[PATCH v2 07/11] fpga: dfl: afu: export __port_enable/disable function.

[Wu Hao]

As these two functions are used by other private features. e.g.
in error reporting private feature, it requires to check port status
and reset port for error clearing.

Signed-off-by: Xu Yilun <yilun...@intel.com>
Signed-off-by: Wu Hao <hao...@intel.com>
Acked-by: Moritz Fischer <m...@kernel.org>
Acked-by: Alan Tull <at...@kernel.org>
Signed-off-by: Moritz Fischer <m...@kernel.org>
---
v2: rebased.
---
 drivers/fpga/dfl-afu-main.c | 25 ++++++++++++++-----------
 drivers/fpga/dfl-afu.h      |  3 +++
 2 files changed, 17 insertions(+), 11 deletions(-)

diff --git a/drivers/fpga/dfl-afu-main.c b/drivers/fpga/dfl-afu-main.c
index fbd9553..22d294b 100644
--- a/drivers/fpga/dfl-afu-main.c
+++ b/drivers/fpga/dfl-afu-main.c
@@ -22,14 +22,16 @@
 #include "dfl-afu.h"
 
 /**
- * port_enable - enable a port
+ * __port_enable - enable a port
  * @pdev: port platform device.
  *
  * Enable Port by clear the port soft reset bit, which is set by default.
  * The AFU is unable to respond to any MMIO access while in reset.
- * port_enable function should only be used after port_disable function.
+ * __port_enable function should only be used after __port_disable function.
+ *
+ * The caller needs to hold lock for protection.
  */
-static void port_enable(struct platform_device *pdev)
+void __port_enable(struct platform_device *pdev)
 {
        struct dfl_feature_platform_data *pdata = dev_get_platdata(&pdev->dev);
        void __iomem *base;
@@ -52,13 +54,14 @@ static void port_enable(struct platform_device *pdev)
 #define RST_POLL_TIMEOUT 1000 /* us */
 
 /**
- * port_disable - disable a port
+ * __port_disable - disable a port
  * @pdev: port platform device.
  *
- * Disable Port by setting the port soft reset bit, it puts the port into
- * reset.
+ * Disable Port by setting the port soft reset bit, it puts the port into 
reset.
+ *
+ * The caller needs to hold lock for protection.
  */
-static int port_disable(struct platform_device *pdev)
+int __port_disable(struct platform_device *pdev)
 {
        struct dfl_feature_platform_data *pdata = dev_get_platdata(&pdev->dev);
        void __iomem *base;
@@ -104,9 +107,9 @@ static int __port_reset(struct platform_device *pdev)
 {
        int ret;
 
-       ret = port_disable(pdev);
+       ret = __port_disable(pdev);
        if (!ret)
-               port_enable(pdev);
+               __port_enable(pdev);
 
        return ret;
 }
@@ -806,9 +809,9 @@ static int port_enable_set(struct platform_device *pdev, 
bool enable)
 
        mutex_lock(&pdata->lock);
        if (enable)
-               port_enable(pdev);
+               __port_enable(pdev);
        else
-               ret = port_disable(pdev);
+               ret = __port_disable(pdev);
        mutex_unlock(&pdata->lock);
 
        return ret;
diff --git a/drivers/fpga/dfl-afu.h b/drivers/fpga/dfl-afu.h
index 0c7630a..35e60c5 100644
--- a/drivers/fpga/dfl-afu.h
+++ b/drivers/fpga/dfl-afu.h
@@ -79,6 +79,9 @@ struct dfl_afu {
        struct dfl_feature_platform_data *pdata;
 };
 
+void __port_enable(struct platform_device *pdev);
+int __port_disable(struct platform_device *pdev);
+
 void afu_mmio_region_init(struct dfl_feature_platform_data *pdata);
 int afu_mmio_region_add(struct dfl_feature_platform_data *pdata,
                        u32 region_index, u64 region_size, u64 phys, u32 flags);
-- 
1.8.3.1