power: reset: move hisilicon reboot code

Move reboot code from hisilicon platform driver into reset driver.

Signed-off-by: Haojian Zhuang <haojian.zhuang@linaro.org>
Acked-by: Wei Xu <xuwei5@hisilicon.com>
Signed-off-by: Olof Johansson <olof@lixom.net>

3 files changed, 74 insertions, 0 deletions

diff --git a/drivers/power/reset/Kconfig b/drivers/power/reset/Kconfig
index bdcf5173e377..4127f494b651 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 dde2e8bbac53..fe0f22877e58 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 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);