sandbox: poweroff: migrate to driver probed from device tree

Follow-up will extend the poweroff driver to support system reset source.
Set the stage by renaming the driver to power (as it does reset as well)
and make it probe from device tree, so it can point at the system reset
source syscon via phandle.

Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

4 files changed, 66 insertions, 43 deletions

diff --git a/arch/sandbox/board/Makefile b/arch/sandbox/board/Makefile
index 26f6cb1922..e50d2ca0f1 100644
--- a/arch/sandbox/board/Makefile
+++ b/arch/sandbox/board/Makefile
@@ -4,7 +4,7 @@ obj-y += hostfile.o
 obj-y += console.o
 obj-y += devices.o
 obj-y += dtb.o
-obj-y += poweroff.o
+obj-y += power.o
 obj-y += dev-random.o
 
 extra-y += barebox.lds
diff --git a/arch/sandbox/board/power.c b/arch/sandbox/board/power.c
new file mode 100644
index 0000000000..ffd8692845
--- /dev/null
+++ b/arch/sandbox/board/power.c
@@ -0,0 +1,61 @@
+#include <common.h>
+#include <driver.h>
+#include <poweroff.h>
+#include <restart.h>
+#include <mach/linux.h>
+#include <reset_source.h>
+
+struct sandbox_power {
+	struct restart_handler rst_hang, rst_reexec;
+};
+
+static void sandbox_poweroff(struct poweroff_handler *poweroff)
+{
+	linux_exit();
+}
+
+static void sandbox_rst_hang(struct restart_handler *rst)
+{
+	linux_hang();
+}
+
+static void sandbox_rst_reexec(struct restart_handler *rst)
+{
+	linux_reexec();
+}
+
+static int sandbox_power_probe(struct device_d *dev)
+{
+	struct sandbox_power *power = xzalloc(sizeof(*power));
+
+	poweroff_handler_register_fn(sandbox_poweroff);
+
+	power->rst_hang = (struct restart_handler) {
+		.name = "hang",
+		.restart = sandbox_rst_hang
+	};
+
+	power->rst_reexec = (struct restart_handler) {
+		.name = "reexec", .priority = 200,
+		.restart = sandbox_rst_reexec,
+	};
+
+	restart_handler_register(&power->rst_hang);
+
+	if (IS_ENABLED(CONFIG_SANDBOX_REEXEC))
+		restart_handler_register(&power->rst_reexec);
+
+	return 0;
+}
+
+static __maybe_unused struct of_device_id sandbox_power_dt_ids[] = {
+	{ .compatible = "barebox,sandbox-power" },
+	{ /* sentinel */ }
+};
+
+static struct driver_d sandbox_power_drv = {
+	.name  = "sandbox-power",
+	.of_compatible = sandbox_power_dt_ids,
+	.probe = sandbox_power_probe,
+};
+coredevice_platform_driver(sandbox_power_drv);
diff --git a/arch/sandbox/board/poweroff.c b/arch/sandbox/board/poweroff.c
deleted file mode 100644
index 8ce739af72..0000000000
--- a/arch/sandbox/board/poweroff.c
+++ /dev/null
@@ -1,42 +0,0 @@
-#include <common.h>
-#include <init.h>
-#include <poweroff.h>
-#include <restart.h>
-#include <mach/linux.h>
-
-static void sandbox_poweroff(struct poweroff_handler *poweroff)
-{
-	linux_exit();
-}
-
-static void sandbox_rst_hang(struct restart_handler *rst)
-{
-	linux_hang();
-}
-
-static struct restart_handler rst_hang = {
-	.name = "hang",
-	.restart = sandbox_rst_hang
-};
-
-static void sandbox_rst_reexec(struct restart_handler *rst)
-{
-	linux_reexec();
-}
-
-static struct restart_handler rst_reexec = {
-	.name = "reexec", .priority = 200,
-	.restart = sandbox_rst_reexec,
-};
-
-static int poweroff_register_feature(void)
-{
-	poweroff_handler_register_fn(sandbox_poweroff);
-	restart_handler_register(&rst_hang);
-
-	if (IS_ENABLED(CONFIG_SANDBOX_REEXEC))
-		restart_handler_register(&rst_reexec);
-
-	return 0;
-}
-coredevice_initcall(poweroff_register_feature);
diff --git a/arch/sandbox/dts/sandbox.dts b/arch/sandbox/dts/sandbox.dts
index afca02d410..d32999292e 100644
--- a/arch/sandbox/dts/sandbox.dts
+++ b/arch/sandbox/dts/sandbox.dts
@@ -37,4 +37,8 @@
 			};
 		};
 	};
+
+	power {
+		compatible = "barebox,sandbox-power";
+	};
 };