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authorPierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>2021-08-18 06:01:30 +0300
committerVinod Koul <vkoul@kernel.org>2021-08-23 15:10:34 +0300
commit2564a2d4418bac166a9db2d6ca2f8b99953b1df5 (patch)
tree0276cb42d9f6d7b1417caa17b8edd01abdf593bf /drivers/soundwire/cadence_master.c
parent029bfd1cd53cd8ba896a676e5c1bcf6cd0100d3c (diff)
downloadlinux-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>
Diffstat (limited to 'drivers/soundwire/cadence_master.c')
-rw-r--r--drivers/soundwire/cadence_master.c5
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,