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

Pierre-Louis Bossart
2019-07-25T23:41:53Z

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(+)

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);
--
2.20.1