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net: ethernet: ti: cpsw: fix cpts irq after suspend 

Depending on the SoC/platform the CPSW can completely lose context after a
suspend/resume cycle, including CPSW wrapper (WR) which will cause reset of
WR_C0_MISC_EN register, so CPTS IRQ will became disabled.

Fix it by moving CPTS IRQ enabling in cpsw_ndo_open() where CPTS is
actually started.

Fixes: 84ea9c0a95 ("net: ethernet: ti: cpsw: enable cpts irq")
Reported-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
Tested-by: Tony Lindgren <tony@atomide.com>
Link: https://lore.kernel.org/r/20201112111546.20343-1-grygorii.strashko@ti.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Grygorii Strashko 2020-11-12 13:15:46 +02:00 committed by Jakub Kicinski
parent 1395f8df87
commit 2b56687330
2 changed files with 12 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
drivers/net/ethernet/ti/cpsw.c
View File

@ -838,9 +838,12 @@ static int cpsw_ndo_open(struct net_device *ndev)
if (ret < 0)
goto err_cleanup;
if (cpts_register(cpsw->cpts))
dev_err(priv->dev, "error registering cpts device\n");
if (cpsw->cpts) {
if (cpts_register(cpsw->cpts))
dev_err(priv->dev, "error registering cpts device\n");
else
writel(0x10, &cpsw->wr_regs->misc_en);
}
}
cpsw_restore(priv);
@ -1716,7 +1719,6 @@ static int cpsw_probe(struct platform_device *pdev)
/* Enable misc CPTS evnt_pend IRQ */
cpts_set_irqpoll(cpsw->cpts, false);
writel(0x10, &cpsw->wr_regs->misc_en);
skip_cpts:
cpsw_notice(priv, probe,

9
drivers/net/ethernet/ti/cpsw_new.c
View File

@ -873,8 +873,12 @@ static int cpsw_ndo_open(struct net_device *ndev)
if (ret < 0)
goto err_cleanup;
if (cpts_register(cpsw->cpts))
dev_err(priv->dev, "error registering cpts device\n");
if (cpsw->cpts) {
if (cpts_register(cpsw->cpts))
dev_err(priv->dev, "error registering cpts device\n");
else
writel(0x10, &cpsw->wr_regs->misc_en);
}
napi_enable(&cpsw->napi_rx);
napi_enable(&cpsw->napi_tx);
@ -2006,7 +2010,6 @@ static int cpsw_probe(struct platform_device *pdev)
/* Enable misc CPTS evnt_pend IRQ */
cpts_set_irqpoll(cpsw->cpts, false);
writel(0x10, &cpsw->wr_regs->misc_en);
skip_cpts:
ret = cpsw_register_notifiers(cpsw);