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soundwire: cadence_master: clear interrupt status before enabling interrupt

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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>
This commit is contained in:
Rander Wang 2020-01-10 15:57:27 -06:00 committed by Vinod Koul
parent a2cff9ee4b
commit 5ebb094541
1 changed files with 10 additions and 0 deletions
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10
drivers/soundwire/cadence_master.c
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@ -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);