admin/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2025-12-07 20:06:24 +00:00
Code Issues Packages Projects Releases Wiki Activity

net: enetc: add ptp timer binding support for i.MX94

Browse Source 
The i.MX94 has three PTP timers, and all standalone ENETCs can select
one of them to bind to as their PHC. The 'ptp-timer' property is used
to represent the PTP device of the Ethernet controller. So users can
add 'ptp-timer' to the ENETC node to specify the PTP timer. The driver
parses this property to bind the two hardware devices.

If the "ptp-timer" property is not present, the first timer of the PCIe
bus where the ENETC is located is used as the default bound PTP timer.

Signed-off-by: Clark Wang <xiaoning.wang@nxp.com>
Signed-off-by: Wei Fang <wei.fang@nxp.com>
Link: https://patch.msgid.link/20251029013900.407583-5-wei.fang@nxp.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Clark Wang
2025-10-29 09:38:58 +08:00
committed by Jakub Kicinski
parent ba5d7d45ce
commit 1cd3f21c18
1 changed files with 100 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

100
drivers/net/ethernet/freescale/enetc/netc_blk_ctrl.c
View File

@@ -66,6 +66,7 @@
/* NETC integrated endpoint register block register */
#define IERB_EMDIOFAUXR 0x344
#define IERB_T0FAUXR 0x444
#define IERB_ETBCR(a) (0x300c + 0x100 * (a))
#define IERB_EFAUXR(a) (0x3044 + 0x100 * (a))
#define IERB_VFAUXR(a) (0x4004 + 0x40 * (a))
#define FAUXR_LDID GENMASK(3, 0)
@@ -78,10 +79,16 @@
#define IMX94_ENETC0_BUS_DEVFN 0x100
#define IMX94_ENETC1_BUS_DEVFN 0x140
#define IMX94_ENETC2_BUS_DEVFN 0x180
#define IMX94_TIMER0_BUS_DEVFN 0x1
#define IMX94_TIMER1_BUS_DEVFN 0x101
#define IMX94_TIMER2_BUS_DEVFN 0x181
#define IMX94_ENETC0_LINK 3
#define IMX94_ENETC1_LINK 4
#define IMX94_ENETC2_LINK 5
#define NETC_ENETC_ID(a) (a)
#define NETC_TIMER_ID(a) (a)
/* Flags for different platforms */
#define NETC_HAS_NETCMIX BIT(0)
@@ -345,6 +352,98 @@ static int imx95_ierb_init(struct platform_device *pdev)
return 0;
}
static int imx94_get_enetc_id(struct device_node *np)
{
int bus_devfn = netc_of_pci_get_bus_devfn(np);
/* Parse ENETC offset */
switch (bus_devfn) {
case IMX94_ENETC0_BUS_DEVFN:
return NETC_ENETC_ID(0);
case IMX94_ENETC1_BUS_DEVFN:
return NETC_ENETC_ID(1);
case IMX94_ENETC2_BUS_DEVFN:
return NETC_ENETC_ID(2);
default:
return -EINVAL;
}
}
static int imx94_get_timer_id(struct device_node *np)
{
int bus_devfn = netc_of_pci_get_bus_devfn(np);
/* Parse NETC PTP timer ID, the timer0 is on bus 0,
* the timer 1 and timer2 is on bus 1.
*/
switch (bus_devfn) {
case IMX94_TIMER0_BUS_DEVFN:
return NETC_TIMER_ID(0);
case IMX94_TIMER1_BUS_DEVFN:
return NETC_TIMER_ID(1);
case IMX94_TIMER2_BUS_DEVFN:
return NETC_TIMER_ID(2);
default:
return -EINVAL;
}
}
static int imx94_enetc_update_tid(struct netc_blk_ctrl *priv,
struct device_node *np)
{
struct device *dev = &priv->pdev->dev;
struct device_node *timer_np;
int eid, tid;
eid = imx94_get_enetc_id(np);
if (eid < 0) {
dev_err(dev, "Failed to get ENETC ID\n");
return eid;
}
timer_np = of_parse_phandle(np, "ptp-timer", 0);
if (!timer_np) {
/* If 'ptp-timer' is not present, the timer1 is the default
* timer of all standalone ENETCs, which is on the same PCIe
* bus as these ENETCs.
*/
tid = NETC_TIMER_ID(1);
goto end;
}
tid = imx94_get_timer_id(timer_np);
of_node_put(timer_np);
if (tid < 0) {
dev_err(dev, "Failed to get NETC Timer ID\n");
return tid;
}
end:
netc_reg_write(priv->ierb, IERB_ETBCR(eid), tid);
return 0;
}
static int imx94_ierb_init(struct platform_device *pdev)
{
struct netc_blk_ctrl *priv = platform_get_drvdata(pdev);
struct device_node *np = pdev->dev.of_node;
int err;
for_each_child_of_node_scoped(np, child) {
for_each_child_of_node_scoped(child, gchild) {
if (!of_device_is_compatible(gchild, "pci1131,e101"))
continue;
err = imx94_enetc_update_tid(priv, gchild);
if (err)
return err;
}
}
return 0;
}
static int netc_ierb_init(struct platform_device *pdev)
{
struct netc_blk_ctrl *priv = platform_get_drvdata(pdev);
@@ -441,6 +540,7 @@ static const struct netc_devinfo imx95_devinfo = {
static const struct netc_devinfo imx94_devinfo = {
.flags = NETC_HAS_NETCMIX,
.netcmix_init = imx94_netcmix_init,
.ierb_init = imx94_ierb_init,
};
static const struct of_device_id netc_blk_ctrl_match[] = {