diff options
| author | Geert Uytterhoeven <[email protected]> | 2020-02-11 19:18:55 +0100 |
|---|---|---|
| committer | Herbert Xu <[email protected]> | 2020-02-22 09:25:42 +0800 |
| commit | 30332eeefec8f83afcea00c360f99ef64b87f220 (patch) | |
| tree | f1d07f6fe23cb002d66933b9cc35e3c626d03db6 /include/linux/debugfs.h | |
| parent | 9e00df7156e45e42c695ffc596b4bf1328d00516 (diff) | |
debugfs: regset32: Add Runtime PM support
Hardware registers of devices under control of power management cannot
be accessed at all times. If such a device is suspended, register
accesses may lead to undefined behavior, like reading bogus values, or
causing exceptions or system lock-ups.
Extend struct debugfs_regset32 with an optional field to let device
drivers specify the device the registers in the set belong to. This
allows debugfs_show_regset32() to make sure the device is resumed while
its registers are being read.
Signed-off-by: Geert Uytterhoeven <[email protected]>
Reviewed-by: Niklas Söderlund <[email protected]>
Reviewed-by: Greg Kroah-Hartman <[email protected]>
Acked-by: Rafael J. Wysocki <[email protected]>
Signed-off-by: Herbert Xu <[email protected]>
Diffstat (limited to 'include/linux/debugfs.h')
| -rw-r--r-- | include/linux/debugfs.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/debugfs.h b/include/linux/debugfs.h index 3d013de64f70..ad416853e722 100644 --- a/include/linux/debugfs.h +++ b/include/linux/debugfs.h @@ -35,6 +35,7 @@ struct debugfs_regset32 { const struct debugfs_reg32 *regs; int nregs; void __iomem *base; + struct device *dev; /* Optional device for Runtime PM */ }; extern struct dentry *arch_debugfs_dir; |