[PATCH net-next v2 06/10] net: ethernet: oa_tc6: Add MMS register formatting macro

[Ciprian Regus via B4 Relay <devnull+ciprian.regus.analog.com@kernel.org>]

From: Ciprian Regus <ciprian.regus@analog.com>

The Open Alliance TC6 standard defines multiple memory maps for the
MAC-PHY's register space. These are used to separate standard, vendor
and PHY MMD specific registers. Add a macro to make it more clear which
memory map each register is part of and allow easier definition.

Signed-off-by: Ciprian Regus <ciprian.regus@analog.com>

---
v2 changelog:
 - New patch
---
 drivers/net/ethernet/oa_tc6.c | 4 ++--
 include/linux/oa_tc6.h        | 3 +++
 2 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/oa_tc6.c b/drivers/net/ethernet/oa_tc6.c
index 904bd790159d..876891ca9859 100644
--- a/drivers/net/ethernet/oa_tc6.c
+++ b/drivers/net/ethernet/oa_tc6.c
@@ -471,7 +471,7 @@ int oa_tc6_mdiobus_read_c45(struct mii_bus *bus, int addr, int devnum,
 	if (ret < 0)
 		return ret;
 
-	ret = oa_tc6_read_register(tc6, (ret << 16) | regnum, &regval);
+	ret = oa_tc6_read_register(tc6, OA_TC6_MMS_REG(ret, regnum), &regval);
 	if (ret)
 		return ret;
 
@@ -489,7 +489,7 @@ int oa_tc6_mdiobus_write_c45(struct mii_bus *bus, int addr, int devnum,
 	if (ret < 0)
 		return ret;
 
-	return oa_tc6_write_register(tc6, (ret << 16) | regnum, val);
+	return oa_tc6_write_register(tc6, OA_TC6_MMS_REG(ret, regnum), val);
 }
 EXPORT_SYMBOL_GPL(oa_tc6_mdiobus_write_c45);
 
diff --git a/include/linux/oa_tc6.h b/include/linux/oa_tc6.h
index ad6f17218603..8b56a132c9e3 100644
--- a/include/linux/oa_tc6.h
+++ b/include/linux/oa_tc6.h
@@ -10,6 +10,9 @@
 #include <linux/etherdevice.h>
 #include <linux/spi/spi.h>
 
+#define OA_TC6_MMS_REG(mms, reg) \
+	((((mms) & GENMASK(3, 0)) << 16) | ((reg) & GENMASK(15, 0)))
+
 /* OPEN Alliance TC6 registers */
 
 #define OA_TC6_REG_PHYID			0x0001

-- 
2.43.0