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| author | Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> | 2021-08-18 06:01:30 +0300 |
|---|---|---|
| committer | Vinod Koul <vkoul@kernel.org> | 2021-08-23 15:10:34 +0300 |
| commit | 2564a2d4418bac166a9db2d6ca2f8b99953b1df5 (patch) | |
| tree | 0276cb42d9f6d7b1417caa17b8edd01abdf593bf | |
| parent | 029bfd1cd53cd8ba896a676e5c1bcf6cd0100d3c (diff) | |
| download | linux-2564a2d4418bac166a9db2d6ca2f8b99953b1df5.tar.xz | |
soundwire: cadence: do not extend reset delay
The duration of the hw_reset is defined as 4096 cycles. The Cadence IP
allows for an additional delay which doesn't seem necessary in
practice: the actual reset sequence duration is defined by the sync_go
mechanism, not by the IP itself.
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Rander Wang <rander.wang@intel.com>
Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Link: https://lore.kernel.org/r/20210818030130.17113-1-yung-chuan.liao@linux.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
| -rw-r--r-- | drivers/soundwire/cadence_master.c | 5 |
1 files changed, 1 insertions, 4 deletions
diff --git a/drivers/soundwire/cadence_master.c b/drivers/soundwire/cadence_master.c index 0b7f037e6cd0..4fcc3ba93004 100644 --- a/drivers/soundwire/cadence_master.c +++ b/drivers/soundwire/cadence_master.c @@ -1032,10 +1032,7 @@ EXPORT_SYMBOL(sdw_cdns_check_self_clearing_bits); */ int sdw_cdns_exit_reset(struct sdw_cdns *cdns) { - /* program maximum length reset to be safe */ - cdns_updatel(cdns, CDNS_MCP_CONTROL, - CDNS_MCP_CONTROL_RST_DELAY, - CDNS_MCP_CONTROL_RST_DELAY); + /* keep reset delay unchanged to 4096 cycles */ /* use hardware generated reset */ cdns_updatel(cdns, CDNS_MCP_CONTROL, |