commit 9c878996040b55ffbc9fbf77c36c4809dd121a01
author Markus Koch <markus@notsyncing.net> Tue Jan 11 19:22:54 2022 +0100
committer Ramon Fried <ramon@neureality.ai> Sat Jan 15 18:53:16 2022 +0200
tree 6744f462766d64a8e15e73464699831d1949bdbe
parent dfd03c122e8f666fa180088adeebbecf4805d672

net: fsl: Fix busy flag polling register

NXP's mEMAC reference manual, Chapter 6.5.5 "MDIO Ethernet Management
Interface usage", specifies to poll the BSY (0) bit in the CFG/STAT
register to wait until a transaction has finished, not bit 31 in the
data register.

In the Linux kernel, this has already been fixed in commit 26eee0210ad7
("net/fsl: fix a bug in xgmac_mdio").

This patch changes the register in the fman_mdio and fsl_ls_mdio
drivers.

As the MDIO_DATA_BSY define is no longer in use, this patch also removes
its definition from the fsl_memac header.

Signed-off-by: Markus Koch <markus@notsyncing.net>
Reviewed-by: Camelia Groza <camelia.groza@nxp.com>

drivers/net/fm/memac_phy.c

diff --git a/drivers/net/fm/memac_phy.c b/drivers/net/fm/memac_phy.c
index 72b500a..3ddae97 100644
--- a/drivers/net/fm/memac_phy.c
+++ b/drivers/net/fm/memac_phy.c
@@ -64,7 +64,7 @@
 {
 	unsigned int timeout = MAX_NUM_RETRIES;
 
-	while ((memac_in_32(&regs->mdio_data) & MDIO_DATA_BSY) && timeout--)
+	while ((memac_in_32(&regs->mdio_stat) & MDIO_STAT_BSY) && timeout--)
 		;
 
 	if (!timeout) {