diff options
| author | Richard Cochran <richardcochran@gmail.com> | 2012-10-29 08:45:18 (GMT) |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2012-11-01 16:21:32 (GMT) |
| commit | 78ca0b287314ad6b7b06161b3ff9b13e8a8bcce0 (patch) | |
| tree | 99ab480436bf31cb253c334f57b5b9b039ad9f0a | |
| parent | 6b60393e08f9263c7b129d54eeb261e8f970175c (diff) | |
| download | linux-78ca0b287314ad6b7b06161b3ff9b13e8a8bcce0.tar.xz | |
cpsw: add a DT field for the active time stamping port
Because time stamping on both external ports of the switch simultaneously
is positively useless from the application's point of view, this patch
provides a DT configuration method to choose the active port.
Signed-off-by: Richard Cochran <richardcochran@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | Documentation/devicetree/bindings/net/cpsw.txt | 3 | ||||
| -rw-r--r-- | drivers/net/ethernet/ti/cpsw.c | 7 | ||||
| -rw-r--r-- | include/linux/platform_data/cpsw.h | 1 |
3 files changed, 11 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/net/cpsw.txt b/Documentation/devicetree/bindings/net/cpsw.txt index dba014f..9f61f2b 100644 --- a/Documentation/devicetree/bindings/net/cpsw.txt +++ b/Documentation/devicetree/bindings/net/cpsw.txt @@ -23,6 +23,7 @@ Required properties: - mac_control : Specifies Default MAC control register content for the specific platform - slaves : Specifies number for slaves +- cpts_active_slave : Specifies the slave to use for time stamping - slave_reg_ofs : Specifies slave register offset - sliver_reg_ofs : Specifies slave sliver register offset - phy_id : Specifies slave phy id @@ -60,6 +61,7 @@ Examples: rx_descs = <64>; mac_control = <0x20>; slaves = <2>; + cpts_active_slave = <0>; cpsw_emac0: slave@0 { slave_reg_ofs = <0x200>; sliver_reg_ofs = <0xd80>; @@ -95,6 +97,7 @@ Examples: rx_descs = <64>; mac_control = <0x20>; slaves = <2>; + cpts_active_slave = <0>; cpsw_emac0: slave@0 { slave_reg_ofs = <0x200>; sliver_reg_ofs = <0xd80>; diff --git a/drivers/net/ethernet/ti/cpsw.c b/drivers/net/ethernet/ti/cpsw.c index f1af5e0..f165791 100644 --- a/drivers/net/ethernet/ti/cpsw.c +++ b/drivers/net/ethernet/ti/cpsw.c @@ -847,6 +847,13 @@ static int cpsw_probe_dt(struct cpsw_platform_data *data, } data->slaves = prop; + if (of_property_read_u32(node, "cpts_active_slave", &prop)) { + pr_err("Missing cpts_active_slave property in the DT.\n"); + ret = -EINVAL; + goto error_ret; + } + data->cpts_active_slave = prop; + data->slave_data = kzalloc(sizeof(struct cpsw_slave_data) * data->slaves, GFP_KERNEL); if (!data->slave_data) { diff --git a/include/linux/platform_data/cpsw.h b/include/linux/platform_data/cpsw.h index a052b1d..15a077e 100644 --- a/include/linux/platform_data/cpsw.h +++ b/include/linux/platform_data/cpsw.h @@ -33,6 +33,7 @@ struct cpsw_platform_data { u32 slaves; /* number of slave cpgmac ports */ struct cpsw_slave_data *slave_data; + u32 cpts_active_slave; /* time stamping slave */ u32 ale_reg_ofs; /* address lookup engine reg offset */ u32 ale_entries; /* ale table size */ |