diff options
| author | Rander Wang <rander.wang@intel.com> | 2020-01-10 22:57:27 +0100 |
|---|---|---|
| committer | Vinod Koul <vkoul@kernel.org> | 2020-01-14 07:23:12 +0100 |
| commit | 5ebb0945419e5845137102c20b99714ea574a3d8 (patch) | |
| tree | 13ec210aa9128ec8b841b78c205bc6cb3082581c /drivers/soundwire/cadence_master.c | |
| parent | soundwire: cadence_master: filter out bad interrupts (diff) | |
| download | linux-5ebb0945419e5845137102c20b99714ea574a3d8.tar.xz linux-5ebb0945419e5845137102c20b99714ea574a3d8.zip | |
soundwire: cadence_master: clear interrupt status before enabling interrupt
make sure all interrupts status are cleared before enabling interrupt
so that there is no unexpected interrupt triggered.
Signed-off-by: Rander Wang <rander.wang@intel.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20200110215731.30747-3-pierre-louis.bossart@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.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/soundwire/cadence_master.c b/drivers/soundwire/cadence_master.c index a0ec21b64d42..847b8f5f0a32 100644 --- a/drivers/soundwire/cadence_master.c +++ b/drivers/soundwire/cadence_master.c @@ -856,6 +856,16 @@ int sdw_cdns_enable_interrupt(struct sdw_cdns *cdns, bool state) mask = interrupt_mask; update_masks: + /* clear slave interrupt status before enabling interrupt */ + if (state) { + u32 slave_state; + + slave_state = cdns_readl(cdns, CDNS_MCP_SLAVE_INTSTAT0); + cdns_writel(cdns, CDNS_MCP_SLAVE_INTSTAT0, slave_state); + slave_state = cdns_readl(cdns, CDNS_MCP_SLAVE_INTSTAT1); + cdns_writel(cdns, CDNS_MCP_SLAVE_INTSTAT1, slave_state); + } + cdns_writel(cdns, CDNS_MCP_SLAVE_INTMASK0, slave_intmask0); cdns_writel(cdns, CDNS_MCP_SLAVE_INTMASK1, slave_intmask1); cdns_writel(cdns, CDNS_MCP_INTMASK, mask); |