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net: fec: add stop mode support for imx8 platform

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The current driver support stop mode by calling machine api.
The patch add dts support to set GPR register for stop request.

imx8mq enter stop/exit stop mode by setting GPR bit, which can
be accessed by A core.
imx8qm enter stop/exit stop mode by calling IMX_SC ipc APIs that
communicate with M core ipc service, and the M core set the related
GPR bit at last.

Signed-off-by: Wei Fang <wei.fang@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Wei Fang 2022-09-02 10:30:01 +08:00 committed by David S. Miller
parent e26c258434
commit 40c79ce13b
2 changed files with 39 additions and 0 deletions
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4
drivers/net/ethernet/freescale/fec.h
View file

@ -18,6 +18,8 @@
#include <linux/net_tstamp.h>
#include <linux/ptp_clock_kernel.h>
#include <linux/timecounter.h>
#include <dt-bindings/firmware/imx/rsrc.h>
#include <linux/firmware/imx/sci.h>
#if defined(CONFIG_M523x) || defined(CONFIG_M527x) || defined(CONFIG_M528x) || \
defined(CONFIG_M520x) || defined(CONFIG_M532x) || defined(CONFIG_ARM) || \
@ -641,6 +643,8 @@ struct fec_enet_private {
u8 at_inc_corr;
} ptp_saved_state;
struct imx_sc_ipc *ipc_handle;
u64 ethtool_stats[];
};

35
drivers/net/ethernet/freescale/fec_main.c
View file

@ -1181,6 +1181,34 @@ fec_restart(struct net_device *ndev)
}
static int fec_enet_ipc_handle_init(struct fec_enet_private *fep)
{
if (!(of_machine_is_compatible("fsl,imx8qm") ||
of_machine_is_compatible("fsl,imx8qxp") ||
of_machine_is_compatible("fsl,imx8dxl")))
return 0;
return imx_scu_get_handle(&fep->ipc_handle);
}
static void fec_enet_ipg_stop_set(struct fec_enet_private *fep, bool enabled)
{
struct device_node *np = fep->pdev->dev.of_node;
u32 rsrc_id, val;
int idx;
if (!np || !fep->ipc_handle)
return;
idx = of_alias_get_id(np, "ethernet");
if (idx < 0)
idx = 0;
rsrc_id = idx ? IMX_SC_R_ENET_1 : IMX_SC_R_ENET_0;
val = enabled ? 1 : 0;
imx_sc_misc_set_control(fep->ipc_handle, rsrc_id, IMX_SC_C_IPG_STOP, val);
}
static void fec_enet_stop_mode(struct fec_enet_private *fep, bool enabled)
{
struct fec_platform_data *pdata = fep->pdev->dev.platform_data;
@ -1196,6 +1224,8 @@ static void fec_enet_stop_mode(struct fec_enet_private *fep, bool enabled)
BIT(stop_gpr->bit), 0);
} else if (pdata && pdata->sleep_mode_enable) {
pdata->sleep_mode_enable(enabled);
} else {
fec_enet_ipg_stop_set(fep, enabled);
}
}
@ -3851,6 +3881,10 @@ fec_probe(struct platform_device *pdev)
!of_property_read_bool(np, "fsl,err006687-workaround-present"))
fep->quirks |= FEC_QUIRK_ERR006687;
ret = fec_enet_ipc_handle_init(fep);
if (ret)
goto failed_ipc_init;
if (of_get_property(np, "fsl,magic-packet", NULL))
fep->wol_flag |= FEC_WOL_HAS_MAGIC_PACKET;
@ -4048,6 +4082,7 @@ fec_probe(struct platform_device *pdev)
of_phy_deregister_fixed_link(np);
of_node_put(phy_node);
failed_stop_mode:
failed_ipc_init:
failed_phy:
dev_id--;
failed_ioremap: