Commit 520cf600 authored by Antonio Borneo's avatar Antonio Borneo Committed by Jakub Kicinski

net: stmmac: fix disabling flexible PPS output

Accordingly to Synopsys documentation [1] and [2], when bit PPSEN0
in register MAC_PPS_CONTROL is set it selects the functionality
command in the same register, otherwise selects the functionality
control.
Command functionality is required to either enable (command 0x2)
and disable (command 0x5) the flexible PPS output, but the bit
PPSEN0 is currently set only for enabling.

Set the bit PPSEN0 to properly disable flexible PPS output.

Tested on STM32MP15x, based on dwmac 4.10a.

[1] DWC Ethernet QoS Databook 4.10a October 2014
[2] DWC Ethernet QoS Databook 5.00a September 2017
Signed-off-by: default avatarAntonio Borneo <antonio.borneo@st.com>
Fixes: 9a8a02c9 ("net: stmmac: Add Flexible PPS support")
Signed-off-by: default avatarJakub Kicinski <jakub.kicinski@netronome.com>
parent 5da202c8
......@@ -515,6 +515,7 @@ int dwmac5_flex_pps_config(void __iomem *ioaddr, int index,
if (!enable) {
val |= PPSCMDx(index, 0x5);
val |= PPSEN0;
writel(val, ioaddr + MAC_PPS_CONTROL);
return 0;
}
......
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