[PATCH v3 4/5] reset: zx2967: use the reset-simple driver
Philipp Zabel
p.zabel at pengutronix.de
Wed Aug 16 02:47:00 PDT 2017
The reset-simple driver can be used without changes.
Signed-off-by: Philipp Zabel <p.zabel at pengutronix.de>
---
MAINTAINERS | 1 -
drivers/reset/Kconfig | 10 +----
drivers/reset/Makefile | 1 -
drivers/reset/reset-simple.c | 2 +
drivers/reset/reset-zx2967.c | 99 --------------------------------------------
5 files changed, 4 insertions(+), 109 deletions(-)
delete mode 100644 drivers/reset/reset-zx2967.c
diff --git a/MAINTAINERS b/MAINTAINERS
index 57853844969bf..30af04516d8a0 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -2061,7 +2061,6 @@ L: linux-arm-kernel at lists.infradead.org (moderated for non-subscribers)
S: Maintained
F: arch/arm/mach-zx/
F: drivers/clk/zte/
-F: drivers/reset/reset-zx2967.c
F: drivers/soc/zte/
F: Documentation/devicetree/bindings/arm/zte.txt
F: Documentation/devicetree/bindings/clock/zx296702-clk.txt
diff --git a/drivers/reset/Kconfig b/drivers/reset/Kconfig
index 29f4487c290fc..6dfea01023618 100644
--- a/drivers/reset/Kconfig
+++ b/drivers/reset/Kconfig
@@ -70,14 +70,14 @@ config RESET_PISTACHIO
config RESET_SIMPLE
bool "Simple Reset Controller Driver" if COMPILE_TEST
- default ARCH_SOCFPGA || ARCH_STM32 || ARCH_SUNXI
+ default ARCH_SOCFPGA || ARCH_STM32 || 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
@@ -114,12 +114,6 @@ 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 e8c3a032f4780..3a70c254b5ea5 100644
--- a/drivers/reset/Makefile
+++ b/drivers/reset/Makefile
@@ -16,6 +16,5 @@ 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
diff --git a/drivers/reset/reset-simple.c b/drivers/reset/reset-simple.c
index e54a29b8b532d..13e7d5559acc9 100644
--- a/drivers/reset/reset-simple.c
+++ b/drivers/reset/reset-simple.c
@@ -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 */ },
};
diff --git a/drivers/reset/reset-zx2967.c b/drivers/reset/reset-zx2967.c
deleted file mode 100644
index 4f319f7753d4d..0000000000000
--- 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 at 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);
--
2.11.0
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