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| author | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2018-05-29 07:01:07 +0200 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2018-07-12 03:59:13 +0200 |
| commit | a2e7da86cc392417b0d9f605b28038aae80b002f (patch) | |
| tree | 67055b97934d16fe02af373a2178a52b66eca24a /drivers/fsi/fsi-master.h | |
| parent | fsi: Move code around to avoid forward declaration (diff) | |
| download | linux-a2e7da86cc392417b0d9f605b28038aae80b002f.tar.xz linux-a2e7da86cc392417b0d9f605b28038aae80b002f.zip | |
fsi: Add mechanism to set the tSendDelay and tEchoDelay values
Those values control the amount of "dummy" clocks between commands and
between a command and its response.
This adds a way to configure them from sysfs (to be later extended to
defaults in the device-tree). The default remains 16 (the HW default).
This is only supported if the backend supports the new link_config()
callback to configure the generation of those delays.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Reviewed-by: Joel Stanley <joel@jms.id.au>
---
Diffstat (limited to 'drivers/fsi/fsi-master.h')
| -rw-r--r-- | drivers/fsi/fsi-master.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/fsi/fsi-master.h b/drivers/fsi/fsi-master.h index ee0b46086026..7d619c68ab9b 100644 --- a/drivers/fsi/fsi-master.h +++ b/drivers/fsi/fsi-master.h @@ -33,6 +33,8 @@ struct fsi_master { int (*term)(struct fsi_master *, int link, uint8_t id); int (*send_break)(struct fsi_master *, int link); int (*link_enable)(struct fsi_master *, int link); + int (*link_config)(struct fsi_master *, int link, + u8 t_send_delay, u8 t_echo_delay); }; #define dev_to_fsi_master(d) container_of(d, struct fsi_master, dev) |