diff mbox

[v5,5/8] power: reset: move hisilicon reboot code

Message ID 1406551883-26154-6-git-send-email-haojian.zhuang@linaro.org
State Accepted
Commit 4a9b37371822c6b47fdd87118e4f91b5ebc70b6f
Headers show

Commit Message

Haojian Zhuang July 28, 2014, 12:51 p.m. UTC
Move reboot code from hisilicon platform driver into reset driver.

Signed-off-by: Haojian Zhuang <haojian.zhuang@linaro.org>
---
 arch/arm/mach-hisi/Kconfig        |  3 ++
 arch/arm/mach-hisi/hisilicon.c    | 33 -------------------
 drivers/power/reset/Kconfig       |  6 ++++
 drivers/power/reset/Makefile      |  1 +
 drivers/power/reset/hisi-reboot.c | 67 +++++++++++++++++++++++++++++++++++++++
 5 files changed, 77 insertions(+), 33 deletions(-)
 create mode 100644 drivers/power/reset/hisi-reboot.c

Comments

Arnd Bergmann July 28, 2014, 1:04 p.m. UTC | #1
On Monday 28 July 2014 20:51:20 Haojian Zhuang wrote:
> +
> +static struct of_device_id hisi_reboot_of_match[] = {
> +       { .compatible = "hisilicon,sysctrl" },
> +       {}
> +};
> +
> +static struct platform_driver hisi_reboot_driver = {
> +       .probe = hisi_reboot_probe,
> +       .driver = {
> +               .name = "hisi-reboot",
> +               .of_match_table = hisi_reboot_of_match,
> +       },
> +};
> +module_platform_driver(hisi_reboot_driver);

I think this will get you into trouble if anything else starts
using the "hisilicon,sysctrl" device node. But as long as nothing
does, this seems fine.

	Arnd
Sebastian Reichel Sept. 6, 2014, 6:39 p.m. UTC | #2
Hi,

On Mon, Jul 28, 2014 at 08:51:20PM +0800, Haojian Zhuang wrote:
> Move reboot code from hisilicon platform driver into reset driver.
> 
> Signed-off-by: Haojian Zhuang <haojian.zhuang@linaro.org>
>
> [...]
> +static struct of_device_id hisi_reboot_of_match[] = {
> +	{ .compatible = "hisilicon,sysctrl" },
> +	{}
> +};
> [...]

The patch looks fine, but it's missing DT Binding
documentation (see Documentation/devicetree/bindings).
Apart from that I suggest to change the compatible value
to something like "hisilicon,reset-sysctrl".

-- Sebastian
diff mbox

Patch

diff --git a/arch/arm/mach-hisi/Kconfig b/arch/arm/mach-hisi/Kconfig
index 90fdbb4..9848829 100644
--- a/arch/arm/mach-hisi/Kconfig
+++ b/arch/arm/mach-hisi/Kconfig
@@ -4,6 +4,9 @@  config ARCH_HISI
 	select ARM_AMBA
 	select ARM_GIC
 	select ARM_TIMER_SP804
+	select POWER_RESET
+	select POWER_RESET_HISI
+	select POWER_SUPPLY
 
 if ARCH_HISI
 
diff --git a/arch/arm/mach-hisi/hisilicon.c b/arch/arm/mach-hisi/hisilicon.c
index 2bfbe3f..7996c6b 100644
--- a/arch/arm/mach-hisi/hisilicon.c
+++ b/arch/arm/mach-hisi/hisilicon.c
@@ -14,10 +14,6 @@ 
 #include <linux/clk-provider.h>
 #include <linux/clocksource.h>
 #include <linux/irqchip.h>
-#include <linux/of_address.h>
-#include <linux/of_platform.h>
-
-#include <asm/proc-fns.h>
 
 #include <asm/mach/arch.h>
 #include <asm/mach/map.h>
@@ -51,32 +47,6 @@  static void __init hi3620_map_io(void)
 	iotable_init(hi3620_io_desc, ARRAY_SIZE(hi3620_io_desc));
 }
 
-static void hi3xxx_restart(enum reboot_mode mode, const char *cmd)
-{
-	struct device_node *np;
-	void __iomem *base;
-	int offset;
-
-	np = of_find_compatible_node(NULL, NULL, "hisilicon,sysctrl");
-	if (!np) {
-		pr_err("failed to find hisilicon,sysctrl node\n");
-		return;
-	}
-	base = of_iomap(np, 0);
-	if (!base) {
-		pr_err("failed to map address in hisilicon,sysctrl node\n");
-		return;
-	}
-	if (of_property_read_u32(np, "reboot-offset", &offset) < 0) {
-		pr_err("failed to find reboot-offset property\n");
-		return;
-	}
-	writel_relaxed(0xdeadbeef, base + offset);
-
-	while (1)
-		cpu_do_idle();
-}
-
 static const char *hi3xxx_compat[] __initconst = {
 	"hisilicon,hi3620-hi4511",
 	NULL,
@@ -86,7 +56,6 @@  DT_MACHINE_START(HI3620, "Hisilicon Hi3620 (Flattened Device Tree)")
 	.map_io		= hi3620_map_io,
 	.dt_compat	= hi3xxx_compat,
 	.smp		= smp_ops(hi3xxx_smp_ops),
-	.restart	= hi3xxx_restart,
 MACHINE_END
 
 static const char *hix5hd2_compat[] __initconst = {
@@ -96,7 +65,5 @@  static const char *hix5hd2_compat[] __initconst = {
 
 DT_MACHINE_START(HIX5HD2_DT, "Hisilicon HIX5HD2 (Flattened Device Tree)")
 	.dt_compat	= hix5hd2_compat,
-	.init_late	= hi3xxx_init_late,
 	.smp		= smp_ops(hix5hd2_smp_ops),
-	.restart	= hi3xxx_restart,
 MACHINE_END
diff --git a/drivers/power/reset/Kconfig b/drivers/power/reset/Kconfig
index bdcf517..4127f49 100644
--- a/drivers/power/reset/Kconfig
+++ b/drivers/power/reset/Kconfig
@@ -28,6 +28,12 @@  config POWER_RESET_GPIO
 	  If your board needs a GPIO high/low to power down, say Y and
 	  create a binding in your devicetree.
 
+config POWER_RESET_HISI
+	bool "Hisilicon power-off driver"
+	depends on POWER_RESET && ARCH_HISI
+	help
+	  Reboot support for Hisilicon boards.
+
 config POWER_RESET_MSM
 	bool "Qualcomm MSM power-off driver"
 	depends on POWER_RESET && ARCH_QCOM
diff --git a/drivers/power/reset/Makefile b/drivers/power/reset/Makefile
index dde2e8b..fe0f228 100644
--- a/drivers/power/reset/Makefile
+++ b/drivers/power/reset/Makefile
@@ -1,6 +1,7 @@ 
 obj-$(CONFIG_POWER_RESET_AS3722) += as3722-poweroff.o
 obj-$(CONFIG_POWER_RESET_AXXIA) += axxia-reset.o
 obj-$(CONFIG_POWER_RESET_GPIO) += gpio-poweroff.o
+obj-$(CONFIG_POWER_RESET_HISI) += hisi-reboot.o
 obj-$(CONFIG_POWER_RESET_MSM) += msm-poweroff.o
 obj-$(CONFIG_POWER_RESET_QNAP) += qnap-poweroff.o
 obj-$(CONFIG_POWER_RESET_RESTART) += restart-poweroff.o
diff --git a/drivers/power/reset/hisi-reboot.c b/drivers/power/reset/hisi-reboot.c
new file mode 100644
index 0000000..0c91d02
--- /dev/null
+++ b/drivers/power/reset/hisi-reboot.c
@@ -0,0 +1,67 @@ 
+/*
+ * Hisilicon SoC reset code
+ *
+ * Copyright (c) 2014 Hisilicon Ltd.
+ * Copyright (c) 2014 Linaro Ltd.
+ *
+ * Author: Haojian Zhuang <haojian.zhuang@linaro.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/delay.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/of_address.h>
+#include <linux/platform_device.h>
+#include <linux/reboot.h>
+
+#include <asm/proc-fns.h>
+#include <asm/system_misc.h>
+
+static void __iomem *base;
+static u32 reboot_offset;
+
+static void hisi_restart(enum reboot_mode mode, const char *cmd)
+{
+	writel_relaxed(0xdeadbeef, base + reboot_offset);
+
+	while (1)
+		cpu_do_idle();
+}
+
+static int hisi_reboot_probe(struct platform_device *pdev)
+{
+	struct device_node *np = pdev->dev.of_node;
+
+	base = of_iomap(np, 0);
+	if (!base) {
+		WARN(1, "failed to map base address");
+		return -ENODEV;
+	}
+
+	if (of_property_read_u32(np, "reboot-offset", &reboot_offset) < 0) {
+		pr_err("failed to find reboot-offset property\n");
+		return -EINVAL;
+	}
+
+	arm_pm_restart = hisi_restart;
+
+	return 0;
+}
+
+static struct of_device_id hisi_reboot_of_match[] = {
+	{ .compatible = "hisilicon,sysctrl" },
+	{}
+};
+
+static struct platform_driver hisi_reboot_driver = {
+	.probe = hisi_reboot_probe,
+	.driver = {
+		.name = "hisi-reboot",
+		.of_match_table = hisi_reboot_of_match,
+	},
+};
+module_platform_driver(hisi_reboot_driver);