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reset: zx2967: use the reset-simple driver

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The reset-simple driver can be used without changes.

Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Reviewed-by: Alexandru Gagniuc <alex.g@adaptrum.com>
This commit is contained in:
Philipp Zabel 2017-08-11 13:03:05 +02:00
parent 0af8a13736
commit f0e0ada67d
5 changed files with 4 additions and 109 deletions
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1
MAINTAINERS
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@ -2124,7 +2124,6 @@ F: drivers/gpio/gpio-zx.c
F: drivers/i2c/busses/i2c-zx2967.c
F: drivers/mmc/host/dw_mmc-zx.*
F: drivers/pinctrl/zte/
F: drivers/reset/reset-zx2967.c
F: drivers/soc/zte/
F: drivers/thermal/zx2967_thermal.c
F: drivers/watchdog/zx2967_wdt.c

10
drivers/reset/Kconfig
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@ -77,14 +77,14 @@ config RESET_PISTACHIO
config RESET_SIMPLE
bool "Simple Reset Controller Driver" if COMPILE_TEST
default ARCH_SOCFPGA || ARCH_STM32 || ARCH_STRATIX10 || ARCH_SUNXI
default ARCH_SOCFPGA || ARCH_STM32 || ARCH_STRATIX10 || ARCH_SUNXI || ARCH_ZX
help
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.
Currently this driver supports Altera SoCFPGAs, the RCC reset
controller in STM32 MCUs, and Allwinner SoCs.
controller in STM32 MCUs, Allwinner SoCs, and ZTE's zx2967 family.
config RESET_SUNXI
bool "Allwinner SoCs Reset Driver" if COMPILE_TEST && !ARCH_SUNXI
@ -121,12 +121,6 @@ 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

1
drivers/reset/Makefile
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@ -17,6 +17,5 @@ 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

2
drivers/reset/reset-simple.c
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@ -123,6 +123,8 @@ static const struct of_device_id reset_simple_dt_ids[] = {
{ .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 */ },
};

99
drivers/reset/reset-zx2967.c
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@ -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);