[PATCH v6 4/4] fpga: xilinx-core: add new gpio names for prog and init

[Charles Perry <charles.perry@xxxxxxxxxxxxxxxxxxxx>]

Old names (prog_b and init-b) are used as a fallback for hardware
compatible with the "xlnx,fpga-slave-serial" string.

Signed-off-by: Charles Perry <charles.perry@xxxxxxxxxxxxxxxxxxxx>
---
 drivers/fpga/xilinx-core.c | 20 ++++++++++++++++++--
 1 file changed, 18 insertions(+), 2 deletions(-)

diff --git a/drivers/fpga/xilinx-core.c b/drivers/fpga/xilinx-core.c
index a35c43382dd5f..39aeacf2e4f17 100644
--- a/drivers/fpga/xilinx-core.c
+++ b/drivers/fpga/xilinx-core.c
@@ -171,6 +171,20 @@ static int xilinx_core_write_complete(struct fpga_manager *mgr,
 	return -ETIMEDOUT;
 }

+static inline struct gpio_desc *
+xilinx_core_devm_gpiod_get(struct device *dev, const char *con_id,
+			   const char *legacy_con_id, enum gpiod_flags flags)
+{
+	struct gpio_desc *desc;
+
+	desc = devm_gpiod_get(dev, con_id, flags);
+	if (IS_ERR(desc) && PTR_ERR(desc) == -ENOENT &&
+	    of_device_is_compatible(dev->of_node, "xlnx,fpga-slave-serial"))
+		desc = devm_gpiod_get(dev, legacy_con_id, flags);
+
+	return desc;
+}
+
 static const struct fpga_manager_ops xilinx_core_ops = {
 	.state = xilinx_core_state,
 	.write_init = xilinx_core_write_init,
@@ -186,12 +200,14 @@ int xilinx_core_probe(struct xilinx_fpga_core *core)
 		return -EINVAL;

 	/* PROGRAM_B is active low */
-	core->prog_b = devm_gpiod_get(core->dev, "prog_b", GPIOD_OUT_LOW);
+	core->prog_b = xilinx_core_devm_gpiod_get(core->dev, "prog", "prog_b",
+						  GPIOD_OUT_LOW);
 	if (IS_ERR(core->prog_b))
 		return dev_err_probe(core->dev, PTR_ERR(core->prog_b),
 				     "Failed to get PROGRAM_B gpio\n");

-	core->init_b = devm_gpiod_get_optional(core->dev, "init-b", GPIOD_IN);
+	core->init_b = xilinx_core_devm_gpiod_get(core->dev, "init", "init-b",
+						  GPIOD_IN);
 	if (IS_ERR(core->init_b))
 		return dev_err_probe(core->dev, PTR_ERR(core->init_b),
 				     "Failed to get INIT_B gpio\n");
--
2.43.0