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fpga: dfl: add dfl_fpga_check_port_id function.

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This patch adds one common function in DFL framework. It uses
port_ops get_id callback to get port id and compare it with given
value. This function could be used as match function of the
dfl_fpga_cdev_find_port function.

Signed-off-by: Wu Hao <hao.wu@intel.com>
Acked-by: Alan Tull <atull@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Wu Hao 2018-06-30 08:53:18 +08:00 committed by Greg Kroah-Hartman
parent 6e8fd6e493
commit d06b004b99
2 changed files with 23 additions and 0 deletions
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22
drivers/fpga/dfl.c
View File

@ -215,6 +215,28 @@ void dfl_fpga_port_ops_del(struct dfl_fpga_port_ops *ops)
}
EXPORT_SYMBOL_GPL(dfl_fpga_port_ops_del);
/**
* dfl_fpga_check_port_id - check the port id
* @pdev: port platform device.
* @pport_id: port id to compare.
*
* Return: 1 if port device matches with given port id, otherwise 0.
*/
int dfl_fpga_check_port_id(struct platform_device *pdev, void *pport_id)
{
struct dfl_fpga_port_ops *port_ops = dfl_fpga_port_ops_get(pdev);
int port_id;
if (!port_ops || !port_ops->get_id)
return 0;
port_id = port_ops->get_id(pdev);
dfl_fpga_port_ops_put(port_ops);
return port_id == *(int *)pport_id;
}
EXPORT_SYMBOL_GPL(dfl_fpga_check_port_id);
/**
* dfl_fpga_dev_feature_uinit - uinit for sub features of dfl feature device
* @pdev: feature device.

1
drivers/fpga/dfl.h
View File

@ -151,6 +151,7 @@ void dfl_fpga_port_ops_add(struct dfl_fpga_port_ops *ops);
void dfl_fpga_port_ops_del(struct dfl_fpga_port_ops *ops);
struct dfl_fpga_port_ops *dfl_fpga_port_ops_get(struct platform_device *pdev);
void dfl_fpga_port_ops_put(struct dfl_fpga_port_ops *ops);
int dfl_fpga_check_port_id(struct platform_device *pdev, void *pport_id);
/**
* struct dfl_feature_driver - sub feature's driver