[PATCH 3/5] firmware: xilinx: Add system shutdown API interface

Jolly Shah
2019-12-04T23:29:48Z

From: Rajan Vaja <rajan.vaja@xilinx.com>

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

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: Rajan Vaja <rajan.vaja@xilinx.com>
Signed-off-by: Jolly Shah <jolly.shah@xilinx.com>
---
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 9836174..8dcf5a4 100644
--- a/drivers/firmware/xilinx/zynqmp.c
+++ b/drivers/firmware/xilinx/zynqmp.c
@@ -690,6 +690,19 @@ static int zynqmp_pm_config_reg_access(u32 register_access_id, u32 address,
address, mask, value, out);
}

+/**
+ * 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,
@@ -714,6 +727,7 @@ static const struct zynqmp_eemi_ops eemi_ops = {
.fpga_load = zynqmp_pm_fpga_load,
.fpga_get_status = zynqmp_pm_fpga_get_status,
.register_access = zynqmp_pm_config_reg_access,
+ .system_shutdown = zynqmp_pm_system_shutdown,
};

/**
diff --git a/include/linux/firmware/xlnx-zynqmp.h b/include/linux/firmware/xlnx-zynqmp.h
index bf6e9db..b96ea5d 100644
--- a/include/linux/firmware/xlnx-zynqmp.h
+++ b/include/linux/firmware/xlnx-zynqmp.h
@@ -61,7 +61,8 @@

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,
@@ -322,6 +323,7 @@ struct zynqmp_eemi_ops {
const enum zynqmp_pm_request_ack ack);
int (*register_access)(u32 register_access_id, u32 address,
u32 mask, u32 value, u32 *out);
+ 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