| Message ID | 1435547191-18405-1-git-send-email-jun.nie@linaro.org |
|---|---|
| State | New |
| Headers | show |
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. -- To unsubscribe from this list: send the line "unsubscribe linux-gpio" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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);
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