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Subject[PATCH v2 2/4] firmware: xilinx: Add system shutdown API interface
Date
From: Rajan Vaja <rajan.vaja@xilinx.com>

Add system shutdown API interface which asks firmware to
perform system shutdown/restart.

Signed-off-by: Rajan Vaja <rajan.vaja@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: Jolly Shah <jollys@xilinx.com>
---
Changes in v2:
- Updated Signed-off-by sequence.
---
drivers/firmware/xilinx/zynqmp.c | 14 ++++++++++++++
include/linux/firmware/xlnx-zynqmp.h | 4 +++-
2 files changed, 17 insertions(+), 1 deletion(-)

diff --git a/drivers/firmware/xilinx/zynqmp.c b/drivers/firmware/xilinx/zynqmp.c
index 4c1117d..0f90793 100644
--- a/drivers/firmware/xilinx/zynqmp.c
+++ b/drivers/firmware/xilinx/zynqmp.c
@@ -668,6 +668,19 @@ static int zynqmp_pm_set_requirement(const u32 node, const u32 capabilities,
qos, ack, NULL);
}

+/**
+ * zynqmp_pm_system_shutdown - PM call to request a system shutdown or restart
+ * @type: Shutdown or restart? 0 for shutdown, 1 for restart
+ * @subtype: Specifies which system should be restarted or shut down
+ *
+ * Return: Returns status, either success or error+reason
+ */
+static int zynqmp_pm_system_shutdown(const u32 type, const u32 subtype)
+{
+ return zynqmp_pm_invoke_fn(PM_SYSTEM_SHUTDOWN, type, subtype,
+ 0, 0, NULL);
+}
+
static const struct zynqmp_eemi_ops eemi_ops = {
.get_api_version = zynqmp_pm_get_api_version,
.get_chipid = zynqmp_pm_get_chipid,
@@ -691,6 +704,7 @@ static const struct zynqmp_eemi_ops eemi_ops = {
.set_requirement = zynqmp_pm_set_requirement,
.fpga_load = zynqmp_pm_fpga_load,
.fpga_get_status = zynqmp_pm_fpga_get_status,
+ .system_shutdown = zynqmp_pm_system_shutdown,
};

/**
diff --git a/include/linux/firmware/xlnx-zynqmp.h b/include/linux/firmware/xlnx-zynqmp.h
index 534814e..1fd246c 100644
--- a/include/linux/firmware/xlnx-zynqmp.h
+++ b/include/linux/firmware/xlnx-zynqmp.h
@@ -62,7 +62,8 @@

enum pm_api_id {
PM_GET_API_VERSION = 1,
- PM_REQUEST_NODE = 13,
+ PM_SYSTEM_SHUTDOWN = 12,
+ PM_REQUEST_NODE,
PM_RELEASE_NODE,
PM_SET_REQUIREMENT,
PM_RESET_ASSERT = 17,
@@ -314,6 +315,7 @@ struct zynqmp_eemi_ops {
const u32 capabilities,
const u32 qos,
const enum zynqmp_pm_request_ack ack);
+ int (*system_shutdown)(const u32 type, const u32 subtype);
};

int zynqmp_pm_invoke_fn(u32 pm_api_id, u32 arg0, u32 arg1,
--
2.7.4
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