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From: Jolly Shah <jolly.shah@xilinx.com>
To: ard.biesheuvel@linaro.org, mingo@kernel.org,
	gregkh@linuxfoundation.org, matt@codeblueprint.co.uk,
	sudeep.holla@arm.com, hkallweit1@gmail.com,
	keescook@chromium.org, dmitry.torokhov@gmail.com,
	michal.simek@xilinx.com
Cc: Jolly Shah <jolly.shah@xilinx.com>,
	Rajan Vaja <rajan.vaja@xilinx.com>,
	rajanv@xilinx.com, linux-kernel@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org
Subject: [PATCH 3/5] firmware: xilinx: Add system shutdown API interface
Date: Wed,  4 Dec 2019 15:29:17 -0800
Message-ID: <1575502159-11327-4-git-send-email-jolly.shah@xilinx.com> (raw)
In-Reply-To: <1575502159-11327-1-git-send-email-jolly.shah@xilinx.com>

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


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  parent reply index

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-12-04 23:29 [PATCH 0/5] firmware: xilinx: Add xilinx specific sysfs interface Jolly Shah
2019-12-04 23:29 ` [PATCH 1/5] firmware: xilinx: Adds new eemi call for reg access Jolly Shah
2019-12-04 23:29 ` [PATCH 2/5] firmware: xilinx: Add sysfs interface Jolly Shah
2019-12-04 23:29 ` Jolly Shah [this message]
2019-12-04 23:29 ` [PATCH 4/5] firmware: xilinx: Add sysfs to set shutdown scope Jolly Shah
2019-12-04 23:29 ` [PATCH 5/5] firmware: xilinx: Add sysfs and IOCTL to set boot health status Jolly Shah

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