* [PATCH] power/reset: zx: Register restart handler
@ 2015-06-29 3:06 Jun Nie
2015-06-29 6:32 ` Haojian Zhuang
0 siblings, 1 reply; 2+ messages in thread
From: Jun Nie @ 2015-06-29 3:06 UTC (permalink / raw)
To: haojian.zhuang, linus.walleij, linux-gpio
Cc: tony, shawn.guo, wan.zhijun, jason.liu, Jun Nie
Register with kernel restart handler instead of setting arm_pm_restart
directly.
Signed-off-by: Jun Nie <jun.nie@linaro.org>
---
drivers/power/reset/Kconfig | 7 ++++
drivers/power/reset/Makefile | 1 +
drivers/power/reset/zx-reboot.c | 79 +++++++++++++++++++++++++++++++++++++++++
3 files changed, 87 insertions(+)
create mode 100644 drivers/power/reset/zx-reboot.c
diff --git a/drivers/power/reset/Kconfig b/drivers/power/reset/Kconfig
index aad9c33..4ed90f3 100644
--- a/drivers/power/reset/Kconfig
+++ b/drivers/power/reset/Kconfig
@@ -165,5 +165,12 @@ config POWER_RESET_RMOBILE
help
Reboot support for Renesas R-Mobile and SH-Mobile SoCs.
+config POWER_RESET_ZX
+ tristate "ZTE SoCs reset driver"
+ depends on ARCH_ZX || COMPILE_TEST
+ depends on HAS_IOMEM
+ help
+ Reboot support for ZTE SoCs.
+
endif
diff --git a/drivers/power/reset/Makefile b/drivers/power/reset/Makefile
index dbe06c3..096fa67 100644
--- a/drivers/power/reset/Makefile
+++ b/drivers/power/reset/Makefile
@@ -19,3 +19,4 @@ obj-$(CONFIG_POWER_RESET_KEYSTONE) += keystone-reset.o
obj-$(CONFIG_POWER_RESET_SYSCON) += syscon-reboot.o
obj-$(CONFIG_POWER_RESET_SYSCON_POWEROFF) += syscon-poweroff.o
obj-$(CONFIG_POWER_RESET_RMOBILE) += rmobile-reset.o
+obj-$(CONFIG_POWER_RESET_ZX) += zx-reboot.o
diff --git a/drivers/power/reset/zx-reboot.c b/drivers/power/reset/zx-reboot.c
new file mode 100644
index 0000000..fbfee0b
--- /dev/null
+++ b/drivers/power/reset/zx-reboot.c
@@ -0,0 +1,79 @@
+/*
+ * ZTE zx296702 SoC reset code
+ *
+ * Copyright (c) 2015 Linaro Ltd.
+ *
+ * Author: Jun Nie <jun.nie@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/notifier.h>
+#include <linux/of_address.h>
+#include <linux/platform_device.h>
+#include <linux/reboot.h>
+
+#include <asm/proc-fns.h>
+
+static void __iomem *base;
+
+static int zx_restart_handler(struct notifier_block *this,
+ unsigned long mode, void *cmd)
+{
+ struct device_node *np;
+ void __iomem *pcu_base;
+
+ np = of_find_compatible_node(NULL, NULL, "zte,zx296702-pcu");
+ pcu_base = of_iomap(np, 0);
+
+ writel_relaxed(1, base + 0xb0);
+ writel_relaxed(1, pcu_base + 0x34);
+
+ while (1)
+ cpu_do_idle();
+
+ return NOTIFY_DONE;
+}
+
+static struct notifier_block zx_restart_nb = {
+ .notifier_call = zx_restart_handler,
+ .priority = 128,
+};
+
+static int zx_reboot_probe(struct platform_device *pdev)
+{
+ struct device_node *np = pdev->dev.of_node;
+ int err;
+
+ base = of_iomap(np, 0);
+ if (!base) {
+ WARN(1, "failed to map base address");
+ return -ENODEV;
+ }
+
+ err = register_restart_handler(&zx_restart_nb);
+ if (err)
+ dev_err(&pdev->dev, "Register restart handler failed(err=%d)\n",
+ err);
+
+ return err;
+}
+
+static const struct of_device_id zx_reboot_of_match[] = {
+ { .compatible = "zte,sysctrl" },
+ {}
+};
+
+static struct platform_driver zx_reboot_driver = {
+ .probe = zx_reboot_probe,
+ .driver = {
+ .name = "zx-reboot",
+ .of_match_table = zx_reboot_of_match,
+ },
+};
+module_platform_driver(zx_reboot_driver);
--
1.9.1
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH] power/reset: zx: Register restart handler
2015-06-29 3:06 [PATCH] power/reset: zx: Register restart handler Jun Nie
@ 2015-06-29 6:32 ` Haojian Zhuang
0 siblings, 0 replies; 2+ messages in thread
From: Haojian Zhuang @ 2015-06-29 6:32 UTC (permalink / raw)
To: Jun Nie; +Cc: linus.walleij, linux-gpio, tony, shawn.guo, wan.zhijun, jason.liu
On Mon, 2015-06-29 at 11:06 +0800, Jun Nie wrote:
> Register with kernel restart handler instead of setting arm_pm_restart
> directly.
>
> Signed-off-by: Jun Nie <jun.nie@linaro.org>
> ---
> drivers/power/reset/Kconfig | 7 ++++
> drivers/power/reset/Makefile | 1 +
> drivers/power/reset/zx-reboot.c | 79 +++++++++++++++++++++++++++++++++++++++++
> 3 files changed, 87 insertions(+)
> create mode 100644 drivers/power/reset/zx-reboot.c
>
> diff --git a/drivers/power/reset/zx-reboot.c b/drivers/power/reset/zx-reboot.c
> new file mode 100644
> index 0000000..fbfee0b
> --- /dev/null
> +++ b/drivers/power/reset/zx-reboot.c
> @@ -0,0 +1,79 @@
> +/*
> + * ZTE zx296702 SoC reset code
> + *
> + * Copyright (c) 2015 Linaro Ltd.
> + *
> + * Author: Jun Nie <jun.nie@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/notifier.h>
> +#include <linux/of_address.h>
> +#include <linux/platform_device.h>
> +#include <linux/reboot.h>
> +
> +#include <asm/proc-fns.h>
> +
> +static void __iomem *base;
> +
> +static int zx_restart_handler(struct notifier_block *this,
> + unsigned long mode, void *cmd)
> +{
> + struct device_node *np;
> + void __iomem *pcu_base;
> +
> + np = of_find_compatible_node(NULL, NULL, "zte,zx296702-pcu");
> + pcu_base = of_iomap(np, 0);
Why not move these above code into zx_reboot_probe()? And you can check
the value of pcu_base at there.
^ permalink raw reply [flat|nested] 2+ messages in thread
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2015-06-29 6:32 ` Haojian Zhuang
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