Messages in this thread Patch in this message | | | From | Pierre-Louis Bossart <> | Subject | [PATCH 2/6] soundwire: cadence_master: clear interrupt status before enabling interrupt | Date | Fri, 10 Jan 2020 15:57:27 -0600 |
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From: Rander Wang <rander.wang@intel.com>
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> --- drivers/soundwire/cadence_master.c | 10 ++++++++++ 1 file changed, 10 insertions(+)
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); -- 2.20.1
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