53 lines
1.5 KiB
Diff
53 lines
1.5 KiB
Diff
From 211c20a459a0fd4868ed22ecfc2b2186d9df6da0 Mon Sep 17 00:00:00 2001
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From: Joakim Zhang <qiangqing.zhang@nxp.com>
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Date: Tue, 30 Jul 2019 14:43:25 +0800
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Subject: [PATCH] can: flexcan: add LPSR mode support for i.MX7D
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For i.MX7D LPSR mode, the controller will lost power and got the
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configuration state lost after system resume back.
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So we need to set pinctrl state again and re-start chip to do
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re-configuration after resume.
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For wakeup case, it should not set pinctrl to sleep state by
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pinctrl_pm_select_sleep_state.
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For interface is not up before suspend case, we don't need
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re-configure as it will be configured by user later by interface up.
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Signed-off-by: Joakim Zhang <qiangqing.zhang@nxp.com>
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---
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drivers/net/can/flexcan.c | 21 ++++++++++++++-------
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1 file changed, 14 insertions(+), 7 deletions(-)
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--- a/drivers/net/can/flexcan.c
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+++ b/drivers/net/can/flexcan.c
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@@ -26,6 +26,7 @@
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#include <linux/platform_device.h>
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#include <linux/pm_runtime.h>
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#include <linux/regulator/consumer.h>
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+#include <linux/pinctrl/consumer.h>
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#include <linux/regmap.h>
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#define DRV_NAME "flexcan"
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@@ -1955,9 +1956,7 @@ static int __maybe_unused flexcan_suspen
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if (err)
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return err;
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} else {
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- err = flexcan_chip_disable(priv);
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- if (err)
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- return err;
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+ flexcan_chip_stop(dev);
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}
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netif_stop_queue(dev);
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netif_device_detach(dev);
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@@ -1983,7 +1982,9 @@ static int __maybe_unused flexcan_resume
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if (err)
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return err;
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} else {
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- err = flexcan_chip_enable(priv);
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+ err = flexcan_chip_start(dev);
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+ if (err)
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+ return err;
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}
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}
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