[PATCH net-next 1/2] net: pcs: rzn1-miic: Make usage of miic_port_max consistent

[Kyle Hendry via B4 Relay <devnull+khendry.reliablecontrols.com@kernel.org>]

From: Kyle Hendry <khendry@reliablecontrols.com>

miic_port_max is used both as the last port number and the port count
which can be different depending on SoC numbering. Use compile time
information to always set this as count and fix logic that was expecting
the last port number.

Signed-off-by: Kyle Hendry <khendry@reliablecontrols.com>
---
 drivers/net/pcs/pcs-rzn1-miic.c | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/drivers/net/pcs/pcs-rzn1-miic.c b/drivers/net/pcs/pcs-rzn1-miic.c
index cb74861e823c..62daaf76e052 100644
--- a/drivers/net/pcs/pcs-rzn1-miic.c
+++ b/drivers/net/pcs/pcs-rzn1-miic.c
@@ -59,6 +59,8 @@
 
 #define MIIC_MAX_NUM_RSTS		2
 
+#define MIIC_PORT_END(x) ((x)->miic_port_start + (x)->miic_port_max - 1)
+
 /**
  * struct modctrl_match - Matching table entry for  convctrl configuration
  *			  See section 8.2.1 of manual.
@@ -222,7 +224,7 @@ enum miic_type {
  * @index_to_string: String representations of the index values
  * @index_to_string_count: Number of entries in the index_to_string array
  * @miic_port_start: MIIC port start number
- * @miic_port_max: Maximum MIIC supported
+ * @miic_port_max: Count of total MIIC ports supported
  * @sw_mode_mask: Switch mode mask
  * @reset_ids: Reset names array
  * @reset_count: Number of entries in the reset_ids array
@@ -482,7 +484,7 @@ struct phylink_pcs *miic_create(struct device *dev, struct device_node *np)
 
 	miic = platform_get_drvdata(pdev);
 	of_data = miic->of_data;
-	if (port > of_data->miic_port_max || port < of_data->miic_port_start) {
+	if (port > MIIC_PORT_END(of_data) || port < of_data->miic_port_start) {
 		put_device(&pdev->dev);
 		return ERR_PTR(-EINVAL);
 	}
@@ -822,7 +824,7 @@ static struct miic_of_data rzn1_miic_of_data = {
 	.index_to_string = index_to_string,
 	.index_to_string_count = ARRAY_SIZE(index_to_string),
 	.miic_port_start = 1,
-	.miic_port_max = 5,
+	.miic_port_max = ARRAY_SIZE(index_to_string) - 1,
 	.sw_mode_mask = GENMASK(4, 0),
 	.init_unlock_lock_regs = true,
 	.miic_write = miic_reg_writel_unlocked,
@@ -838,7 +840,7 @@ static struct miic_of_data rzt2h_miic_of_data = {
 	.index_to_string = rzt2h_index_to_string,
 	.index_to_string_count = ARRAY_SIZE(rzt2h_index_to_string),
 	.miic_port_start = 0,
-	.miic_port_max = 4,
+	.miic_port_max = ARRAY_SIZE(rzt2h_index_to_string) - 1,
 	.sw_mode_mask = GENMASK(2, 0),
 	.reset_ids = rzt2h_reset_ids,
 	.reset_count = ARRAY_SIZE(rzt2h_reset_ids),

-- 
2.43.0