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Subject[PATCH v5 5/6] fsi: Add aliased device numbering
Date
The I2C and SPI subsystems can use an aliased name to number the device.
Add similar support to the FSI subsystem for any device type.

Signed-off-by: Eddie James <eajames@linux.ibm.com>
---
drivers/fsi/fsi-core.c | 25 +++++++++++++++++++++++++
1 file changed, 25 insertions(+)

diff --git a/drivers/fsi/fsi-core.c b/drivers/fsi/fsi-core.c
index d591e68afd11..b77013b9d8a7 100644
--- a/drivers/fsi/fsi-core.c
+++ b/drivers/fsi/fsi-core.c
@@ -955,9 +955,34 @@ static int __fsi_get_new_minor(struct fsi_slave *slave, enum fsi_dev_type type,
return 0;
}

+static const char *const fsi_dev_type_names[] = {
+ "cfam",
+ "sbefifo",
+ "scom",
+ "occ",
+};
+
int fsi_get_new_minor(struct fsi_device *fdev, enum fsi_dev_type type,
dev_t *out_dev, int *out_index)
{
+ if (fdev->dev.of_node) {
+ int aid = of_alias_get_id(fdev->dev.of_node, fsi_dev_type_names[type]);
+
+ if (aid >= 0) {
+ int id = (aid << 4) | type;
+
+ id = ida_simple_get(&fsi_minor_ida, id, id + 1, GFP_KERNEL);
+ if (id >= 0) {
+ *out_index = aid;
+ *out_dev = fsi_base_dev + id;
+ return 0;
+ }
+
+ if (id != -ENOSPC)
+ return id;
+ }
+ }
+
return __fsi_get_new_minor(fdev->slave, type, out_dev, out_index);
}
EXPORT_SYMBOL_GPL(fsi_get_new_minor);
--
2.31.1
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