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>
*/
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,