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net: stmmac: Add Flexible PPS support

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This adds support for Flexible PPS output (which is equivalent
to per_out output of PTP subsystem).

Tested using an oscilloscope and the following commands:

1) Start PTP4L:
	# ptp4l -A -4 -H -m -i eth0 &
2) Set Flexible PPS frequency:
	# echo <idx> <ts> <tns> <ps> <pns> > /sys/class/ptp/ptpX/period

Where, ts/tns is start time and ps/pns is period time, and ptpX is ptp
of eth0.

Signed-off-by: Jose Abreu <joabreu@synopsys.com>
Cc: David S. Miller <davem@davemloft.net>
Cc: Joao Pinto <jpinto@synopsys.com>
Cc: Vitor Soares <soares@synopsys.com>
Cc: Giuseppe Cavallaro <peppe.cavallaro@st.com>
Cc: Alexandre Torgue <alexandre.torgue@st.com>
Cc: Richard Cochran <richardcochran@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jose Abreu
2018-05-31 18:01:27 +01:00
committed by David S. Miller
parent 9db9268fe4
commit 9a8a02c9d4
10 changed files with 145 additions and 3 deletions
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7
drivers/net/ethernet/stmicro/stmmac/hwif.h
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@@ -241,6 +241,7 @@ struct net_device;
struct rgmii_adv;
struct stmmac_safety_stats;
struct stmmac_tc_entry;
struct stmmac_pps_cfg;
/* Helpers to program the MAC core */
struct stmmac_ops {
@@ -313,6 +314,10 @@ struct stmmac_ops {
/* Flexible RX Parser */
int (*rxp_config)(void __iomem *ioaddr, struct stmmac_tc_entry *entries,
unsigned int count);
/* Flexible PPS */
int (*flex_pps_config)(void __iomem *ioaddr, int index,
struct stmmac_pps_cfg *cfg, bool enable,
u32 sub_second_inc, u32 systime_flags);
};
#define stmmac_core_init(__priv, __args...) \
@@ -379,6 +384,8 @@ struct stmmac_ops {
stmmac_do_callback(__priv, mac, safety_feat_dump, __args)
#define stmmac_rxp_config(__priv, __args...) \
stmmac_do_callback(__priv, mac, rxp_config, __args)
#define stmmac_flex_pps_config(__priv, __args...) \
stmmac_do_callback(__priv, mac, flex_pps_config, __args)
/* PTP and HW Timer helpers */
struct stmmac_hwtimestamp {