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nvethernet: runtime power gating/ungating for MGBE

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Adds support for runtime power gating/ungating
for MGBE through Linux PM runtime API's.

It requires power-domains DT entry to be part
of ethernet DT node.

Bug 200740290

Change-Id: I95727e8cbb5615d01603f4bb456253f05ff32d42
Signed-off-by: Bhadram Varka <vbhadram@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvidia/+/2548337
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
Reviewed-by: svcacv <svcacv@nvidia.com>
Reviewed-by: svc_kernel_abi <svc_kernel_abi@nvidia.com>
Reviewed-by: Srinivas Ramachandran <srinivasra@nvidia.com>
Reviewed-by: Sachin Nikam <snikam@nvidia.com>
Reviewed-by: Narayan Reddy <narayanr@nvidia.com>
Reviewed-by: Bitan Biswas <bbiswas@nvidia.com>
Reviewed-by: Aleksandr Frid <afrid@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
GVS: Gerrit_Virtual_Submit
This commit is contained in:
Bhadram Varka
2021-06-22 18:04:10 +05:30
committed by Revanth Kumar Uppala
parent 537d6aa16b
commit 232d3615da
2 changed files with 30 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

30
drivers/net/ethernet/nvidia/nvethernet/ether_linux.c
View File

@@ -2272,10 +2272,18 @@ static int ether_open(struct net_device *dev)
ether_start_ivc(pdata);
if (osi_core->mac == OSI_MAC_HW_MGBE) {
ret = pm_runtime_get_sync(pdata->dev);
if (ret < 0) {
dev_err(&dev->dev, "failed to ungate MGBE power\n");
goto err_get_sync;
}
}
ret = ether_enable_clks(pdata);
if (ret < 0) {
dev_err(&dev->dev, "failed to enable clks\n");
return ret;
goto err_en_clks;
}
if (pdata->mac_rst) {
@@ -2455,6 +2463,10 @@ err_mac_rst:
if (gpio_is_valid(pdata->phy_reset)) {
gpio_set_value(pdata->phy_reset, OSI_DISABLE);
}
err_en_clks:
err_get_sync:
if (osi_core->mac == OSI_MAC_HW_MGBE)
pm_runtime_put_sync(pdata->dev);
return ret;
}
@@ -2653,6 +2665,9 @@ static int ether_close(struct net_device *ndev)
/* Disable clock */
ether_disable_clks(pdata);
if (pdata->osi_core->mac == OSI_MAC_HW_MGBE)
pm_runtime_put_sync(pdata->dev);
#ifdef MACSEC_SUPPORT
#ifdef DEBUG_MACSEC
ret = macsec_close(pdata->macsec_pdata);
@@ -5756,6 +5771,10 @@ static int ether_probe(struct platform_device *pdev)
raw_spin_lock_init(&pdata->rlock);
init_filter_values(pdata);
if (osi_core->mac == OSI_MAC_HW_MGBE)
pm_runtime_enable(pdata->dev);
/* Disable Clocks */
ether_disable_clks(pdata);
@@ -5837,6 +5856,9 @@ static int ether_remove(struct platform_device *pdev)
/* Assert MAC RST gpio */
if (pdata->mac_rst) {
reset_control_assert(pdata->mac_rst);
if (pdata->osi_core->mac == OSI_MAC_HW_MGBE) {
pm_runtime_disable(pdata->dev);
}
}
if (pdata->xpcs_rst) {
@@ -5926,6 +5948,9 @@ static int ether_suspend_noirq(struct device *dev)
/* disable MAC clocks */
ether_disable_clks(pdata);
if (osi_core->mac == OSI_MAC_HW_MGBE)
pm_runtime_put_sync(pdata->dev);
return 0;
}
@@ -5950,6 +5975,9 @@ static int ether_resume(struct ether_priv_data *pdata)
struct osi_ioctl ioctl_data = {};
int ret = 0;
if (osi_core->mac == OSI_MAC_HW_MGBE)
pm_runtime_get_sync(pdata->dev);
if (pdata->mac_rst) {
ret = reset_control_reset(pdata->mac_rst);
if (ret < 0) {