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authorHaojian Zhuang <haojian.zhuang@linaro.org>2014-05-13 17:11:28 +0800
committerOlof Johansson <olof@lixom.net>2014-07-30 22:32:21 -0700
commit4a9b37371822c6b47fdd87118e4f91b5ebc70b6f (patch)
treed8f574cf2bbf95cb24cd483c08a87917c460cfba /drivers/power
parent75a4795a1d1bccb2e7c7def1be50b32cd1389b6e (diff)
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>
Diffstat (limited to 'drivers/power')
-rw-r--r--drivers/power/reset/Kconfig6
-rw-r--r--drivers/power/reset/Makefile1
-rw-r--r--drivers/power/reset/hisi-reboot.c67
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);