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| author |   Yong Wu <yong.wu@mediatek.com> | 2019-10-09 19:59:33 +0800 |
|---|---|---|
| committer |   Joerg Roedel <jroedel@suse.de> | 2019-10-15 14:25:34 +0200 |
| commit | fb03082a54acd66c61535edfefe96b2ff88ce7e2 (patch) | |
| tree | e895201d20c41f7f6c029c6e5072801845cac9af /drivers/memory/mtk-smi.c | |
| parent | Linux 5.4-rc3 (diff) | |
| download | linux-dev-fb03082a54acd66c61535edfefe96b2ff88ce7e2.tar.xz linux-dev-fb03082a54acd66c61535edfefe96b2ff88ce7e2.zip | |
memory: mtk-smi: Add PM suspend and resume ops
In the commit 4f0a1a1ae351 ("memory: mtk-smi: Invoke pm runtime_callback
to enable clocks"), we use pm_runtime callback to enable/disable the smi
larb clocks. It will cause the larb's clock may not be disabled when
suspend. That is because device_prepare will call pm_runtime_get_noresume
which will keep the larb's PM runtime status still is active when suspend,
then it won't enter our pm_runtime suspend callback to disable the
corresponding clocks.
This patch adds suspend pm_ops to force disable the clocks, Use "LATE" to
make sure it disable the larb's clocks after the multimedia devices.
Fixes: 4f0a1a1ae351 ("memory: mtk-smi: Invoke pm runtime_callback to enable clocks")
Signed-off-by: Anan Sun <anan.sun@mediatek.com>
Signed-off-by: Yong Wu <yong.wu@mediatek.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'drivers/memory/mtk-smi.c')
| -rw-r--r-- | drivers/memory/mtk-smi.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/memory/mtk-smi.c b/drivers/memory/mtk-smi.c index 439d7d886873..a113e811faab 100644 --- a/drivers/memory/mtk-smi.c +++ b/drivers/memory/mtk-smi.c @@ -366,6 +366,8 @@ static int __maybe_unused mtk_smi_larb_suspend(struct device *dev) static const struct dev_pm_ops smi_larb_pm_ops = { SET_RUNTIME_PM_OPS(mtk_smi_larb_suspend, mtk_smi_larb_resume, NULL) + SET_LATE_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, + pm_runtime_force_resume) }; static struct platform_driver mtk_smi_larb_driver = { @@ -507,6 +509,8 @@ static int __maybe_unused mtk_smi_common_suspend(struct device *dev) static const struct dev_pm_ops smi_common_pm_ops = { SET_RUNTIME_PM_OPS(mtk_smi_common_suspend, mtk_smi_common_resume, NULL) + SET_LATE_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, + pm_runtime_force_resume) }; static struct platform_driver mtk_smi_common_driver = { |