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Merge "net: stmmac: Disable/Enable GDSC regulators on LPM"

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qctecmdr 2024-01-11 22:52:36 -08:00 committed by Gerrit - the friendly Code Review server
commit d2285b31af
2 changed files with 32 additions and 2 deletions
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27
drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c
View File

@ -1,6 +1,6 @@
// SPDX-License-Identifier: GPL-2.0
// Copyright (c) 2018-19, Linaro Limited
// Copyright (c) 2023 Qualcomm Innovation Center, Inc. All rights reserved.
// Copyright (c) 2023-2024 Qualcomm Innovation Center, Inc. All rights reserved.
#include <linux/module.h>
#include <linux/of.h>
@ -1522,6 +1522,15 @@ static int qcom_ethqos_probe(struct platform_device *pdev)
}
ETHQOSDBG(": emac_core_version = %d\n", ethqos->emac_ver);
if (of_property_read_bool(pdev->dev.of_node,
"gdsc-off-on-suspend")) {
ethqos->gdsc_off_on_suspend = true;
} else {
ethqos->gdsc_off_on_suspend = false;
}
ETHQOSDBG("gdsc-off-on-suspend = %d\n",
ethqos->gdsc_off_on_suspend);
ret = stmmac_dvr_probe(&pdev->dev, plat_dat, &stmmac_res);
if (ret)
goto err_clk;
@ -1600,6 +1609,13 @@ static int qcom_ethqos_suspend(struct device *dev)
ret = stmmac_suspend(dev);
qcom_ethqos_phy_suspend_clks(ethqos);
if (ethqos->gdsc_off_on_suspend) {
if (ethqos->gdsc_emac) {
regulator_disable(ethqos->gdsc_emac);
ETHQOSDBG("Disabled <%s>\n", EMAC_GDSC_EMAC_NAME);
}
}
ETHQOSDBG(" ret = %d\n", ret);
return ret;
}
@ -1619,6 +1635,13 @@ static int qcom_ethqos_resume(struct device *dev)
if (!ethqos)
return -ENODEV;
if (ethqos->gdsc_off_on_suspend) {
ret = regulator_enable(ethqos->gdsc_emac);
if (ret)
ETHQOSERR("Can not enable <%s>\n", EMAC_GDSC_EMAC_NAME);
ETHQOSDBG("Enabled <%s>\n", EMAC_GDSC_EMAC_NAME);
}
ndev = dev_get_drvdata(dev);
if (!ndev || !netif_running(ndev)) {
ETHQOSERR(" Resume not possible\n");
@ -1626,6 +1649,8 @@ static int qcom_ethqos_resume(struct device *dev)
}
qcom_ethqos_phy_resume_clks(ethqos);
if (ethqos->gdsc_off_on_suspend)
ethqos_set_func_clk_en(ethqos);
ret = stmmac_resume(dev);

7
drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.h
View File

@ -1,5 +1,5 @@
/* SPDX-License-Identifier: GPL-2.0-only */
/*Copyright (c) 2023 Qualcomm Innovation Center, Inc. All rights reserved.*/
/*Copyright (c) 2023-2024 Qualcomm Innovation Center, Inc. All rights reserved.*/
#ifndef _DWMAC_QCOM_ETHQOS_H
#define _DWMAC_QCOM_ETHQOS_H
@ -40,6 +40,8 @@
#define EMAC_HW_v4_0_0 0x40000000
#define EMAC_HW_vMAX 9
#define EMAC_GDSC_EMAC_NAME "gdsc_emac"
struct ethqos_emac_por {
unsigned int offset;
unsigned int value;
@ -81,6 +83,9 @@ struct qcom_ethqos {
/* Boolean to check if clock is suspended*/
int clks_suspended;
struct completion clk_enable_done;
/* Boolean flag for turning off GDSC during suspend */
bool gdsc_off_on_suspend;
};
int ethqos_init_reqgulators(struct qcom_ethqos *ethqos);