diff options
Diffstat (limited to 'drivers/power')
| -rw-r--r-- | drivers/power/reset/Kconfig | 6 | ||||
| -rw-r--r-- | drivers/power/reset/Makefile | 1 | ||||
| -rw-r--r-- | drivers/power/reset/hisi-reboot.c | 67 |
3 files changed, 74 insertions, 0 deletions
diff --git a/drivers/power/reset/Kconfig b/drivers/power/reset/Kconfig index f2ac54df496f..ca41523bbebf 100644 --- a/drivers/power/reset/Kconfig +++ b/drivers/power/reset/Kconfig @@ -39,6 +39,12 @@ 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 7379818ca69d..a42e70edd037 100644 --- a/drivers/power/reset/Makefile +++ b/drivers/power/reset/Makefile @@ -2,6 +2,7 @@ obj-$(CONFIG_POWER_RESET_AS3722) += as3722-poweroff.o obj-$(CONFIG_POWER_RESET_AXXIA) += axxia-reset.o obj-$(CONFIG_POWER_RESET_BRCMSTB) += brcmstb-reboot.o obj-$(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 000000000000..0c91d0231d36 --- /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); |