.h> +#include <linux/reset-controller.h> +#include <linux/spinlock.h> + +/** + * struct reset_simple_data - driver data for simple reset controllers + * @lock: spinlock to protect registers during read-modify-write cycles + * @membase: memory mapped I/O register range + * @rcdev: reset controller device base structure + * @active_low: if true, bits are cleared to assert the reset. Otherwise, bits + * are set to assert the reset. Note that this says nothing about + * the voltage level of the actual reset line. + * @status_active_low: if true, bits read back as cleared while the reset is + * asserted. Otherwise, bits read back as set while the + * reset is asserted. + */ +struct reset_simple_data { + spinlock_t lock; + void __iomem *membase; + struct reset_controller_dev rcdev; + bool active_low; + bool status_active_low; +}; + +extern const struct reset_control_ops reset_simple_ops; + +#endif /* __RESET_SIMPLE_H__ */ diff --git a/drivers/reset/reset-socfpga.c b/drivers/reset/reset-socfpga.c deleted file mode 100644 index 3907bbc..0000000 --- a/drivers/reset/reset-socfpga.c +++ /dev/null @@ -1,157 +0,0 @@ -/* - * Socfpga Reset Controller Driver - * - * Copyright 2014 Steffen Trumtrar <s.trumtrar@pengutronix.de> - * - * based on - * Allwinner SoCs Reset Controller driver - * - * Copyright 2013 Maxime Ripard - * - * Maxime Ripard <maxime.ripard@free-electrons.com> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - */ - -#include <linux/err.h> -#include <linux/io.h> -#include <linux/init.h> -#include <linux/of.h> -#include <linux/platform_device.h> -#include <linux/reset-controller.h> -#include <linux/spinlock.h> -#include <linux/types.h> - -#define BANK_INCREMENT 4 -#define NR_BANKS 8 - -struct socfpga_reset_data { - spinlock_t lock; - void __iomem *membase; - struct reset_controller_dev rcdev; -}; - -static int socfpga_reset_assert(struct reset_controller_dev *rcdev, - unsigned long id) -{ - struct socfpga_reset_data *data = container_of(rcdev, - struct socfpga_reset_data, - rcdev); - int reg_width = sizeof(u32); - int bank = id / (reg_width * BITS_PER_BYTE); - int offset = id % (reg_width * BITS_PER_BYTE); - unsigned long flags; - u32 reg; - - spin_lock_irqsave(&data->lock, flags); - - reg = readl(data->membase + (bank * BANK_INCREMENT)); - writel(reg | BIT(offset), data->membase + (bank * BANK_INCREMENT)); - spin_unlock_irqrestore(&data->lock, flags); - - return 0; -} - -static int socfpga_reset_deassert(struct reset_controller_dev *rcdev, - unsigned long id) -{ - struct socfpga_reset_data *data = container_of(rcdev, - struct socfpga_reset_data, - rcdev); - - int reg_width = sizeof(u32); - int bank = id / (reg_width * BITS_PER_BYTE); - int offset = id % (reg_width * BITS_PER_BYTE); - unsigned long flags; - u32 reg; - - spin_lock_irqsave(&data->lock, flags); - - reg = readl(data->membase + (bank * BANK_INCREMENT)); - writel(reg & ~BIT(offset), data->membase + (bank * BANK_INCREMENT)); - - spin_unlock_irqrestore(&data->lock, flags); - - return 0; -} - -static int socfpga_reset_status(struct reset_controller_dev *rcdev, - unsigned long id) -{ - struct socfpga_reset_data *data = container_of(rcdev, - struct socfpga_reset_data, rcdev); - int reg_width = sizeof(u32); - int bank = id / (reg_width * BITS_PER_BYTE); - int offset = id % (reg_width * BITS_PER_BYTE); - u32 reg; - - reg = readl(data->membase + (bank * BANK_INCREMENT)); - - return !(reg & BIT(offset)); -} - -static const struct reset_control_ops socfpga_reset_ops = { - .assert = socfpga_reset_assert, - .deassert = socfpga_reset_deassert, - .status = socfpga_reset_status, -}; - -static int socfpga_reset_probe(struct platform_device *pdev) -{ - struct socfpga_reset_data *data; - struct resource *res; - struct device *dev = &pdev->dev; - struct device_node *np = dev->of_node; - u32 modrst_offset; - - /* - * The binding was mainlined without the required property. - * Do not continue, when we encounter an old DT. - */ - if (!of_find_property(pdev->dev.of_node, "#reset-cells", NULL)) { - dev_err(&pdev->dev, "%pOF missing #reset-cells property\n", - pdev->dev.of_node); - return -EINVAL; - } - - data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL); - if (!data) - return -ENOMEM; - - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - data->membase = devm_ioremap_resource(&pdev->dev, res); - if (IS_ERR(data->membase)) - return PTR_ERR(data->membase); - - if (of_property_read_u32(np, "altr,modrst-offset", &modrst_offset)) { - dev_warn(dev, "missing altr,modrst-offset property, assuming 0x10!\n"); - modrst_offset = 0x10; - } - data->membase += modrst_offset; - - spin_lock_init(&data->lock); - - data->rcdev.owner = THIS_MODULE; - data->rcdev.nr_resets = NR_BANKS * (sizeof(u32) * BITS_PER_BYTE); - data->rcdev.ops = &socfpga_reset_ops; - data->rcdev.of_node = pdev->dev.of_node; - - return devm_reset_controller_register(dev, &data->rcdev); -} - -static const struct of_device_id socfpga_reset_dt_ids[] = { - { .compatible = "altr,rst-mgr", }, - { /* sentinel */ }, -}; - -static struct platform_driver socfpga_reset_driver = { - .probe = socfpga_reset_probe, - .driver = { - .name = "socfpga-reset", - .of_match_table = socfpga_reset_dt_ids, - }, -}; -builtin_platform_driver(socfpga_reset_driver); diff --git a/drivers/reset/reset-stm32.c b/drivers/reset/reset-stm32.c deleted file mode 100644 index 3a7c8527..0000000 --- a/drivers/reset/reset-stm32.c +++ /dev/null @@ -1,108 +0,0 @@ -/* - * Copyright (C) Maxime Coquelin 2015 - * Author: Maxime Coquelin <mcoquelin.stm32@gmail.com> - * License terms: GNU General Public License (GPL), version 2 - * - * Heavily based on sunxi driver from Maxime Ripard. - */ - -#include <linux/err.h> -#include <linux/io.h> -#include <linux/of.h> -#include <linux/of_address.h> -#include <linux/platform_device.h> -#include <linux/reset-controller.h> -#include <linux/slab.h> -#include <linux/spinlock.h> -#include <linux/types.h> - -struct stm32_reset_data { - spinlock_t lock; - void __iomem *membase; - struct reset_controller_dev rcdev; -}; - -static int stm32_reset_assert(struct reset_controller_dev *rcdev, - unsigned long id) -{ - struct stm32_reset_data *data = container_of(rcdev, - struct stm32_reset_data, - rcdev); - int bank = id / BITS_PER_LONG; - int offset = id % BITS_PER_LONG; - unsigned long flags; - u32 reg; - - spin_lock_irqsave(&data->lock, flags); - - reg = readl(data->membase + (bank * 4)); - writel(reg | BIT(offset), data->membase + (bank * 4)); - - spin_unlock_irqrestore(&data->lock, flags); - - return 0; -} - -static int stm32_reset_deassert(struct reset_controller_dev *rcdev, - unsigned long id) -{ - struct stm32_reset_data *data = container_of(rcdev, - struct stm32_reset_data, - rcdev); - int bank = id / BITS_PER_LONG; - int offset = id % BITS_PER_LONG; - unsigned long flags; - u32 reg; - - spin_lock_irqsave(&data->lock, flags); - - reg = readl(data->membase + (bank * 4)); - writel(reg & ~BIT(offset), data->membase + (bank * 4)); - - spin_unlock_irqrestore(&data->lock, flags); - - return 0; -} - -static const struct reset_control_ops stm32_reset_ops = { - .assert = stm32_reset_assert, - .deassert = stm32_reset_deassert, -}; - -static const struct of_device_id stm32_reset_dt_ids[] = { - { .compatible = "st,stm32-rcc", }, - { /* sentinel */ }, -}; - -static int stm32_reset_probe(struct platform_device *pdev) -{ - struct stm32_reset_data *data; - struct resource *res; - - data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL); - if (!data) - return -ENOMEM; - - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - data->membase = devm_ioremap_resource(&pdev->dev, res); - if (IS_ERR(data->membase)) - return PTR_ERR(data->membase); - - spin_lock_init(&data->lock); - - data->rcdev.owner = THIS_MODULE; - data->rcdev.nr_resets = resource_size(res) * 8; - data->rcdev.ops = &stm32_reset_ops; - data->rcdev.of_node = pdev->dev.of_node; - - return devm_reset_controller_register(&pdev->dev, &data->rcdev); -} - -static struct platform_driver stm32_reset_driver = { - .probe = stm32_reset_probe, - .driver = { - .name = "stm32-rcc-reset", - .of_match_table = stm32_reset_dt_ids, - }, -}; -builtin_platform_driver(stm32_reset_driver); diff --git a/drivers/reset/reset-sunxi.c b/drivers/reset/reset-sunxi.c index 2c7dd1f..db9a1a7 100644 --- a/drivers/reset/reset-sunxi.c +++ b/drivers/reset/reset-sunxi.c @@ -22,64 +22,11 @@ #include <linux/spinlock.h> #include <linux/types.h> -struct sunxi_reset_data { - spinlock_t lock; - void __iomem *membase; - struct reset_controller_dev rcdev; -}; - -static int sunxi_reset_assert(struct reset_controller_dev *rcdev, - unsigned long id) -{ - struct sunxi_reset_data *data = container_of(rcdev, - struct sunxi_reset_data, - rcdev); - int reg_width = sizeof(u32); - int bank = id / (reg_width * BITS_PER_BYTE); - int offset = id % (reg_width * BITS_PER_BYTE); - unsigned long flags; - u32 reg; - - spin_lock_irqsave(&data->lock, flags); - - reg = readl(data->membase + (bank * reg_width)); - writel(reg & ~BIT(offset), data->membase + (bank * reg_width)); - - spin_unlock_irqrestore(&data->lock, flags); - - return 0; -} - -static int sunxi_reset_deassert(struct reset_controller_dev *rcdev, - unsigned long id) -{ - struct sunxi_reset_data *data = container_of(rcdev, - struct sunxi_reset_data, - rcdev); - int reg_width = sizeof(u32); - int bank = id / (reg_width * BITS_PER_BYTE); - int offset = id % (reg_width * BITS_PER_BYTE); - unsigned long flags; - u32 reg; - - spin_lock_irqsave(&data->lock, flags); - - reg = readl(data->membase + (bank * reg_width)); - writel(reg | BIT(offset), data->membase + (bank * reg_width)); - - spin_unlock_irqrestore(&data->lock, flags); - - return 0; -} - -static const struct reset_control_ops sunxi_reset_ops = { - .assert = sunxi_reset_assert, - .deassert = sunxi_reset_deassert, -}; +#include "reset-simple.h" static int sunxi_reset_init(struct device_node *np) { - struct sunxi_reset_data *data; + struct reset_simple_data *data; struct resource res; resource_size_t size; int ret; @@ -108,8 +55,9 @@ static int sunxi_reset_init(struct device_node *np) data->rcdev.owner = THIS_MODULE; data->rcdev.nr_resets = size * 8; - data->rcdev.ops = &sunxi_reset_ops; + data->rcdev.ops = &reset_simple_ops; data->rcdev.of_node = np; + data->active_low = true; return reset_controller_register(&data->rcdev); @@ -122,6 +70,8 @@ err_alloc: * These are the reset controller we need to initialize early on in * our system, before we can even think of using a regular device * driver for it. + * The controllers that we can register through the regular device + * model are handled by the simple reset driver directly. */ static const struct of_device_id sunxi_early_reset_dt_ids[] __initconst = { { .compatible = "allwinner,sun6i-a31-ahb1-reset", }, @@ -135,45 +85,3 @@ void __init sun6i_reset_init(void) for_each_matching_node(np, sunxi_early_reset_dt_ids) sunxi_reset_init(np); } - -/* - * And these are the controllers we can register through the regular - * device model. - */ -static const struct of_device_id sunxi_reset_dt_ids[] = { - { .compatible = "allwinner,sun6i-a31-clock-reset", }, - { /* sentinel */ }, -}; - -static int sunxi_reset_probe(struct platform_device *pdev) -{ - struct sunxi_reset_data *data; - struct resource *res; - - data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL); - if (!data) - return -ENOMEM; - - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - data->membase = devm_ioremap_resource(&pdev->dev, res); - if (IS_ERR(data->membase)) - return PTR_ERR(data->membase); - - spin_lock_init(&data->lock); - - data->rcdev.owner = THIS_MODULE; - data->rcdev.nr_resets = resource_size(res) * 8; - data->rcdev.ops = &sunxi_reset_ops; - data->rcdev.of_node = pdev->dev.of_node; - - return devm_reset_controller_register(&pdev->dev, &data->rcdev); -} - -static struct platform_driver sunxi_reset_driver = { - .probe = sunxi_reset_probe, - .driver = { - .name = "sunxi-reset", - .of_match_table = sunxi_reset_dt_ids, - }, -}; -builtin_platform_driver(sunxi_reset_driver); diff --git a/drivers/reset/reset-uniphier.c b/drivers/reset/reset-uniphier.c index bda2dd1..e8bb023 100644 --- a/drivers/reset/reset-uniphier.c +++ b/drivers/reset/reset-uniphier.c @@ -58,6 +58,7 @@ static const struct uniphier_reset_data uniphier_ld4_sys_reset_data[] = { static const struct uniphier_reset_data uniphier_pro4_sys_reset_data[] = { UNIPHIER_RESETX(2, 0x2000, 2), /* NAND */ + UNIPHIER_RESETX(6, 0x2000, 12), /* Ether */ UNIPHIER_RESETX(8, 0x2000, 10), /* STDMAC (HSC, MIO, RLE) */ UNIPHIER_RESETX(12, 0x2000, 6), /* GIO (Ether, SATA, USB3) */ UNIPHIER_RESETX(14, 0x2000, 17), /* USB30 */ @@ -76,6 +77,7 @@ static const struct uniphier_reset_data uniphier_pro5_sys_reset_data[] = { static const struct uniphier_reset_data uniphier_pxs2_sys_reset_data[] = { UNIPHIER_RESETX(2, 0x2000, 2), /* NAND */ + UNIPHIER_RESETX(6, 0x2000, 12), /* Ether */ UNIPHIER_RESETX(8, 0x2000, 10), /* STDMAC (HSC, RLE) */ UNIPHIER_RESETX(14, 0x2000, 17), /* USB30 */ UNIPHIER_RESETX(15, 0x2004, 17), /* USB31 */ @@ -92,6 +94,7 @@ static const struct uniphier_reset_data uniphier_pxs2_sys_reset_data[] = { static const struct uniphier_reset_data uniphier_ld11_sys_reset_data[] = { UNIPHIER_RESETX(2, 0x200c, 0), /* NAND */ UNIPHIER_RESETX(4, 0x200c, 2), /* eMMC */ + UNIPHIER_RESETX(6, 0x200c, 6), /* Ether */ UNIPHIER_RESETX(8, 0x200c, 8), /* STDMAC (HSC, MIO) */ UNIPHIER_RESETX(40, 0x2008, 0), /* AIO */ UNIPHIER_RESETX(41, 0x2008, 1), /* EVEA */ @@ -102,6 +105,7 @@ static const struct uniphier_reset_data uniphier_ld11_sys_reset_data[] = { static const struct uniphier_reset_data uniphier_ld20_sys_reset_data[] = { UNIPHIER_RESETX(2, 0x200c, 0), /* NAND */ UNIPHIER_RESETX(4, 0x200c, 2), /* eMMC */ + UNIPHIER_RESETX(6, 0x200c, 6), /* Ether */ UNIPHIER_RESETX(8, 0x200c, 8), /* STDMAC (HSC) */ UNIPHIER_RESETX(12, 0x200c, 5), /* GIO (PCIe, USB3) */ UNIPHIER_RESETX(16, 0x200c, 12), /* USB30-PHY0 */ @@ -114,6 +118,20 @@ static const struct uniphier_reset_data uniphier_ld20_sys_reset_data[] = { UNIPHIER_RESET_END, }; +static const struct uniphier_reset_data uniphier_pxs3_sys_reset_data[] = { + UNIPHIER_RESETX(2, 0x200c, 0), /* NAND */ + UNIPHIER_RESETX(4, 0x200c, 2), /* eMMC */ + UNIPHIER_RESETX(8, 0x200c, 12), /* STDMAC */ + UNIPHIER_RESETX(12, 0x200c, 4), /* USB30 link (GIO0) */ + UNIPHIER_RESETX(13, 0x200c, 5), /* USB31 link (GIO1) */ + UNIPHIER_RESETX(16, 0x200c, 16), /* USB30-PHY0 */ + UNIPHIER_RESETX(17, 0x200c, 18), /* USB30-PHY1 */ + UNIPHIER_RESETX(18, 0x200c, 20), /* USB30-PHY2 */ + UNIPHIER_RESETX(20, 0x200c, 17), /* USB31-PHY0 */ + UNIPHIER_RESETX(21, 0x200c, 19), /* USB31-PHY1 */ + UNIPHIER_RESET_END, +}; + /* Media I/O reset data */ #define UNIPHIER_MIO_RESET_SD(id, ch) \ UNIPHIER_RESETX((id), 0x110 + 0x200 * (ch), 0) @@ -359,6 +377,10 @@ static const struct of_device_id uniphier_reset_match[] = { .compatible = "socionext,uniphier-ld20-reset", .data = uniphier_ld20_sys_reset_data, }, + { + .compatible = "socionext,uniphier-pxs3-reset", + .data = uniphier_pxs3_sys_reset_data, + }, /* Media I/O reset, SD reset */ { .compatible = "socionext,uniphier-ld4-mio-reset", @@ -392,6 +414,10 @@ static const struct of_device_id uniphier_reset_match[] = { .compatible = "socionext,uniphier-ld20-sd-reset", .data = uniphier_pro5_sd_reset_data, }, + { + .compatible = "socionext,uniphier-pxs3-sd-reset", + .data = uniphier_pro5_sd_reset_data, + }, /* Peripheral reset */ { .compatible = "socionext,uniphier-ld4-peri-reset", @@ -421,6 +447,10 @@ static const struct of_device_id uniphier_reset_match[] = { .compatible = "socionext,uniphier-ld20-peri-reset", .data = uniphier_pro4_peri_reset_data, }, + { + .compatible = "socionext,uniphier-pxs3-peri-reset", + .data = uniphier_pro4_peri_reset_data, + }, /* Analog signal amplifiers reset */ { .compatible = "socionext,uniphier-ld11-adamv-reset", diff --git a/drivers/reset/reset-zx2967.c b/drivers/reset/reset-zx2967.c deleted file mode 100644 index 4f319f7..0000000 --- a/drivers/reset/reset-zx2967.c +++ /dev/null @@ -1,99 +0,0 @@ -/* - * ZTE's zx2967 family reset controller driver - * - * Copyright (C) 2017 ZTE Ltd. - * - * Author: Baoyou Xie <baoyou.xie@linaro.org> - * - * License terms: GNU General Public License (GPL) version 2 - */ - -#include <linux/of_address.h> -#include <linux/platform_device.h> -#include <linux/reset-controller.h> - -struct zx2967_reset { - void __iomem *reg_base; - spinlock_t lock; - struct reset_controller_dev rcdev; -}; - -static int zx2967_reset_act(struct reset_controller_dev *rcdev, - unsigned long id, bool assert) -{ - struct zx2967_reset *reset = NULL; - int bank = id / 32; - int offset = id % 32; - u32 reg; - unsigned long flags; - - reset = container_of(rcdev, struct zx2967_reset, rcdev); - - spin_lock_irqsave(&reset->lock, flags); - - reg = readl_relaxed(reset->reg_base + (bank * 4)); - if (assert) - reg &= ~BIT(offset); - else - reg |= BIT(offset); - writel_relaxed(reg, reset->reg_base + (bank * 4)); - - spin_unlock_irqrestore(&reset->lock, flags); - - return 0; -} - -static int zx2967_reset_assert(struct reset_controller_dev *rcdev, - unsigned long id) -{ - return zx2967_reset_act(rcdev, id, true); -} - -static int zx2967_reset_deassert(struct reset_controller_dev *rcdev, - unsigned long id) -{ - return zx2967_reset_act(rcdev, id, false); -} - -static const struct reset_control_ops zx2967_reset_ops = { - .assert = zx2967_reset_assert, - .deassert = zx2967_reset_deassert, -}; - -static int zx2967_reset_probe(struct platform_device *pdev) -{ - struct zx2967_reset *reset; - struct resource *res; - - reset = devm_kzalloc(&pdev->dev, sizeof(*reset), GFP_KERNEL); - if (!reset) - return -ENOMEM; - - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - reset->reg_base = devm_ioremap_resource(&pdev->dev, res); - if (IS_ERR(reset->reg_base)) - return PTR_ERR(reset->reg_base); - - spin_lock_init(&reset->lock); - - reset->rcdev.owner = THIS_MODULE; - reset->rcdev.nr_resets = resource_size(res) * 8; - reset->rcdev.ops = &zx2967_reset_ops; - reset->rcdev.of_node = pdev->dev.of_node; - - return devm_reset_controller_register(&pdev->dev, &reset->rcdev); -} - -static const struct of_device_id zx2967_reset_dt_ids[] = { - { .compatible = "zte,zx296718-reset", }, - {}, -}; - -static struct platform_driver zx2967_reset_driver = { - .probe = zx2967_reset_probe, - .driver = { - .name = "zx2967-reset", - .of_match_table = zx2967_reset_dt_ids, - }, -}; -builtin_platform_driver(zx2967_reset_driver); 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