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[RFC,30/40] soundwire: cadence_master: add kernel parameter to override interrupt mask

Message ID 20190725234032.21152-31-pierre-louis.bossart@linux.intel.com (mailing list archive)
State New, archived
Headers show
Series soundwire: updates for 5.4 | expand

Commit Message

Pierre-Louis Bossart July 25, 2019, 11:40 p.m. UTC 
The code has a set of defaults which may not be relevant in all cases,
add kernel parameter as a helper - mostly for early board bring-up.

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
---
 drivers/soundwire/cadence_master.c | 7 +++++++
 1 file changed, 7 insertions(+)
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Patch

diff --git a/drivers/soundwire/cadence_master.c b/drivers/soundwire/cadence_master.c
index 18c6ac026e85..dede55072191 100644
--- a/drivers/soundwire/cadence_master.c
+++ b/drivers/soundwire/cadence_master.c
@@ -20,6 +20,10 @@ 
 #include "bus.h"
 #include "cadence_master.h"
 
+static int interrupt_mask;
+module_param_named(cnds_mcp_int_mask, interrupt_mask, int, 0444);
+MODULE_PARM_DESC(cdns_mcp_int_mask, "Cadence MCP IntMask");
+
 #define CDNS_MCP_CONFIG				0x0
 
 #define CDNS_MCP_CONFIG_MCMD_RETRY		GENMASK(27, 24)
@@ -830,6 +834,9 @@  int sdw_cdns_enable_interrupt(struct sdw_cdns *cdns)
 	/* now enable all of the above */
 	mask |= CDNS_MCP_INT_IRQ;
 
+	if (interrupt_mask) /* parameter override */
+		mask = interrupt_mask;
+
 	cdns_writel(cdns, CDNS_MCP_INTMASK, mask);
 
 	return do_reset(cdns);