linux-kernel - [PATCH v6 3/6] firmware: xilinx: export the feature check of zynqmp firmware

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Message-ID: <20211025082350.10881-4-abhyuday.godhasara@xilinx.com>
Date:   Mon, 25 Oct 2021 01:23:47 -0700
From:   Abhyuday Godhasara <abhyuday.godhasara@...inx.com>
To:     <gregkh@...uxfoundation.org>
CC:     <michal.simek@...inx.com>, <abhyuday.godhasara@...inx.com>,
        <rajan.vaja@...inx.com>, <manish.narani@...inx.com>,
        <zou_wei@...wei.com>, <lakshmi.sai.krishna.potthuri@...inx.com>,
        <wendy.liang@...inx.com>, <jliang@...inx.com>,
        <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>
Subject: [PATCH v6 3/6] firmware: xilinx: export the feature check of zynqmp firmware

Export the zynqmp_pm_feature(), so it can be use by other as to get API
version available in firmware.

Signed-off-by: Rajan Vaja <rajan.vaja@...inx.com>
Signed-off-by: Abhyuday Godhasara <abhyuday.godhasara@...inx.com>
Acked-by: Michal Simek <michal.simek@...inx.com>
---
Changes in v6:
- None

Changes in v5:
- None

Changes in v4:
- None

Changes in v3:
- None

Changes in v2:
- None
---
 drivers/firmware/xilinx/zynqmp.c     | 3 ++-
 include/linux/firmware/xlnx-zynqmp.h | 6 ++++++
 2 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/drivers/firmware/xilinx/zynqmp.c b/drivers/firmware/xilinx/zynqmp.c
index 6e653e9cea2d..e2c55f48b93d 100644
--- a/drivers/firmware/xilinx/zynqmp.c
+++ b/drivers/firmware/xilinx/zynqmp.c
@@ -153,7 +153,7 @@ static noinline int do_fw_call_hvc(u64 arg0, u64 arg1, u64 arg2,
  *
  * Return: Returns status, either success or error+reason
  */
-static int zynqmp_pm_feature(u32 api_id)
+int zynqmp_pm_feature(const u32 api_id)
 {
 	int ret;
 	u32 ret_payload[PAYLOAD_ARG_CNT];
@@ -190,6 +190,7 @@ static int zynqmp_pm_feature(u32 api_id)
 
 	return ret;
 }
+EXPORT_SYMBOL_GPL(zynqmp_pm_feature);
 
 /**
  * zynqmp_pm_invoke_fn() - Invoke the system-level platform management layer
diff --git a/include/linux/firmware/xlnx-zynqmp.h b/include/linux/firmware/xlnx-zynqmp.h
index bfd87ae35b2c..591bdbb4290e 100644
--- a/include/linux/firmware/xlnx-zynqmp.h
+++ b/include/linux/firmware/xlnx-zynqmp.h
@@ -433,6 +433,7 @@ int zynqmp_pm_pinctrl_set_config(const u32 pin, const u32 param,
 int zynqmp_pm_load_pdi(const u32 src, const u64 address);
 int zynqmp_pm_register_notifier(const u32 node, const u32 event,
 				const u32 wake, const u32 enable);
+int zynqmp_pm_feature(const u32 api_id);
 #else
 static inline int zynqmp_pm_get_api_version(u32 *version)
 {
@@ -655,6 +656,11 @@ static inline int zynqmp_pm_register_notifier(const u32 node, const u32 event,
 {
 	return -ENODEV;
 }
+
+static inline int zynqmp_pm_feature(const u32 api_id)
+{
+	return -ENODEV;
+}
 #endif
 
 #endif /* __FIRMWARE_ZYNQMP_H__ */
-- 
2.32.0.93.g670b81a