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Message-Id: <20220902023001.2258165-1-wei.fang@nxp.com> Date: Fri, 2 Sep 2022 10:30:01 +0800 From: wei.fang@....com To: davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org, pabeni@...hat.com Cc: netdev@...r.kernel.org, linux-kernel@...r.kernel.org Subject: [PATCH V2 net-next] net: fec: add stop mode support for imx8 platform From: Wei Fang <wei.fang@....com> 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@....com> --- V2 change: V1 patch does not apply, so rebase it. --- drivers/net/ethernet/freescale/fec.h | 4 +++ drivers/net/ethernet/freescale/fec_main.c | 35 +++++++++++++++++++++++ 2 files changed, 39 insertions(+) diff --git a/drivers/net/ethernet/freescale/fec.h b/drivers/net/ethernet/freescale/fec.h index 0cebe4b63adb..68bc16058bae 100644 --- a/drivers/net/ethernet/freescale/fec.h +++ b/drivers/net/ethernet/freescale/fec.h @@ -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[]; }; diff --git a/drivers/net/ethernet/freescale/fec_main.c b/drivers/net/ethernet/freescale/fec_main.c index 7211597d323d..8ba8eb340b92 100644 --- a/drivers/net/ethernet/freescale/fec_main.c +++ b/drivers/net/ethernet/freescale/fec_main.c @@ -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: -- 2.25.1
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